Interlayer particle toughened carbon fibre composites play an integral role in the lightweight design of primary aerospace structures. We investigate an out-of-autoclave method using double vacuum debulking (DVD) to perform in-situ soft patch repairs. Utilizing the DVD process decreases the porosity of the co-cured film adhesive and patch from 4.7% to 0.4%, thereby increasing the flexural and interlaminar shear strength of 1D repair laminates by 30% to levels equal to autoclave cured laminates. In contrast, the higher void content did not significantly affect straight (2D) and round (3D) scarf repair strengths. 3D repairs showed significantly improved strength recovery compared to 2D repairs due to the stress shedding in the hoop direction. Finally, DVD process parameters may be optimized to reduce repair time by increasing the temperature and ramp rates while reducing the soak times, with no detrimental effects on porosity or strength observed.

层间颗粒增韧碳纤维复合材料在主要航空航天结构的轻量化设计中起着不可或缺的作用。我们研究了使用双真空减震（DVD）进行原位软补丁修复的高压灭菌方法。使用DVD工艺可将共固化膜粘合剂和贴剂的孔隙率从4.7％降低到0.4％，从而将一维修补层压板的弯曲和层间剪切强度提高30％，达到与高压釜固化层压板相同的水平。相比之下，较高的空隙率并未显着影响直线围巾（2D）和圆形围巾（3D）的修复强度。与2D修复相比，3D修复由于在环向应力释放而显示出显着改善的强度恢复。最后，