Axial splitting of circular metal tubes |
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Authors: | T.Y. Reddy S.R. Reid |
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Affiliation: | 1. Beijing Institute of Spacecraft System Engineering, Beijing 100094, PR China;2. Institute of Solid Mechanics, Beihang University, Beijing 100191, PR China;3. Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, VIC 3122, Australia;4. CAS Key Laboratory of Mechanical Behaviour and Design of Materials, University of Science and Technology of China, Heifei, Anhui 230027, PR China |
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Abstract: | A novel mode of deformation of circular tubes axially compressed on to a die is examined experimentally with regard to its energy absorbing capacity. The tube splits as a number of axial cracks are produced and the strips so formed are bent into curls. The major part of the deformation takes place at a nearly constant load which can be increased by preventing the formation of the curls. A simple upper bound approach is used to estimate this operating load. Compared with axial buckling and the inversion mode, the operating load for a splitting tube is somewhat lower. However, the fact that the stroke is of the order of 90% of the tube length means that the performance as measured by the total energy absorbed is often as good as these two efficient modes of deformation. |
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