Crashworthiness analysis of single and bi tubular thin walled structures

Abstract

With the fast development of transportation sectors such as newlineautomobile, railway, and aerospace engineering, the energy absorption newlinecapacity of vehicles and structures play more and more important role in newlineoccupant safety and systems protection. Designing of crashworthy vehicles is newlineone of the challenging tasks for the designers in the automotive industry. newlineEnergy absorbing elements (e.g., bumpers, shotguns, side rails) are mainly newlineresponsible for providing the safety of both the passengers and the critical newlinevehicle components. These energy-absorbing devices can dissipate kinetic newlineenergy in a wide variety of ways like friction, fracture, plastic bending, newlinecrushing and cyclic plastic deformation.Although many different types of energy absorbers exist, the thinwalled tubes are considered one of the most efficient energy absorbing newlinedevices, because they absorb kinetic energy in a controlled manner at the time newlineof collision. Amongst them, metallic tubes have attracted much more newlineattention due to their high stiffness and strength combined with the low newlineweight and ease of manufacturing.The main objective of this research work is to present the newlinecrashworthiness performance of single and double section bi-tubular thinwalled newlinestructures. Single and bi-tubular structures with triangular, square and newlinehexagonal sections were made from stainless steel sheet and subjected to newlinequasi-static axial crushing. newline newline