摘要
研究了液压橡皮囊成形工艺(简称橡皮成形)数值模型建立的方法。基于对橡皮的不同处理方法,提出橡皮成形工艺的三种有限元模型,并应用到直弯边成形的分析中。讨论了橡皮对板料变形流动的影响,认为橡皮垫在成形过程中能起到减小回弹的作用。利用不同弯曲半径的直弯边回弹实验数据,比较了几种简化方式在回弹预测上的准确性,发现采用壳单元描述橡皮垫的模型的回弹预测结果与实验结果相比,误差较小,同时计算效率高。
This paper is focused on the finite element model for rubber forming process.Based on different descriptions of the rubber pad,three kinds of numerical models were put forward for rubber forming and applied in the analysis of straight flanging process.Through the discussion about effect of rubber pad on the sheet deformation,it is concluded that rubber pad plays as a significant part in decreasing springback.Accuracy of the three models was compared,using experimental and predicted springback data of different bending radius.It is found that the method that describes rubber pad as shell elements can bring the springback analysis less errors and higher efficiency.
出处
《中国机械工程》
EI
CAS
CSCD
北大核心
2009年第19期2382-2386,共5页
China Mechanical Engineering
基金
国家"十一五"国防科技预研重点项目(51318010601)
关键词
橡皮成形
数值模拟
回弹预测
弯边
rubber forming
numerical analysis
springback prediction
flanging
