Micro-mechanical modelling of ductile failure in 6005A aluminium using a physics based strain hardening law including stage IV
| Autor: | B. de Meester, Thomas Pardoen, Aude Simar, Viggo Tvergaard, Kim Lau Nielsen |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Materials science
Mechanical Engineering Metallurgy chemistry.chemical_element Strain hardening exponent Plasticity Microstructure Isothermal process Cracking chemistry Mechanics of Materials Aluminium visual_art Aluminium alloy visual_art.visual_art_medium Hardening (metallurgy) General Materials Science Composite material |
| Zdroj: | Engineering Fracture Mechanics. 77:2491-2503 |
| ISSN: | 0013-7944 |
| DOI: | 10.1016/j.engfracmech.2010.06.008 |
| Popis: | The strain hardening and damage behaviour of isothermally heat treated 6005A aluminium is investigated in order to link the thermal treatment conditions, microstructure and fracture strain. The need for a plastic flow rule involving a stage IV hardening at large strain was found essential to generate quantitative predictions when using an enhanced Gurson type damage model for the material behaviour. This model relies on an explicit description of the three stages of nucleation, growth and coalescence of voids, involving void shape effects. An implementation within a 3D finite element code allows for the simulation of the full tensile response curves up to cracking initiation and final failure. Reasonable agreement is found when comparing the predicted and experimentally measured fracture strains for a wide range of heat treatment conditions using real microstructure based parameters. (C) 2010 Elsevier Ltd. All rights reserved. |
| Databáze: | OpenAIRE |
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