Axial energy absorption characteristics of unidirectional carbon-fiber composite cone tubes

SONG Kai WANG Zhen ZHU Guohua CHENG Aiguo

Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (7) : 172-178.

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PDF(3203 KB)
Journal of Vibration and Shock ›› 2018, Vol. 37 ›› Issue (7) : 172-178.

Axial energy absorption characteristics of unidirectional carbon-fiber composite cone tubes

  • SONG Kai  WANG Zhen  ZHU Guohua  CHENG Aiguo
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Abstract

In order to improve energy absorption abilities of carbon-fiber composite cone tubes to make composite energy-absorbing components achieve the best effect of energy-absorbing in engineering applications, the structural optimization of composite cone tubes was investigated. The influences of ratio (α/N) of conical degree (α) to number of ply(N) on the specific energy absorption (SEA) and the initial peak impact load (Pinitial) were studied. It was shown that with increase in α/N, SEA and Pinitial are both reduced; when α/N exceeds 0.54, the delamination no longer occurs in crushing process. Finally, a composite cone tube was manufactured according to the optimization results,the optimal results were validated with tests. Test results showed that after optimization, the tube’s SAE increases 15.6% (from 67.9 J/g to 78.50 J/g), its Pinitial decreases 51.8% (from 52.3KN to 25.2KN), its mass decreases 22.4% (from 55.3g to 42.9g).
 


Key words

composite / cone tube / energy absorption / optimization

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SONG Kai WANG Zhen ZHU Guohua CHENG Aiguo. Axial energy absorption characteristics of unidirectional carbon-fiber composite cone tubes[J]. Journal of Vibration and Shock, 2018, 37(7): 172-178

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