This study investigates the crashworthiness performance of multi-walled (spiral) tubes fabricated by roll bending aluminium alloy sheets. Quasi-static axial crushing tests of specimens were first conducted, and then numerical models were built to simulate the tests using the explicit non-linear finite element code LS─DYNA. After the experimental validation of the numerical simulation, a new series of conventional (closed-section) circular tube models of the same axial length, mean diameter, and cross-sectional area as those of the corresponding spiral models were built for comparison. The deformation patterns of the spiral tubes were found to be virtually the same as those of the closed-section tubes and despite being substantially open-section shells, those with more than two spirals collapsed progressively for crushing lengths that corresponded to 2/3 of their axial length. Moreover, the specific energy absorption, the energy absorption per spiral and the crush force efficiency of the tubes examined improved with respect to the number of spirals reaching peak values for around three to four spirals.

这项研究调查了通过弯曲铝合金板制造的多壁（螺旋）管的耐撞性能。首先进行了样品的准静态轴向压碎试验，然后使用显式非线性有限元代码LS─DYNA建立了数值模型来模拟试验。经过数值模拟的实验验证后，建立了一系列新的常规（封闭截面）圆管模型，它们的轴向长度，平均直径和横截面积与相应的螺旋模型相同，以进行比较。发现螺旋管的变形方式实际上与封闭截面管的变形方式相同，尽管是基本上开放截面的壳体，那些具有两个以上螺旋的弹簧逐渐塌陷，其破碎长度相当于其轴向长度的2/3。此外，相对于达到大约三到四个螺旋的峰值的螺旋数量，所检查的管的比能量吸收，每个螺旋的能量吸收和压碎力效率得到改善。