Impact Resistance of Repaired Composite Honeycomb Sandwich Panels With Internal Patch Reinforcement

PANG Jiankang; WU Zhibo; WANG Zhe; WANG Zengxian; ZHAO Jiatao; QIAN Yuan; DENG Jian

doi:10.21656/1000-0887.460080

Volume 47 Issue 6

Jun. 2026

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Article Navigation > Applied Mathematics and Mechanics > 2026 > 47(6): 814-824

PANG Jiankang, WU Zhibo, WANG Zhe, WANG Zengxian, ZHAO Jiatao, QIAN Yuan, DENG Jian. Impact Resistance of Repaired Composite Honeycomb Sandwich Panels With Internal Patch Reinforcement[J]. Applied Mathematics and Mechanics, 2026, 47(6): 814-824. doi: 10.21656/1000-0887.460080

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Impact Resistance of Repaired Composite Honeycomb Sandwich Panels With Internal Patch Reinforcement

doi: 10.21656/1000-0887.460080

PANG Jiankang^1,2,
WU Zhibo^1,2,
WANG Zhe³,
WANG Zengxian^1,2,
ZHAO Jiatao^1,2,
QIAN Yuan⁴,
DENG Jian^{1,2
,
,}

1.College of Aerospace Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P.R. China;
2. State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, P.R. China;
3. National Key Laboratory of Strength and Structural Integrity, Aircraft Strength Research Institute of China, Xi’an 710065, P.R. China；4. Purple Mountain Observatory, Chinese Academy of Sciences,Nanjing 210034, P.R. China

Received Date: 2025-04-22
Rev Recd Date: 2025-05-14

Available Online: 2026-07-03

Publish Date: 2026-06-01

Abstract

Abstract

Current repair methods for composite honeycomb sandwich panels primarily employ scarf repair techniques, but they are limited by complex procedures and high equipment requirements. Given equipment shortages and time constraints in emergency situations, there is an urgent need to develop rapid temporary repair techniques for sandwich panels. An internal patch reinforcement repair scheme combining operational simplicity with design flexibility was proposed. By drop-weight impact tests and the establishment of a finite element model for low-velocity impact analysis on repaired composite honeycomb sandwich structures, the effects of different reinforcement schemes on impact responses and damage mechanisms were comparatively analyzed through combination of mechanical response curves with failure morphology characteristics. The results indicate that, interfacial voids in conventional patch repairs reduce the impact load-bearing capacity. Due to the increase of contact area during impact, the proposed internal patch reinforcement enhances the impact resistance with a delay of the adhesive failure a constraint on structural deformation. The research provides a theoretical base for rapid repair technologies in composite structures.
- composite sandwich panel,
- low-velocity impact,
- patch repair,
- failure mechanism

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References(24)

References

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