高强度钢板在双向等曲率模中的成形回弹研究  

Study on springback of high strength steels deformed in equal doubly-curved die

作　　者：廖娟[1] 周驰[1] 阮锋[1] 

机构地区：[1]华南理工大学机械与汽车工程学院,广东广州510640

出　　处：《中南大学学报（自然科学版）》2011年第6期1629-1635,共7页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(50805050);广东高校优秀青年创新人才培育项目(2009N9090180)

摘　　要：针对高强板在双向等曲率模具中的冲压回弹问题进行理论预测及实验研究。在基于塑性膜理论的能量法回弹预测模型中增加考虑弯曲效应对回弹的影响,并采用Khan-Huan本构模型描述高强板的材料应力应变曲线。该解析算法能以较少的计算量获得较为准确的回弹后零件形状。研究结果表明:综合考虑膜效应及弯曲效应后预测的结果比仅考虑膜效应预测模型的预测结果更接近实验值,由该模型预测的2种高强板回弹形状与实际形状的法向平均偏差均小于0.15 mm。The theoretical prediction and experimental study of springback of high strength steel parts deformed in equal doubly-curved die set were investigated.By incorporating Khan-Huan constitutive model into an energy method based on membrane theory of shells,and taking the bending effect into account,the profiles of the parts after springback was predicted with a relatively minor effort of calculation in the design stage.The experiment results show that the profiles predicted by new model agree better with the experimental results than that predicted by the previous model based on membrane theory.The average normal difference between the predicted profiles and the experimental profiles are less than 0.15 mm.

关 键 词：高强钢 回弹 双曲率 能量法 K-H本构模型 

分 类 号：TG386[金属学及工艺—金属压力加工]