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Influence of equivalent drawbead model to springback prediction
Author(s): 
Pages: 88-91
Year: Issue:  6
Journal: JOURNAL OF PLASTICITY ENGINEERING

Keyword:  回弹仿真等效拉延筋模型;
Abstract: 等效拉延筋模型是影响回弹预测结果的一个重要因素.结合拉延筋试验、拉延筋试验的仿真以及拉深的仿真,研究了等效拉延筋模型对回弹预测结果的影响.结果显示,板料经过拉延筋后,出现材料硬化、变薄,并且有因横截面应力形成的力矩;仿真中采用等效拉延筋模型时,对板料经过拉延筋后出现的这些现象都不能准确地模拟.板料的硬化、在板料横截面的力矩,对工件的回弹预测结果影响显著.板料的横截面力矩的准确描述,对回弹预测的精度尤其重要.为了提高回弹的预测精度,有必要提出修正的等效拉延筋模型.
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