FORMING LIMIT DIAGRAMS CALCULATED USING HILLS NONQUADRATIC YIELD CRITERION

被引：16

作者：

PISHBIN, H ^{[1
]}

GILLIS, PP ^{[1
]}

机构：

[1] UNIV KENTUCKY, DEPT MAT SCI & ENGN, LEXINGTON, KY 40506 USA

来源：

METALLURGICAL TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 1992年 / 23卷 / 10期

关键词：

D O I：

10.1007/BF02651760

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Forming limit diagrams (FLD) are calculated based on an extension of previous analyses by Jones and Gillis[4,5,6] and Choi et al.[8,9] They idealized the sheet metal deformation into three phases: (I) homogeneous deformation up to maximum load, (II) deformation localization under constant load, and (III) local necking with a precipitous drop in load. They described the plastic behavior of sheet metals using a generalized quadratic flow law proposed by Jones and Gillis (JG). In the current analysis, Hill's nonquadratic flow law for sheets having in-plane isotropy[10] is used in conjunction with the three-stage deformation approximation. Calculated FLDs compare very favorably to experimentally determined results for aluminum-killed (AK) steel and aluminum alloys 2036-T4, 1100-H19. 5052-H32, 3003-0, and 3004-0. The comparison is fair for the titanium alloy Ti-6Al-4V. The agreement is poor for the strain rate-insensitive aluminum alloys 5052-0, 5052-H241, 5154-H111, and 6061-T4.

引用

页码：2817 / 2831

页数：15

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