掲載種別：論文集(書籍)内論文  

DOI： 10.4028/p-7IX8Zr

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1080/15376494.2024.2373979

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.12913/22998624/175377

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.24425/ame.2024.149187

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ssi.2023.116286

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jallcom.2023.169844

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jeurceramsoc.2022.08.052

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1007/s11668-022-01432-7

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1002/adem.202101204

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ijmecsci.2021.106943

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.apples.2021.100073

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.matlet.2021.130356

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ssi.2021.115706

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jmapro.2020.12.036

Web of Science

Scopus

researchmap

掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1007/978-3-030-75381-8_179

Scopus

researchmap

掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.4028/www.scientific.net/MSF.1016.36

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1007/s00170-020-06206-9

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.3390/pr8111346

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1007/s00170-020-05864-z

Web of Science

Scopus

researchmap

その他リンク： https://link.springer.com/article/10.1007/s00170-020-05864-z/fulltext.html

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.mtla.2020.100718

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ceramint.2019.11.097

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jeurceramsoc.2019.04.047

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1007/s10853-018-03268-9

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.matlet.2018.11.111

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jeurceramsoc.2018.05.030

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.compstruct.2018.02.011

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.electacta.2017.09.073

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jeurceramsoc.2016.11.036

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jeurceramsoc.2016.07.006

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ceramint.2016.06.081

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ssi.2016.04.003

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jeurceramsoc.2016.01.034

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.engfailanal.2015.03.007

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.scriptamat.2014.11.014

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ultras.2014.09.001

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Electrochemical Society Inc.  

DOI： 10.1149/06801.0681ecst

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ssi.2014.09.019

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.matlet.2014.06.093

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ssi.2014.01.017

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/S1003-6326(14)63281-7

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1063/1.4891296

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1149/2.0011411jes

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.electacta.2013.07.096

Web of Science

Scopus

researchmap

掲載種別：研究論文（学術雑誌）  

DOI： 10.1002/fuce.201200161

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.scriptamat.2013.04.020

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.actamat.2013.01.068

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jeurceramsoc.2012.10.035

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.matdes.2012.09.002

Web of Science

Scopus

researchmap

DOI： 10.1016/j.matdes.2012.09.002

Web of Science

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ssi.2012.12.010

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1016/j.proeng.2013.03.182

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）   出版者・発行元：Electrochemical Society Inc.  

DOI： 10.1149/05802.0275ecst

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.msea.2012.06.093

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ssi.2012.06.017

Web of Science

Scopus

researchmap

DOI： 10.1116/1.3628632

Web of Science

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1002/app.33939

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ssi.2011.04.009

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ssi.2011.03.012

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1166/jnn.2011.3818

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1149/1.3570092

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1116/1.3628632

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.4028/www.scientific.net/DDF.312-315.989

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.4028/www.scientific.net/KEM.462-463.1290

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ssi.2010.08.023

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1007/s00707-010-0314-9

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.physe.2010.05.031

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ndteint.2010.01.003

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ssi.2010.01.023

Web of Science

Scopus

researchmap

記述言語：英語   出版者・発行元：The Japan Society of Mechanical Engineers  

The objective of present study is to present solution to determine the stress and displacement fields around an interface edge of a joint formed by quarter planes in which materials behaves as an elastic and a power-law hardening material. J₂-deformation plasticity theory under plane strain condition is assumed for the power-law hardening material. Both the balance of force and the continuity of displacements are satisfied on the interface iteratively. The stress fields are found to be singular with the type of r^{λ_i -1} singularity from the i-th order approximation, where r is the radial distance from the interface. The power of r in the stress equation depends on the hardening exponent n. (i +1) or more singular terms exist in the i-th order approximation for n < (i +1)/i .As n is increased the absolute value of the i-th order of singularity, |λ_i-1| ,tends to be decreased to zero when λ_i-1<0.

DOI： 10.1299/jmmp.4.1040

researchmap

記述言語：英語   出版者・発行元：The Japan Society of Mechanical Engineers  

Strain range controlled low-cycle fatigue tests were conducted using ultrasonic method in order to investigate the effect of plastic strain range on the remaining life of austenitic stainless steel SUS316NG before the onset of crack growth in its early stages of fatigue. It was found that the decrease in ultrasonic back-reflection intensity from the surface of the material, caused by the increase in average dislocation density with localized plastic deformation at persistent slip bands (PSBs), starts earlier with increase in the plastic strain range. The amount of decrease in ultrasonic back-reflection before the onset of crack growth increases for larger plastic strain range. The difference in the cumulative plastic strains at the onset of crack growth and at the onset of decrease in the ultrasonic back-reflection remained constant over the range of tested plastic strain. This result can be used to predict the remaining life before the onset of crack growth within the plastic strain range used in this study. In addition, we present and evaluate another method to predict damage evolution involving ultrasound attenuation caused by PSBs.

DOI： 10.1299/jmmp.4.376

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

The objective of present study is to develop an evaluation method of low cycle fatigue crack growth from PSBs of stainless steels using ultrasonic back reflected wave. Behavior of back reflection intensity change from the surface due to fatiguing was measured. It was found that the decrease of back reflection intensity depends on the plastic strain range when the ranges are kept constant. The onset of crack growth can be predicted in the load variation condition by the linearly cumulative plastic strain and the PSB damage model proposed.

DOI： 10.1299/jsmemecjo.2010.1.0_81

CiNii Books

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ssi.2009.09.001

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.jeurceramsoc.2009.01.014

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ijimpeng.2009.01.004

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ijimpeng.2008.04.004

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1115/1.3026557

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.1149/1.3205695

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.msea.2008.06.030

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.msea.2007.10.060

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1002/app.27887

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.actamat.2008.01.002

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1007/s10853-008-2518-0

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1142/S021797920804675X

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1142/S021797920804630X

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ndteint.2007.09.002

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.ijimpeng.2006.11.005

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1002/app.27019

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.4028/www.scientific.net/KEM.385-387.441

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.compositesb.2007.10.008

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.compositesb.2007.02.030

Web of Science

Scopus

researchmap

掲載種別：研究論文（国際会議プロシーディングス）  

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1007/s10853-007-1780-x

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1080/01495730601146402

Web of Science

Scopus

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

In this research, in-plane impact behaviors of the honeycomb structures randomly filled into some cells with stiff inclusions were analyzed by finite element (FE) analysis. Effect of random arrangement of inclusions on deformation processes and in-plane impact behavior of honeycomb structure was considered. During deformation processes of the models, growth of shear bands were disturbed by inclusions and cell region surrounded by inclusions did not deformed. Average stress increased and densification strain decreased with increasing fraction of inclusions. The honeycomb with 50% cells filled by the inclusions could not be deformed. Some models below 25% fraction of inclusions had higher absorbed energy than that of model with no inclusion and the others show lower ones.

DOI： 10.1299/jsmemecjo.2007.1.0_213

CiNii Books

researchmap

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.4028/www.scientific.net/KEM.345-346.1515

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.4028/www.scientific.net/KEM.345-346.1507

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.4028/www.scientific.net/KEM.345-346.1511

Web of Science

Scopus

researchmap

記述言語：英語   出版者・発行元：一般社団法人日本機械学会  

In the present study, we investigated the effect of adding a high molecular weight monomer to one with low molecular weight on the fracture toughness of epoxy resin in terms of cross-link density and heterogeneity. To characterize the cross-link density and heterogeneity, we evaluated the glass transition temperature, T_g, and fragility, m, from thermo-viscoelastic properties. To confirm the microstructure heterogeneity in the epoxy resins, we analyzed roughness of fracture surfaces with atomic force microscope. Over the range from 0 to 30wt% high molecular weight monomer used in the present work, we found that it induced lower cross-link density (lower T_g) and made epoxy resin more heterogeneous (lower m), and this resulted in higher K_<IC>. This study revealed that both T_g and m are effective for characterizing material in relation to the fracture toughness of the blended epoxy resins.

DOI： 10.1299/jsmemecjo.2007.1.0_193

CiNii Books

researchmap

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.4028/www.scientific.net/KEM.345-346.153

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.actamat.2006.03.026

Web of Science

Scopus

researchmap

記述言語：英語   出版者・発行元：一般社団法人日本機械学会  

In this paper, heterogeneity effect on mechanical properties was investigated for epoxy resin blended by two monomers: Epikote 828 and Epikote 1001, with several mixture ratios. Epikote 828 was blended with Epikote 1001 before curing on purpose to induce heterogeneity in epoxy resin. In order to characterize degrees of the cross linking and heterogeneity in the resin, the glass transition temperature and the fragility were determined from thermoviscoelastic properties. Comparing with the dynamic storage modulus E' and the fracture toughness, G_<IG>, it was clarified that high heterogeneity in the epoxy resin affected high E' and low G_<IC> due to the mobility of the resin. The fragility is efficient parameter to characterize heterogeneity related to mechanical properties.

DOI： 10.1299/jsmezairiki.2006.0_533

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：合成樹脂工業協会  

DOI： 10.11364/networkpolymer1996.27.Supplement_109

researchmap

記述言語：英語   出版者・発行元：一般社団法人日本機械学会  

The effect of two-silica-particle compositions on the thermo-viscoelastic properties of epoxy composites was studied according to Lewis and Nielsen's mixture law and particle packing model. The composite specimens varied with different compositions of two-silica-particle (240nm and 1.56μm) were prepared at the constant volume fraction, 0.30. The thermo-viscoelastic properties for neat epoxy and the composites were measured in the temperature ranges from 123K to 523K and compared to theoretical results according to Lewis and Nielsen's law with the maximum packing fraction of particles, φ_<max> of Ouchiyama and Tanaka's model. Consequently, thermo-viscoelastic properties of two silica particulates filled epoxy composites were definitely dependent on maximum packing fraction of particles below glass transition temperature T_g, and on mobility of matrix resin above T_g.

DOI： 10.1299/jsmezairiki.2006.0_531

CiNii Books

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1016/j.actamat.2004.10.035

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1080/01495730490498593

Web of Science

Scopus

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

We studied approximate analysis of mechanical properties for porous polypropylene plate considering inhomogeneous distribution of cells due to manufacturing process. In the analysis, porous plate was modeled on laminate plate theory by stacking different layers with uniform porosity. Tensile, compression and bending static tests were conducted to measure elastic modulus and plateau stress. Numerical results were confirmed to be valid, compared with experimental results. Inhomogeneous distribution of porosity was found to be important for mechanical behavior. We tried to predict behavior of the porous material subjected to impulsive compression according to time-temperature equivalent principle. The prediction agreed with experimental results of impact tests.

DOI： 10.1299/jsmemecjo.2005.1.0_275

CiNii Books

researchmap

掲載種別：研究論文（学術雑誌）  

DOI： 10.1002/app.21358

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.4028/0-87849-978-4.207

Web of Science

Scopus

researchmap

記述言語：日本語   出版者・発行元：合成樹脂工業協会  

DOI： 10.11364/networkpolymer1996.26.Supplement_189

researchmap

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

Web of Science

Scopus

researchmap

記述言語：日本語   掲載種別：研究論文（学術雑誌）   出版者・発行元：社団法人日本材料学会  

DOI： 10.2472/jsms.53.241

Scopus

CiNii Books

researchmap

その他リンク： https://jlc.jst.go.jp/DN/JALC/00236938092?from=CiNii

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

The effects of particle size on fracture behavior of epoxy resin filled by spherical silica particles were studied. The epoxy resin was reinforced with silica particles having different mean sizes (1.56μm and 0.24μm) under different mixture ratios of small and large particles with the same volume fraction, 0.30. The three point bending test was conducted to measure fracture toughness. Consequently, the fracture toughness for above 70% of smaller particles was nearly two and half times higher than that of pure epoxy and two times for that of 100% larger particles, respectively.

DOI： 10.1299/jsmemecjo.2004.1.0_359

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

We experimentally studied effect of ribs on impact energy absorption of a thin-walled cylinder. Several kinds of the specimens with different intervals and numbers of ribs were made of two kinds of aluminum alloys. The drop weight test was conducted to examine relations between impact force and deformation of the specimens. It was found that the crushing modes were strongly dependent on diameter and thickness of a specimen, and distance between ribs. Axisymmetric and non-axisymmetric crushing modes occurred for short distance and for long distance, respectively. The mean crushing force for the axisymmetric mode was larger than one for non-axisymmetric mode. It was clarified that the crushing behavior in an interval of rib was independent of one in other interval. Therefore, a cylinder with a lot of short interval ribs has high ability for impact energy absorption.

DOI： 10.1299/jsmemecjo.2004.1.0_223

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

In this study, we discussed the fracture criterion for mixed mode of the epoxy resin at the room temperature. We conducted the three- and four-point bending tests to determine the fracture toughness under mixed mode loading and compared the experimental results with three theoretical fracture criteria: maximum hoop stress theory, minimum strain density theory, and maximum energy release theory. At lower mode mixity, namely closer to mode I, the fracture envelope and the crack initiation angle could be roughly predicted by the theoretical criteria. However, at higher mode mixity, especially at the vicinity of mode II, the fracture envelope followed neither theoretical nor empirical criteria, which could be due to the effect of thermo-viscoelastic relaxation phenomena, even when the crack initiation angle followed the maximum hoop stress criterion.

DOI： 10.1299/jsmemecjo.2004.1.0_339

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

In this study, we discussed compressive behaviors of a paper and paper coated by polyethylene resin experimentally. The initial thickness of each paper under stress of 0.018 MPa was largely scattered in comparison with the basis weight, although the results according to ISO standard (under compression of 0.1MPa) were. The thickness was immediately decreased for low compressive stress, since gap between fibers and in fibers collapsed. After that, the variation of the thickness for higher compression was small due to compression of fibers. We found that the resin-coat layers did not have little effect on compressive stiffness (variation of compressive stress/variation of thickness)

DOI： 10.1299/jsmemecjo.2004.1.0_285

CiNii Books

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1299/jsmea.46.163

Web of Science

Scopus

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

DOI： 10.1299/jsmezairiki.2003.0_387

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

DOI： 10.1299/jsmezairiki.2003.0_385

CiNii Books

researchmap

記述言語：英語   掲載種別：研究論文（国際会議プロシーディングス）  

DOI： 10.4028/www.scientific.net/msf.426-432.1985

Web of Science

Scopus

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

DOI： 10.1299/jsmezairiki.2003.0_115

CiNii Books

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1002/app.11206

Web of Science

Scopus

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1002/app.11208

Web of Science

Scopus

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

DOI： 10.1299/jsmezairiki.2002.0_289

CiNii Books

researchmap

記述言語：英語   掲載種別：研究論文（学術雑誌）  

DOI： 10.1243/146442002320139289

Web of Science

Scopus

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

In the present study, we discuss the curing state effect of the epoxy resin (DGEBA) on the temperature-time dependence of the fracture toughness. The glass transition temperature and the fragility parameter are applied in order to represent the curing state of the epoxy resins post-cured under various conditions. It is confirmed, first, that the time-temperature equivalent principle is applicable to the fracture toughness. Then we compare the master curves of the specimens which have the same glass transition temperature and the different fragility. When temperature increases, their master curves of the fracture toughness near the glass transition temperature. The fracture toughness of the specimen with lower fragility increases from lower temperature, but the brittle-ductile temperature is approximately the same regardless the fragility. The result shows these two parameters can be very useful to estimate the time-temperature dependence of fracture toughness of the epoxy resin.

DOI： 10.1299/jsmemecjo.I.01.1.0_465

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

Throwing type fire extinguishing equipment needs to be designed to fracture at the time of collision without fracturing at the time of throwing. In this study, we predict the fracture of fire extinguishing equipment by analyzing the notch root stress using FEM at the time of a collision and the time of throwing. The objective of the present study is to design an optimum notch shape which gives breakable equipment structure at the time of collision, not to be fractured at the time of throwing.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

La_<0.6>Sr_<0.4>Co_<0.2>Fe_<0.8> O_<3-δ>(LSCF) has emerged to be a promising candidate as cathode for solid oxide fuel cells (SOFCs) and as oxygen separation membrane because of its oxygen ion conductivity. The purpose of this study attempts to clarify a variation of oxygen non-stoichiometry in LSCF under axial compression. An electrochemical cell consisting of YSZ (yttria stabilized zirconia)/LSCF/YSZ with glass sealing is prepared, which is examined using oxygen coulometric titration. The change in oxygen nonstdichiomery obtained in this experiment wa by two order smaller than the literature value. Theoxygen nonstoichiometry increases with the applied stress, wich could be due to an enlargement of effective contact area between YSZ/LSCF.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

La_<0.6>Sr_<0.4>Co_<0.8>Fe_<0.2>O_<3-δ>(LSCF) is expected to be applied as an oxygen separation membrane and cathode for solid oxide fuel cell (SOFCs) because of its oxygen ion conductivity. In particular, the oxygen ion conductivity of LSCF is an important characteristic that determines the performance of the device. Meanwhile, LSCF in practical use involves a thermal and chemical strain-stress due to temperature and oxygen partial pressure changes; therefore, it is concerned influence of the ionic conductivity. In the present work, polarization-depolarization tests of 8YSZ/LSCF/8YSZ cell under uniaxial compression loading were conducted and effects of stress on the ion-conducting were investigated. Although a clear correlation was not obtained for load stress dependency of the depolarization curve and chemical diffusion coefficient, the oxygen-ion conductivity/electronic transport number was found to increase as the applied stress increases.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

The measurements of photovoltaic performances of a single crystalline silicon solar cell module subjected to thermal loading are performed. The current vs voltage (I-V) relations under dark environment, dark I-V characteristics, of the modules are measured before and after loading. The specimens are observed using an optical microscope and an ultrasonic scanning microscope to investigate the initiation and growth of cracks in silicon cells, de-bonding at the cell/glass interface and cracks in the substrate.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

Lanthanum-based perovskites has emerged to be a promising candidate as cathode for solid oxide fuel cells (SOFCs) and as oxygen separation membrane. With regard to mechanical properties, anomalous behavior, known as ferroelasticity, has been reported in recent years. Systematical and experimental investigation relates to ferroelastic material has not been conducted to date. In the present study, we conducted X-ray diffraction (XRD), observing crystal surface with scanning electron microscope (SEM) and uniaxial compression test in room temperature to discover relation between lanthanum-based perovskites and addition ion. Both rhombohedral crystal and orthorhombic crystal perovskites showed ferroelasticity, but orthorhombic crystal showed slightly. With regard to rhombohedral crystal perovskites, when crystal lattice distortion (cubic based) is large, critical stress is higher value, residual strain is large.

CiNii Books

researchmap

記述言語：英語   出版者・発行元：一般社団法人日本機械学会  

CiNii Books

researchmap

記述言語：英語   出版者・発行元：一般社団法人日本機械学会  

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

A new method is proposed to detect a tilted/deflected planar flaw on the back surface of a plate using the interference of ultrasonic waves. Parameters for flaw evaluation are developed and examined through experimental results for artificial flaws. The distingwish of the tilted/deflected flaw is estimated by parameter, which shows the difference in the first minimum amplitude of the interference fringe. The effect of tilt angle of the flaw on parameter, which indicates the amount of asymmetry of the interference fringe along the direction normal to the flaw, is investigated. Tilted angle larger than 10 degree can be identified from the deflected flaws using the present method with a tilt angle of from the normal direction of the inspection surface.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

De-bonding stress between SiC particle and Aluminum matrix is studied with cast hybrid Metal Matrix Composite (MMC) with SiC particles and Al2O3 whiskers. A notch is machined in the MMC sample and a wedge is inserted into the notch to introduce a crack. Raman spectrum of a SiC particle ahead ofthe crack is observed along with the crack growth. The crack growth is also observed by an optical microscope. The peak frequency of Raman spectrum increases when the crack grows over the SiC particle.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

Whisker occurs on the silver contact surfaces of signal relays under repeated use, thereby causing a short circuit. The whisker formation mechanisms of silver contacts were studied under cyclic sliding conditions. The dependency of whisker length on the sliding distance and contact stress was investigated experimentally. Surface shear deformation due to cyclic sliding contact was simulated to develop the prediction method for the whisker growth.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

Ba_<0.5>Sr_<0.5>Co_<0.8>Fe_<0.2>O_<3-δ>(BSCF) has emerged to be a promising candidate as cathode for solid oxide fuel cells (SOFCs) and as oxygen separation membrane because of its high electronic and ionic conductivity. On the other hand, an anomaly in mechanical behavior around room temperature has been pointed out. The present study investigated the mechanical behavior of BSCF at room temperature. An unusual strain oscillation was observed in the temperature range from 273 K to 303K. Elastic modulus significantly decreased from 80GPa to 60GPa over the room temperature. The linear expansion coefficient peaked at 17μK^<-1> around 350K.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

Ba_<0.58>Sr_<0.4>Co_<0.2>Fe_<0.8>O_<3-δ> (BSCF) has been developed as oxygen separation membrane because of its high electronic and ionic conductivity. I BSCF membrane in service could be subjected to thermal and chemical stresses due to gradient of oxygen partial pressure and temperature through the membrane. Therefore, the stress effect on the separation performance has been an issue of concern. In this study, we investigate d the electrical conductivity of BSCF under compressive loadings at various temperatures. It was found that the electrical conductivity increases with increasing the stress, which can be attributed to piezoresistivity. The piezoresistive effect at room temperature was smaller (〜0.6%) than compared to the ones at the elevated temperatures (〜1.5%), which might be related to the the elastic modulus.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

La_<0.58>Sr_<0.4>Co_<0.2>Fe_<0.8>O_<3-δ> (LSCF) has emerged to be a promising candidate as cathode for solid oxide fuel cells (SOFCs) and as oxygen separation membrane because of its oxygen ion conductivity; however, it has been reported that performance degradation can be caused by Sr segregated on surface of LSCF during practical operation at elevated temperature. The present study investigated the Sr surface segregation in LSCF annealed under uniaxial compression. The surface segregation of Sr-rich phase was observed, especially on the grain boundaries. The size of the segregation particle increases with increasing the annealing time, whereas its number has no clear dependence on the annealing time. The particle size is larger but the number is smaller in the sample annealed under compression than in the one annealed without compression, which could be attributed to grain-boundary sliding and stress-enhanced Sr-diffusion aiding high-temperature creep deformation.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

For attractive mixed ion-electronic conduction properties and also magnetic properties, lanthanum cobalt oxides are expected to be applied in various fields, such as cathode of solid oxide fuel cells, oxygen separation membrane, and magnetic material. With regard to mechanical properties, anomalous behavior around room temperature, known as fentelasticity, has been reported in recent years. In the present study, we conducted uniaxial compression tests of La_<0.6>Sr_<0.4>Co_<0.8>Fe_<0.2>O_<3-δ> (LSCF) in the temperature range from 83 K to 543 K. The results demonstrated that LCO and LSCF exhibit ferroelastic behavior all the temperatures. The variation of the stress-strain curve with temperature was greater for LSCF than for LCO. The elastic modulus of LSCF slightly increases from 83 K to 273 K but drastically decreased around 273 K, which was higher than the one of LCO in the whole temperature range.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

Solid oxide fuel cell (SOFC) has been attractive as a way to solve global energy and environmental problems. Yttria-stabilized zirconia (YSZ) is mainly used as the electrolyte of SOFC. Its conductivity is strongly related with the power performance of SOFC. In the present study, we built an experimental device for four-point bending test to examine effect of stress on Raman spectrum of YSZ. The Young's modulus and the strength measured by the built device decreased with increasing the yttria concentration from 3 to 14. The Raman spectra of 8YSZ showed no change when the applied tensile stress was increased up to 160 MPa.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

A new method is proposed to detect a tilted planar and deflected flaws on the back surface of a plate using the interference of ultrasonic waves. Parameters for flaw evaluation are developed and examined through experimental results for artificial flaws. The effect of tilt and deflect angles (0°〜30°) of the flaw on parameter ΔΔ_<max>, which indicates the amount of asymmetry of the interference fringe along the direction normal to the flaw, is investigated.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

Elastic interaction between vacancies at oxygen sites and external loads in cubic zirconia crystal is analyzed using a point force array model based on the Green function method. The point force array model is proposed as point forces acting on the neighboring atoms of the oxygen vacancy along the displacement direction due to the existence of the vacancy. The Green function for the cubic anisotropic media is numerically calculated. The point force array is calibrated by comparing the displacement field due to the vacancy in the continuum mechanics and the first principle calculation in the least square sense. Anisotropy of the elastic interaction between vacancies and external loads is illustrated graphically and examined.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：燃料電池開発情報センター  

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

The purpose of this study is to bring out strain effects on outputs of polycrystalline silicon solar cells. Strains on crystalline silicon change the bandgap which relates to the open circuit voltage of solar cells. Strains are added by putting a load on a specimen. Strains are evaluated by the stress analysis using Finite Element Analysis and the measurement using strain gauges. The specimen was designed which can deliver 0.21 % tensile and compressive strain on the solar cells. In order to deliver strains on a base plate to solar cells, A7075-T651 was chosen as the base plate material. The base plate and solar cell modules were bonded by an epoxy adhesive. 1-V characteristics of the specimen were measured by exposing incandescent light to the specimen and the maximum output of the specimen was calculated. The maximum output of the specimen decreases 21 % with 0.126 % tensile strain.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

Elastic interaction between vacancies at oxygen sites and external loads in cubic zirconia crystal is analyzed using a point force array model based on the Green function method. The point force array model is proposed as point forces acting on the neighboring atoms of the oxygen vacancy along the displacement direction due to the existence of the vacancy. The Green function for the cubic anisotropic media is numerically calculated. The point force array is calibrated by comparing the displacement field due to the vacancy in the continuum mechanics and the first principle calculation in the least square sense. Anisotropy of the elastic interaction between vacancies and external loads is illustrated graphically and examined.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人 日本機械学会  

DOI： 10.1299/kikaia.78.945

Scopus

researchmap

記述言語：英語   出版者・発行元：一般社団法人日本機械学会  

Elastic interaction between vacancies at oxygen sites in cubic zirconia crystal is analyzed using a point force array model based on the Green function method. The point force array model is proposed as point forces acting on the neighboring atoms of the oxygen vacancy along the displacement direction due to the existence of the vacancy. The Green function for the cubic anisotropic media is numerically calculated. The point force array is calibrated by comparing the displacement field due to the vacancy in the continuum mechanics and the first principle calculation in the least square sense. Anisotropy of the elastic interaction between vacancies is illustrated graphically and examined.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

The present study reports the bending strength and elastic modulus from room temperature to 1000℃ of 9mol% scandia stabilized zirconia(9ScSZ), which can be used as electroyte for solid oxide fuel cells. The bending strength and elastic modulus of 9ScSZ greatly decreased to 500℃ while they increased slightly above 500℃. Moreover, the observation of the fracture surface tested at different tempreatures demonstrated that the fracture mode has generally changed from the intergranular fracture to the transgranular fracture with the temperature increase.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

In this study the interface effect on the location dependence of the crack growth characteristics by fatigue of an aluminum cast alloy locally reinforced by Al_2O_3 whiskers and SiC particles is studied experimentally. The crack grows normal to the interface between the metal matrix composite (MMC) and the aluminum alloy. The crack growth rate under a constant stress intensity factor range condition showed deceleration with crack growth in MMC. The residual stresses due to casting of the layered material of MMC and aluminum alloy were measured using the strain release method. The deceleration of crack growth rate can be attributed to the compressive residual stress in MMC. The mechanical effect of residual stress on the stress intensity factor of a crack normal to the MMC/aluminum alloy interface is evaluated based on the principle of superposition.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

Strain range controlled low-cycle fatigue tests were conducted using ultrasonic method in order to compare the state of the damage and the ultrasonic response of the STS410 and SUS316NG, and clarify the effectiveness in STS410 of this measuring method and clarify the range of frequency in which fatigue damage can be detectable using the ultrasonic back reflection. It was clarified that for the STS410 the crack growth start can be predicted according to the ultrasonic back-reflection intensity. An applicable limit in frequency is considered to exist between 20MHz and 50MHz for the present detection condition. This result can be used to predict the remaining life before the onset of crack growth within the plastic strain range used in this study and contributes the safety.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

The oxygen-ionic conductivity of yttria stabilized zirconia electrolyte subjected to the tensile and compressive stress was investigated in the present study. 14mol%-yttria stabilized zirconia single crystal specimens were prepared. The tensile was applied in parallel to the crystal axes of the <100> and <110> directions at various temperatures and the compressive was perpendicular to the crystal axis of that. The applied tensile and compressive stresses in both directions clearly increased the ionic conductivity. The improvement of the conductivity was large especially when the stress was applied in the <100> direction and also at lower temperatures.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

The 8mol% yttria stabilized zirconia (8YSZ) has been attractive as one of electrolyte materials for solid oxide fuel cell (SOFC). It has been widely known that there is hundreds MPa of internal stress existing in SOFC electrolyte, which could deteriorate electrolyte during the operation of SOFC. The purpose of the present study is to clarify the stress effect on the degradation of the 8YSZ electrolyte. The compressive stress of about 200 MPa was applied to the 8YSZ specimens, and then they were annealed at 1173〜1263 K for 0〜1000 h. The crystal structure and the conductivity of the specimens were examined before/after the annealing by conducting Raman spectroscopic analysis, impedance measurement, and observation with a scanning electron microscope (SEM). The conductivity of the specimen subjected to the compressive stress showed a initial drop during annealing, although there was no clear effect of the stress on the decreasing rate of the conductivity and also the crystal structur after annealing.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

The layered metal materials (clad) could include various defects at the interface such as delaminations , which can be introduced during rolling and thermal treatment processes. Therefore non-destructive inspection in the manufacturing process becomes important, and the method which is able to partially evaluate a long sheet in a manufacturing process is necessary. Although the the resonant ultrasound spectroscopy (RUS), has been widely applied to inspect individual samples, it has never been applied for a partial evaluation of continuum The aim of this study is to develop the evaluation system for long sheet using the RUS. The experimental setup which measures a partial resonance characteristic of long sheet is built up, and its validity as an inspection system is discussed.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

In the present study, the oxygen diffusion in 4, 8, and 14 mol%-yttria-stabilized zirconia (4, 8, and 14YSZ) subjected to the uniaxial stress in the [100] direction is investigated by the molecular dynamics simulation. The directional oxygen diffusion in 4YSZ and 8YSZ is facilitated in the tensile direction and deteriorated in the compressive direction without changing the total diffusion property, which could be caused by the elastic recovery force. For 14YSZ, on the other hand, the oxygen diffusion remains unchanged regardless of the stress, probably due to the high yttria concentration. The tensile stress component in the <100> direction, therefore, could facilitate the oxygen migration in ytfxia-stabilized zirconia with the lower yttria concentrations.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

In this study the interface effect on the location dependence of the crack growth characteristics by fatigue of an aluminum cast alloy locally reinforced by Al_2O_3 whiskers and SiC particles is studied experimentally. The crack grows normal to the interface between the metal matrix composite (MMC) and the aluminum alloy. The crack growth rate under a constant stress intensity factor range condition showed deceleration with crack growth in MMC. The residual stresses due to casting of the layered material of MMC and aluminum alloy were measured using the strain release method. The deceleration of crack growth rate can be attributed to the compressive residual stress in MMC. The mechanical effect of residual stress on the stress intensity factor of a crack nonnal to the MMC/aluminum alloy interface with residual stress field is evaluated based on the principle of superposition.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

The relationship between the medium range structure and the mechanical properties of the silica glass under various hydrostatic pressure is investigated by the molecular dynamics simulation. The bulk modulus and the density of silica glass at high pressure was increased while the ringsize was decreased The density and bulk modulus strongly depend on the ringsize. The 3 and 4-membered rings have much higher modulus than the 5,6-membered rings.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

The oxygen-ionic conductivity of yttria stabilized zirconia electrolyte subjected to the tensile stress was investigated in the present study. 14mol%-yttna stabilized zirconia single crystal specimens were prepared. The tensile stress was applied in parallel to the crystal axes of the <100> and <110> directions at various temperatures. The applied tensile stress in both directions clearly increased the ionic conductivity. The improvement of the conductivity was large especially when the stress was applied in the <100> direction and also at lower temperatures.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

The objective of present study is to develop an evaluation method of low cycle fatigue damage of two kinds of steel using ultrasonic back reflected wave. Anisotropy of back reflection intensity from the surface due to prefer direction of small fatigue cracking was measured. It was found that the anisotropy of back reflection intensity reflects the damage accumulation through the crack density developed by low cycle fatigue loadings.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人 日本接着学会  

DOI： 10.11618/adhesion.46.222

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

Simultaneous measurement of the nanoprobe indentation force and the photoluminescence of InGaAs/GaAs quantum dots is successfully achieved by introducing a specially designed loadcell into the nanoprobe indentation system. By using this improved system, the emission properties of self-assembled InGaAs/GaAs quantum dots (QDs) under cylindrical nanoprobe indentation are investigated under low temperature and high vacuum conditions. Energy shifts as large as 100 meV induced by cylindrical nanoprobe indentation are observed in the QDs. Further, the increase in the emission energy of the QDs varies from peak to peak under the same indentation force. In order to clarify this mechanism, simulations are carried out based on a three-dimensional fmite element and six-band strain-dependent k*p Hamiltonian. The simulation results are in good agreement with the experimental ones. The results of the cylindrical nanoprobe indentation experiments show that the effect of nanoprobe shape on indentation-photoluminescence characteristics is significant.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

In this study the hybrid effect on the orientation dependence of the composite strength of an aluminum cast alloy reinforced by AL_2O_3 whiskers and SiC particles is studied experimentally and numerically. The monotonic strength is higher when the hybrid MMCs is subjected to the external load parallel to the random whisker orientation in plane than those when the load is perpendicular to the whisker orientation. The whisker orientation dependence of composite strength in the hybrid composite is weaker than the one in the whisker reinforced composite. On the fracture surface of the specimen loaded along parallel direction to the random whisker orientation in plane broken whiskers are the majority while a lot of de-bonded interfaces between whisker and matrix are observed on the fracture surface of the specimen loaded along perpendicular direction to whisker orientation. To characterize the hybrid effect on the whisker orientation dependence of composite strength, a three-dimensional hybrid composite unit cell model including whiskers and particles is developed using finite element method.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

Sol-gel method can produce novel materials such as nano-porous structure, thin-film, and organic-inorganic hybrid materials. The purpose of the present study is toclarify the relationship between the microstructure and the mechanical properties of the sol-gel silica glass. H_4SiO_4 molecule was modeled and then the sol-gel reaction process was simulated by the molecular dynamics simulation. The microstructure and the elastic properties of the prepared model was analyzed.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

Solid-oxide fuel cells(SOFC) are expected to be one of the most effective and clean energy sources because of their highest efficiency and simple system, SOFC is consisted of three layered structures: anode, electrolyte and cathode. In order to guarantee their long-term durability, it is important to comprehend stress state in the cell. In this study, the residual stress is evaluated by using X-ray diffraction and also a method of resonant ultrasound spectroscopy (RUS). The residual stress in the electrolyte of the anode-supported cell measured by X-ray diffraction was a compressive stress of about 675MPa. Based on the results, the residual stress distribution in the cell was simulated using the finite element method, followed by the modal analysis. The natural frequency of the cell decreased by 0.84 % when the simulated compressive stress in the electrolyte increased to about 526 MPa, which could suggest a validity of the RUS for evaluating the residual stress in the cell.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

Solid oxide fuel cell (SOFC) has been attractive as a way to solve global energy and environmental problems. As the SOFC has layered structure consisting of different materials, there is significant residual and thermal stresses produced during sintering process and operating, which could affect the power performance of the SOFC. hi the present study, the effect of the stress on the ionic conductivity of 8 mol% yttria-stabilized zirconia electrolyte has been investigated by molecular dynamic simulation, allowing for the direction of the crystal axis. The results show that there is an optimum stress state for the oxygen migration.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

Layered metal materials which consist of more than two kinds of metals can have great properties by taking advantage of good property of each metal material. The layered metal materials, however, could include various defects at the interface such as delamination and weak interface stiffness, which can be introduced during rolling and thermal treatment processes. The interface defects could accordingly deteriorate the properties of layered metal materials. Thus, it is important to non-destructively evaluate the interface property before its practical application. In this study, by using a method of resonant ultrasound spectroscopy (RUS), the delamination and the stiffness at interface between two copper sheets are evaluated. The modal analysis is conducted by the finite element method and the resonant frequency is measured by the RUS system.

CiNii Books

researchmap

記述言語：英語   出版者・発行元：一般社団法人日本機械学会  

The objective of present study is to develop an evaluation method of low cycle fatigue crack growth from PSBs of stainless steels using ultrasonic back reflected wave. Behavior of back reflection intensity change from the surface due to fatiguing was measured. It was found that the back reflection intensity decreased linearly before the start of fatigue crack growth from PSBs as the number of cyclic loads was increased. The linearly approximated relationship can predict the remaining life to start crack growth conservatively.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

セルがライン状に充填されたハニカム構造体の面内圧縮挙動を有限要素解析により明らかにした.充填されたセルはライン状に配置されており,ハニカム構造体はライン状に配置された充填セルによって複数のセル領域で構成される.ハニカム構造体が圧縮されるとそれぞれのセル領域は独立に変形し,その結果,面内圧縮挙動に充填セルの影響が生じた.ライン状の充填セルを持つハニカムモデルの衝撃エネルギ吸収量は,充填されていない場合よりも増加することが明らかとなった.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

ナノ粒子が充填された複合材料の破壊靭性値に対して複合則の検討を理論的に行った.3種類の粒径の球状シリカ粒子を様々な含有率で充填したエポキシ樹脂の破壊靭性値の測定を行い,破壊靭性値が粒径および粒子の体積含有率に依存していることを確認した.複合材料の破壊靭性値を解析モデルにより考察し,粒子の直径の平方根および等価介在物法により求められる母材の正規化された平均応力のそれぞれの逆数に対して線形的に複合材料の破壊靭性値が変化することを求め,実験結果と比較することにより,その妥当性を確認した.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

Ti-Ni形状記憶合金を対象に,相変態挙動を伴う非弾性変形挙動を記述する構成式モデルを開発した。モデルにおいては,材料の物質点が種々の方位を向いた微視結晶粒からなり,それぞれの微視結晶粒のひずみは物質点のひずみに等しいという等ひずみモデルで記述されるものとしている。そして,それぞれの結晶粒の変態システムにおける分解せん断応力が限界値に達すると,変態・逆変態および変態の再分布が生じるとする。このようにして扱うことにより,変態に際して働くアコモデーション機構を再現することができる。構成式は,応力および温度誘起変態・逆変態を扱うことができ,多軸応力状態での形状記憶挙動および超弾性挙動を記述できる。

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

ボールはんだで構成される(Ball-Grid-Array: BGA)はんだ接合部の衝撃引張強度を測定するための振り子式衝撃試験装置の開発し,様々な荷重速度ではんだ接合部に衝撃力を与えることを実現した.衝撃荷重の時間変化を測定するとともに試験片のはんだ接合部の断線する時間を測定することにより,断線を生じるはんだ接合部の衝撃強度および機械的接合が失われる衝撃強度を評価することができる.実験を行い試験装置の有効性を確認するとともに,衝撃の負荷速度とはんだ接合部の衝撃強度との関係を明らかにした.

CiNii Books

researchmap

記述言語：英語   出版者・発行元：社団法人日本機械学会  

rights: 社団法人日本機械学会rights: 本文データは学協会の許諾に基づきCiNiiから複製したものであるrelation: IsVersionOf: http://ci.nii.ac.jp/naid/110006666286/

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

CiNii Books

researchmap

記述言語：日本語   掲載種別：記事・総説・解説・論説等（商業誌、新聞、ウェブメディア）   出版者・発行元：燃料電池開発情報センター  

researchmap

記述言語：日本語   出版者・発行元：埼玉大学総合研究機構地域オープンイノベーションセンター  

Solar cells have been an attractive way to solve global energy and environmental problems so it have been commercially developed for decades. Among various solar cells, the one based on polycrystalline silicon wafer has been commonly used; however, the polycrystalline silicon wafer normally contains many mechanical defects such as cracks, chippings, holes, and dimples, which could deteriorate the performance of the solar cells.In the present research, the defects in polycrystalline silicon wafer are non-destructively investigated by a method of resonant ultrasound spectroscopy. The results of the modal analysis and the measurement of resonant frequency suggest an availability of the present method for the defect inspection.

researchmap

その他リンク： http://sucra.saitama-u.ac.jp/modules/xoonips/detail.php?id=KY-18838278-28

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

In this study, soil effect on mechanical and morphological properties of Hiba (Thujopsis dolabrata) root was investigated concerning growth of seedling. Seedlings brought up in different soils for two years were used as samples. Tensile test and image analysis were performed to measure mechanical and morphological properties of the roots. As a result, effect of the upbringing soils was clarified from these properties of the roots. The tensile strength and the fracture load for the center region of the cross section were found to be dependent on the soil. The fractal dimension of the root, the total root length, and the number of the root tip were also found to be related to the soil environment.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

In this study, RUS(resonant ultrasound spectroscopy) is suggested as a measurement method of residual stress in spherical specimens. At first, the model of spherical specimen is made for FEM and natural frequency of spherical specimen is calculated due to use this FEM model. Second, resonant frequency of spherical specimen is measured for RUS measurement system that consists of two transducers, spectrum-analyzer, and load cell. RUS is the measurement system due to compare calculated natural frequency for FEM with measured resonant frequency for experiment. As these results, calculated natural frequency is similar change to measured resonant frequency when residual stress is changed. So, RUS can be measured residual stress.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

In recent years, it has been reported that organic/inorganic hybrid composites could show novel mechanical properties. In this study, viscoelasticity of epoxy/silica hybrid composites prepared with the acid anhydride curing agent viasol-gel method were investigated. The structure of hybrid composites was evaluated by Raman spectroscopic analysis. Dynamic modulus and glass transition temperature of the hybrid composites were measured by dynamic mechanical thermal analyzer.The DMTA results showed that the hybrid composites exhibited a thermoplastic behavior.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：日本機械学会  

We investigated the mode II fracture toughness with time and temperature dependence of the bisphenol A-type of epoxy resin. We performed an asymmetric four-point bending test under various conditions of temperature and displacement rate. We found that the mode II fracture toughness strongly depended on the displacement rate and the temperature, even at the room temperature. Moreover, it was governed by the time-temperature equivalence principle in regard to the fracture time. The time-temperature dependency of the mode II fracture toughness was similar to that of the loss modulus E" and the transition of brittle to ductile fractures occurred nearly simultaneously when E" peaked

CiNii Books

researchmap

記述言語：日本語   掲載種別：記事・総説・解説・論説等（学術雑誌）   出版者・発行元：合成樹脂工業協会  

エポキシ樹脂の微視的構造と破壊靭性値の関係について, 筆者らのこれまでの研究を中心に紹介する。エポキシ樹脂の微視的構造について, その架橋反応度と不均一性に着目し, 熱粘弾性特性から得られる二つのパラメータ : ガラス転移温度とフラジリティにより定量化する方法を示す。モードI破壊靭性値に対して室温でのガラス状態においてだけでなく, 温度および時間依存性と微視的構造との関係について述べ, シリカ粒子を充填したエポキシ複合材料についても説明する。さらに, モードII, 混合モードI/II破壊靭性値についても言及する。

DOI： 10.11364/networkpolymer1996.26.167

CiNii Books

researchmap

その他リンク： https://jlc.jst.go.jp/DN/JALC/00256680667?from=CiNii

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

The effect of transverse impact on buckling behavior of a column under axial impact loading is numerically investigated by finite element analysis. A column under an axial impact was subjected to a transverse impact to reduce its structural stiffness instantaneously. The transverse impact generates buckling with low critical load and improves energy absorption. The transverse impact has a significant effect on inducing plastic buckling. The results show that the transverse impact applied almost simultaneously with axial impact gives highest energy absorption. The simulation results prove the experimental ones qualitatively and show that the energy absorption of column is improved without reducing column stiffness beforehand.

CiNii Books

researchmap

記述言語：日本語   出版者・発行元：一般社団法人日本機械学会  

CiNii Books

researchmap