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속도 독립성 결정소성모델의 유한요소해석 Finite Element Analysis for Rate-Independent Crystal Plasticity Model

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대한기계학회 대한기계학회 논문집 A권 대한기계학회논문집 A권 제33권 제5호
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447 - 454 (8page)
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속도 독립성 결정소성모델의 유한요소해석
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    초록·키워드

    Rate-independent crystal plasticity model suffers from the non-uniqueness of activated slip systems and the determination of the shear slip rates on the active slip systems. In this paper, a time-integration algorithm which circumvents the problem of the multiplicity of the slip systems was developed and implemented into the user subroutine VUMAT of a commercial finite element program ABAQUS. The magnitude of the slip shears on the active slip systems in f.c.c Cu single crystal aligned with the specific crystallographic orientation was investigated to validate our solution procedure. Also, texture developments under various deformation modes such as simple compression, simple tension and plane strain compression were compared with the results of the rate-dependent model by using the rate-independent crystal plasticity model. The computation time employing the rate-independent model is much more reduced than the those of the ratedependent model.

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      UCI(KEPA) : I410-ECN-0101-2009-550-019527248