Multiscale modeling of the competition between intergranular and transgranular ductile fracture in Al alloys

F. Scheyvaerts, P. R. Onck, Y. Bréchet, T. Pardoen

Research output: Chapter in Book/Report/Conference proceedingConference PaperOther

Abstract

The competition between intergranular and transgranular ductile fracture in Al alloys with precipitate free zones is investigated using a multiscale FE based approach. The solid is represented by discrete grains. Each grain is made of harder interior core and softer grain boundary layers, each region being discretized with many elements and represented by different hardening and damage related parameters. The material behaviour is given by an advanced micromechanical damage model for the transition to the smallest scale. This model relies on the extension of the Gurson model by Gologanu while introducing a new void rotation law and a new generalized void coalescence model. Homogenous biaxial loading, tensile testing with necking and crack propagation from a precrack are simulated to investigate the relationships between the hardening law, microstructure parameters, stress state, fracture mechanisms and fracture resistance expressed by a fracture strain or a JR curve.

Original languageEnglish
Title of host publication12th International Conference on Fracture 2009, ICF-12
Pages3509-3517
Number of pages9
Publication statusPublished - 2009
Externally publishedYes
EventInternational Congress on Fracture 2009 - Ottawa, Canada
Duration: 12 Jul 200917 Jul 2009
Conference number: 12th

Publication series

Name12th International Conference on Fracture 2009, ICF-12
Volume5

Conference

ConferenceInternational Congress on Fracture 2009
Abbreviated titleICF 2009
CountryCanada
CityOttawa
Period12/07/0917/07/09

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