IDEAL FORMING .1. HOMOGENEOUS DEFORMATION WITH MINIMUM PLASTIC WORK

被引:103
作者
CHUNG, K
RICHMOND, O
机构
[1] Alcoa Laboratories, Alcoa Center, Pennsylvania
关键词
D O I
10.1016/0020-7403(92)90032-C
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
Ideal homogeneous deformation is defined as the path which produces a desired homogeneous deformation with minimum plastic work. Under rather broad assumptions, it is shown that this path corresponds to a path of minimum effective strain. The minimum work path is achieved when (1) the principal material lines are fixed with respect to the material during deformation, and (2) the ratio of principal true strain rates is constant. This path is unique for materials having smooth yield surfaces, such as Mises materials. For materials having pointed yield surfaces, the two conditions are only partially required and the path is not unique. For Tresca materials, an ideal path is achieved when only the major principal material line is fixed. For isotropic materials, the fixed material lines may be chosen arbitrarily; but, for anisotropic materials they are more restrictive.
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页码:575 / 591
页数:17
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