泡沫铝作为抗冲击及减震材料,很多场合都要经受冲压变形.目前,关于泡沫铝在压缩过程中表现出的应变率效应说法不一.概述了应变率对泡沫铝压缩性能的影响,结果表明,由于泡孔的变形特性使泡沫铝具有明显的应变率效应,泡孔在变形过程中的局部化、微观惯性和致密化是其对应变率敏感的根本原因.在高应变率下,滞留气体对闭孔泡沫铝的压缩有一定影响,开孔泡沫铝对应变率的敏感度还未有统一结论.
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