GUR1050 is a medical grade variety of ultra-high molecular weight polyethylene (UHMWPE) intended for use on total joint prosthesis and implants. Probes of this material were characterized on a compression test following ASTM norms and lineaments. Available data from these mechanical tests is fitted on multiple material models. Achieved results on numerical solutions of finite element modeling (FEM) of the tests are discussed, looking for the best one available in order to simulate with accuracy GUR1050 behavior, with specific interest on the load curve results, showing the pertinence of using certain models on different conditions. It was found that the use of a bilinear isotropic hardening model assures the best fit for GUR1050 behavior in uniaxial compression under a constant strain rate.

Energy absorption and dissipation are characteristics that can be used to protect and extend the useful life of many systems. Two new models of shock absorption structures are proposed. These are based on honeycomb cell patterns with inherent negative stiffness, in theory enabling a large amplification of their damping and recoverability capabilities within a limited space. A 2D finite element analysis (FEA) is carried on as a first approach for testing this concept. The reduction of kinetic energy of a falling block above the structure is taken as the main indicator of energy absorption. After some verifications 3D models are developed and tested analogously. Numerical results are obtained with polyethylene (PE) material properties, looking forward for development of future applications in biomechanics.