Constitutive Relations for Superplastic Flow Modeling from Two Axial Loading Experiments

被引：9

作者：

Akhunova, A. ^{[1
]}

Dmitriev, S. ^{[1
]}

Kruglov, A. ^{[1
]}

Safiullin, R. ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Met Superplast Problems, Ufa 450001, Russia

来源：

SUPERPLASTICITY IN ADVANCED MATERIALS | 2010年 / 433卷

关键词：

superplastic forming; computer simulation; constitutive relation; two axial loading;

D O I：

10.4028/www.scientific.net/KEM.433.319

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A critical analysis of approaches to find constitutive relations from the tests on uniaxial and two axial loading is presented. Then we report on the methodology of fitting parameters of constitutive relations for superplastic forming based on the results of cone cup and elongated wedge cup tests. Optimal cone and wedge angles are estimated analytically and also from the results of finite element simulations. Our methodology is based on comparison of the experimental results and the results of numerical simulations of the corresponding tests in frame of the commercial software such as ANSYS10.0 (ED). We carry out numerical simulations of the cone cup and the wedge cup tests for different sets of parameters of the chosen constitutive relation and different values of friction coefficient in order to reproduce the experimental results. The parameters corresponding to the best fit of the experimental data are then recommended for the use in computer simulations of the superplastic forming of commercial products.

引用

页码：319 / 323

页数：5