Deformation and energy absorption of aluminum foam-filled tubes subjected to oblique loading
Deformation and energy absorption of aluminum foam-filled tubes subjected to oblique loading
复制标题
斜载下泡沫铝填充管的变形与吸能
DOI：
10.1016/j.ijmecsci.2011.09.006
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发表时间：
2012-01-01
影响因子：
7.3
通讯作者：
Guo, Liuwei
中科院分区：
文献类型：
--
作者：
Li, Zhibin;Yu, Jilin;Guo, Liuwei
研究了空圆管和泡沫填充圆管在不同加载角度和几何参数的斜向载荷作用下的吸能特性。对AA6063铝合金圆管进行了轴向和斜向准静态加载试验。研究了空的、泡沫填充的单管和双管在相对于管的纵向方向成0 °、5 °、10 °和15 °的加载角下的塌陷行为。将管两端固定，通过在一对试样的上端施加载荷来实现斜向载荷。在斜向准静态荷载作用下，泡沫填充圆管结构出现了螺旋折叠、不规则拉伸折叠、不规则轴对称变形或菱形变形等新的变形模式，这些变形模式是由于圆管的弯曲、泡沫填充物的剪切以及圆管与泡沫之间的相互作用引起的。确定了空管和泡沫填充单、双管结构的能量吸收特性随载荷角和壁厚的变化规律。结果表明，泡沫铝芯圆管结构的吸能有效因子显著高于空圆管结构，泡沫填充双管结构的吸能能力优于空圆管和泡沫填充单管结构。(C)2011爱思唯尔有限公司保留所有权利。
Research to quantify the energy absorption of empty and foam-filled tubes under oblique loading with different loading angles and geometry parameters was carried out. Tests on circular tubes made of aluminum alloy AA6063 under quasi-static axial or oblique loading were performed. The collapse behavior of empty, foam-filled single and double tubes was investigated at loading angles of 0 degrees, 5 degrees, 10 degrees and 15 degrees with respect to the longitudinal direction of the tube. The tubes were fixed at both ends and oblique load was realized by applying a load at the upper end of a pair of specimens. When the foam-filled tubular structures subjected to oblique quasi-static loading, some new deformation modes, such as spiral folding mode, irregular extensional folding mode and irregular axi-symmetric or diamond deformation mode, were identified and ascribed to the bending of tubes and shearing of foam filler, as well as the interaction between the tubes and the foam. The energy absorption characteristics of empty and foam-filled single and double tube structures with respect to the load angle and wall thickness are determined. It is found that the energy-absorbing effectiveness factors of the circular tube structures with aluminum foam core are significant higher than those of the empty tubes and the energy absorption capacity of the foam-filled double tubes is better than that of the empty and foam-filled single tubes. (C) 2011 Elsevier Ltd. All rights reserved.