During tandem cold rolling mill process, strip tearing reduces production rate, damages the rollers, and consequently decreases efficiency of production. Predicting and postponing of this phenomenon leads to less expensive trial and errors in rolling industries. In this research first, DIN1623 St12 steel which is frequently applied in metal forming industries and also Bao–Wierzbicki ductile damage criterion is selected. Then, six curve fitting methods are employed to calibrate the material and are presented in 2D space of equivalent plastic strain to fracture and stress triaxiality. Finally, the achieved fracture loci are validated by comparing corresponding simulation results with experimental tests and the best curve fitting method with aims of high accuracy for tracking the strip tearing in a tandem cold rolling mill process and fewer numbers of required tests is revealed. Eventually, due to engaging this innovative approach, it is possible to trace the strip tearing in tandem cold rolling mill process by performing only two simple tensile tests. Therefore, it is concluded that strip tearing phenomenon can be precisely predicted in tandem cold rolling mill processes by a special focus on calibration of the Bao–Wierzbicki damage criterion in the range of low positive stress triaxiality which causes less number of needed tests.

在串联冷轧机过程中，钢带撕裂降低了生产率，损坏了轧辊，从而降低了生产效率。对这种现象的预测和推迟导致滚动行业的试验和错误成本降低。在这项研究中，首先选择在金属成型行业中经常使用的DIN1623 St12钢，并选择Bao-Wierzbicki延性破坏准则。然后，采用了六种曲线拟合方法来校准材料，并在等效塑性应变的二维空间中显示了断裂和应力三轴性。最后，通过将相应的模拟结果与实验测试进行比较，验证了所获得的断裂轨迹，并采用了最佳的曲线拟合方法，其目的是在串联冷轧机中跟踪带材撕裂的高精度，并且减少了所需的测试次数。最终，由于采用了这种创新方法，仅通过执行两个简单的拉伸试验就可以在串联冷轧机过程中追踪带材的撕裂。因此，可以得出结论，通过特别关注在低正应力三轴性范围内对Bao-Wierzbicki损伤准则的校准，可以精确地预测带钢撕裂现象，从而减少了所需的测试次数。只需执行两个简单的拉伸试验，就可以在串联冷轧机中追踪带材的撕裂。因此，可以得出结论，通过特别关注在低正应力三轴性范围内对Bao-Wierzbicki损伤准则的校准，可以精确地预测带钢撕裂现象，从而减少了所需的测试次数。只需执行两个简单的拉伸试验，就可以在串联冷轧机中追踪带材的撕裂。因此，可以得出结论，通过特别关注在低正应力三轴性范围内对Bao-Wierzbicki损伤准则的校准，可以精确地预测带钢撕裂现象，从而减少了所需的测试次数。