泡沫铝层合圆管纵向和横向压缩力学性能研究

用碳化硅颗粒增强泡沫铝为夹芯,不锈钢圆管为面板制备层合圆管,研究了层合圆管在准静态压缩条件下的纵向和横向变形行为和能量吸收性能.研究表明,层合圆管的纵向压缩变形方式与空管相比发生了改变,由不对称变形模式变为轴对称变形模式;载荷-位移曲线平台段锯齿形波动与曲屈圈的形成呈现对应关系;层合圆管纵向和横向的吸能能力均远大于不锈钢圆管和泡沫铝吸收的能量之和,并且随着应变的增加,层合圆管的吸能能力增加更为快速;层合圆管在保持泡沫铝轻质的同时,在纵向和横向两个方向上均大幅度提高泡沫铝的吸能能力.

Transverse and longitudinal crushing of aluminum-foam filled tubes

The aluminum foam filled fubes were prepared by using stainless steel tube as shell and SiC particle-reinforced aluminum foam as core and then the transverse and longitudinal deforming and energy absorption behavior of the tubes under quasi-statistic compression were studied.The results indicate that the longitudinal deforming mode of the foam-filled tube changes from "diamond mode" to "concertina mode";The plateau region of the load-displacement curve exhibits a marked serration which is clearly related to the formation of the cylinder folds.The transverse and longitudinal energy absorption ability of foam-filled tubes are generally found to be much higher than the sum of the energy absorption ability of foam and tube alone,and the energy absorption ability of the foam-filled tube increases more quickly as the strain increasing.Energy absorption ability of the foam-filled tube is much higher than that of aluminum foam,keeping lightweight at the same time.