Typical failure modes and corresponding repairing methods of woven lattice sandwich composites

• Published in: Polymer composites 2024-10, Vol.45 (14), p.13418-13433
• Main Authors: Li, Xiaofei, Shi, Hougai, Bai, Cuiping, Yan, Qu, Wang, Ben, Fan, Hualin
• Format: Article
• Language: English
• Subjects: Bearing capacity; Carrying capacity; Composite materials; Damage detection; failure; Failure modes; Lattice vibration; Mechanical properties; mechanical testing; sandwich structures; structural repair
• ISSN: 0272-8397; 1548-0569
• DOI: 10.1002/pc.28862

The woven lattice sandwich composites (WLSCs) are susceptible to damage during service, which leads to a decline in their mechanical properties. Therefore, it is crucial to develop repair methods that specifically target the mechanical properties of WLSCs. In this study, repair techniques for the common types of skin and core damage in WLSCs were propose. The repair process begins with identifying the type of structural damage and removing the damaged section. Subsequently, the skin and core layers are repaired accordingly. The mechanical properties before and after repair are then compared through experimental evaluations. The results demonstrate that the carrying capacity of the repaired WLSCs is 85% higher than that of the original, unrepaired structure using the selected repair method. Highlights Typical damage modes of woven lattice sandwich composites were classified. Repairing methods are proposed for woven lattice panels based on damage modes. Core‐foaming and skin patch adhering perfectly rehabilitate the damaged sandwich. Bearing capacity of the repaired sandwich slightly surpasses its original structure. Typical damage modes and corresponding repairing method.