Published in Russian Journal of Nondestructive Testing
AbstractAlcohol is widely used in various fields today. Alcohol overdose and its improper use can cause many health problems. Drinking liquids with high alcohol concentration, especially methanol, causes poisoning, and the use of colognes with high alcohol concentration causes various skin conditions and respiratory diseases. Therefore, for public ...
Published in Russian Journal of Nondestructive Testing
AbstractWe solve an inverse geometric problem of identifying an internal curvilinear defect in an orthotropic elastic layer. Defect parameters (location, depth, size, orientation) are determined based on an acoustic analysis of displacement fields and their characteristics measured on part of layer’s upper boundary. We consider a steady-state oscil...
Published in Russian Journal of Nondestructive Testing
AbstractDefect of roller bearings shell may have many defects for rotary machines due to alternative connection forces and external impact loads, such as surface cracks fault results from corrosion or wear. Investigating the methods of detecting surface cracking defects for roller bearings shell is very useful for maintaining these machines. The ne...
Published in Russian Journal of Nondestructive Testing
AbstractThe topical problem of assessing the residual resource of nonrigid road pavements of highways is studied. An energy method has been developed to solve this problem. The method is based on comparing the actual total dissipation of energy in the pavement structure determined from field measurements using an FWD shock loading unit and the tota...
Published in Russian Journal of Nondestructive Testing
AbstractIt has been shown that in order to increase the sensitivity of ultrasonic noncontact shadow testing of products made of polymer composite materials (PCMs), it is necessary, along with the well-known techniques (increasing the amplitude of the probing signal, using radio technical signal processing methods, employing highly sensitive electro...
Published in Russian Journal of Nondestructive Testing
AbstractIssues of quality control of welded joints in hot-tool butt-welded polyethylene pipelines are considered. It is indicated that the main scope of control currently falls on inspections based on the parameters of welding and on selective mechanical testing of welded joints. Physical nondestructive post-welding testing methods are used little,...
Published in Russian Journal of Nondestructive Testing
AbstractComputer aided Interpretation of Ultrasonic signals depicting flaws in weld pieces is depicted in this work. In this work, feasibility of Long Short Term Memory (LSTM) for flaw characterization is studied. Owing to the advantage of LSTM, the first technique involves training LSTM directly with the signals as inputs and testing its ability t...
Published in Russian Journal of Nondestructive Testing
AbstractTest pieces are principal elements in the utilization of ultrasonic testing equipment. This is particularly evident when testing takes place for parts produced by additive manufacturing (AM) processes. In light of common defects in these types of parts, e.g. gas and powder cavities, lack of fusion, etc., as well as differences in the formin...
Published in Russian Journal of Nondestructive Testing
AbstractStatic tests of the samples of Torayca T700, T800 carbon fiber reinforced plastics consisting of nine monolayers with \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{docum...
Published in Russian Journal of Nondestructive Testing
AbstractAt present, technologies for continuous ultrasonic monitoring of the state of extended structures using elastic guided waves excited and measured by an array of piezoelectric wafer active sensors are being actively developed. Guided waves interact with inhomogeneities (defects) of any nature, revealing their presence by reflected and scatte...
