Description of anisotropic properties of sheet metal based on spline curves and hole expansion test simulation of high-strength steel

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:202

Article

Amaishi, Toshiro¹  Tsutamori, Hideo²  Nishiwaki, Takeshi²  Kimoto, Takaaki² 

[1] JSOL Corp Tosabori, Nishi Ku, Daibiru Bldg 2-2-4 Tosabori, Osaka 550001, Japan

[2] Daido Univ, Dept Mech Engn, Minami Ku, 10-3 Takiharu Cho, Nagoya, Aichi 4578530, Japan

关键词: Yield condition;    Anisotropic material;    Constitutive behavior;    Elastic-plastic material;    Finite element analysis;   

DOI  :  10.1016/j.ijsolstr.2020.07.010

来源: Elsevier

【 摘 要 】

A plane stress yield function with a yield surface described by Bezier curves comprising arbitrary numbers of segments is presented. This yield function can consider an arbitrary number of multiaxial stress states and their plastic strain rate directions as Bezier curve reference data. The planar anisotropy of the yield surface is described by the basis function of the cubic spline. By using the proposed model, the anisotropic properties of sheet metal are captured flexibly and precisely. To demonstrate the applicability of the proposed yield function, the accuracy of the captured anisotropic properties of high-strength steel was investigated. The proposed model was implemented in a commercial finite element analysis code, and hole expansion simulations of the high-strength steel were conducted to show the accuracy of the prediction. (C) 2020 Elsevier Ltd. All rights reserved.

【 授权许可】

Free