Journal article
Numerical modeling of the ductile-brittle transition
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 of the order of one or two grain sizes. Various analyses of ductile-brittle transitions carried out within this framework are discussed.
The specimens considered include the Charpy V-notch test and cracked specimens under mode I or mode II loading conditions. The fracture mode transition emerges as a natural outcome of the initial-boundary value problem solution.
Language: | English |
---|---|
Publisher: | Kluwer Academic Publishers |
Year: | 2000 |
Pages: | 73-97 |
ISSN: | 15732673 and 03769429 |
Types: | Journal article |
DOI: | 10.1023/A:1007520917244 |