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.