Study on crashworthiness design criteria and method of tubular structures with power exponent distribution of thickness

XU Fengxiang; ZHANG Suo; WU Kunying

doi:10.11883/bzycj-2018-0013

Volume 39 Issue 3

Mar. 2019

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XU Fengxiang, ZHANG Suo, WU Kunying. Study on crashworthiness design criteria and method of tubular structures with power exponent distribution of thickness[J]. Explosion And Shock Waves, 2019, 39(3): 035103. doi: 10.11883/bzycj-2018-0013

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XU Fengxiang, ZHANG Suo, WU Kunying. Study on crashworthiness design criteria and method of tubular structures with power exponent distribution of thickness[J]. Explosion And Shock Waves, 2019, 39(3): 035103. doi: 10.11883/bzycj-2018-0013

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Study on crashworthiness design criteria and method of tubular structures with power exponent distribution of thickness

doi: 10.11883/bzycj-2018-0013

XU Fengxiang^{1, 2
,},
ZHANG Suo^{1, 2},
WU Kunying^{1, 2}

1.
Hubei Key Laboratory of Advanced Technology of Automotive Components, Wuhan University of Technology, Wuhan 430070, Hubei, China
2.
Hubei Collaborative Innovation Center for Automotive Components Technology, Wuhan University of Technology, Wuhan 430070, Hubei, China

Received Date: 2018-01-08
Rev Recd Date: 2018-01-24

Available Online: 2019-03-25

Publish Date: 2019-03-01

Abstract

Abstract

The property of continuous thickness or weight distributions plays an important even decisive role on the lightweight and performance design of an automotive body. The main study of safe design for continuous thickness components is to investigate on their crashworthiness in the crash process of automotive structures. We studied on a new energy-absorbed thin-walled structure with the thickness distributed according to the power exponent function. The analytical relationships of the relative parameters among the new structure, uniform thickness tubes, tailor welded tubes and taped tubes were obtained. And the crashworthiness design criteria was also carried out. The parametrical study shows that the crashworthiness of the new tube is superior to those of other cross-sectional tubes. Then, the crashworthiness design method of the new tube was performed. The graded exponent was given at two design regions and was sampled to construct reasonable approximate model. The compared results demonstrates that the optimal results of the higher model are not necessarily to be best. In addition, the crashworthiness of thethin-walled structures could be enhanced by reasonably designing the tube thickness.
- graded property,
- power exponent distribution,
- energy-absorbed structures,
- crashworthiness,
- design method

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References(18)

References

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