Numerical modeling of the ductile-brittle transition Academic Article uri icon

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 reletion. An elastic-viscoplastic constitutive relation for a porous plastic solid is used to model ductile fracture by the mucleation and subsequent growth of voids to coalesoence. 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.

published proceedings

  • Journal De Physique. IV : JP

author list (cited authors)

  • Needleman, A

complete list of authors

  • Needleman, A

publication date

  • December 1996