Impact response of TPS folded sandwich structure

HE Yuanpeng; WANG Lingfeng; YANG Qiusong; LI Zhejian; HAO Hong; CHEN Wensu

doi:10.11883/bzycj-2023-0315

Volume 44 Issue 4

Apr. 2024

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HE Yuanpeng, WANG Lingfeng, YANG Qiusong, LI Zhejian, HAO Hong, CHEN Wensu. Impact response of TPS folded sandwich structure[J]. Explosion And Shock Waves, 2024, 44(4): 043103. doi: 10.11883/bzycj-2023-0315

Citation:

HE Yuanpeng, WANG Lingfeng, YANG Qiusong, LI Zhejian, HAO Hong, CHEN Wensu. Impact response of TPS folded sandwich structure[J]. Explosion And Shock Waves, 2024, 44(4): 043103. doi: 10.11883/bzycj-2023-0315

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Impact response of TPS folded sandwich structure

doi: 10.11883/bzycj-2023-0315

HE Yuanpeng^{1, 2
,},
WANG Lingfeng^{1, 2},
YANG Qiusong^{1, 2},
LI Zhejian^{1, 2
,
,},
HAO Hong^{1, 2, 3},
CHEN Wensu³

1.
Earthquake Engineering Research & Test Center, Guangzhou University, Guangzhou 510006, Guangdong, China
2.
Guangdong Provincial Key Laboratory of Earthquake Engineering and Applied Technology, Key Laboratory of Earthquake Resistance, Earthquake Mitigation and Structural Safety, Ministry of Education, Guangzhou 510006, Guangdong, China
3.
Center for Infrastructural Monitoring and Protection, School of Civil and Mechanical Engineering, Curtin University, Perth, Australia

Received Date: 2023-08-30
Rev Recd Date: 2023-10-18

Available Online: 2024-01-22

Publish Date: 2024-04-07

Abstract

Abstract

As a novel folded structure, the truncated square pyramid (TSP) structure exhibits excellent impact resistance and energy absorption performance. It also has the merit of simple and modulated fabrication of its unit cell. To further verify the performance of TSP sandwich panels under local impact load, impact tests are carried out in this work by using an air cannon testing system. The unit cells are firstly prepared by multi-stage mold-pressing and then modular arranged to form single and multi-layer sandwich panels. The impact protection performance and energy absorption properties of the back-supported cladding cases and unsupported sandwich structures are investigated under different impact scenarios. Their impact resistance performances are evaluated by measuring and comparing the displacement time histories of the single-layer sandwich structures and their deformation modes after impact. For the back-supported cladding cases, a measuring system with five load cells is placed behind the back plate of the cladding and is rigidly supported to record the time history and distribution of the transmitted force of the claddings under impact. Their impact mitigation performances are evaluated by analyzing the recorded force-time histories under various loading scenarios. It is found that the maximum displacement and residual displacement of the back plate increase with the increase of impact velocity for the unsupported cases. For the rigidly supported claddings, the double-layered cladding shows significantly improved energy absorption and impact mitigation performance than the single-layered one. It shows a better utilization of the core, which leads to a reduced initial peak transmitted force. In addition, it is found that the impact position has a significant effect on the dynamic response of the claddings as it changes the peak transmitted force and its occurrence time because of the change in deformation modes. The research results provide a reference for the engineering design and application of TSP sandwich structures.
- folded structure,
- cladding structure,
- impact test,
- dynamic response,
- impact resistance

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References(24)

References

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