Inverse Yield Locus Identification of Sheet Metal Using a Complex Cruciform in Biaxial Tension and Digital Image Correlation

Proceedings

Kuwabara, Toshihiko¹  Coppieters, Sam²  Hakoyama, Tomoyuki³  Debruyne, Dimitri⁴  Takahashi, Susumu⁵ 

[1] Author to whom correspondence should be addressed.;Department of Materials Engineering, KU Leuven, 9000 Ghent, Belgium;Department of Mechanical Engineering, Gifu University, Gifu 501-1193, Japan;Department of Mechanical Engineering, Nihon University, Chiba 275-8575, Japan;Division of Advanced Mechanical Systems Engineering, Institute of Engineering, Tokyo University of Agriculture and Technology, Tokyo 184-8588, Japan

关键词: anisotropic yield function;    Finite Element Model Updating;    digital image correlation;    biaxial tensile testing;   

DOI  :  10.3390/ICEM18-05208

学科分类：社会科学、人文和艺术（综合）

来源: mdpi

【 摘 要 】

Finite Element Model Updating (FEMU) is an intuitive inverse technique enabling to efficiently characterize plastic material behavior. Although, conclusive proof of concept for this method can be found in literature, a thorough understanding of the key FEMU-ingredients and their impact on the identification of plastic anisotropy is currently missing. In this paper, we aim at minimizing the experimental work associated with yield locus identification of sheet metal via homogeneous biaxial tensile tests. To this end, a biaxial tension apparatus with link mechanism is used to generate a heterogeneous deformation field within a perforated cruciform specimen. The experimentally measured force and displacement field are used in the FEMU procedure to identify an anisotropic yield criterion. The FEMU approach is assessed by comparing the results with experimental data acquired from state-of-the-art stress-controlled biaxial tensile test in the first quadrant of stress-space.

【 授权许可】

CC BY