Development for the Material Constitutive Model of the Polymer Ortho Fabric under the Hypervelocity Impact Condition

A linearly Orthotropic Constitutive Model with maximum tensile stress failure criterion was developed by Secondary Development Kit of LS-DYNA software, and was coupled with Gruneison equation of state to describe the mechanic behaviors of Polymer Ortho Fabric under the hypervelocity impact condition. Smoothed Particle Hydrodynamics and 3D Finite Element Method are used to create a numerical analysis model to simulate a Pyrex spherical projectiles impacting Nylon Ortho Fabric and Al-1100 witness plate at 7.43km/s, which condition is as same as a test´s condition of NASA. A serious of parameters´ values was set in the numerical analysis model, including the parameters of constitutive model, equation of state, and failure criterion. Compared the results between simulation and test, it shows that the developed material constitutive model and the numerical analysis model are suitable to describe the hypervelocity impact behaviors of Polymer Ortho Fabric.