Ultrasonic inspection techniques are widely used for nondestructive evaluation of materials. Mathematical modeling provides an efficient and reliable method to assist the design of the inspection application and the analysis of its results. In this work we use a method based on the Rayleigh-Sommerfeld integral to express the pressure in a fluid generated by different ultrasonic devices like mon...

A nondestructive ultrasonic measurement system was developed for the assessment of some transmission parameters which might have quantitative relations with the maturity, firmness and other quality-related properties of avocado and mango fruits. The system utilizes a set of low-frequency probes arranged to measure the ultrasonic signal transmitted and received over a short distance across the p...

Stress in laser cladding coating is an important factor affecting the safe operation of remanufacturing components. Ultrasonic testing has become a popular approach in the nondestructive evaluation of stress, because it has the advantages of safety, nondestructiveness, and online detection. This paper provides a review of ultrasonic testing for stress in remanufacturing laser cladding coating. ...

This paper presents ultrasonic guided wave (UGW) propagation-based nondestructive testing (NDT) of an adhesively bonded composite structure (ACS). In the process, a series scanning laser Doppler vibrometry (SLDV)-based laboratory experiments and time-domain spectral element method (SEM)-based numerical simulations were carried out on ACS with barely visible impact damage (BVID) hole. A good agr...

Ultrasonic testing is a versatile and important nondestructive testing method. In many industrial applications, ultrasonic testing is carried out at relatively high temperatures. Since the ultrasonic w...

By the uncertainty, the common Nondestructive quantitative testing data could not meet the needs of the basic request of Nondestructive evaluation and reliability safety analysis in actual engineering. In this article, used the uncertainty evaluation method, the regress analysis and the fuzzy theory, the soft calibration method was built for uncertainty of measurement of nondestructive quantita...

Abstract Defect characterisation is an essential step of nondestructive testing which aims to determine the shape and size a defect once detected. The imaging algorithm multi-view Total Focusing Method (TFM) has been successfully used accurately defects greater than several times wavelength. However, characterising smaller remains difficult due diffraction limit. This paper introduces as proof ...

A methodology is presented for health monitoring and subsequent inspection of critical structures. Algorithms have been developed to detect and approximately locate damaged regions by analyzing signals recorded from a permanently mounted, sparse array of transducers. Followup inspections of suspected flaw locations are performed using a dual transducer ultrasonic approach where a permanently mo...

Two nondestructive evaluation (NDE) laboratory-based courses were developed for Engineering and Engineering Technology (ET) students of Drexel University. The ultrasound NDE laboratory allows for participation in laboratory activities in two modes: the traditional face-to-face classroom mode for students on Drexel’s campus, and a real-time, Internet-based mode for those at remote locations. Dur...

This paper presents a comprehensive review of the current state of knowledge of second harmonic generation (SHG) measurements, a subset of nonlinear ultrasonic nondestructive evaluation techniques. These SHG techniques exploit the material nonlinearity of metals in order to measure the acoustic nonlinearity parameter,β. In these measurements, a second harmonic wave is generated from a propagati...