Discrete ply modelling of low velocity impact and compression after impact in unidirectional laminated composites
Résumé
This paper deals with impact damage, permanent indentation and compression after impact (CAI) modelling. A model enabling the formation of damage developing during low velocity / low energy impact test and CAI test in laminated composite panels has been elaborated. The different impact and CAI damage types, i.e. matrix cracking, fibres failure and interfaces delamination, are simulated. This model is compared to experimental tests and is used to highlight the failure scenario of laminate during residual compression test. Finally the impact energy effect on the residual strength is evaluated and compared to experimental results.