摘要
对两种AA 6063T6铝合金薄壁空管(方/圆管)结构以及填充泡沫铝的5种不同几何截面的薄壁夹芯管(单方/圆管填充,双方/圆管填充,双方管四角填充结构)分别进行了准静态轴向压缩实验,研究了各种薄壁结构的变形模式和吸能性能,比较了反映不同结构耐撞性的各种参数,如比能量吸收和能量吸收效率因子等。同时,研究了各种填充结构的几何参数对结构耐撞性能的影响,发现填充结构内管的尺寸对结构的耐撞性影响显著。研究结果显示,圆管类型的结构平均压垮载荷、比质量能量吸收、单位行程能量吸收以及能量吸收效率因子都较方管类型结构高。泡沫填充单/双圆管结构由于其较高的压垮力效率和能量吸收效率,能够较平稳高效地吸能,作为耐撞性结构元件具有很大的优势。
Quasi-static axial compression tests were conducted on two types of empty aluminum alloy tubes （circular and square） and five types of aluminum foam filled tube structures （foam-filled single circular and square tubes, foam-filled double circular and square tubes and corner-foam-filled square tube）. The load-deformation characteristics, deformation mode and energy absorption ability of thesethin-walled structures were investigated. Several parameters related to their crashworthiness were compared, including the specific energy absorption, the energy-absorbing effectiveness factor, etc. The influence of physical dimension on the crashworthiness of these structure was explored. It is found that the dimension of inner tube has significant influence on the structural crashworthiness of foam-filled double tube structures. The averaged crush force, the specific energy absorption, theenergy per stroke and the energy-absorbing effectiveness factor of thin-walled circular structures are higher than those of the thin-walled square structures, respectively. Foam-filled single and double circular tube structures are recommended as crashworthy structures due to their high crush force efficiency and energy-absorbing efficiency.
出处
《实验力学》
CSCD
北大核心
2012年第1期77-86,共10页
Journal of Experimental Mechanics
基金
国家自然科学基金(90916026)
中国科学院创新工程方向项目(KJCX2-EW-L03)
国家科技支撑计划项目(2009BAG12A01-B02-2)资助
关键词
薄壁管
轴压
耐撞性
能量吸收效率因子
实验研究
thin-walled tube
axial compression
crashworthiness
energy-absorbing effectivenessfactor
experimental investigation
