School of Civil Engineering, Guangzhou University; Guangdong Provincial Key Laboratory of Earthquake Engineering and Applied Technology, Guangzhou University.
School of Civil Engineering, Guangzhou University.
J Vis Exp. 2023 Jan 6(191). doi: 10.3791/64708.
In this study, the quasi-static compression performance of tapered tubes was investigated using finite element simulations. Previous studies have shown that a thickness gradient can reduce the initial peak force and that lateral corrugation can increase the energy absorption performance. Therefore, two kinds of lateral corrugated tapered tubes with variable thicknesses were designed, and their deformation patterns, load displacement curves, and energy absorption performance were analyzed. The results showed that when the thickness variation factor (k) was 0.9, 1.2, and 1.5, the deformation mode of the single corrugated tapered tube (ST) changed from transverse expansion and contraction to axial progressive folding. In addition, the thickness gradient design improved the energy absorption performance of the ST. The energy absorption (EA) and specific energy absorption (SEA) of the model with k = 1.5 increased by 53.6% and 52.4%, respectively, compared with the ST model with k = 0. The EA and SEA of the double corrugated tapered tube (DT) increased by 373% and 95.7%, respectively, compared with the conical tube. The increase in the k value resulted in a significant decrease in the peak crushing force of the tubes and an increase in the crushing force efficiency.
本研究采用有限元模拟方法研究了锥形管的准静态压缩性能。先前的研究表明，厚度梯度可以降低初始峰值力，而横向波纹可以提高能量吸收性能。因此，设计了两种具有变厚度的横向波纹锥形管，并分析了它们的变形模式、载荷-位移曲线和能量吸收性能。结果表明，当厚度变化系数(k)为 0.9、1.2 和 1.5 时，单波纹锥形管(ST)的变形模式从横向伸缩变为轴向渐进折叠。此外，厚度梯度设计提高了 ST 的能量吸收性能。与 k = 0.9 的 ST 模型相比，k = 1.5 的模型的能量吸收(EA)和比能量吸收(SEA)分别增加了 53.6%和 52.4%。双波纹锥形管(DT)的 EA 和 SEA 分别比锥形管增加了 373%和 95.7%。k 值的增加导致管的峰值压溃力显著降低，压溃力效率提高。
