材料结构参数对薄板冲压成形仿真结果的影响

Study On Sensitivity of Material Constitutive Parameters

采用不同材料屈服模型及参数对典型冲压过程进行了仿真 ,对仿真结果进行了分析。分析表明材料模型及参数对仿真结果影响至关重要 ,板料的厚度分布及成形极限图对结构参数n和r值很敏感。

Material constitutive model plays a very important role in sheet material forming simulation and analysis.In this study,different yield criteria are evaluated in the stamping simulation of a typical sheet metal part,and their influence on the forming results are analysized.It is found that the forming results depend on the yield criteria.The thickness distribution and FLD diagram also are sensitive to material parameters n and r. It is helpful on how to select a material type and its parameters.