Enhancement of impact resistance of a composite laminate subjected to low velocity impact by adding a graphene layer
摘要
The aim of this paper is to analyse the low velocity impact of a composite laminate having a layup of [+ 453/03/ − 453/03]s through computational studies. The objective of this work is to predict and improve the impact resistance of the laminate for two possible boundary conditions. The analyses are carried out for a pristine plate and a plate having a square shaped embedded delamination of size 14 mm × 12 mm between the sub-laminates 6 and 7, with and without the presence of a graphene layer of 1 mm thick placed on top of the top most sublaminate which is to be hit by an impactor. The presence of delamination is checked for 1–10% of imperfection factors. Further for 1% imperfection factor, analyses were carried out with various thicknesses of graphene layers before arriving at suitable size of graphene to enhance the impact resistance. In the current work, the laminate of an experimental model is investigated under low velocity impact load using Hashin’s criterion along with cohesive surface interaction. Computational works are carried out in Abaqus Explicit software. Parametric study showed their influence on the impact resistance which enhanced enormously when a graphene layer is added on the top of the laminate.