Numerical research on the effect of impactor shape and core characteristics on the ballistic impact response of marine sandwich composite plates

Abstract

The dynamic response of composite plates to impactors of different shapes is investigated. In this paper simulation of the responses of several composite sandwich plates made of glass fiber skins and cores made of polypropylene honeycomb as well as foam 81 are subjected to impact dynamic loads of steel impactors of shapes flat, hemi spherical and conical are evaluated and compared. The kinetic energy loss of the projectile during the impact is the criteria used to compare the different types of impactors. Also comparative analysis of sandwich composite plates made of honeycomb core and foam core is done. It is also found that target energy absorption value changes during the impact process when the layer angle of the glass fiber skin changes. The numerical analysis was performed using FEM (ANSYS software).