3次元剛塑性 FEM コードの開発と摩擦・破壊問題への応用

概要

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In order to verify the accuracy regarding contact and friction, the two-dimensional (2D) penalty rigid-plastic FEM program (which was developed in previous reports) is applied to the ring compression problem. Then a 3D FEM code is developed by extension of this program. Using this code, the fiat-tool compression and spherical punch indentation of a block of various materials under various friction conditions are carried out. At the same time, the occurrence of fracture and change of relative density during deformation are inspected by using the Oyane's ductile fracture criterion and the change of relative density calculated by this code. From the results. this code is confirmed to be effective. Furthermore. it is shown that fracture is dependent on the forming type, material and friction condition, and that the prediction of fracture from the trivial change of relative density is possible using this code in which compressibility is not taken into account.
一般社団法人日本機械学会の論文
1997-09-25