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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机译：本文介绍了未原始（U-PUF）和增强（R-PUF）聚氨酯柔性泡沫的制造方法和机械性能。为了获得新型的增强聚氨酯复合泡沫，使用0.5％（泡沫液质量）铝微纤维量。通过准静态压缩试验在室温下进行U-PUF和R-PUF泡沫的机械表征。压缩试验在具有10mm / min的加载速度的立方试样上进行。所得和研究的泡沫显示为150kg / m 3的密度。结果发现，与U-PUF泡沫相比，新的获得的R-PUF泡沫在压缩期间逐渐粉碎，并显示出更高的机械性能（根据压缩模量，屈服应力，高原应力和致密化菌株）。特别注意泡沫挤压性能。实验结果表明，铝微纤维显着提高了压缩中的泡沫能量吸收能力。
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