Cylindrical Impacts on GLARE 5 Plates with Open Hole

The present paper investigates interfacial delamination in a GLARE fibre metal laminate having a central circular hole under multiple low-velocity impacts (LVIs) by cylindrical impactors. A full 3D finite element (FE) formulation is developed for analysing the response of GLARE under multiple cylindrical impacts using Hertzian contact law, and Newmark-beta method is used for transient dynamic solution. Stresses and strains obtained from the FE analysis are used to assess the interfacial delamination. Influence of important parameters like length and radius of impactor, order of occurrence and location of impact on the extent of delamination have been studied. Results from the present analysis indicate that the outer aluminium thickness and impact interval between the successive impacts greatly influence the magnitude of contact force as well as delamination at the fibre-metal interfaces which initiates at free edges along the periphery of the hole.

Automated summary

This paper investigates the interfacial delamination in a GLARE fibre metal laminate with a central circular hole under multiple low-velocity impacts. The results from finite element analysis show that the thickness of the outer aluminium layer and the impact interval have significant influence on the extent of delamination.