• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2017, Vol. 53 ›› Issue (18): 79-86.doi: 10.3901/JME.2017.18.079

• 材料科学与工程 • 上一篇    下一篇

在冷轧过程下XFEM对带钢边部裂纹扩展预测的应用

昝大千, 陈延星, 陈建钧, 潘红良, 王正东   

  1. 华东理工大学机械与动力工程学院 上海 200237
  • 收稿日期:2016-08-02 修回日期:2017-01-03 出版日期:2017-09-20 发布日期:2017-09-20
  • 通讯作者: 王正东(通信作者),男,1950年出生,博士,教授.主要研究方向为石油化工临氢装置的损伤分析、安全评估及延寿技术,高温结构完整性评价的工程方法.E-mail:zdwang@ecust.edu.cn
  • 作者简介:昝大千,男,1990年出生,博士研究生.主要研究方向为冷轧过程带钢断裂失效.E-mail:15216779649@163.com;陈延星,男,1987年出生,硕士研究生.主要研究方向为板料成形.E-mail:yxchenecust@163.com;陈建钧,男,1977年出生,博士,副教授.主要研究方向为材料断裂和损伤机理.E-mail:jjchen@ecust.edu.cn;潘红良,男,1964年出生,博士,教授.主要方向为金属材料断裂机理和表面防护.E-mail:hlpan@ecust.edu.cn
  • 基金资助:
    国家自然科学基金资助项目(51105143,51675182)。

Application of the XFEM to Predict the Edge Crack Propagation of Steel Sheet in the Cold Rolling Process

ZAN Daqian, CHEN Yanxing, CHEN Jianjun, PAN Hongliang, WANG Zhengdong   

  1. Institute of Mechanical and Power Engineer, East China University of Science and Technology, Shanghai 200237
  • Received:2016-08-02 Revised:2017-01-03 Online:2017-09-20 Published:2017-09-20

摘要: 在冷轧过程中,带钢边部容易发生裂纹扩展,严重会造成断带事故,所以预测带钢边部裂纹扩展从而避免断带能够提升生产效率以及产品最终质量,因此,预测方法极为重要。本次研究运用扩展有限元(Extended finite element method, XFEM)模型对边部含有预置缺陷的带钢在冷轧过程中裂纹扩展行为进行预测,采用弹塑性有限元模拟和薄板拉伸试验混合技术以及多试样法断裂韧度试验确定最大主应力准则两个参数,并验证了参数的准确性。采用有限元模拟与冷轧试验对比,通过改变轧制参数,证明XFEM模型对边部含有预置缺陷的带钢在冷轧过程中裂纹扩展行为有很好的预测能力。本次研究还模拟分析压下率以及前、后张力对冷轧过程带钢边部裂纹扩展的影响,结果表明前张力影响效果更明显,同时,压下率越大,裂纹张开位移和裂纹扩展越明显。

关键词: XFEM模型, 边部裂纹扩展, 冷轧, 轧制参数, 最大主应力准则

Abstract: In the cold rolling process, the steel sheet edge easily generates crack propagation, even can cause strip rupture. Thus, predicting edge crack of steel sheet propagation can avoid strip rupture and improve production efficiency and quality, so that the prediction method is extremely important. The extended finite element method (XFEM) model is used to predict the edge crack of steel sheet propagation in the cold rolling process. The two parameters of maximum principle stress criterion (MAXPS) are determined by hybrid technique of elastoplastic finite element method simulation and thin-plate tension test and multiple specimens fracture toughness test, and the accuracy of the two parameters is verified. Comparison of simulation and experiment by changing cold rolling parameters, the results showed that the XFEM model has good prediction ability on crack propagation behavior with edge defect pre-set in the steel sheet in the cold rolling process. Meanwhile, in this research, the effect of different reduction ratios, front and back tension to edge crack propagation are analyzed in the cold rolling process, and the results showed that the front tension effect is more obvious than the back tension. Meanwhile, along with the reduction ratio increase, the crack opening displacement and crack propagation were more obvious.

Key words: cold rolling, edge crack propagation, maximum principle stress criterion, rolling parameter, XFEM model

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