Predicting plasticity and fracture of severe pre-strained EN AW-5182 by Yld2000 yield locus and Hosford-Coulomb fracture model in sheet forming applications

被引：1

作者：

Camberg, A. A. ^{[1
]}

Troester, T. ^{[1
]}

Bohner, F. ^{[2
]}

Toelle, J. ^{[2
]}

机构：

[1] Paderborn Univ, Automot Lightweight Design, Pohlweg 47-49, D-33098 Paderborn, Germany

[2] BENTELER Automobiltech GmbH, Res & Dev, Talle 27-31, D-33102 Paderborn, Germany

来源：

38TH INTERNATIONAL DEEP DRAWING RESEARCH GROUP ANNUAL CONFERENCE (IDDRG 2019) | 2019年 / 651卷

关键词：

ALUMINUM-ALLOYS; DEFORMATION;

D O I：

10.1088/1757-899X/651/1/012057

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

The objective of this contribution is to evaluate the capabilities of the Yld2000 yield locus and the Hosford-Coulomb fracture model under isothermal conditions for an EN AW-5182 H18 material in sheet metal forming applications. The calibration of the Yld2000 model is based on uniaxial tension tests in 0 degrees, 45 degrees and 90 degrees in respect to rolling direction and additional layer compression tests. Subsequently, the calibrated plasticity model is evaluated under shear stress and plane strain dominant conditions. Stress state dependent fracture strains are obtained from various tensile tests as well as from FLD tests. The implemented failure prediction is based on a generalized incremental stress-state dependent fracture model (GISSMO) combined with a three-parameter Hosford-Coulomb fracture and instability curve. Finally, the plasticity and fracture models are validated at a cross die cup. It is shown that the models are capable to provide an accurate prediction of the onset of fracture and could be used for a non-isothermal extension in future work.

引用

页数：8

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