Subsequent yield loci of 5754O aluminum alloy sheet

来源期刊：中国有色金属学报(英文版)2009年第5期

论文作者：王海波 万敏 吴向东 阎昱

文章页码：1076 - 1080

Key words：aluminum alloy sheet; complex loading path; subsequent yield locus; hardening mode

Abstract: Complex loading paths were realized with cruciform specimens and biaxial loading testing machine. Experimental method for determining the subsequent yield locus of sheet metal was established. With this method, the subsequent yield loci of 5754O aluminum alloy sheet were obtained under complex loading paths. Theoretical subsequent yield loci based on Yld2000-2d yield criterion and three kinds of hardening modes were calculated and compared with the experimental results. The results show that the theoretical subsequent yield loci based on mixed hardening mode describe the experimental subsequent yield loci well, whereas isotropic hardening mode, which is widely used in sheet metal forming fields, predicts values larger than the experimental results. Kinematic hardening mode predicts values smaller than the experimental results and its errors are the largest.

基金信息：the National Natural Science Foundation of China