Ballistic Impact Analysis of Thin Shell and Curved Surface against Different Projectile Nose Shape

Abstract

Abstract: Numerical simulations are increasingly becomingan important tool to obtain efficient designs of protectivestructures, and the existing literature shows that manyphenomena can be accurately described by standard methodsand models. This thesis, specifically, focuses on novelmethods of modeling and simulating ballistic impact.Experiments are needed to validate such simulations, so numerous tests were studied to investigate how projectile nose-shape, plate layering, target strength, ductility, and workhardening affect the penetration and perforation behavior of various structural configurations. These tests provide new information about the behavior of materials subjected to ballistic impact, and are valuable input for the evaluation ofthe numerical simulations. As more complex materialssystems are introduced in engineering practice, the design engineer faces the of utilizing homogenization techniques or detailed numerical models. The latter offers a number of advantages, such as the ability to introduce separateconstitutive laws and failure criteria for each phase, at theexpense of computation cost. The aim of this study is to givegeneral information about the most commonly used materialsand ballistic test methods. In addition, to summarize the topicsrelated to simulation methods such as FEM and numericalmethods which are use most in ballistics.A generalizednumerical and experimental formulation is presented for theprediction of ballistic impact behavior on various surfacesagainst different projectile nose shape. The ballistic resistance,failure mechanism and the energy absorption of the structurewas investigated thoroughly through experimentation andnumerical simulations. influence of projectile shape, incidencevelocity of the projectile.