Author(s)

D. Vinckier & K. Thoma

Abstract

Numerical simulations of high velocity impact phenomena in composite structures D. Vinckier, K. Thoma Fernhag, Germany ABSTRACT A Lagrangian finite element method with explicit time integration is used to simulate high velocity impact and penetration processes into fiber reinforced materials. A material model, originally developed to simulate the crash behavior of high strength UD-fiber-matrix systems in automotive applications, was extended to include fabric prepregs and describes the elastic behavior, failure, and the post-failure behavior up to complete material crushing. The failure model is based on a Tsai-Wu criterion with an added failure mode recognition system. Simulations of the impact of a metallic fragment with 750 m/s on a protective wall with a front layer of high strength steel and three backing layers of fabric prepregs illustrate the capabilities of the model in the design and analysis of lightweight protection systems. INTRODUCTION Contrary to the analysi

Keywords