Highly efficient induction heating process to cure and health monitor the bonding of composite patches on aircraft structures (InHeatPro)

复合材料粘接补片由于其比机械紧固补片具有上级的机械完整性而被用于修复机体的腐蚀、疲劳和冲击损伤。此类维修还可减少飞机停机时间、维护劳动力成本并延长使用寿命。粘接修复的成功关键取决于在困难的现场条件下实现合适的表面处理和固化。将修补范围扩大到主要承载结构，需要增加保证水平，其中空隙/剥离低于临界尺寸阈值，并且固化条件导致足够的粘合剂剪切模量而没有高残余应力。我们建议开发一个“智能贴片”系统，该系统具有可靠的、低成本的、集成的传感器网络，该传感器网络将作为反馈控制系统的一部分，用于主动固化控制，以优化粘合剂的机械性能并最小化残余应力。传感器还将被用作有源换能器元件，以实现对贴片的非破坏性检查，从而以高概率检测等于或大于临界尺寸的空隙和剥离。

Bonded composite patches are used to repair corrosion, fatigue and impact damage to airframes due to their superior mechanical integrity characteristics compared with mechanically fastened repairs. Such repairs also reduce aircraft down-time, maintenance labour costs and enable useful life extension. Success of a bonded repair is critically dependent on achieving suitable surface preparation and cure under difficult field conditions. Expanding the scope of patch repairs to primary load bearing structures, requires an added level of assurance where voids/disbonds are below a critical size threshold and that cure conditions result in adequate adhesive shear modulus without high residual stress. We propose to develop a 'smart-patch' system with a reliable, low cost, integrated sensor network that will act as part of a feedback control system for active cure control to optimise both adhesive mechanical properties and minimise residual stress. The sensors will also be used as active transducer elements to enable non-destructive inspection of the patch to with a high probability of detection for voids and disbonds that are equal to or larger than the critical size.