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卢子兴 赵亚斌 陈伟 谢若泽. 金属泡沫填充薄壁圆管的轴压载荷-位移关系[J]. 力学学报, 2010, 42(6): 1211-1218. DOI: 10.6052/0459-1879-2010-6-lxxb2009-190
引用本文: 卢子兴 赵亚斌 陈伟 谢若泽. 金属泡沫填充薄壁圆管的轴压载荷-位移关系[J]. 力学学报, 2010, 42(6): 1211-1218. DOI: 10.6052/0459-1879-2010-6-lxxb2009-190
Relation of load and displacement for the metal foam-filled tube during the axial compression[J]. Chinese Journal of Theoretical and Applied Mechanics, 2010, 42(6): 1211-1218. DOI: 10.6052/0459-1879-2010-6-lxxb2009-190
Citation: Relation of load and displacement for the metal foam-filled tube during the axial compression[J]. Chinese Journal of Theoretical and Applied Mechanics, 2010, 42(6): 1211-1218. DOI: 10.6052/0459-1879-2010-6-lxxb2009-190

金属泡沫填充薄壁圆管的轴压载荷-位移关系

Relation of load and displacement for the metal foam-filled tube during the axial compression

  • 摘要: 将泡沫填充圆管的能量吸收视为泡沫与圆管两者之和, 基于包含偏心率效应的直链塑性铰模型和Reddy等对Alexander模型的改进结果, 对圆管的变形模式进行了更改, 以此来反映管壁与金属泡沫之间的相互作用效应, 导出了金属泡沫填充圆管的静、动态轴向平均压溃力的表达式. 通过理论预测与实验的对比, 发现理论预测偏低, 但与实验曲线的趋势保持一致, 比空管与金属泡沫的平均载荷之和略高一些. 此外, 泡沫填充圆管的平均压溃力随填充泡沫平台应力的增大而呈线性增加, 与已有研究结果及实际情况一致, 由此表明了模型的合理性.

     

    Abstract: The energy absorption of metal foam-filled tube wasregarded as the sum of that of metal foam and tube. Based on the straightchain plastic hinge model including the effect of eccentricity and theimproving results of Alexander model by Reddy and Wall, the deformation modeof tube was modified to reflect the effect of interaction between tube walland metal foam. Then, the expressions for the mean crushing force of staticand dynamic axial compression of metal foam-filled tube were derived. By thecomparison between theoretical prediction and experiments, the resultspredicted theoretically were found to be lower than experimental curve butagree well in the tendency, and slightly higher than the sum of averageloads of tube and metal foams. In addition, as the plateau stress of thefilling foam increases, the average compressive load of foam-filled tubeimproves linearly. This is consistent with the existed results and actualsituation, proving the rationality of the model in this paper.

     

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