CALCULATIONS OF FORMING LIMIT DIAGRAMS

被引:118
作者
GRAF, A
HOSFORD, WF
机构
[1] Institute Argentino de Siderurgia, Buenos Aires, 1104
[2] Department of Materials Science and Engineering, University of Michigan, Ann Arbor, 48109-2136, MI, Dow Building
来源
METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1990年 / 21卷 / 01期
关键词
D O I
10.1007/BF02656427
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The right-hand side of the forming limit diagram (FLD) was calculated using a Marciniak-Kuczynski analysis with a nonquadratic anisotropic yield criterion. Effects of changing the strain-hardening exponent, n, strain-rate exponent, m, strain ratio, R, stress exponent in the anisotropic yield criterion, a, and the inhomogeneity factor, f, were explored. For a ≥ 6, the effect of R is negligible. The calculated forming limit for plane strain is raised by increased values of n, m, and f and is unaffected by R and a. The slope of the right-hand side is decreased by increased values of n, m, and a, whereas the slope increases with higher f The calculated FLDs agree well with experimental ones determined by in-plane stretching. © 1990 The Metallurgical of Society of AIME.
引用
收藏
页码:87 / 94
页数:8
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