Proceedings of the Korean Society for Technology of Plasticity Conference (한국소성가공학회:학술대회논문집)
- 2003.10a
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- Pages.148-151
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- 2003
Incorporation of Sheet Forming Effects in Crash Simulations Using Ideal Forming Theory and Hybrid Membrane/shell Method
이상공정이론 및 하이브리드 박막/쉘 방법을 이용한 박판성형품의 충돌거동 해석
Abstract
In order to achieve reliable but cost-effective crash simulations of stamped parts, sheet forming process effects were incorporated in simulations using the ideal forming theory mixed with the 3D hybrid membrane/shell method, while the subsequent crash simulations were carried out using a dynamic explicit finite element code. Example solutions performed for forming and crash simulations of I- and S-shaped rails verified that the proposed approach is cost-effective without sacrificing accuracy. The method required a significantly small amount of additional computation time, less than 3% for the specific examples, to incorporate sheet forming effects to crash simulations. As for the constitutive equation, the combined isotropic-kinematic hardening law and the non-quadratic anisotropic yield stress potential as well as its conjugate strain-rate potential were used to describe the anisotropy of AA6114-T4 aluminum alloy sheets.
Keywords
- Crashworthiness;
- Ideal Forming;
- Hybrid Method;
- Isotropic-Kinematic Hardening;
- Non-Quadratic Anisotropic Yield Potential and Strain-Rate Potential