Abstract
Multiple types of defects, including delamination, waviness and porosity may be produced during the composite manufacturing process and service life, which increase the risk of structural failure and also introduce the challenge for defect detection and characterisation. In this study, delamination within wavy composites was inspected with improved signal-to-noise ratio (SNR) by using the optimised wave mode from simulation results. Wave interaction of longitudinal and shear waves with waviness and delamination was simulated in CIVA software. To validate the simulation results, waviness and delamination were detected with desirable wave mode by using an angle-adjustable wedge to control the incident wave mode. Longitudinal waves were found to be sensitive to out-of-plane waviness and shear wave is suitable for delamination detection within wavy region. Results from both simulation and experiment demonstrated that B-scan images obtained from both longitudinal and shear waves can characterise delamination from waviness.
How to Cite:
Zhen, Z. ., Feng, A., Malcolm, A. . & Fang, C. ., (2019) “Improvements to ultrasonic inspection of delamination within wavy composites”, Review of Progress in Quantitative Nondestructive Evaluation .
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