塑性成形过程中,材料的韧性断裂是主要约束因素之一.本文用实验与有限元法结合的方法,对几种有代表性的韧性断裂准则进行了分析.结果说明以孔洞理论为基础的Oyane断裂准则能够较准确的预测成形中的启裂位置,与实验结果相吻合.同时将Oyane断裂准则用于冷镦内六角螺钉成形过程中,结果与实际生产相符合.
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