Detection of skin desoldering defect in Ti-alloy honeycomb structure using lock-in infrared thermography test
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摘要: 蒙皮脱焊是钛合金蜂窝结构制造和服役过程中最常见的缺陷类型。受钛合金材料热导率低的影响,钛合金蜂窝结构中蒙皮越厚,红外热成像检测时其表面反映脱焊缺陷信息的温度差异信号就越弱,检测难度就越大。针对这一问题,研究了不同蒙皮厚度钛合金蜂窝结构锁相红外热成像检测时调制频率的选取范围。建立了钛合金蜂窝结构锁相红外热成像检测有限元模型,分析了蒙皮表面温度在调制热流作用下的变化历程,基于相关算法提取了蒙皮表面对应缺陷区和非缺陷区的相位差,分析了相位差与调制频率、蒙皮厚度的关系。利用锁相红外热成像检测系统对预制脱焊缺陷的蜂窝试件进行了实验研究,获得了缺陷区与非缺陷区信号相位差与调制频率的关系。研究结果表明,针对蒙皮厚度为0.6~2.0 mm的钛合金蜂窝结构,采用0.04~0.10 Hz的调制频率能够获得最佳检测结果。研究结果为钛合金蜂窝结构实际检测提供了工艺指导。Abstract: Skin desoldering is the most common defect of Ti-alloy honeycomb sandwich during manufacturing and serving period. Due to low thermal conductivity of Ti-alloy material, as the skin of Ti-alloy honeycomb sandwich becomes thicker, temperature signal difference of defect and non-defect becomes weaker, and thus it is more difficult to test the defect by infrared thermography. Given the problem, the range of modulation frequency in this structure with different skin thickness by lock-in infrared thermography was studied. The finite element simulation model was built to analyze the variation of surface temperature under the heat flow. The extracted phase differences of defect and non-defect area based on correlation algorithm are available to analyze the effect of modulation frequency and skin thickness on these phase differences. Experiments were performed on the specimen with prefabricated defects of this structure using lock-in infrared detection system. The relationship between the phase difference and the modulation frequency was given after extracting the phase of defect and non-defect area. The research results show that the 0.04-0.10 Hz modulation frequencies applied to detect this structure of skin thickness within 0.6-2.0 mm can get optimal results. Research results provide a technical guidance for the practical detection of Ti-alloy honeycomb sandwich structure.
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[1] 苏小丽.钛合金蜂窝芯制造技术研究[D].南京:南京航空航天大学,2014.SU X L.Research on the manufacturing technology of titanium alloy honeycomb cores[D].Nanjing:Nanjing University of Aeronautics and Astronautics,2014(in Chinese). [2] BOUDJEMAI A,BOUANANE M H,MANKOUR R A,et al.MDA of hexagonal honeycomb plates used for space applications[J].World Academy of Science,Engineering and Technology,2012,6(6):1061-1069. [3] 杨海波,江少华,赵志远,等.钛合金蜂窝整体机身壁板技术应用研究[J].航空制造技术,2013(16):126-128.YANG H B,JIANG S H,ZHAO Z Y,et al.Engineering application research of titanium honeycomb integral fuselage panel technology[J].Aeronautical Manufacturing Technology,2013(16):126-128(in Chinese). [4] 谢凯文,杜丽婷,张斌,等.钎焊蜂窝夹层结构的超声检测技术研究[J].无损探伤,2014,38(4):24-25.XIE K W,DU L T,ZHANG B,et al.Research on the inspection of defects in Ti-alloy honeycomb sandwich using ultrasonic testing[J].NDT,2014,38(4):24-25(in Chinese). [5] 石剑,吕健.金属蜂窝真空钎焊件的超声波检测[J].无损检测,2007,29(7):392-395.SHI J,LV J.Ultrasonic testing of vacuum braze welding metal honeycomb part[J].Nondestructive Testing,2007,29(7):392-395(in Chinese). [6] 王丙阳,周炳如,晏峰峰.实时成像技术在钎焊蜂窝结构检测上的应用[J].无损检测,2013,35(4):53-56.WANG B Y,ZHOU B R,YAN F F.The real-time imaging detection technology of brazing metal honeycomb[J].Nondestructive Testing,2013,35(4):53-56(in Chinese). [7] 李晓丽,金万平,张存林,等.红外热波无损检测技术应用与进展[J].无损检测,2015,37(6):19-23.LI X L,JIN W P,ZHANG C L,et al.The application and progress of infrared thermal wave nondestructive detection technology[J].Nondestructive Testing,2015,37(6):19-23(in Chinese). [8] 何银行.基于红外锁相法的飞机蒙皮损伤检测试验研究[D].哈尔滨:哈尔滨工业大学,2009.HE Y H.Experimental research on damage in the airplane skin by means of lock-in thermography[D].Harbin:Harbin Institute of Technology,2009(in Chinese). [9] ZHAO S,ZHANG C,WU N.Pulsed thermography detection of water and hydraulic oil intrusion in the honeycomb sandwich structure composite[C]//Proceedings of SPIE,2011.Bellingham,WA:SPIE Press,2011:819337. [10] 刘俊岩,戴景民,王扬.红外锁相法热波检测技术及缺陷深度测量[J].光学精密工程,2010,18(1):37-44.LIU J Y,DAI J M,WANG Y.Thermal wave detection and defect depth measurement based on lock-in thermography[J].Optics and Precision Engineering,2010,18(1):37-44(in Chinese). [11] SFARRA S,IBARRA C C,AVDELIDIS N P,et al.A comparative investigation for the nondestructive testing of honeycomb structures by holographic interferometry and infrared thermography[C]//Journal of Physics:Conference Series.Bristol:IOP Publishing,2010,214:012071. [12] 刘颖韬,郭广平,杨党纲,等.脉冲热像法在航空复合材料构件无损检测中的应用[J].航空材料学报,2012,32(1):72-77.LIU Y T,GUO G P,YANG D G,et al.Pulsed thermography of composite components used in aerospace applications [J].Journal of Aeronautical Materials,2012,32(1):72-77(in Chinese). [13] BUSSE G,WU D,KARPEN W.Thermal wave imaging with phase sensitive modulated thermography[J].Journal of Applied Physics,1992,71(8):3962-3965. [14] LIU J,YANG W,DAI J.Research on thermal wave processing of lock-in thermography based on analyzing image sequences for NDT[J].Infrared Physics & Technology,2010,53(5):348-357. [15] 赵林博,吴伏家,徐珊珊.红外热成像检测在钛合金SPF/DB结构中的应用初探[J].航天制造技术,2012(2):66-68.ZHAO L B,WU F J,XU S S.A study on application of infrared detection testing for SPF/DB of titanium alloy[J].Aerospace Manufacturing Technology,2012(2):66-68(in Chinese).
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