Crashworthiness analysis of double section bi-tubular thin-walled structures

This article aims to present the crashworthiness performance of double section bi-tubular thin-walled structures. Double section bi-tubes were made from stainless steel sheet and consist of an outer circular cylinder and an inner tube with any one of polygonal section such as triangle, square or hexagon. By keeping the outer cylinder dimensions constant, the effect of changes in the inscribed diameter of polygonal section and the various polygonal section of the inner tube on quasi-static axial compression is studied. Bi-tubular structures with hexagonal inner tube have more energy absorption capability than the other bi-tube combinations and the single cylinder.