A study of bolt fastening evaluation using second harmonic ultrasonic pulse waves

Author

Fukuda, Makoto ; Imano, Kazuhiko

Author_Institution

Dept. of Electr. & Electron. Eng., Akita Univ., Akita, Japan

fYear

2012

fDate

2-5 Oct. 2012

Firstpage

69

Lastpage

72

Abstract

This study examines the use of ultrasonic second harmonic components in the quality control of bolt-fastened structures. An improved method for detecting the second harmonic components, from a bolt fastened with a nut, using the transmission method is constructed. A hexagon head iron bolt was used in the experiments. The bolt was fastened using a digital torque wrench. The second harmonic component increased by approximately 10 dB before and after the bolt was fastened. The sources of second harmonic components were contact acoustic nonlinearity in the screw thread interfaces of the bolt-nut and were the plastic deformation in the bolt with fastening bolt. This result was almost same compared with previous our method. Consequently, usefulness of the novel method for detecting second harmonic ultrasonic components generated from fastened bolt was confirmed.

Keywords

fasteners; mechanical contact; plastic deformation; power transmission (mechanical); quality control; ultrasonic waves; bolt fastening evaluation; contact acoustic nonlinearity; digital torque wrench; hexagon head iron bolt; nut; plastic deformation; quality control; screw thread interface; second harmonic component detection; second harmonic ultrasonic pulse wave; transmission method; Acoustics; Fasteners; Harmonic analysis; Joining processes; Plastics; Torque; Ultrasonic variables measurement; Contact acoustic nonlinearity; Hexagon head iron bolt; Second harmonic component; Torque; Ultrasonic pulse waves;

fLanguage

English

Publisher

ieee

Conference_Titel

Consumer Electronics (GCCE), 2012 IEEE 1st Global Conference on

Conference_Location

Tokyo

Print_ISBN

978-1-4673-1500-5

Type

conf

DOI

10.1109/GCCE.2012.6379959

Filename

6379959