Surface Crack Detection for Carbon Fiber Reinforced Plastic (CFRP) Materials Using Pulsed Eddy Current Thermography
Surface Crack Detection for Carbon Fiber Reinforced Plastic (CFRP) Materials Using Pulsed Eddy Current Thermography
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DOI：
10.1109/jsen.2011.2157492
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发表时间：
2011-12-01
影响因子：
4.3
通讯作者：
Tian, Gui Yun
中科院分区：
文献类型：
--
作者：
Cheng, Liang;Tian, Gui Yun
目前，在许多行业中需要检查碳纤维增强塑料（CFRP）部件，例如用于飞机和用于风力涡轮机叶片的部件，以识别导致潜在故障的问题。为了检测表面裂纹，脉冲涡流（PEC）热成像被提出作为一种强大的检测技术，允许操作者使用红外成像观察从结构中的涡流分布产生的加热，在短时间内（毫秒级）检测相对宽的区域上的缺陷。本文研究并优化了一种碳纤维增强复合材料PEC热成像检测系统。使用该系统，通过表面加热模式观察CFRP材料的方向导电性。然后，归一化的温升和衰减进行了研究，通过不同的深度和宽度的缺口的检查。实验中还研究了线圈沿光纤方向相对于切口沿着的位置不变性。研究表明，通过分析表面加热模式和瞬时温度变化，PEC热成像技术可用于缺陷检测和表征。
There is currently a requirement in many industries to inspect carbon fiber reinforced plastic (CFRP) components, such as those used in aircraft and for wind turbine blades to identify issues leading to potential failures. To detect surface cracks, pulsed eddy current (PEC) thermography is proposed as a powerful inspection technique, allowing the operator to observe the heating developed from the eddy current distribution in a structure using infrared imaging, detecting defects over a relatively wide area within a short time (of the order of milliseconds). In this paper, a PEC thermography inspection system for CFRP materials is studied and optimized. Using the system, the directional electrical conductivity of the CFRP material is observed through the surface heating pattern. Then, the normalized temperature rise and decay are investigated through the inspection of notches with varied depths and widths. The position invariance of the coil with respect to the notch along the fiber direction is also studied in the experiments. The work shows that PEC thermography can be used for defect detection and characterization through analysis of the surface heating pattern and the transient temperature change.