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Numerical and Experimental Investigations on the Expansion Tube Energy Absorber
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Numerical and Experimental Investigations on the Expansion Tube Energy Absorber
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Journal Article
Numerical and Experimental Investigations on the Expansion Tube Energy Absorber
2012
Overview
Expansion tube energy absorber is of interest in bumper device on the spacecraft, for example the seat-bumper and its crushing characteristics have shown an excellent performance. This paper contributes to the analysis and investigation of the crushing characteristics of the expansion tube energy absorber, by simulating the response of the 2Al2T4 expansion tube subjected to quasi-static axial compressive loading, using the LS-DYNA finite element code. Corresponding tests were conducted to serve as comparison purpose. Satisfactory level of agreement between simulation and testing results was obtained regarding the main characteristics of the tested expansion tubes such as peak compressive load, energy absorption and the overall compressive response. Formula of the crushing force deduced using plastic mechanic theory was checked. Impact model was also constructed and dynamic simulations were performed to investigate the axial impact response of the expansion tube energy absorber. The simulation results of quasi-static and dynamic compression response of the expansion tube are very similar.
Publisher
Trans Tech Publications Ltd
ISBN
9783037854624, 3037854626
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