Modeling of Ductile Damage and Fracture Behavior Based on Different Micromechanisms

The article deals with the effect of stress triaxiality on the inelastic deformation behavior of aluminum alloys. The proposed continuum model takes into account stress triaxiality dependence of the yield condition as well as of the damage criterion and the fracture condition with different branches...

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Bibliographic Details
Published in:International journal of damage mechanics 2011-05, Vol.20 (4), p.558-577
Main Authors: Brünig, Michael, Albrecht, Daniel, Gerke, Steffen
Format: Article
Language:English
Subjects:
Alloys
Continuums
Damage
Fracture mechanics
Mathematical analysis
Mathematical models
Stresses
Triaxiality
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Summary:The article deals with the effect of stress triaxiality on the inelastic deformation behavior of aluminum alloys. The proposed continuum model takes into account stress triaxiality dependence of the yield condition as well as of the damage criterion and the fracture condition with different branches corresponding to various damage and failure modes depending on the stress triaxiality and the Lode parameter. Results of numerical cell simulations on the microscale are presented and corresponding identification of micromechanically motivated material parameters is discussed. Furthermore, numerical results of three-dimensional macromechanical finite element analyses are compared with experimental data obtained from smooth and pre-notched tension specimens. The analyses allow verification of the continuum model and identification of further material parameters.
ISSN:1056-7895
1530-7921
DOI:10.1177/1056789510386860