Impact resistance of thickness-graded arrow-shaped honeycomb pedestals with negative Poisson’s ratio

LI Pu; YUE Jingxia; LI Xiaobin; PENG Shuai

doi:10.11883/bzycj-2019-0414

Volume 40 Issue 7

Jul. 2020

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LI Pu, YUE Jingxia, LI Xiaobin, PENG Shuai. Impact resistance of thickness-graded arrow-shaped honeycomb pedestals with negative Poisson’s ratio[J]. Explosion And Shock Waves, 2020, 40(7): 071403. doi: 10.11883/bzycj-2019-0414

Citation:

LI Pu, YUE Jingxia, LI Xiaobin, PENG Shuai. Impact resistance of thickness-graded arrow-shaped honeycomb pedestals with negative Poisson’s ratio[J]. Explosion And Shock Waves, 2020, 40(7): 071403. doi: 10.11883/bzycj-2019-0414

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Impact resistance of thickness-graded arrow-shaped honeycomb pedestals with negative Poisson’s ratio

doi: 10.11883/bzycj-2019-0414

LI Pu^1
,,
YUE Jingxia¹,
LI Xiaobin^{1
,
,},
PENG Shuai²

1.
School of Transportation, Wuhan University of Technology, Wuhan 430000, Hubei, China
2.
Systems Engineering Research Institute, Beijing 100036, China

Received Date: 2019-10-28
Rev Recd Date: 2020-05-25

Available Online: 2020-06-25

Publish Date: 2020-07-01

Abstract

Abstract

An arrow-shaped honeycomb pedestal with negative Poisson’s ratio was designed. An analytical formula was derived for the mechanical properties of the cell structures, and the impact resistance of the thickness-graded arrow-shaped honeycomb materials with negative Poisson's ratio was numerically studied by the explicit dynamic finite element method. Based on the concept of functionally-graded materials, honeycomb layers with pathwise thickness gradient, inverse thickness gradient and uniform thickness were designed, by taking the thickness of the cell wall as the independent variable, the relevant model was established. The influence of thickness gradients on the impact resistance of the pedestal was discussed concretely under the premise of constant pedestal mass. The results show that, under the same gradient setting, the change of cell angle will cause the change of equivalent elastic modulus of the honeycomb structure, thus changing the impact resistance of the pedestal. When the honeycomb layer with a thinner cell wall is placed at the impact end, the stress level of the pedestal is significantly reduced. By placing a honeycomb layer with a thicker cell wall on the impact end, the output impact environment of the pedestal panel can be effectively controlled.
- honeycomb structure pedestal,
- negative Poisson’s ratio,
- arrow-shaped cell,
- thickness gradient,
- impact resistance

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References(18)

References

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