Abstract
This paper presents a manufacturing method and mechanical behavior of unreinforced (U-PUF) and reinforced (R-PUF) polyurethane flexible foams. In order to obtain a new type of reinforced polyurethane composite foams, an amount of 0.5% (of the foam liquid mass) aluminum microfibers were used. The mechanical characterization of both U-PUF and R-PUF foams was carried out at room temperature through quasi-static compression tests. The compression tests were performed on cubic specimens with a loading speed of 10 mm/min. The obtained and investigated foam showed a density of 150 kg/m3. It was found that the new obtained R-PUF foams crushes progressively during compression and shows higher mechanical properties (in terms of compressive modulus, yield stress, plateau stress and densification strain) compared to U-PUF foam. Particular attention was given to the foam crush performances. Experimental results indicated that aluminum microfibers significantly improve the foam energy absorption capabilities in compression.
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