Numerical simulation of high-velocity impact on fiber-reinforced composites using MAT_162

MAT_162 is an enhanced material model for fiber-reinforced composites implemented in the software LS-DYNA, which considers different failure modes in tension, compression, and shear, with a progressive failure model. It takes into account the strain rate sensitivity of the strength and moduli properties using a logarithmic function. This material model is commonly used in the literature for modeling glass fiber-reinforced composites while only a few studies related to aramid fiber-reinforced composites can be found. Aramid fibers are one of the most common fibers used in the manufacturing of ballistic shields due to their excellent mechanical properties. The scope of this study is to evaluate the accuracy of the material model MAT_162 in simulating high-velocity impact on aramid fiber-reinforced composites. An actual.357 Magnum projectile is impacted at different velocities, and therefore, different scenarios from the arrest of the projectile to the full penetration of the target are considered. MAT_162 is compared with MAT_058, which is a simpler material model that needs less input material parameters and is therefore easier to be implemented. Finally, parametric studies and a mesh convergence analysis are performed.