Abstract
The general trend in modern aircraft structures is the progressive replacement of metallic materials with composites, because of their superior structural properties. One of the typical failure modes of composite materials is interlaminar delaminations that degrade structural capacity and are prone to grow when compression and out-of-plane loads are applied to the structure. Bonded joints are quite often used in composites structures. These joints are complicated to analyse even for a simple strength prediction (high stress concentrations at its ends), of course progressive debonding is particularly complicated to simulate. The lack of accurate and reliable simulation methodologies for both problems, and the not-enough knowledge of the real damage mechanics in composites lead to conservative designs. Instituto Nacional de Técnica Aeroespacial (INTA), the Spanish research centre for aerospace is developing reliable simulation techniques for composites structural behaviour in the presence of damages such as interlaminar delaminations and debondings. These are able to perform Progressive Failure Analysis (PFA), are efficient from a computational point of view, and correct mesh size effects.
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Millán, J.S., Armendáriz, I. (2015). Delamination and Debonding Growth in Composite Structures. In: Riccio, A. (eds) Damage Growth in Aerospace Composites. Springer Aerospace Technology. Springer, Cham. https://doi.org/10.1007/978-3-319-04004-2_3
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DOI: https://doi.org/10.1007/978-3-319-04004-2_3
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