Yu, Q.; Zhou, S.; Cheng, Y.; Deng, Y. Research on Delamination Damage Quantification Detection of CFRP Bending Plate Based on Lamb Wave Mode Control. Sensors2024, 24, 1790.
Yu, Q.; Zhou, S.; Cheng, Y.; Deng, Y. Research on Delamination Damage Quantification Detection of CFRP Bending Plate Based on Lamb Wave Mode Control. Sensors 2024, 24, 1790.
Yu, Q.; Zhou, S.; Cheng, Y.; Deng, Y. Research on Delamination Damage Quantification Detection of CFRP Bending Plate Based on Lamb Wave Mode Control. Sensors2024, 24, 1790.
Yu, Q.; Zhou, S.; Cheng, Y.; Deng, Y. Research on Delamination Damage Quantification Detection of CFRP Bending Plate Based on Lamb Wave Mode Control. Sensors 2024, 24, 1790.
Abstract
Carbon fiber reinforced polymer (CFRP) bending structure is widely used in the aviation field. The occurrence and propagation of delamination damage will reduce the safety of in-service bending structures. As a detection tool with high damage sensitivity, Lamb wave can effectively identify delamination damage. In this study, the signal difference coefficient (SDC) was introduced to quantify delamination damage and evaluate the sensitivity of A0 and S0 mode lamb waves to delamination damage. The simulation results show that compared with the S0 mode Lamb wave, the A0 mode Lamb wave exhibits higher delamination damage sensitivity. The delamination damage can be quantified based on the strong correlation between the SDC and the delamination damage size. The control effect of the linear array PZT phase time-delay method on Lamb wave mode was investigated by simulation. The phase time-delay method realizes the generation of a single-mode Lamb wave, which can separately excite the A0 mode and S0 mode Lamb wave to identify delamination damage of different sizes. The A0 mode Lamb wave was excited by the developed one-dimensional linear comb transducer (LCT), which was used to conduct the detection experiment on the CFRP bending plate with delamination damage sizes of Φ6.0 mm, Φ10.0 mm, and Φ15.0 mm. The experimental results verify the correctness of the simulation. According to the Hermite interpolation results of the finite-element simulation data, the relationship between the delamination damage size and the SDC was fitted by the Gaussian function, which can accurately quantify the delamination damage. The absolute error of the delamination damage quantification with fitting expression is not larger than 0.8 mm, and the percentage error is not more than 8%.
Keywords
Lamb wave mode control; phase time-delay method; CFRP bending plate; linear comb transducer; signal difference coefficient; quantification of delamination damage
Subject
Engineering, Mechanical Engineering
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
