Preparation and Properties of Polyurethane/Aluminum Foam Composites
To prepare a polyurethane/foam aluminum shock absorption composite(PU-AF)with recoverable damping mechanism.Study the damping mechanism of PU-AF shock-absorbing composite materials;The influence of foam aluminum bulk density on the static compression mechanical properties and energy absorption properties of PU-AF.The method involves conducting monotonic/cyclic compression tests on the prepared PU-AF composite material on a universal material testing machine,and studying the damping mechanism and energy absorption performance of the composite material through stress-strain curves.When the bulk density of foam aluminum was 0.70-0.85 g/cm3,the yield strength and elastic modulus of PU-AF composites increased with the increase of the bulk density of foam aluminum at the same strain value.The energy absorption efficiency decreases after reaching a strain of 30％,and the optimal strain range for energy absorption efficiency is between 25％and 35％.Polyurethane can significantly improve the strain recovery rate of composite materials;PU-AF is a good shock-absorbing composite material.
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