This paper focuses on comparing the quasi-static crushing mechanical behaviour and energy absorption characteristics of four types of interlayer tubes formed by combining mesh tube and 304 tube with two different interface matching methods (tight fit and metallurgical bonding). The deformations and energy absorptions of interlayer tubes are still dominated by 304 tube. The mesh tube and metallurgical points are able to induce and improve the deformation of 304 tube by changing its axial crushing stress state, thus, affecting the shapes and quantities of its folds, changing its deformation behaviours and modes, and finally forming interlayer tubes with different mechanical behaviours and energy absorption characteristics. The tight fit interlayer tubes exhibit better mechanical behaviour and energy absorption compared with the hollow 304 tube. The sintering interlayer tubes matching by metallurgical bonding can further improve the mechanical behaviours and energy absorptions of interlayer tubes and present more stable crushing deformations and stronger bearing capacities. It is an effective method to improve the mechanical behaviours and energy absorption characteristics of interlayer tubes by changing interface matching modes.

中文翻译：

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钩编网管与金属管的匹配条件对夹层管的破碎行为和能量吸收的影响

本文着重比较通过两种不同的界面匹配方法（紧密配合和冶金结合）将网状管和304管组合而成的四种类型的夹层管的准静态破碎力学行为和能量吸收特性。夹层管的变形和能量吸收仍然由304管控制。网格管和冶金点可以通过改变其轴向压应力状态来诱发和改善304管的变形，从而影响其褶皱的形状和数量，改变其变形行为和方式，最终形成具有不同形状的夹层管。机械性能和能量吸收特性。与空心304管相比，紧配合夹层管具有更好的机械性能和能量吸收。通过冶金结合匹配的烧结夹层管可以进一步改善夹层管的力学性能和能量吸收，并具有更稳定的破碎变形和更强的承载能力。通过改变界面匹配方式，是改善夹层管力学性能和能量吸收特性的有效方法。