| Citation: | LIU Peng, WEI Lili, MIAO Chunhe, et al. Influence of repair parameters on residual thermal stress of composite bonded metal[J]. Journal of Aerospace Power, 2026, 41（1）：20240815 doi: 10.13224/j.cnki.jasp.20240815
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In order to solve the residual thermal stress control problem caused by uncoordinated material stiffness and mismatching of thermal expansion coefficient in the process of repairing metal crack damage by bonding composite materials, CCF300/QY8911 composite material bonded single-sided cracked aluminum alloy plate was taken as the research object, and the curing dynamic behavior of J-349-1 adhesive was considered. By means of finite element simulation, the effects of patch thickness, ply and curing regime on residual thermal stress of composite bonded metal repaired plate with cracks were analyzed, and in-situ curing deformation monitoring was completed. The results showed that the residual thermal stress had negative effects on the tensile strength, elongation and fatigue resistance of the repaired plate. Under the principle of static deformation coordination repair, the thickness of the composite patch had a great influence on the residual thermal stress, but the ply design had no obvious influence on the residual thermal stress of the repaired plate. The curing system had a great influence on the residual thermal stress of the repaired plate, and the two-stage curing process can effectively reduce the residual thermal stress of the metal plate under the premise of ensuring the repair efficiency. The conclusion can provide a good basis for the optimization of the repair process.
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