多孔質材のブリネル硬さ試験に関する研究

概要

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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.
一般社団法人日本機械学会の論文
1998-08-25