针对较低密度开孔泡沫的正四面体模型,通过引入支柱结点处的体积修正使新模型能够用于预测较大密度范围内的泡沫材料的蠕变性能,并且基于该修正模型,分析了斜支柱的弯曲变形机制以及剪切变形机制对蠕变应变率的影响.结果表明:当泡沫材料的相对密度较低时,支柱的弯曲变形机制决定了其蠕变速率;而当相对密度较高时,支柱的剪切变形作用机制开始主导其蠕变速率.通过与实验结果的比较验证了本文预测的有效性.
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