An Interface Damage Model for the  Simulation of Delamination Under  Variable-Mode Ratio in Composite  Materials

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Títol:	An Interface Damage Model for the Simulation of Delamination Under Variable-Mode Ratio in Composite Materials
Autor/a:	Turon Travesa, Albert; Camanho, Pedro Manuel Ponces Rodrigues de Castro; Costa i Balanzat, Josep; Dávila, Carlos G.
Abstract:	A thermodynamically consistent damage model for the simulation of progressive delamination under variable mode ratio is presented. The model is formulated in the context of the Damage Mechanics. The constitutive equation that results from the deﬁnition of the free energy as a function of a damage variable is used to model the initiation and propagation of delamination. A new delamination initiation criterion is developed to assure that the formulation can account for changes in the loading mode in a thermodynamically consistent way. The formulation proposed accounts for crack closure eﬀets avoiding interfacial penetration of two adjacent layers after complete decohesion. The model is implemented in a ﬁnite element formulation. The numerical predictions given by the model are compared with experimental results
Matèries:	-Materials laminats -Laminated materials -Materials compostos -- Deslaminatge -Composite materials -- Delamination -Materials compostos -- Mètodes de simulació -Composite materials -- Simulation methods -Assaigs de materials -Materials -- Testing
Drets:	Tots els drets reservats
Tipus de document:	Article Article - Versió publicada
Publicat per:	National Aeronautics and Space Administration
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Turon Travesa, Albert; Dávila, Carlos G.; Camanho, Pedro Manuel Ponces Rodrigues de Castro; Costa i Balanzat, Josep

Turon Travesa, Albert; Costa i Balanzat, Josep; Camanho, Pedro Manuel Ponces Rodrigues de Castro; Dávila, Carlos G.

Dávila, Carlos G.; Camanho, Pedro Manuel Ponces Rodrigues de Castro; Turon Travesa, Albert

Mayugo Majó, Joan Andreu; Camanho, Pedro Manuel Ponces Rodrigues de Castro; Maimí Vert, Pere; Dávila, Carlos G.

Maimí Vert, Pere; Camanho, Pedro Manuel Ponces Rodrigues de Castro; Mayugo Majó, Joan Andreu; Dávila, Carlos G.

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