Failure modes and shock resistance of sandwich panels with layered-gradient aluminum foam cores under air-blast loading

SU Xingya; JING Lin; ZHAO Longmao

doi:10.11883/bzycj-2018-0198

Volume 39 Issue 6

Jun. 2019

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SU Xingya, JING Lin, ZHAO Longmao. Failure modes and shock resistance of sandwich panels with layered-gradient aluminum foam cores under air-blast loading[J]. Explosion And Shock Waves, 2019, 39(6): 063103. doi: 10.11883/bzycj-2018-0198

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SU Xingya, JING Lin, ZHAO Longmao. Failure modes and shock resistance of sandwich panels with layered-gradient aluminum foam cores under air-blast loading[J]. Explosion And Shock Waves, 2019, 39(6): 063103. doi: 10.11883/bzycj-2018-0198

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Failure modes and shock resistance of sandwich panels with layered-gradient aluminum foam cores under air-blast loading

doi: 10.11883/bzycj-2018-0198

SU Xingya^1
,,
JING Lin^{1
,
,},
ZHAO Longmao²

1.
State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, Sichuan, China
2.
Institute of Applied Mechanics, Taiyuan University of Technology, Taiyuan 030024, Shanxi, China

Received Date: 2018-06-05
Rev Recd Date: 2019-02-22

Available Online: 2019-05-25

Publish Date: 2019-06-01

Abstract

Abstract

In this work we investigated the deformation/failure modes and shock resistance performance of sandwich panels with layered-gradient aluminum foam cores under air-blast loading by experiment using a ballistic pendulum device, the deflection-time history curves in the central point of the back face-sheet were measured using a laser displacement sensor, and examined the influences of the charge mass and core-layer arrangement on the failure modes and the shock resistance of the specimens. The results showed that the sandwich panel specimens failed due to the large inelastic deformation of the face-sheets, the core compression, the tensile fracture and the shear failure of the core. The shock resistance performance of the ungraded sandwich panels was found to be superior to all the graded core sandwich configurations. For the sandwich panels with layered-gradient cores, the improvement of the core-layer arrangement on the shock resistance of the specimens was not obvious under small blast impulse, while that of the graded specimens containing the top core-layer with the largest relative density demonstrated a remarkably greater shock resistance. These findings can serve as guidance in the optimal design of metallic foam core sandwich structures.
- sandwich panel,
- blast loading,
- core configurations,
- deformation/failure modes,
- shock resistance

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References(19)

References

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