【摘要】 采用各向异性塑性张量来描述屈服函数,利用各向异性塑性张量的主、次对称性,并加入无迹条件与板材正交性条件,给出了适用于正交金属板材的包含应力一、二、三次项效应的三次应力屈服函数。相比于Hill屈服函数,新建立的屈服函数多了应力的一次项和三次项,能够更好地反映金属板材的真实塑性变形。更多还原

【Abstract】 By using anisotropic plastic tensors,it describes yield function,and obtains the yield function for orthorhombic sheet metals with effects of stress components up to cubic terms by utilizing the major and minor symmetry of anisotropic plastic tensors and non traceless and orthorhombic conditions.Comparing to Hill’s yield function,the new function could reflect the true plastic formation better than Hill’s function on account of the linear and cubic items of stress.更多还原