... coefficients, can be used to determine the elastic properties of a material or to detect macroscopic defects [ 4 – 6 ]. However, they are ineffective in monitoring damage prior to crack initiation [ 7 ]. An alternative technique to overcome these challenges is nonlinear ultrasonics, which have attracted...

...-harmonic component increases when the fatigue life falls below about 80%. While above this, the third-harmonic component decreases, and the third-order nonlinear parameters progressively increase before showing a downward trend. Sampath and Sohn [ 30 ] employed a nonlinear ultrasonic three-wave mixing...

...Hossain Ahmed; Asef Sadaf; Sourav Banerjee Methods to quantification of precursor damage in carbon fiber reinforced polymer (CFRP) composite structures are reported herein. These techniques include coda wave interferometry (CWI) and nonlinear ultrasonics (NLU). Since low-frequency Lamb wave...

... regarding the prediction of remaining service life and maintenance scheduling of industrial components. In the literature, nonlinear ultrasonic methods have proven efficient for this issue. Among them, a pump probe waves method is investigated here for possible use in an industrial context. In this article...

... feature extraction nonlinear ultrasonic ultrasonics Debonding is very common in stiffened structures due to various reasons such as stress concentration, impact, periodic loading, or manufacturing defects [ 1 , 2 ]. The functionality of the stiffened panel structures may not be compromised...

... , Y. , 2017 , “ Nonlinear Lamb Waves for Fatigue Damage Identification in FRP-Reinforced Steel Plates ,” Ultrasonics , 80 , pp. 87 – 95 . 10.1016/j.ultras.2017.05.004 [10] Wang , R. , Wu , Q. , Yu , F. , Okabe , Y. , and Xiong , K. , 2019 , “ Nonlinear Ultrasonic...

... component (QSC) materials testing nonlinear ultrasonic testing methodologies National Natural Science Foundation of China 10.13039/501100001809 12134002 12074050 52005058 11834008 Metal plate-like structures have been widely used in many practical fields such as aerospace...

...@xmu.edu.cn Email: 2321356714@qq.com Email: tenze_fortune@163.com 1 Corresponding author. Email: mxdeng@cqu.edu.cn 13 10 2022 20 03 2023 22 03 2023 17 04 2023 electromagnetics nonlinear ultrasonic testing methodologies ultrasonics National Natural...

... 2022 18 04 2022 08 05 2022 20 06 2022 elastic wave nonlinear ultrasonic on-line diagnostic approaches ultrasonics Additive manufacturing (AM) has emerged as a transformative technology [ 1 ]. However, the adoption of AM to produce critical, load-bearing components...

... be otherwise inaccessible for nondestructive evaluation. The distortion of the waveform in nonlinear ultrasonics is typically quite small, often making it difficult to distinguish from nonlinearities in the sensing system. Mutual wave interactions are preferred to wave self-interactions in this respect because...

... for damage characterization. Linear ultrasonic parameters such as the time-of-flight (related to wave velocity) and signal amplitude (related to wave attenuation) were recorded. The nonlinear ultrasonic parameter, Sideband Peak Count—Index (SPC-I), was obtained by a newly developed nonlinear analysis...

...Gheorghe Bunget; James Rogers; Cristina J. Bunget; Analeia E. Lavitz; Stanley Henley Nonlinear ultrasonic (NLU) techniques have emerged as a potential solution to improve the resolution of nondestructive measurements to detect microstructural changes of cyclically loaded materials. However, current...

...Kosuke Kanda; Shan Lin Nonlinear ultrasonic testing is considered a more promising technique for evaluating closed cracks than conventional ultrasonic testing. However, the mechanism of the generation of nonlinear ultrasonic waves has not been sufficiently explained. We first set up a system...

... to crack nucleation leading to final failure of the metallic components. It is well known within the ultrasonic community that the acoustic nonlinearity parameter is a meaningful indicator of the microstructural damage accumulation. However, current nonlinear ultrasonic techniques suffer from response...