Ultrasonic metrics for large-area rapid wrinkle detection and classification in composites
Abstract
Due to their high strength-to-weight ratio, composite materials are now in use in many high-stress applications, particularly where light weight is also a requirement. In these situations, the detrimental knock-down in mechanical strength due to an out-of-plane wrinkle defect can have serious consequences and is the reason for a requirement to rapidly detect any such wrinkles at manufacture. Unfortunately, current ultrasonic inspection techniques used for quality control at manufacture are not sensitive enough to detect these wrinkles above coherent structural noise variations. This paper exploits the ply resonance that is a characteristic of multi-layer structures to generate two new metrics for both detection and classification of out-of-plane wrinkles, due to their perturbations of the ply spacing. These can be measured at every location on a structure using the instantaneous frequency, which is the rate of change of phase in the pulse-echo ultrasonic response. The proposed two new metrics for detection anCitation
Smith RA, Tayong RB, Nelson LJ, Mienczakowski MJ, Wilcox PD (2024) 'Ultrasonic metrics for large-area rapid wrinkle detection and classification in composites', Insight - Non-Destructive Testing & Condition Monitoring, 66 (3), pp.141-152.Publisher
UltrasonicsAdditional Links
https://www.ingentaconnect.com/content/bindt/insight/2024/00000066/00000003/art00003Type
ArticleLanguage
enISSN
1354-2575ae974a485f413a2113503eed53cd6c53
10.1784/insi.2024.66.3.141