On the Dead Zone of Eddy Current Heating of Lock-in Thermography for Unidirectional Carbon Fiber Reinforced Plastic
-
摘要: 以单向碳纤维复合材料为研究对象，使用锁相涡流热成像技术对试件加热并记录了红外热像图，获得具有较高信噪比的幅值和相位图；对涡流加热过程建立了有限元模型并进行了仿真分析。试验结果表明：单向碳纤维复合材料会产生加热盲区，涡流加热存在非均匀性；仿真结果与试验结果有较高的一致性，涡流向量中与碳纤维垂直的分量直接导致了涡流加热的非均匀性。检测盲区的发现，有助于指导碳纤维增强复合材料的涡流热成像无损检测。Abstract: The unidirectional carbon fiber composite materials (UD CFRP) was taken as the research object and the lock-in eddy current thermography was utilized to heat the specimen, the high SNR of amplitude and phase diagram were calculated. Finite element model of the eddy current heating was established. Experimental results show that the UD CFRP will lead to dead zone of induction heating. Simulation and experimental results have a higher consistency and reveal that components of the eddy current vector which is perpendicular to direction of carbon fiber directly lead to non-uniformity of induction heating. This will also benefit NDT for CFRP avoiding inspection dead zone.
-
Keywords:
- lock-in thermography /
- CFRP /
- eddy current heating /
- FEM simulation /
- anisotropy
-
-
[1] YARLAGADDA S, KIM H J, GILLESPIE J W,et al. A study on the induction heating of conductive fiber reinforced composites[J]. Journal of Composite Materials,2002,36:401-421.
[2] MILLER A K, CHANG C, PAYNE A,et al. The nature of induction heating in graphite-fiber, polymer-matrix composite materials[J]. Sampe Journal,1990,26(4):37-54.
[3] FINK B K, MCCULLOUGH R L, GILLESPIE J J. A local theory of heating in cross-ply carbon fiber thermoplastic composites by magnetic induction[J]. Polymer Engineering and Science,2010,32(5):357-369.
[4] NETZELMANN U, WALLE G, LUGIN S,et al. Induction thermography:principle, applications and first steps towards standardization[C]//Quantitative Infrared Thermography Asia.[S.l.]:[s.n],2016.
[5] REN W, LIU J, TIAN G Y, et al. Quantitative non-destructive evaluation method for impact damage using eddy current pulsed thermography[J].Composites Part B Engineering,2013,54(1):169-179.
[6] CHENG L, TIAN G Y. Surface crack detection for carbon fiber reinforced plastic (CFRP) materials using pulsed eddy current thermography[J]. 2012,11(12):3261-3268.
[7] HE Y, TIAN G, PAN M, et al. Impact evaluation in carbon fiber reinforced plastic (CFRP) laminates using eddy current pulsed thermography[J]. Composite Structures, 2014, 109(1):1-7.
[8] HE Y, TIAN G Y, PAN M, et al. Non-destructive testing of low-energy impact in CFRP laminates and interior defects in honeycomb sandwich using scanning pulsed eddy current[J]. Composites Part B Engineering, 2014, 59(3):196-203.
[9] LANGE R, MOOK G. Structural analysis of CFRP using eddy current methods[J]. NDT & E International, 1994, 27(5):241-248.
计量
- 文章访问数: 4
- HTML全文浏览量: 0
- PDF下载量: 4
下载:
