摘要
金属-有机材料层合结构不仅兼顾了金属优越的力学性能,同时具有有机材料的功能性、复杂外形和轻质。然而,两种材料的胶接质量直接决定了结构的安全和可靠性能,因此急需一种可靠的无损检测手段对胶接产生的脱粘损伤进行评估。提出了一种基于频带选择的脱粘损伤成像方法,采用激光超声的测量方式,实现了金属-有机材料层合结构的脱粘损伤成像。首先通过试验研究,发现了金属-有机材料层合结构中,不同频率的导波信号对脱粘损伤的灵敏度差异;其次,提出一种基于波场数据分析的频带选取方法,利用选取频率下导波信号在脱粘及健康区域的能量分布变化,对不同金属-有机材料层合结构中的不同脱粘损伤进行了成像。结果表明,所提出的检测方法在损伤成像分辨率上得到了显著提升。
Metal-organic material laminated structure not only has the excellent mechanical properties,but also shows the functional integration,complex shapes and lightweight.Since the bonding quality determines the safety and reliability of the structure,an effective non-destructive testing method is urgently required to evaluate the debonding damage in the laminated structure.A debonding damage imaging method based on frequency band selection is presented.By using the laser ultrasonic technique,the proposed method can identify the debonding damage in metal-organic material laminate structures.Firstly,through the experimental study,it can be found that the guided wave signals with different frequencies have different sensitivity to the debonding damage in metal-organic material laminated structure.Then,an adaptive guided wave frequency selection algorithm is developed.By extracting the difference between the guided wave energy distribution in the debonding and healthy areas,the different debonding damages in the laminated structure with different metal-organic materials can be identified.The results show that the proposed detection method has significantly improved the resolution of damage imaging.
作者
张超
王宏远
季宏丽
朱丽晨
裘进浩
ZHANG Chao;WANG Hongyuan;JI Hongli;ZHU Lichen;QIU Jinhao(State Key Laboratory of Mechanics and Control for Aerospace Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016)
出处
《机械工程学报》
北大核心
2025年第2期24-35,共12页
Journal of Mechanical Engineering
基金
江苏省自然科学基金(BK20220133)
国家自然科学基金(52175141,52235003,51921003)
中国航空科学基金(2023Z061052001)资助项目。
关键词
脱粘损伤
无损检测
激光超声
层合结构
debonding damage
non-destructive testing
laser ultrasonic
laminated structure
