A non-linear orthotropic hydrocode model for ultra-high molecular weight polyethylene in impact simulations

• Test methods for a full experimental characterization of a UHMWPE composite.
• Quasi-static and dynamic testing of a UHMWPE composite.
• Hypervelocity impact experiments on a UHMWPE composite.
• Predictive modeling of a UHMWPE under ballistic impact.
• Non-linear material model including elasticity, plasticity, failure and softening.

This paper presents detailed experimental characterization of quasi-static anisotropic directional strength properties as well as the shock behavior of ultra-high molecular weight polyethylene (UHMWPE) for the development of an advanced material model for this class of materials. Specifically, we consider Dyneema® HB26 – pressed from uni-directional (UD) tapes in a 0/90° stacking sequence. A material model based on a constitutive law with orthotropic, non-linear strength, shock response, composite failure and softening criteria is presented. A set of material parameters is derived for applications in hydrocodes (here: ANSYS AUTODYN). High- and hypervelocity impact tests with different impact velocities are used for preliminary validation and discussion of the predictive capabilities in view of future application.