Modeling the Response of Multi-layered Multi-material Targets Using ALE-Based Finite Element Methods

Modeling ballistic impacts in high-ductility materials requires techniques to handle large mesh distortions that occur during projectile penetration. Arbitrary Lagrangian–Eulerian (ALE)-based finite element (FE) methods can be used to model such behaviors while maintaining the accuracy of material damage and failure evolution. The ALE3D software, developed by Lawrence Livermore National Lab, is used in this work to solve 3D ballistic impacts on a multilayered target containing either polymer/polymer or polymer/metal variations in different layout configurations. The aim was to simulate and capture the extreme deformation observed in the multilayer configurations with respect to each individual layer’s distortion and the multilayer target as a whole. Simulations were validated against experiments conducted on various individual and multilayered targets. Failure modes of the materials were analyzed and compared to FE models. Further investigation was made to identify the multilayer material layout that provided the optimal kinetic energy dissipation and deformation failure modes under impact.

PRESENTER

Luckett, DeBorah C.
deborah.c.luckett@erdc.dren.mil
769-257-2232

ERDC

CO-AUTHOR

Bowman, Andrew
Andrew.L.Bowman@erdc.dren.mil

CATEGORY

Computational Chemistry & Materials

SYSTEMS USED

Carpenter

SECRET

No