Anisotropic ductile fracture is of special importance for accurate modeling of failure in plastic forming of lightweight sheet metals. This research introduces a user-friendly approach to model loading direction effect on fracture limits of sheet metals. The approach is combined with a newly developed fracture criterion (DF2016) to illustrate anisotropic fracture in shear, uniaxial tension and plane strain tension as well as fracture under balanced biaxial tension. The anisotropic DF2016 criterion is applied to describe loading direction effect on the fracture limits of two sheet metals: 6k21 aluminum alloy and a steel sheet of DP980. The predicted loading direction effect is observed to agree with the experimental results with high accuracy. The applications demonstrate that there are three advantages of the proposed approach: high accuracy, good flexibility and being very user-friendly in the calibration of anisotropic parameters. Therefore, we recommend the proposed anisotropic DF2016 criterion for numerical failure prediction in stamping of strong anisotropic metals.

各向异性延性断裂对于精确建模轻质钣金的塑性成形中的破坏尤为重要。这项研究引入了一种用户友好的方法来模拟加载方向对钣金断裂极限的影响。该方法与最新开发的断裂准则（DF2016）相结合，以说明剪切，单轴张力和平面应变张力以及平衡双轴张力下的各向异性断裂。各向异性DF2016准则用于描述载荷方向对两种板材（6k21铝合金和DP980钢板）的断裂极限的影响。观察到的预测载荷方向效应与实验结果吻合得很高。应用表明，该方法具有三个优点：高精度，具有良好的灵活性，并且在校准各向异性参数时非常人性化。因此，我们建议使用拟定的各向异性DF2016标准来预测强各向异性金属冲压中的数值失效。