Abstract

In this paper, a parametric study has been conducted on aluminum tubes with axially half corrugations. These corrugated tubes have been known for their uniform force-displacement curves as well as their capacity to absorb more energy. To do so, first, the numerical results of 4 tubes have been validated using the results from the quasi-static experiment. Then, the effects of changing the geometrical characteristics have been looked into. The variable geometrical characteristics are number of corrugations and their lengths. Three different levels for the number of corrugations as well as three for lengths have been considered. Among the nine models achieved, some models were found with much more efficient energy absorption. Subsequently, the impact of utilizing corrugations at both ends of the tubes has been investigated as well. By this exploitation, a considerable surge has been seen in the amount of absorbed energy among tubes. In the end, in order to have one best model, complex proportional assessment has been employed (COPRAS), by which, under three circumstances, i.e. results from axial crushing, oblique crushing, and considering both results, the best tube was chosen.

摘要

在本文中，对具有轴向半波纹的铝管进行了参数研究。这些波纹管以其均匀的力-位移曲线以及吸收更多能量的能力而闻名。为此，首先，使用准静态实验的结果验证了 4 个管的数值结果。然后，研究了改变几何特征的影响。可变的几何特征是波纹的数量和它们的长度。已经考虑了波纹数量的三个不同级别以及长度的三个级别。在所实现的九个模型中，发现一些模型的能量吸收效率更高。随后，还研究了在管子两端使用波纹的影响。通过这种开发，可以看到管之间吸收的能量有相当大的激增。最后，为了得到一个最佳模型，采用了复杂比例评估法（COPRAS），在三种情况下，即轴向压碎、斜向压碎的结果，并综合考虑这两种结果，选择了最佳管子。