Diagnostics of tension in long rods with the help of traveling bending waves

• Published in: IOP conference series. Materials Science and Engineering Vol. 1151; no. 1; pp. 12014 - 12020
• Main Authors: Bardakov, V M, Klimov, N N, Ermakov, A A, Pomerantsev, D Yu
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 01.05.2021
• Subjects: Bend tests; Compression tests; Longitudinal waves; Measurement methods; Propagation velocity; Railway engineering; Railway tracks; Thickness; Velocity; Wave propagation; Workpieces
• ISSN: 1757-8981; 1757-899X
• DOI: 10.1088/1757-899X/1151/1/012014

Abstract The article considers the possibility of measuring the tension of long thin structures by measuring the speed of traveling bending waves. Earlier, with the participation of the first two authors of the work, a theoretical consideration of the possibility of determining the stress of a continuous-welded railway track by measuring the velocity of bending waves was carried out. For verification, the velocity of propagation of bending waves was measured, presumably during the compression of a continuous-welded track. This is possible when the temperature of the rails is higher than the laying temperature of the continuous track. In the same consideration, it is taken into account that bending waves exist in an extended product of finite thickness without tension, and the results are presented for the case when the continuous track is in a tensioned state. This consideration takes into account the fact that in a long workpiece of finite thickness there are also bending waves without tension. These waves, unlike the dispersion-free waves of tension, possess dispersion. A method of measuring the speed of these waves is proposed.