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A nonlinear finite thickness cohesive interface element for modeling delamination in fibre-reinforced composite laminates

Reinoso, José and Paggi, Marco and Blázquez, A. A nonlinear finite thickness cohesive interface element for modeling delamination in fibre-reinforced composite laminates. Composites Part B: Engineering, 109. 116 - 128. ISSN 1359-8368 (2017)

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Abstract Delamination events are major issues which notably affect the integrity of composite structures. To minimize the experimental efforts, there is an increasing demand for developing reliable numerical tools that can accurately simulate delamination initiation and propagation under mixed-mode loading conditions. The current investigation is concerned with the formulation and the finite element (FE) implementation of a new nonlinear finite thickness cohesive interface model for delamination analysis of fibre-reinforced composite laminates relying on the solid shell concept. The incorporation of geometrically nonlinear effects into the proposed interface formulation is motivated by the recent trend of producing composite structures that can experience large displacements prior to failure, as is the case of postbuckling in stiffened panels. The inelastic material behavior of the interface is modeled using two standard nonlinear decohesion laws: (i) an exponential-based, and (ii) a polynomial-based interface laws. Finally, the performance of the proposed interface element is demonstrated by means of several examples focusing on double cantilever beam (DCB) and rib-stiffened specimens. A excellent level of accuracy is achieved when comparing the numerical predictions and the available experimental data.

Item Type: Article
Identification Number: 10.1016/j.compositesb.2016.10.042
Projects: ERC Starting Grant “Multi-field and multi-scale Computational Approach to Design and Durability of PhotoVoltaic Modules” - CA2PVM
Funders: European Union's Seventh Framework Programme (FP/2007-2013)/ERC Grant Agreement n. 306622.
Uncontrolled Keywords: Finite thickness interface; Cohesive zone modeling; Delamination; Finite element method; Fracture
Subjects: T Technology > T Technology (General)
T Technology > TJ Mechanical engineering and machinery
Research Area: Computer Science and Applications
Depositing User: Caterina Tangheroni
Date Deposited: 21 Mar 2017 14:13
Last Modified: 21 Mar 2017 14:13
URI: http://eprints.imtlucca.it/id/eprint/3680

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