Dynamic responses of metal foam sandwich beams to repeated impacts

ZHU Ling; GUO Kailing; YU Tongxi; LI Yinggang

doi:10.11883/bzycj-2020-0198

Volume 41 Issue 7

Jul. 2021

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WANG Bin, TAN Duo-wang, ZHAO Ji-bo, WEN Shang-gang. DiametereffectofJBO-9021ratesticksatroomtemperature[J]. Explosion And Shock Waves, 2012, 32(5): 490-494. doi: 10.11883/1001-1455(2012)05-0490-05

Citation:

ZHU Ling, GUO Kailing, YU Tongxi, LI Yinggang. Dynamic responses of metal foam sandwich beams to repeated impacts[J]. Explosion And Shock Waves, 2021, 41(7): 073101. doi: 10.11883/bzycj-2020-0198

WANG Bin, TAN Duo-wang, ZHAO Ji-bo, WEN Shang-gang. DiametereffectofJBO-9021ratesticksatroomtemperature[J]. Explosion And Shock Waves, 2012, 32(5): 490-494. doi: 10.11883/1001-1455(2012)05-0490-05

Citation:

ZHU Ling, GUO Kailing, YU Tongxi, LI Yinggang. Dynamic responses of metal foam sandwich beams to repeated impacts[J]. Explosion And Shock Waves, 2021, 41(7): 073101. doi: 10.11883/bzycj-2020-0198

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Dynamic responses of metal foam sandwich beams to repeated impacts

doi: 10.11883/bzycj-2020-0198

ZHU Ling^{1, 2
,},
GUO Kailing^{1, 2
,
,},
YU Tongxi³,
LI Yinggang¹

1.
Key Laboratory of High Performance Ship Technology (Wuhan University of Technology), Ministry of Education, Wuhan 430063, Hubei, China
2.
Departments of Naval Architecture, Ocean and Structural Engineering, School of Transportation, Wuhan University of Technology, Wuhan 430063, Hubei, China
3.
Department of Mechanical and Aerospace Engineering, The Hong Kong University of Science and Technology, Clear Water Bay 999077, Kowloon, Hong Kong, China

Received Date: 2020-06-16
Rev Recd Date: 2021-03-17

Available Online: 2021-07-06

Publish Date: 2021-07-05

Abstract

Abstract

The phenomena of repeated impacts are very common, especial in the field of ship and ocean engineering. When the ship structures suffering from repeated impact loadings, the deformation and damages will accumulate, leading to failure even damage of the structures, which may cause serious accident. In order to study the dynamic behaviors of metal foam sandwich beams (MFSBs) under repeated impact loadings, the nonlinear finite element model was established based on the material model of crushable foam by using Abaqus-Explicit, and the approach to achieve repeated impacts in the software was proposed. The accuracy of the numerical simulation was verified by comparing the permanent deflections of front and back face sheets. Based on the results of the numerical simulations, the deformation modes, loading and unloading process as well as the energy absorption behavior of the MFSBs under repeated impacts were analyzed. Results show that during repeated impacts, the deformation of the MFSBs is accumulated gradually, the front face sheet mainly experiences global bending and local indentation, and the metal foam core suffers from local compression, while the back face sheet is subjected to global bending. During the repeated impacts, the loading and unloading stiffness increases with the impact number. The energy absorption of front face is larger than that of back face and metal foam core in all the impacts. As the impact number increases, the energy absorbed by front face sheet and foam core declines gradually, while that of the back face sheet increases, approaching a constant value. The plastic deformation energy of the MFSBs decreases with the impact number, on the opposite, the rebound energy of the MFSBs increases gradually with the impact number, while both of them trends to be stable. The proposed finite element method can be applied to accurately predict the dynamic responses of the MFSBs suffering from repeated impact loadings, and provide technical supports for the anti-impact design of metal foam sandwich structures.
- metal foam sandwich beam,
- repeated impacts,
- dynamic behavior,
- deformation accumulation,
- energy absorption

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References(18)

References

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