基于前端聚合的复合材料穿孔损伤原位快速修复研究OA

Existing composite repair technologies face limitations in complex process and timeliness,which re-quire heating/pressurization equipment for curing and prove unsuitable for in-situ,low-energy,rapid field repairs.Frontal polymerization(FP)polymers,typified by dicyclopentadiene(DCPD),present compelling potential for emer-gency equipment maintenance.These resins achieve rapid curing under minimal thermal initiation,featuring simple processing,ultra-fast kinetics,low energy consumption,and exceptional mechanical properties.Consequently,this work investigates FP-based rapid repair of perforated composite laminates,systematically evaluating the impact of patch ply count,adhesive interlayer,and patch geometry on restoration efficacy.Results demonstrate optimal repair performance with 4 patch plies.However,the lack of adequate bonding between the FP patch and damaged parent plate initially limits the strength recovery ratio to 40.74%.The application of a rapidly curing epoxy adhesive(DP100 glue)at the repair interface increased the strength recovery ratio to 71.94%.Further geometric optimization of a trap-ezoidal patch configuration increased this ratio to 84.48%.Compared to conventional external patch repair,the FP-based technique delivers substantial advances:energy consumption decreases by 1～4 orders of magnitude,repair time shortens from hours to minutes,and the process eliminates auxiliary heating/pressurization equipment.