Mechanical Properties Analysis of Patch Repaired Composite Structures with Debonding Flaw

6th Annual International Conference on Material Science and Environmental Engineering

材料科学;生态环境科学

Guo, Xia^1^2 ; Chi, Hai^1^2 ; He, Junzhi^1^2 ; Liu, Weili^1^2^3 ; Hu, Guanghui^1^2 ; Gao, Xia^1^2^3

Beijing Centre for Physical and Chemical Analysis, Beijing

100089, China^1

Beijing Key Laboratory of Organic Materials Testing Technology and Quality Evaluation, Beijing

100089, China^2

Beijing Academy of Science and Technology Key Laboratory of Analysis and Testing Technology, Beijing

10089, China^3

关键词: Compression failure;    Compression loads;    Compression process;    Debonding damage;    Mechanical properties analysis;    Repair process;    Transport industry;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/472/1/012004/pdf
DOI  :  10.1088/1757-899X/472/1/012004

来源: IOP

【 摘 要 】

Increasing use of composite structures in transport industry puts forward new requirements for its maintenance and repair. However, bonding repair process will produce inevitable debonding flaws, and there will also be debonding damage during use service. In this paper, mechanisms properties of compression failure of patch repaired composite structures were explored, and effects of flaws on the properties were analysed. The results showed that buckling of patch repaired structures first occurred in compression process and then failed. Patch repaired structures broke at the damage hole. Under compression load, debonding flaw of patch repaired composite structures would be expanded, which caused the patch and the parent laminates to be detached earlier, and compression bearing capacity became weaker.