基于GTN损伤模型对含边部缺陷硅钢薄板冷轧时边裂的预测  

Prediction for Edge Cracking for Silicon Steel Sheet with Edge Defect during Cold Rolling Based on GTN Damage Model

作　　者：孙权[1] 闫玉曦[1] 陈建钧[1] 潘红良[1] 

机构地区：[1]华东理工大学机械与动力工程学院,上海200237

出　　处：《机械工程材料》2013年第1期93-97,共5页Materials For Mechanical Engineering

基　　金：国家自然科学基金资助项目(51105143);中央高校基本科研业务资助项目(1114036);上海高校青年教师培养资助计划(YG0142129)

摘　　要：采用拉伸试验和显微组织观测的方法确定了GTN损伤模型中的9个损伤参数,运用GTN损伤模型对冷轧硅钢薄板边部缺陷的扩展及边裂的产生进行了有限元模拟,并与预置缺口的钢板轧制试验进行对比。结果表明:轧制过程中边部缺陷是造成钢板边部裂纹萌生和扩展的一个重要原因,GTN损伤模型可用来预测含边部缺陷硅钢薄板在冷轧过程中边裂的产生;预测结果与试验结果基本一致。The crack initiation and propagation of silicon steel strip with edge defect during cold rollingprocess was studied by using GTN damage model in this paper. Nine damage parameters in GTN model were identified by tensile testing and microstructure observing, and then the FE simulation of edge defect evolution ofsilicon steel strip during rolling process was conducted on the base of GTN damage model, and then the results were compared with rolling experimental results. The results show that the edge defect was a important reason for edge-crack initiation and propagation, and GTN damage model could be used to predict the occurrence of edge-crack of steel strip with edge defect during cold rolling process. The predicted results matched the experimental ones.

关 键 词：GTN损伤模型 损伤参数 冷轧 硅钢薄板 边部缺陷 

分 类 号：TG335[金属学及工艺—金属压力加工]