碳纤维增强复合材料冲击缺陷脉冲涡流无损检测仿真与试验研究∗

摘要

为了对碳纤维增强复合材料( CFRP )冲击缺陷进行检测，提出基于磁通密度y分量的脉冲涡流检测法。通过有限元仿真，分析电导率差异对涡流磁场的影响。通过实验研究，利用小波包能量法验证仿真结果的准确性。仿真与实验结果表明：基于磁通密度y分量的脉冲涡流检测法可以有效识别冲击缺陷，并且能够区分不同冲击大小对碳纤维增强复合材料损伤的差异。%In order to evaluate impact damage of carbon fiber reinforced plastic(CFRP),the method of PEC based on magnetic field of y component is proposed. The influence of conductivity differences on the eddy current magnetic field is analyzed by finite simulation. The simulation results are demonstrated by experiments using the method of wavelet packet energy analysis. Simulation and experimental results show that the method of PEC based on magnetic field of y component can effectively identify defect caused by impact energy,and characterize the damages caused by different impact energy.