Proceedings of the Korean Society for Technology of Plasticity Conference (한국소성가공학회:학술대회논문집)
- 2006.05a
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- Pages.199-202
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- 2006
Computer Simulation of Hemispherical Forming Process Texture-based Work hardening and Anisotropy
집합조직 기초 가공경화와 이방성에 의한 반구 성형공정의 전산 시뮬레이션
Abstract
The hardening and anisotropy based on the crystal plasticity is considered in the numerical simulation of hemispherical sheet forming process to find more realistic simulation results For calculating the yield shear stresses of each crystal, Taylor's model of the crystalline aggregate is employed. The yield stress of crystalline aggregate is computed by averaging the yield stresses of the crystal. The hardening is evaluated by using the Taylor factor and the critical resolved shear stress of the crystal. In addition, by observing the crystallographic texture and slip system, the anisotropy of the sheet is traced during the forming process. The anisotropy and hardening behaviors of the sheet found by the crystal plasticity are described better than those of obtained from the Hill's quadratic criterion based on the continuum plasticity.
Keywords
- Crystal Plasticity;
- Texture Evolution;
- Sheet Metal Forming;
- Work Hardening;
- Anisotropy;
- Taylor Factor