A PROBABILISTIC APPROACH FOR MODELLING OF FRACTURE IN MAGNESIUM DIE-CASTINGS
METALLURGIA ITALIANA, no.3, pp.51-54, 2009 (SCI-Expanded, Scopus)
- Publication Type: Article / Article
- Volume: Issue: 3
- Publication Date: 2009
- Journal Name: METALLURGIA ITALIANA
- Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Compendex
- Page Numbers: pp.51-54
- Istanbul University Affiliated: Yes
Abstract
Quasi-static tensile tests with specimens cut from a generic cast component are performed to characterise the mechanical behaviour of the high-pressure die cast)magnesium alloy AM60. The experimental data is used to establish a probabilistic methodology for finite element modelling of thin-walled die castings subjected to quasi-static loading, The cast magnesium alloy AM60 is described using an elastic-plastic constitutive model consisting of a high-exponent, isotropic yield criterion, the associated flow law? and all isotropic hardening rule. A novel probabilistic approach for modelling of fracture In thin-walled magnesium die-castings using finite element analysis is developed. The Cockcroft-Latham criterion for ductile fracture is adopted with the fracture parameter assumed to follow a modified weakest link Weibull distribution. Comparison between the experimental and predicted behaviour of the cast magnesium tensile specimens gives very promising results.