Investigating the Effect of Delamination Size and Shape on Laminated FRP Composites under Vibration Loading

A. Pareta[1], S. Panda[1]
[1]IIT (BHU), Varanasi, India
Published in 2019

Fiber Reinforced Polymer (FRP) laminated composites have extensive application in the field of aerospace, marine, sports, bio-medical and lot more. FRP is mostly utilised for its high strength to weight ratio. Since, its failure is catastrophic in nature. There is need to study its failure mechanism.  From the previous studies it is found that he most critical defect to the laminate composite is delamination. This delamination degrade its strength and stiffness to much greater extent and leads to catastrophic failure. In this investigation the effect of delamination size and shape on natural frequency of composite laminate using  COMSOL Multiphysics® . The investigation reveals the reduction in natural frequency with the increment in size of delamination. The study also suggests, the shape of delamination contribute its significant effect on natural frequency.