A new collaborative study was recently published in the the Journal of Applied Polymer Science to show how factors that affect the viscoelastic fatigue response of flexible polymeric foams.
Citation:
Foster, Moira M., Morrison, Daniel C., Landauer, Alexander K., Herynk, Mark D., and Lamberson, Leslie E. Assessment of frequency and amplitude dependence on the cyclic degradation of polyurethane foams. United States: N. p., 2024. Web. doi:10.1002/app.55846.
polyurethane foam pads which inspired this study are used in the United States military's advanced combat helmet to protect against traumatic brain injury. The viscoelastic properties of these materials enable them to be used for effective energy absorption in specific dynamic environments.4-7 Once deployed in an application, foams undergo mechanical stresses including shocks and repetitive low-rate compressions. It is important that the material will continue to perform in the same manner during and after exposure to these repetitive mechanical excitations.
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