RIGID PLASTIC FINITE ELEMENT METHOD USING MODIFIED CAM-CLAY MODEL

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  • 修正カムクレイモデルを破壊規準に用いた剛塑性有限要素法について

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In this paper, a rigid plastic finite element analysis of a modified Cam-clay model for the initial plastic yielding under a drained condition is proposed. As a failure criterion of Modified Cam-clay model can be written as a second order cone constraint, the formulation of rigid plastic FEM is based on a second order cone optimization. To check the validity of a formulation, a series of numerical simulations of a cubic specimen with two type of meshes, a coarse mesh (5 elements) and a fine mesh (24 elements), under a drained condition subject to tri-axial compression loading were conducted. Numerical results show good coincidence with the theoretical solutions. In addition, numerical stability and good convergence can been observed. Consequently, it can be concluded that the proposed formulation is reasonable and appropriate.

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