1. Modelling of mixed damage on fibre reinforced composite laminates subjected to low velocity impact
- Author
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S Phaneendra, José J. Muñoz, J. L. Curiel Sosa, Universitat Politècnica de Catalunya. Departament de Matemàtica Aplicada III, and Universitat Politècnica de Catalunya. LACÀN - Mètodes Numèrics en Ciències Aplicades i Enginyeria
- Subjects
Engineering, Civil ,Materials science ,Computation ,Composite number ,Elements finits, Mètode dels ,Computational Mechanics ,Engineering, Multidisciplinary ,Enginyeria dels materials [Àrees temàtiques de la UPC] ,Matemàtiques i estadística::Anàlisi numèrica::Mètodes en elements finits [Àrees temàtiques de la UPC] ,Stress (mechanics) ,Materials -- Propietats mecàniques ,Convergence (routing) ,Laminated composites ,General Materials Science ,Engineering, Ocean ,Composite material ,Engineering, Aerospace ,Engineering, Biomedical ,business.industry ,Mechanical Engineering ,Delamination ,Structural engineering ,Composite laminates ,Computer Science, Software Engineering ,Engineering, Marine ,Finite element method ,Engineering, Manufacturing ,Engineering, Mechanical ,Mechanics of Materials ,Engineering, Industrial ,business - Abstract
This article presents a numerical technique for the computation of damage in fibre-reinforced laminated composites which is embedded into an explicit finite element method. The technique is composed of two main components. First, a novel characterisation of the directions in which the various modes of damage propagate, which produces an effective damage localisation. This is conducted taking into consideration the strain-rate dependence. Second, a new mapping between the strain and stress spaces for the computation of the damage surfaces whereby time-stepping convergence is enhanced. Additionally, new damage initiation criteria in terms of strain damage surfaces are presented. Details of the in-house code developed are presented as well as the programming features. The capabilities of the technique are shown by means of tests on single fibre-reinforced element and low velocity impact on the laminate. It is shown that delamination is located in the expected regions by gradual progression of internal damage variables.
- Published
- 2012
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