A mixed-mode delamination model using damage mechanics / D. Benzerga in COST, N° 11 ([01/07/2012])

Public ISBD [article]  in COST > N° 11 [01/07/2012] . - p. 87 Titre : A mixed-mode delamination model using damage mechanics Type de document : texte imprimé Auteurs : D. Benzerga, Auteur ; A. Haddi, Auteur ; A. Lavie, Auteur ; N. Boualem, Auteur Année de publication : 2012 Article en page(s) : p. 87 Langues : Anglais Mots-clés : composites materials  interface  damage  delamination Résumé : In this paper, delamination initiation and propagation ofreinforced fibrous composite laminate, in single and mixed mode, are numerically predicted by taking into account the existence of imperfect interfaces between the plies. The bonding conditions between layers are characterized by jumps in displacements which are proportional to the traction stresses. In order to describe the interface damage an approach based on damage mechanics considering a softening stress- relative displacements law is presented. The accuracy of the predictions is evaluated in single-mode delamination tests, in the mixed-mode bending test, and in a structural configuration consisting ofthe debonding of a new woven laminated composite reinforced by particles of the cores for orthopaedic use. The interface is watched as being a whole ofseveral interfacial bonds. Each bond is supposed to be made up ofthree stiffnesses acting in the three directions. [article] A mixed-mode delamination model using damage mechanics [texte imprimé] / D. Benzerga, Auteur ; A. Haddi, Auteur ; A. Lavie, Auteur ; N. Boualem, Auteur . - 2012 . - p. 87. Langues : Anglais in COST > N° 11 [01/07/2012] . - p. 87 Mots-clés : composites materials  interface  damage  delamination Résumé : In this paper, delamination initiation and propagation ofreinforced fibrous composite laminate, in single and mixed mode, are numerically predicted by taking into account the existence of imperfect interfaces between the plies. The bonding conditions between layers are characterized by jumps in displacements which are proportional to the traction stresses. In order to describe the interface damage an approach based on damage mechanics considering a softening stress- relative displacements law is presented. The accuracy of the predictions is evaluated in single-mode delamination tests, in the mixed-mode bending test, and in a structural configuration consisting ofthe debonding of a new woven laminated composite reinforced by particles of the cores for orthopaedic use. The interface is watched as being a whole ofseveral interfacial bonds. Each bond is supposed to be made up ofthree stiffnesses acting in the three directions.

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