Abstract
Long cylindrical tubes exhibit poor energy absorption due to Euler’s buckling mode when they are used to absorb impact energy. Circumferential grooves are introduced in the tube to force the plastic deformation which helps to control the buckling mode. Quasi-static and impact tests are performed and the load-displacement curves are studied. The results are also compared with the ones for the geometrically identical tubes. Non-linear finite element analyses are also carried out to simulate quasi-static and impact test conditions. The numerical predicted crushing force and fold formation are found to be in good agreement with the experimental results. The results revealed that grooves can stabilize the deformation behaviour and thus the proposed method could be a good candidate as a controllable energy absorption element.
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