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Inauguração da Exposição A Velha Escola Morreu
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Analytical and Numerical Investigation of the Length of the Cohesive Zone in Delaminated Composite Materials

Title
Analytical and Numerical Investigation of the Length of the Cohesive Zone in Delaminated Composite Materials
Type
Article in International Conference Proceedings Book
Year
2008
Authors
Turon, A
(Author)
Other
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Costa, J
(Author)
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Camanho, PP
(Author)
FEUP
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Maimi, P
(Author)
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Conference proceedings International
Other information
Authenticus ID: P-00K-DV2
Abstract (EN): An accurate prediction of the length of the cohesive zone ahead of a crack tip is fundamental for the correct simulation of delamination in composite materials under both quasi-static and fatigue loading. To ensure a correct dissipation of energy during delamination propagation, several cohesive finite elements have to span the cohesive zone. The length of the cohesive zone depends on the material properties, the geometry/size of the structure, and on the loading mode. This chapter presents new expressions to estimate the length of the cohesive zone under general mixed-mode loading conditions and for finite-sized geometries. The analytical model is validated by comparing its predictions with numerical results based on cohesive-zone models. The relevance of the proposed analytical solutions to the effective simulation of delamination is demonstrated by simulating delamination growth under mixed-mode loading using meshes with the length of the elements greater than the cohesive zone length.
Language: English
Type (Professor's evaluation): Scientific
No. of pages: 3
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