HOME    About this site    mypage    Japanese    library    university    Feedback

University of the Ryukyus Repository >
Faculty of Engineering >
Peer-reviewed Journal Articles (Faculty of Engineering) >

 
Title :多孔質材のブリネル硬さ試験に関する研究
Title alternative :A Study of Brinell Hardness Test of Porous Materials
Authors :呉屋, 守章
比嘉, 吉一
宮城, 清宏
末吉, 敏恭
鴇田, 政雄
Authors alternative :Goya, Moriaki
Higa, Yoshikazu
Miyagi, Kiyohiro
Sueyoshi, Toshiyasu
Tokita, Masao
Issue Date :25-Aug-1998
Abstract :The Finite Element Method is applied to the analysis of Brinell hardness test of porous materials. The numerical calculation is performed using four different plastic constitutive rules such as Gurson's rule, Tvergaard's modification of Gurson's rule, Goya-Nagaki-Sowerby's rule and a stereology-based rule that is a modification of Goya-Nagaki-Sowerby's rule. For the investigation of the validity of the rules, the numerical results are compared with experimental data for the porous materials produced by Spark Plasma Sintering method which can product porous materials of higher porosity. From the comparison it is concluded that the numerical results obtained using Tvergaard's modification of Gurson's rule or the stereology-based modification can well predict the experimental results. However, the numerical results deviate from the experimental data for the porous material of higher porosity such as fo=0.3. This deviation is attributed to the fact that the shape of pores in the porous material of fo=0.3 are quite different from the sphere that is a fundamental assumption in developing constitutive rules.
Type Local :雑誌掲載論文
ISSN :03875008
Publisher :日本機械学会
URI :http://hdl.handle.net/20.500.12000/256
Citation :日本機械学会論文集. A編 = Transactions of the Japan Society of Mechanical Engineers. A Vol.64 no.624 p.82 -88
Appears in Collections:Peer-reviewed Journal Articles (Faculty of Engineering)

Files in This Item:

File Description SizeFormat
sueyoshi_t02.pdf694KbAdobe PDFView/Open