Numéro
J. Phys. IV France
Volume 06, Numéro C6, Octobre 1996
EUROMECH - MECAMAT'96
1st European Mechanics of Materials Conference on Local Approach to Fracture '86 - 96'
Page(s) C6-325 - C6-334
DOI https://doi.org/10.1051/jp4:1996632
EUROMECH - MECAMAT'96
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. Needleman

Division 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