Effects of Matching Conditions Between Crocheted Mesh Tube and Metal Tube on Crushing Behaviour and Energy Absorption of Interlayer Tubes

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.