Characterisation and Optimisation of a Failure-Model for High Strength Aluminium Alloys

被引：1

作者：

Schlosser, Julian Marc ^{[1
,2
]}

Mouchtar, Serkan ^{[1
]}

Schneider, Robert ^{[1
]}

Schanz, Jochen ^{[1
,2
]}

Rimkus, Wolfgang ^{[1
]}

Harrison, David K. ^{[2
]}

Macdonald, Martin ^{[2
]}

Kulatunga, Muditha ^{[2
]}

机构：

[1] Aalen Univ, Lightweight Construct Ctr, Beethovenstr 1, D-73430 Aalen, Germany

[2] Glasgow Caledonian Univ, Dept Engn & Built Environm, Cowcaddens Rd, Glasgow, Lanark, Scotland

来源：

ADVANCES IN MANUFACTURING TECHNOLOGY XXXII | 2018年 / 8卷

关键词：

Failure model; FEM; FEA; FLC; lightweight design; high strength aluminium alloys; AA7075;

D O I：

10.3233/978-1-61499-902-7-399

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In the present work an effective parameter identification for the evaluation of a failure model for FE-simulations has been carried out. This failure model is suitable to calculate different fracture elongation values among occurring triaxiality of a high-strength aluminium sheet metal alloy (AA7075). Various specimen geometries have been selected to achieve different loading states (triaxiality). For biaxial strains a forming limit curve (FLC) is converted by using mathematical formulations. To measure the equivalent local strains in the event of fracture an optical measurement system has been installed and adapted to a tensile testing machine. The failure curve and the material model which includes the extrapolated flow curve are implemented into the FE-simulation model. In order to improve the accuracy of the failure-curve a parameter optimization has been carried out. It shows that by using the optimised failure curve a high correlation between experimental and calculated force-displacement curves for any given specimen geometry can be achieved.

引用

页码：399 / 404

页数：6

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