An Interface Damage Model for the Simulation of Delamination Under Variable-Mode Ratio in Composite Materials
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 va...
| Authors: | , , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2004 |
| Country: | España |
| Institution: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repository: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:10256/8245 |
| Online Access: | http://hdl.handle.net/10256/8245 |
| Access Level: | Open access |
| Keyword: | Materials laminats Laminated materials Materials compostos -- Deslaminatge Composite materials -- Delamination Materials compostos -- Mètodes de simulació Composite materials -- Simulation methods Assaigs de materials Materials -- Testing |
| Summary: | 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 |
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