对于正交异性材料屈服准则的实验验证

Examination of Yield Criterion for Orthotropic Materials

对流行的Ｒ．Ｈｉｌｌ准则与新近提出的无量纲应力准则进行了三种材料薄壁圆管Ｐ－２比例加载的实验验证，实验结果表明：对于纯铝Ｌ２，与两个准则符合均良好；对于另外两种材料，实验点在两个准则的理论曲线之外，更靠近无量纲应力准则。

A series of experiments with thin-wall pipe specimens of 3 sorts of materials (20# carbon steel, pure aluminium L2 and Mg alloy MB8) under P-p proportional loading was conducted for examination of the current R.Hill criterion and the recently propoced dimensionless stress criterion for orthotropic materials. The results of experiments show that the agreement of experimental data with the dimensionless stress criterion is better than that with R.Hill criterion.