抄録
By applying the elastic-plastic constitutive equation based on Hill's anisotropic yield surface equation to the uniaxial tensile deformation, the size variation of tensile specimens has been numerically analyzed with the r-values as parameters of the material anisotropy. Then, the results of the numerical calculation have been compared with those of the uniaxial tensile test of carbon steel specimens. As a result, it has been shown that the accuracy of size variation of specimens in the numerical analysis improves remarkably by considering the material anisotropy.
