An analytical model for perforation of ceramic/multi-layered planar woven fabric targets by blunt projectiles

An analytical model has been developed in this paper for perforation of ceramic/multi-layer woven fabric targets by blunt projectiles In previous Chocron-Galvez analytical model the semi-angle of ceramic conoid is constant and the strain rate effects are also neglected in the stress-strain behavior of the yams and only strain energy absorbed by the yarns is considered In this paper which is an Improvement to the Chocron-Galvez analytical model for modeling the fragmented ceramic conoid the Zaera-Sanchez-Galvez analytical model has been used and the semi-angle of ceramic conoid has been modified For modeling the back-up woven-fabric material and deformation of yarns during perforation, the kinetic and strain energy of yarns has been determined In the stress-strain relation of yarns the effect of the strain rate is considered Furthermore a failure model based on the energy absorbed until failure by woven fabric is also used Residual velocity velocity-time history of projectile residual mass of fragmented ceramic conoid, penetration depth until failure of yarns and energy absorbed by woven fabric are all estimated by new analytical model Velocity-time history of the projectile shows a good agreement with the Chocron-Galvez numerical model Also near the ballistic limit velocity prediction of residual velocity of new model is better than Chocron-Galvez analytical model (C) 2010 Elsevier Ltd All rights reserved