Interlaminar interface modelling for the prediction of delamination

Allix, Olivier; Ladevèze, Pierre

doi:10.1016/0263-8223(92)90060-p

Cited by 392 publications

(199 citation statements)

References 9 publications

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“…Chaque noeud porte ses propres déplacements comme inconnues, et les lois de comportement, sont écrites directement en termes de force-déplacement : on introduit donc naturellement l'ouverture, ou déplacement normal au plan de l'élément, et un (2D) ou deux (3D) déplacement tangents, ainsi que les forces nodales conjuguées. Dans les modèles les plus avancés, la courbe de comportement fait intervenir des variables qui prennent en compte l'endommagement et l'effet Bauschinger [34,[36][37][38]. Comme le précise une revue classique [39], cette classe de modèle peut s'appliquer à n'importe quel type d'interface, pour laquelle l'évolution de l'endommagement va produire une transition entre l'état initial, dans lequel l'élément est élastique, et l'état rompu, où il ne peut plus supporter aucun effort (D = 1).…”

Section: Eléments D'interfaceunclassified

Une introduction à la plasticité cristalline interactions avec l'environnement

Cailletaud

2009

PlastOx 2007 - Mécanismes Et Mécanique Des Interactions Plasticité - Environnement

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Résumé. Cette partie est une introduction aux modèles phénoménologiques de plasticité cristalline. On discute leurs propriétés, et leurs utilisations dans le cadre de modélisations de microstructures. Les versions plastiques et viscoplastiques sont citées. Les applications portent sur des monocristaux ou des polycristaux. Dans ce dernier cas, on a privilégié les modèles éléments finis, qui permettent de véritables calculs de microstructures. L'exposé se conclut par quelques exemples dans lesquels l'environnement jour un rle important.

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Section: Eléments D'interfaceunclassified

Une introduction à la plasticité cristalline interactions avec l'environnement

Cailletaud

2009

PlastOx 2007 - Mécanismes Et Mécanique Des Interactions Plasticité - Environnement

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“…Reference [13], is the analysis of delamination in layered composite materials [14][15][16][17]. Since the propagation of delaminations is then restricted to the interfaces between the plies, inserting interface elements at these locations permits an exact simulation of the failure mode.…”

Section: Discrete Numerical Representations Of Cohesive-zone Modelsmentioning

confidence: 99%

Cohesive‐zone models, higher‐order continuum theories and reliability methods for computational failure analysis

Borst

Gutiérrez

Wells

et al. 2004

Numerical Meth Engineering

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SUMMARYA concise overview is given of various numerical methods that can be used to analyse localization and failure in engineering materials. The importance of the cohesive-zone approach is emphasized and various ways to incorporate the cohesive-zone methodology in discretization methods are discussed. Numerical representations of cohesive-zone models suffer from a certain mesh bias. For discrete representations this is caused by the initial mesh design, while for smeared representations it is rooted in the ill-posedness of the rate boundary value problem that arises upon the introduction of decohesion. A proper representation of the discrete character of cohesive-zone formulations which avoids any mesh bias can be obtained elegantly when exploiting the partition-of-unity property of finite element shape functions. The effectiveness of the approach is demonstrated for some examples at different scales. Moreover, examples are shown how this concept can be used to obtain a proper transition from a plastifying or damaging continuum to a shear band with gross sliding or to a fully open crack (true discontinuum). When adhering to a continuum description of failure, higher-order continuum models must be used. Meshless methods are ideally suited to assess the importance of the higher-order gradient terms, as will be shown. Finally, regularized strain-softening models are used in finite element reliability analyses to quantify the probability of the emergence of various possible failure modes.

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“…The main approaches for the numerical simulation of impact induced effects are based on Continuum Damage Mechanics (CDM) and Fracture Mechanics. In CDM material models [1][2][3] both the plies and the interfaces of a composite are modeled using appropriate damage theories. On the other hand, fracture mechanics techniques -e.g.…”

Section: Introductionmentioning

confidence: 99%

“…This approach is mentioned in the literature as 'stacked shell' or 2.5D approach. It is based on the CDM approach proposed by Allix and Ladeveze [1], replacing the CDM matrix representation with cohesive zone interfaces. The main advantage of this modeling technique is the revocation of aspect ratio restrictions concerning the in-plane and through thickness element dimensions, presenting obvious advantages in regard to simulation accuracy and computational efficiency, compared to traditional modeling techniques.…”

Section: Introductionmentioning

confidence: 99%