Dynamic response and mechanism of mitigation and energy absorption of sandwich beams with a mechanical metamaterial core of negative Poisson’s ratio subjected to high-velocity impact of granular slug

HU Chaolei; SUN Hailiang; WANG Zhipeng; BAO Zhaopeng; CUI Tianning; QIN Qinghua

doi:10.11883/bzycj-2022-0045

Volume 42 Issue 12

Dec. 2022

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HU Chaolei, SUN Hailiang, WANG Zhipeng, BAO Zhaopeng, CUI Tianning, QIN Qinghua. Dynamic response and mechanism of mitigation and energy absorption of sandwich beams with a mechanical metamaterial core of negative Poisson’s ratio subjected to high-velocity impact of granular slug[J]. Explosion And Shock Waves, 2022, 42(12): 123101. doi: 10.11883/bzycj-2022-0045

Citation:

HU Chaolei, SUN Hailiang, WANG Zhipeng, BAO Zhaopeng, CUI Tianning, QIN Qinghua. Dynamic response and mechanism of mitigation and energy absorption of sandwich beams with a mechanical metamaterial core of negative Poisson’s ratio subjected to high-velocity impact of granular slug[J]. Explosion And Shock Waves, 2022, 42(12): 123101. doi: 10.11883/bzycj-2022-0045

Citation:

HU Chaolei, SUN Hailiang, WANG Zhipeng, BAO Zhaopeng, CUI Tianning, QIN Qinghua. Dynamic response and mechanism of mitigation and energy absorption of sandwich beams with a mechanical metamaterial core of negative Poisson’s ratio subjected to high-velocity impact of granular slug[J]. Explosion And Shock Waves, 2022, 42(12): 123101. doi: 10.11883/bzycj-2022-0045

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Dynamic response and mechanism of mitigation and energy absorption of sandwich beams with a mechanical metamaterial core of negative Poisson’s ratio subjected to high-velocity impact of granular slug

doi: 10.11883/bzycj-2022-0045

HU Chaolei^{1, 2
,},
SUN Hailiang³,
WANG Zhipeng^{1, 2},
BAO Zhaopeng^{1, 2},
CUI Tianning^{1, 2},
QIN Qinghua^{1, 2
,
,}

1.
State Key Laboratory for Strength and Vibration of Mechanical Structures, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China
2.
Joint Research Center for Extreme Environment and Protection Technology, School of Aerospace, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China
3.
Beijing Institute of Astronautical Systems Engineering, Beijing 100076, China

Received Date: 2022-02-09
Rev Recd Date: 2022-06-30

Available Online: 2022-07-11

Publish Date: 2022-12-08

Abstract

Abstract

In this paper, a finite element model of the granular slug launcher was constructed. Using the discrete element-finite element coupling method, the dynamic response and mechanism of mitigation and energy absorption of sandwich beams with reentrant honeycomb core of negative Poisson’s ratio subject to high velocity granular slugs were investigated. Effects of the load impulse, impact angle, core strengths and friction between the granular slug and face sheets on dynamic response of sandwich beams were analyzed. The results demonstrated that the active deformation mode of sandwich beam subject to the normal impact of the granular slug is combined local denting and overall bending. The deformation mode of the sandwich in-plane core is local denting mode due to the bending of cell walls, whilst the sandwich out-plane core is local folding mode due to buckling of the cell walls. Compared to the same areal density of the sandwich beam with the in-plane design of the soft core, the deflections of the sandwich beam with the out-of-plane design of the hard core are smaller but both its initial peak and level of impact force are higher and its response time is shorter. The mid-span maximum deflections of front and rear face sheets of the sandwich beam increase with the impact loading approximately log-linearly. Compared to the normal impact, the deformation mode of the sandwich beam subject to the oblique impact is asymmetrical and the local denting area reduced. The mid-span maximum deflections of the front and rear face sheets, the initial peak of impact force and the proportions of kinetic energy and momentum transferred to the sandwich beams subject to velocity granular slug with different impact angles decrease with the increase of the impact angles, while the friction between the granular slug and the face sheets has little effect on dynamic response of sandwich beams.

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References(23)

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