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Evaluating the cell structure-impact damping relation of cross-linked polyethylene foams by falling weight impact tests

机译:通过下降重量冲击试验来评估交联聚乙烯泡沫的细胞结构 - 冲击阻尼关系

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摘要

This study examines the effect of foam thickness on impact damping properties of closed-cell cross-linked polyethylene foams of different densities. Compression tests and falling weight impact tests were performed to detect the most important mechanisms, which affect the mechanical properties of the foams. The results showed that impact damping properties are significantly influenced by foam thickness, while energy-absorbing capability primarily depends on foam density. The average cell diameter was determined with a scanning electron microscope, which proved that the mechanical properties are mostly influenced by cell structure because higher density foams have smaller cells and thicker cell walls. Other important conclusion is that a foam thickness limit can be determined for a given load level to avoid excessive compaction of the cells and maximize the shock absorption of the foam.
机译:本研究考察了泡沫厚度对不同密度闭孔交联聚乙烯泡沫冲击阻尼性能的影响。进行压缩试验和落锤冲击试验,以检测影响泡沫机械性能的最重要机制。结果表明,泡沫厚度对冲击阻尼性能有显著影响,而能量吸收能力主要取决于泡沫密度。用扫描电子显微镜测定了平均泡孔直径,证明了高密度泡沫的泡孔较小,泡孔壁较厚,因此其力学性能主要受泡孔结构的影响。另一个重要结论是,可以确定给定荷载水平下的泡沫厚度极限,以避免电池过度压实,并最大限度地提高泡沫的减震性。

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