Evaluation of Energy Absorption Capacity for Circular Tubes with Corrugated Surface under Axial Compressive Load

概要

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In this paper, the energy absorption capacity for circular tubes with corrugated surface is studied based on the numerical analysis, FEM. The axial compressive behaviour for circular tubes with corrugated surface behaves more stable and efficient as compared with that for standard tubes. A simple and predictable method of energy absorption capacity for circular tubes with corrugated surface is needed for designing the tubes as impact energy absorption devices for vehicles. In this study, effects of strain hardening and tube geometries on the radius of curvature for each wrinkle observed in a tube are discussed. Also, based on the numerical results, a simple and approximate method for estimating the average compressive load in axial direction and the axial crushing distance is developed, and the validity of the approximation is checked by comparing the prediction with numerical and experimental results.
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