Determination of true stress-strain-curves and normal anisotropy in tensile tests with optical strain measurement

被引：42

作者：

Hoffmann, H ^{[1
]}

Vogl, C ^{[1
]}

机构：

[1] Tech Univ Munich, Inst Met Forming & Casting, D-8000 Munich, Germany

来源：

CIRP ANNALS-MANUFACTURING TECHNOLOGY | 2003年 / 52卷 / 01期

关键词：

anisotropy; FEM; tensile test;

D O I：

10.1016/S0007-8506(07)60569-1

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper describes a method to measure the flow curve which undergoes necking and normal anisotropy as a function of equivalent strain using an optical measurement system. The flow stress was determined by modifying Siebel and Schwaigerer's model. Normal anisotropy was regarded as a function of equivalent strain. Comparing with the experiment of the stretch forming process, the simulation using improved material properties shows the better strain distribution than the results using conventional material properties in high strain areas.

引用

页码：217 / 220

页数：4