Ballistic impact analysis of composite laminates

Abstract

newlineComputer simulations have been in use for decades in the modelling of high newlinevelocity impacts and general large deformation problems. Several computer codes newlinehave been developed to simulate this type of problems under a variety of geometric newlineconditions and for any variety of materials. These codes make use of several newlineconstitutive material models as well as damage models to simulate the response of the newlinematerial under a variety of thermo-mechanical conditions. The Johnson-Holmquist 2 newlinemodel has been widely used for the ballistic impact simulations of ceramic targets. It newlinehas been learnt from the literature that the combination of Drucker-Prager model, newlineDuctile Damage and EOS reflects the similar behaviour as observed by the former newlineduring the simulation of high velocity impact on ceramics. So in the present research newlinedynamic material model parameters for Drucker-Prager model, Ductile Damage and newlineEOS has been obtained by comparing it analytically with JH-2 model, so that the newlinegenerality of the Drucker-Prager model can be used and we don t have to follow the newlinespecific expressions of the JH-2 model. newlineIn the current research first of all validation of previous studies is being done newlineto verify the prediction capability of the analytically obtained parameters for the newlineDrucker-Prager model, Ductile Damage and EOS. Then the simulation results from newlinethe JH2 model are compared with the simulation results of Drucker-Prager model, newlineDuctile Damage and EOS to predict that how much realistically the models are newlinereciprocating each other s behaviour and simultaneously the simulation results are newlinecompared with their experimental counterparts to infer the strength as well as depth of newlinepenetration using three different materials viz., Soda-lime glass, High Pressure newlineDensification induced glass and silicon carbide (as used in laminated glass). newlineThickness of the laminated glass is optimized by decreasing the thickness from 50 newlinemm to 41 mm and checking for 50% depth of penetration. After that the mathematical newlineformulations of failure mechanisms are