本文依据最小变形能量原理,分析了板料液压胀形件的失稳变形机制;并在此基础上,提出了圆板液压胀形件顶点的极限应变预测方法。米用作者新近提出的正交异性非二次式屈服函数,对一些正变异性板进行了应用;结果表明,预测结果与试验结果基本一致。 Based on the principle of minimum deformation energy, this paper analyzes the instability deformation mechanism of sheet metal hydraulic bulge, and on this basis, puts forward the method of ultimate strain prediction of circular hydraulic bulge. The recently proposed orthotropic non-quadratic yield function of rice has been applied to some positive variability plates. The results show that the predicted results are in good agreement with the experimental results.