NUMERICAL-ANALYSIS OF IMPACT DEFORMATION AND FAILURE IN COMPOSITE PLATES

The analytical problem of transverse impact by a rigid body on a rectangular composite plate is considered. The calculation of displacements, deformations and stresses in conjunction with the characteristics of impact contact interaction is provided. The analysis of transverse stresses arising under short-time impulse in graphite/epoxy and organic glass/polymeric adhesive laminated plates is performed. The results illustrating dependencies of a contact force on time are given for various levels of mass and velocity of the impactor at the prescribed impact energy. The analysis of impact damage zones in a three-ply and a five-ply graphite/epoxy laminate (particularly, having soft polymeric interleaves) is presented for the case of 2-2.5 J impact energy and different mass and velocity combinations. The changing of the failure mode increasing the impactor velocity (decreasing the mass) is followed up.