On composite materials response subjected to impact loading numerical simulation and experimental validation

Efthimios G. Giannaros (University of Patras)

The constant requirement of aerospace and space industries to enhance the structural efficiency as well as the increasing need to protect people and structures from various threats including explosions and collisions have driven to the usage of high-performance materials. Composite materials belong to that category due to their high specific stiffness and strength. However, they present some disadvantages such as their high raw material cost, the complexity of manufacturing, the difficulty in repairing as well as the susceptibility to impact damage and ply separation. This vulnerability of composites can result significant damage or even perforation which will lead to the degradation of their post-impact residual strength. In some specific applications including the defence protection systems and space shields, paraaramid fabric materials are often used either as reinforcement in composites for delamination and impact resistance or as pure dry fabric layers for protection from fragments. The current thesis focuses on the numerical prediction of mechanical behavior of composites and dry fabric materials to impact loading.