ENERGY ABSORBING CHARACTERISTICS OF TAPPERED CIRCULAR TUBE
Study of energy absorption performance of tapered circular tubes under axial compression could be helpful for their applications as anti-impaction and vibration devices. Tapered angle was the main factor which made tapered circular tubes behaved different from common circular tubes. Raising tapered angle would improve the energy absorption stability but weaken the energy absorption capability. Furthermore, the mean crushing force would be enhanced and the initial peak force would be cut down as tapered angle increasing. Three representative deformation modes, ‘diamond-stack’ mode,’ diamond-radial’ mode and’ ring-radial concertina’ mode , could be ensured for tapered circular tubes under axial compression. Building up the theoretical model for “ring-radial concertina” mode and analyzing it with plastic theory, then, the ways of predicting the energy absorption ability of tapered circular tubes could be obtained.
1. Engineering Institute of Corps Engineers & College of Science, PLA University of Science and Technology, Nanjing 210007;
2. Jangsu Jianda architectural limited liability company, Nanjing 210009；
Abstract：Study of energy absorption performance of tapered circular tubes under axial compression could be helpful for their applications as anti-impaction and vibration devices. Tapered angle was the main factor which made tapered circular tubes behaved different from common circular tubes. Raising tapered angle would improve the energy absorption stability but weaken the energy absorption capability. Furthermore, the mean crushing force would be enhanced and the initial peak force would be cut down as tapered angle increasing. Three representative deformation modes, ‘diamond-stack’ mode,’ diamond-radial’ mode and’ ring-radial concertina’ mode , could be ensured for tapered circular tubes under axial compression. Building up the theoretical model for “ring-radial concertina” mode and analyzing it with plastic theory, then, the ways of predicting the energy absorption ability of tapered circular tubes could be obtained.
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