한국정밀공학회지 (Journal of the Korean Society for Precision Engineering)
- 제15권5호
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- Pages.167-175
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- 1998
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- 1225-9071(pISSN)
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- 2287-8769(eISSN)
미시적 결정소성학에 의거한 거시적 성형공정 해석
Analysis of Macroscopic Forming Process on the Basis of Microscopic Crystal Plasticity
초록
A mathematical formulation is presented to model anisotropy from the deformation textures developed in a forming process. In this work, a micro-mechanical-based polycrystalline analysis is implemented into a consistent finite element method for the anisotropic, viscoplastic deformation of polycrystalline metals. As suggested by Taylor, the deformation of each grain in an aggregate is assumed to be same as the macroscopic deformation of an aggregate or a macro-continuum point. Algorithms are developed to represent the plastic anisotropy, such as the anisotropic yield surface and R-value, from the predicted deformation texture. As applications, the evolution of texture in rolling, upsetting and drawing/extrusion processes are simulated and the corresponding changes of mechanical properties such as yield surface and R-value are predicted.