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A numerical fracture analysis of a stationary semi-circular interface crack during interfacial indentation test

type de publication      article dans une revue internationale avec comité de lecture
date de publication 25-10-2006
auteur(s) Liu Guo; Mouftiez Anne; Lesage Jacky; Panier Stéphane
journal (abréviation) Surface and Coatings Technology (Surf Coating Tech)
volume (numéro) 201 (5)
pages 2086 – 2091
résumé The aim of this work is to investigate the fracture behavior of a stationary crack lying along the interface in a coated system during interfacial indentation test. One traditional 3D numerical model and one cohesive element numerical model have been made to study the Vickers indentation test process. A crack-block approach is applied to generate 3D meshes containing the crack front along the interface. The stress intensity factors and the energy release rates (G) on the crack front are computed. The fracture mode mixity is also presented. It is found that the near surface propagation of the crack can be prevented during loading due to compressive stresses. It may occur during unloading due to residual stresses resulting from plastic strain.
mots clés modeling, interface crack, adhesion
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