Numéro |
J. Phys. IV France
Volume 06, Numéro C6, Octobre 1996
EUROMECH - MECAMAT'961st European Mechanics of Materials Conference on Local Approach to Fracture '86 - 96' |
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Page(s) | C6-325 - C6-334 | |
DOI | https://doi.org/10.1051/jp4:1996632 |
1st European Mechanics of Materials Conference on Local Approach to Fracture '86 - 96'
J. Phys. IV France 06 (1996) C6-325-C6-334
DOI: 10.1051/jp4:1996632
Numerical Modeling of the Ductile-Brittle Transition
A. NeedlemanDivision of Engineering, Brown University Providence, RI, 02912, U.S.A.
Abstract
Numerical studies of the ductile-brittle transition are described that are based on incorporating physically based models of the competing fracture mechanisms into the material's constitutive relation. An elastic-viscoplastic constitutive relation for a porous plastic solid is used to model ductile fracture by the nucleation and subsequent growth of voids to coalescence. Cleavage is modeled in terms of attaining a temperature and strain rate independent critical value of the maximum principal stress over a specified material region. Various analyses of ductile-brittle transitions carried out within this framework are discussed. The fracture mode transition emerges as a natural outcome of the initial/boundary value problem solution.
© EDP Sciences 1996