Modeling of ductile fragmentation that includes void interactions

The failure and fragmentation of ductile materials through the nucleation, growth, and coalescence of voids is important to the understanding of key structural materials. In this model of development effort, ductile fragmentation of an elastic–viscoplastic material is studied through a computational...

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Bibliographic Details
Published in:Journal of the mechanics and physics of solids 2015-12, Vol.85, p.54-73
Main Authors: Meulbroek Fick, J.P., Ramesh, K.T., Swaminathan, P.K.
Format: Article
Language:English
Subjects:
Ductile fragmentation mechanisms
Failure
Fragmentation
High strain rate
Localization
Mathematical models
Nucleation
Strain rate
Structural materials
Void interactions
Voids
Wave propagation
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Summary:The failure and fragmentation of ductile materials through the nucleation, growth, and coalescence of voids is important to the understanding of key structural materials. In this model of development effort, ductile fragmentation of an elastic–viscoplastic material is studied through a computational approach which couples these key stages of ductile failure with nucleation site distributions and wave propagation, and predicts fragment spacing within a uniaxial strain approximation. This powerful tool is used to investigate the mechanical and thermal response of OFHC copper at a strain rate of 105. Once the response of the material is understood, the fragmentation of this test material is considered. The average fragment size as well as the fragment size distribution is formulated.
ISSN:0022-5096
DOI:10.1016/j.jmps.2015.09.008