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We performed the dynamic mechanical investigation of cross-linked polyethylene (XL-PE) foams, which are the most commonly used polymer foams for damping purposes. Our experiments were primarily focused on analyzing the energy-absorbing capability of foams with different densities and studying the relationship between cell structure and shock absorption. The cell structure and energy absorption properties of the foams were determined by mechanical tests and microscopic examination. The samples were subjected to falling dart and falling weight impact tests using different weight geometries and impact energy. Our experiments showed that the impact damping properties of foams are significantly influenced by the deformation mechanisms in the cellular structure during dynamic loading since excessive deformation of the cell walls leads to the compaction of the foam, and therefore a significant reduction in impact damping capability.

Investigation of the energy absorption properties of cross-linked polyethylene foams