材料模型对成形过程一步法模拟结果的影响

Influence of material models on the “one-step” simulation results in the forming process

采用大变形塑性理论和理想变形假设 ,给出了用于复杂形状拉深件成形过程分析的所谓“一步分析法”的有关公式和有限元表达。在此基础上 ,分别对各向同性刚塑性材料、厚向异性刚塑性材料的复杂形状拉深件成形过程材料应力、应变进行了分析研究 ,对拉深件毛坯初始形状进行了优化 。

According to the large deformation theory and the assumption of ideal forming, the formulae and FE expressions of the one\|step approach, which can be used to analyze the forming process of complex deep drawn parts is presented. Based on this approach and two material models that are of the isotropy rigid\|plasticity material and thickness anisotropy rigid\|plasticity material, the stress and strain distributions in the forming process of a complex deep\|drawn part are fully studied, meanwhile the initial blank of the complex deep drawn part is also optimized.