The fatigue performance of repaired Al-alloy plates bonded by 2D&3D woven composite patch under UV and thermal curing was evaluated. The fatigue life N, crack growth rate da/dN, stress intensity factor range ΔΚ, the ‘m’ from Pairs equation and the fracture morphology were characterized to investigate the influence of patch styles and curing methods on the repairing effect. The results showed that fatigue performance was enhanced relative to unrepaired system. The stress was transferred from the crack tip to composite patch by adhesive for reducing the ΔK, and then da/dN was further restrained, contributing to the improvement of fatigue lifetime. The 3D patch had better repair effect than that of 2D patch, and UV curing was superior to thermal curing. It was more sensitive to the curing methods. The sample repaired by 3D patch under UV radiation (U-3D/25) presented the optimal performance, and fatigue lifetime reached 48651 cycles, increased by 806.14% relative to unrepaired system, which was proved by the decrease of ‘m’. The repair samples showed different fracture morphologies, which was attributed to changes of crack propagation path and stress distribution of different repair system. The fracture surface of U-3D/25 revealed ductile fracture features, presenting the optimal repair effect.

评估了2D＆3D编织复合材料贴片在紫外线和热固化下修复的铝合金板的疲劳性能。表征了疲劳寿命N，裂纹扩展速率da / dN，应力强度因子范围ΔΚ，Pairs方程的'm'和断裂形态，以研究修补方式和固化方法对修复效果的影响。结果表明，相对于未修复的系统，疲劳性能得到了提高。为了减小ΔK，通过粘合剂将应力从裂纹尖端转移到复合补片上，然后进一步抑制了da / dN，有助于延长疲劳寿命。3D贴片的修复效果优于2D贴片，并且UV固化优于热固化。它对固化方法更敏感。在紫外线辐射下（U-3D / 25）用3D贴片修复的样品表现出最佳性能，疲劳寿命达到48651个循环，相对于未修复的系统，增加了806.14％，这可以通过'm'的减小来证明。修复样品显示出不同的断裂形态，这归因于裂纹扩展路径的改变和不同修复系统的应力分布。U-3D / 25的断裂表面表现出韧性断裂特征，表现出最佳的修复效果。