The energy absorption behavior of nested tubes under lateral loading conditions was investigated in this study. Nested tubes are considered as an alternative to energy absorption structures used in many industries including automotive, military, and aerospace. Steel tubes with the same wall thickness and different diameters were used in the experiments. First, experiments of single tubes were carried out, and the deformation behavior of tubes under lateral load was examined in detail. Afterward, experiments were carried out on nested tube samples in which a minimum of 2 and a maximum of 6 tubes were used together in different numbers and sequences. It was seen from the experiments that the best-nested tube configuration in terms of energy absorption capacity was the sample that contains 6 tubes with 1767 J. While this sample absorbed 5% higher energy than the sample with 5 tubes, the specific energy absorption value was calculated to be 10% lower. Additionally, the sample with 6 tubes has a value of 43% in terms of energy efficiency which is 7% lower compared to that of the sample with 5 tubes. It was determined that the sample with 5 tubes yielded the most efficient design when specific energy absorption capability, work effectiveness, and energy efficiency parameters were considered.

本研究研究了嵌套管在侧向载荷条件下的能量吸收行为。嵌套管被认为是许多行业（包括汽车，军事和航空航天）中使用的能量吸收结构的替代方案。实验中使用了具有相同壁厚和不同直径的钢管。首先，进行了单管实验，详细研究了在横向载荷下管的变形行为。之后，对嵌套试管样品进行实验，其中最少2个试管和最多6个试管以不同的数量和顺序一起使用。从实验中可以看出，就能量吸收能力而言，最嵌套的试管配置是包含6个1767 J试管的样品。尽管此样品吸收的能量比带有5个试管的样品吸收的能量高5％，但计算得出的比能量吸收值却降低了10％。此外，具有6个试管的样品的能效值比43个具有5个试管的样品低43％。当考虑到特定的能量吸收能力，工作效率和能效参数时，可以确定具有5个试管的样品是最有效的设计。