初期異方性板材の変形局所化過程の解析 : 直交異方性板の引張負荷下における検討

概要

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A rational constitutive model for initially orthotropic but subsequently skewed-anisotropic materials is proposed in this paper. The variation of anisotropic axes is discussed, and the evolution of the axes is then formulated. It is shown that the yield function proposed is identical to Hill's quadratic form in a very special case of orthotropy. Applying the conventional laws for both workhardening and material flow to the anisotropic yield function, an anisotropic constitutive model is completed. A finite element equation is obtained next, based on the up-dated Lagrangian type formulation. Three-dimensional finite element analyses are carried out to predict the necking of anisotropic sheet metals. The direction of the localization is strongly affected by the initial configuration of the anisotropic axes.
一般社団法人日本機械学会の論文
1994-04-25