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利用Ｂ－Ｌ［５］和Ｈｉｌ（１９４８）［２］屈服函数，对薄板的各向异性行为进行了理论研究．结果表明：Ｂ－Ｌ函数［５］比Ｈｉｌ（１９４８）［２］函数更能反映材料变形的各向异性行为．当屈服函数的Ｍ值取７～１２时，Ｂ－Ｌ函数的使用效果更佳
The anisotropic behavior of thin plates has been studied theoretically using the yield functions of B-L [5] and Hil (1948) [2]. The results show that the B-L function [5] can better reflect the anisotropy of material deformation than the Hil (1948) [2] function. When the yield function M value of 7 to 12, B-L function better