A levet set model for the numerical modeling of composite delamination with nonconforming mesh and minimal remeshing
Résumé
Delamination is one of the main failure processes for composite laminates. Modeling progressive
delamination of such materials is thus of particular interest. A new approach has been proposed
by F. P. van der Meer et al. a few years ago, which allows for the use of elements larger than the
cohesive zone. With this method, the crack front is represented implicitly using a level set field
whereas the cohesive zone is supposed to reduce to a line. Consequently, the crack front does not
have to remain aligned with the mesh and remeshing is no longer necessary. Weak discontinuities
are inserted in the displacement field at crack front location, allowing for a sharp transition between
the cracked and uncracked parts. Crack growth is driven by an explicit energy-based relation in
which the configurational force is defined as the jump in Eshelby tensor over the front. In this
paper, we investigate the case of isotropic multilayered membranes with several crack fronts evolving
independently or interacting with each others.
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