Performance and residual strength of metal-faced composite corrugated sandwich structure under multiple impacts

XIA Xin; KONG Xiangshao; ZHENG Cheng; ZHU Zihan

doi:10.13801/j.cnki.fhclxb.20240419.002

Volume 41 Issue 9

Sep. 2024

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XIA Xin, KONG Xiangshao, ZHENG Cheng, et al. Performance and residual strength of metal-faced composite corrugated sandwich structure under multiple impacts[J]. Acta Materiae Compositae Sinica, 2024, 41(9): 4942-4958. doi: 10.13801/j.cnki.fhclxb.20240419.002

Citation:

XIA Xin, KONG Xiangshao, ZHENG Cheng, et al. Performance and residual strength of metal-faced composite corrugated sandwich structure under multiple impacts[J]. Acta Materiae Compositae Sinica, 2024, 41(9): 4942-4958. doi: 10.13801/j.cnki.fhclxb.20240419.002

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Performance and residual strength of metal-faced composite corrugated sandwich structure under multiple impacts

doi: 10.13801/j.cnki.fhclxb.20240419.002

XIA Xin^{1, 2},
KONG Xiangshao¹,
ZHENG Cheng^{1
,
,},
ZHU Zihan^{1, 2}

1.
Research Center of Green and Intelligent River-Sea Direct Ships and Cruise Yachts, Wuhan University of Technology, Wuhan 430063, China
2.
School of Marine Engineering, Energy and Power Engineering, Wuhan University of Technology, Wuhan 430063, China

Funds: National Natural Science Foundation of China (12202329); National Natural Science Foundation of China (52171318)

Received Date: 2024-03-04
Accepted Date: 2024-04-12
Rev Recd Date: 2024-04-11

Available Online: 2024-04-23

Publish Date: 2024-09-15

Abstract

Abstract

The metallic-faced composite corrugated sandwich structure, which combines the impact resistance of metals with the high specific strength and stiffness of composites, represents an exemplary form of innovative construction. During its service life, the sandwich structure is subjected to multiple impact conditions, yet the patterns of damage from repeated impacts and the post-damage residual strength are not yet clearly understood. To address this, a comprehensive study was conducted through a series of impact tests and CT non-destructive scanning analyses, delving into the dynamic response to low-velocity impacts, internal failure modes, load-displacement characteristics, and energy absorption features. Furthermore, based on these findings, plane compression tests were carried out on impacted specimens to analyze the residual compressive strength and failure modes after multiple impacts. The findings indicate that the initial impact inflicts the most damage, and with increasing impact frequency, the energy-absorbing capacity and impact resistance of the sandwich structure diminish. In multiple impacts, the predominant damage modes in the sandwich structure include matrix cracking, delamination, and fiber breakage in the core material, with higher energy impacts invariably causing more extensive damage. Moreover, as the number of impacts increases, the accumulation of damage approaches saturation, and the residual compressive strength trends towards a threshold value.
- metal-faced,
- composite materials,
- sandwich structure,
- multiple impacts,
- impact damage,
- residual strength
Long Abstrsct
Innovation Points

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References(27)

References

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