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|Title: ||Arbitrary bi-dimensional finite strain crack propagation|
|Authors: ||Areias, P.|
|Issue Date: ||2009|
|Abstract: ||In this paper, a systematic approach for elastic
finite strain crack propagation with multiple cohesive cracks
and self-contact is described. Crack paths are determined
by the CTOD method and the advance criterion uses either
the equivalent stress intensity factor or the tip-element stress.
Crack intersections, coalescence and cohesive laws are
accounted for, as is the formation of multiple particles.
Globally-optimized mesh repositioning is used to minimize
the least-square of all elements’ inner-angle error. This is followed,
in a staggered form, by a Godunov-based advection
step for the deformation gradient. Several examples are presented
showing the robustness and accuracy of the implementation,
as well as the ability to represent crack face thickness
variation in finite strains. Classical fracture benchmarks are
solved and a problem of multiple crack evolution is proposed.
Excellent results were observed in the effected tests.|
|Appears in Collections:||FIS - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica|
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