Assessment of deformation pattern and energy absorption capacity of a novel fourfold-tube nested system under oblique impact loading

摘要

The present research treats the crush behavior and energy absorption response of a novel nested tube system as an energy absorber subjected to the oblique compression process. It is evident that in the quasi-static load process, the foam-filled nested tube system is preferable as impact energy absorber due to their capability to withstand oblique load (load angle <10°) as effectively as lateral impact load. In the dynamic load process, the empty nested tube system can withstand oblique load (load angle <30°) as effectively as the lateral impact load. Furthermore, it is found that with the increase of the load angle, the nested tube system can automatically adjust the roles of the inner tubes to get the best deformation mode and energy absorption capability.