Non-destructive testing of low-energy impact in CFRP laminates and interior defects in honeycomb sandwich using scanning pulsed eddy current

作者：He, Yunze^*; Tian, GuiYun; Pan, Mengchun; Chen, Dixiang

来源：Composites Part B: Engineering , 2014, 59: 196-203.

DOI：10.1016/j.compositesb.2013.12.005

• Carbon fibres
• Delamination
• Impact behaviour
• Non-destructive testing

With the growing interest to use composite materials and honeycomb sandwich panels in industrial fields, much attention is devoted to the development of non-destructive testing (NDT) techniques for the detection and evaluation of defects. In this work, scanning pulsed eddy current (PEC) was investigated and two features, representing the magnetic field intensity and conductivity, were used to characterise the different types of defects in carbon fibre reinforced plastics (CFRP) laminates and honeycomb sandwich panels. The experimental results show that the low energy impact from 4 J to 12 J, conductive and non-conductive insert defects can be effectively detected and evaluated using the proposed methods. The effectiveness was verified and the advantages of scanning PEC were addressed through comparative studies with flash thermography and shearography.

• 出版日期2014-3
• 单位中国人民解放军国防科学技术大学