... of macroscopic cracks [ 37 ] and the total AE count increases until the final fracture of the specimen. The basic idea of AE monitoring is to capture the rapid release of ultrasonic waves generated during the fracture process. For solid materials, the generation of new fractured surfaces can be caused...

... component (QSC) of ultrasonic longitudinal waves induced by acoustic radiation. The experiments quantitatively observe the response of the QSC pulse to different levels of aging degradation. A pulse-echo ultrasonic transducer is employed to simultaneously capture the primary longitudinal wave (PLW) and QSC...

... failure analysis materials testing mechanical engineering online diagnostic approaches sensors service life prediction structural engineering testing methodologies ultrasonics Engineering and Physical Sciences Research Council 10.13039/501100000266 EP/V055577/1 Structural...

...R. Vidya Sagar; Priyan Roy T.; Tribikram Kundu This article reports the observation made during the compressive fracture process of cementitious materials, which has been studied using nonlinear ultrasonic testing (NUT) and acoustic emission (AE) testing techniques. The generated higher harmonics...

...Jee Myung Kim; Kara Peters Fiber Bragg grating sensors have been applied in the remote-bonding configuration for structural health monitoring, in which ultrasonic modes are propagated along the optical fiber to the sensor. Recently, coupling of the ultrasonic mode from optical fiber to optical...

...Joseph S. Cregeen; Rachel S. Edwards Ultrasonic inspection of conductive samples can be performed using electromagnetic acoustic transducers (EMATs). These allow generation of guided waves, such as Lamb waves, in thin plates. Lamb waves are used for defect screening as they can travel long...

...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...

...N. Pavan Kumar; V. H. Patankar The purpose of this research work is to establish the functionality of the novel ultrasonic non-destructive inspection system and accurate gauging of pipes and to locate and visualize flaws in the form of B-scan cross-sectional view (front-view) of the pipe under test...

.... The datasets generated and supporting the findings of this article are obtainable from the corresponding author upon reasonable request. References [1] Rose , J. L. , 2014 , Ultrasonic Waves in Solid Media , Cambridge University Press , pp. 1 – 512 . [2] Cawley , P. , 2018...

...A. Perrin; C. Gueudré; M. A. Ploix; G. Corneloup; T. J. Ulrich; Luke Beardslee; P. Recolin; C. Payan Ultrasonic measurements are commonly used for crack sizing in the industrial context, but due to potential partial crack closure, the crack depth can be underestimated. It could be of importance...

...Florian Ouvrier-Buffet; Jesús N. Eiras; Vincent Garnier; Benoît Durville; Cédric Payan Nonlinear ultrasonic parameters are known to be highly sensitive to the presence of damage in materials, and numerous methods have already been reported. This study proposes a way to image a nonlinear defect...

...Mingyue Zhang; Luis Waldo Escalona Galvis; Antonino Spada; Margherita Capriotti The nondestructive characterization and monitoring of defects in composite structures by ultrasonic guided waves are hindered by the complexity of the interaction. Efficient computational modeling of propagating...

... introduce an automated nondestructive testing system that scans the part using an immersed ultrasonic array probe guided by a robot arm. For imaging, we adopt a two-step, surface-adaptive Total Focusing Method (TFM) approach. For each test position, the TFM allows us to identify the outer surface, followed...

... 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...

... Hz. Meanwhile, a 200 kHz ultrasonic excitation was applied on the beam to monitor its propagation through the crack. The closing and opening of the crack generate the nonlinear behavior of the ultrasonic pulse. A considerable increment of nonlinearity was observed demonstrating the efficacy...

... PWAS = piezoelectric wafer active sensor SHM = structural health monitoring SIF = stress intensity factor SMOTE = synthetic minority oversampling technique acoustic emission damage classification diagnostic feature extraction elastic wave prognosis sensors ultrasonics...

...Steven C. Hespeler; Hamidreza Nemati; Nihar Masurkar; Fernando Alvidrez; Hamidreza Marvi; Ehsan Dehghan-Niri This journal paper explores the application of Deep Learning (DL)-based Time-Series Classification (TSC) algorithms in ultrasonic testing for pipeline inspection. The utility...

... Email: tkundu@arizona.edu acoustic source localization signal energy–based approach carbon fiber–reinforced polymer composite plate sensors acoustic emission elastic wave ultrasonics Acoustic source localization (ASL), i.e., the process of estimating the location of the acoustic...

... of structures made of metallic materials. This article presents a newly developed and promising nonlinear ultrasonic (NLU) technique called sideband peak count- i ndex (or SPC-I) for monitoring the early stages of elastoplastic deformation in ductile metallic alloy Al6061. Experimental results presented...

... transducers (EMATs) designed and applied for exciting and receiving ultrasonic signals can maintain the coupling condition consistently on the measure of higher harmonics generated. EMAR provides a sufficient magnitude of signals for higher harmonics generated. In addition, the conventional EMAR technique...