Dynamic response and failure of sandwich beams with graded metal foam core under high-velocity impact

WEI Jianhui; LI Xu; HUANG Wei; XU Hongjian; FANG Bopeng

doi:10.11883/bzycj-2022-0156

Volume 43 Issue 5

May 2023

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WEI Jianhui, LI Xu, HUANG Wei, XU Hongjian, FANG Bopeng. Dynamic response and failure of sandwich beams with graded metal foam core under high-velocity impact[J]. Explosion And Shock Waves, 2023, 43(5): 053301. doi: 10.11883/bzycj-2022-0156

Citation:

WEI Jianhui, LI Xu, HUANG Wei, XU Hongjian, FANG Bopeng. Dynamic response and failure of sandwich beams with graded metal foam core under high-velocity impact[J]. Explosion And Shock Waves, 2023, 43(5): 053301. doi: 10.11883/bzycj-2022-0156

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Dynamic response and failure of sandwich beams with graded metal foam core under high-velocity impact

doi: 10.11883/bzycj-2022-0156

WEI Jianhui^1
,,
LI Xu¹,
HUANG Wei^{2
,
,},
XU Hongjian^{2, 3},
FANG Bopeng²

1.
Wuhan Second Ship Design and Research Institute, Wuhan 430061, Hubei, China
2.
School of Naval Architecture and Ocean Engineering, Huazhong University of Science and Technology, Wuhan 430074, Hubei, China
3.
Tianjin Navigation Instrument Research Institute, Tianjin 300131, China

Received Date: 2022-04-16
Rev Recd Date: 2022-06-06

Available Online: 2022-06-07

Publish Date: 2023-05-05

Abstract

Abstract

The dynamic response and failure of sandwich beams with gradient metal foam core subjected to high-velocity impact are studied experimentally. The impact resistance of five sandwich beams with different density gradient arrangements but the same surface density composed of three aluminum foams with different densities is analyzed. All the sandwich beams are simply-clamped. Combined with the quasi-static three-point bending tests, the impact resistance of the gradient sandwich beams is evaluated in terms of dynamic deformation and failure modes by considering the effects of core density gradient and impulsive intensity. The results show that the density gradient effect significantly influences the dynamic response and failure mode. The initial failure mode plays an important role in the structural response and the predominant energy absorption mechanism. Since the impact condition can not produce the local compression of the medium-density core, the initial failure mode of the uniform and negative gradient sandwich structures is the overall bending deformation, while the local core compression is the initial failure mode of the other structures with weak cores located in the first two layers. When the impulsive intensity is low, the gradient sandwich beam has superior impact resistance to the uniform counterpart. With increasing intensity, once a critical intensity is exceeded, the gradient sandwich beam shows low bending resistance to the uniform counterpart. Therefore, the optimal design of the core density gradient can efficiently improve the impact resistance of the sandwich beams under the high-velocity impact, which is a valuable reference for engineering applications.
- sandwich beam with gradient metal foam core,
- impact resistance,
- dynamic response,
- failure mode

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References(19)

References

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