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Modelling of damage and failure of glass/epoxy composite plates subject to impact fatigue |
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| Authors: | K Azouaoui S Rechak Z Azari S Benmedakhene A Laksimi and G Pluvinage |
| Affiliation: | a Laboratoire de Mécanique Avancée (LMA), Département de Génie Mécanique, Université des Sciences et de la Technologie Houari Boumediene (USTHB), B.P. 32 El-Alia 16111, Bab-Ezzouar, Algiers, Algeria b Département de Génie Mécanique, Ecole Nationale Polytechnique, 1 rue Hacen Badi El-Harrach, Algiers, Algeria c Faculté de Mathématique et d'Informatique, Université de Picardie, F-80039 Amiens, France d Laboratoire de Génie Mécanique — Polymères et Composites, Université de Technologie de Compiègne, LG2ms URA CNRS 1505, B.P. 649, F-60200 Compiègne Cedex, France e Laboratoire de Fiabilité Mécanique, Université de Metz–ENIM, F-57045 Metz, France |
| Abstract: | An investigation has been carried out to study the impact fatigue damage of glass/epoxy laminated composites. Accumulation of damage, such as matrix cracking, delamination and fibre breakage, with repeated impact of the composite material may reduce the overall stiffness. These damage modes have been combined in a very complicated way to describe damage growth and fracture. A model is proposed for characterising the damage as a function of the normalised impact number. The scalar variable D, which characterises the material damage, is written as a function of the life duration β, using a modified form of the Mankowsky empirical law Int J Solids Struct 32(11) (1995) 1607]. The macroscopic failure mode and the internal damage in laminated specimens of glass/epoxy as a consequence of impact fatigue are analysed at different levels of incident impact energy. The impact fatigue tests have been conducted on an apparatus built in our laboratory. |
| Keywords: | Damage Glass/epoxy Impact fatigue Photomicrography Delamination |
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