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

doi:10.3901/JME.2017.18.079

Abstract

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

CLC Number:

TG335

ZAN Daqian, CHEN Yanxing, CHEN Jianjun, PAN Hongliang, WANG Zhengdong. Application of the XFEM to Predict the Edge Crack Propagation of Steel Sheet in the Cold Rolling Process[J]. Journal of Mechanical Engineering, 2017, 53(18): 79-86.

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