直交異方性降伏関数と積層板の成形性解析への適用

概要

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Characteristic anisotropy is induced in sheet metals through the production process of rolling. Since such an anisotropy has a predominant influence on the forming limit of sheet metals, initial anisotropy must be taken into account in order to evaluate the formability of sheet metals as well as the laminated sheet metals whose layers comprise such anisotropic materials. The aim of this paper is to formulate a rational constitutive relationship for initially anisotropic (particularly orthotropic) materials and to apply it to the formability analysis of laminated composite sheets. An orthotropic yield function is formulated based on the representation theorem for isotropic tensors, and equivalence to Hill's quadratic form is shown. An application is made to the material design of a laminated sheet, particularly focusing on the variation of the γ-value which reflects the formability of sheet metals.
一般社団法人日本機械学会の論文
1993-04-25