Failure prediction for nonlinear strain paths in sheet metal forming

被引：38
|
作者：
Volk, Wolfram [1 ]
Hoffmann, Hartmut [1 ]
Suh, Joungsik [1 ]
Kim, Jaekun [1 ]
机构：
[1] Tech Univ Munich, Inst Met Forming & Casting, D-8046 Garching, Germany
来源：
CIRP ANNALS-MANUFACTURING TECHNOLOGY | 2012年 / 61卷 / 01期
关键词：
Forming; Sheet metal; Failure prediction; LIMIT DIAGRAMS;
D O I：
10.1016/j.cirp.2012.03.111
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The Forming Limit Curve (FLC) is a conventional failure criterion to estimate sheet metal formability for proportional loading conditions in Finite Element Analysis. Previous studies found that a standard FLC is not suitable for predicting the influence of nonlinear strain paths. This paper introduces a new method for the description of failure behavior in two-step forming operations by using a metamodeling technique. The main objectives of this approach are the cost effectiveness of the required experimental calibration and its practical applicability. The predicted forming limits determined with the proposed method are presented and validated by experimental results. (C) 2012 CIRP.
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页码：259 / 262
页数：4
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