Contrary to plane strain, it is noted that, for plane stress case, the higher J-dominance level occurs under pure tension condition, and the lower J-dominance level occurs under pure bending condition. 值得注意的是:与平面应变情形相反,在平面应力条件下,较高的J主导水平发生在纯拉伸条件下,而较低的J主导水平发生在纯弯曲条件。