Measurement of the Clamping Force Applied by Load-Bearing Bolts Using a Combination of Compression and Shear Ultrasonic Waves

被引：2

作者：

Carlson, Johan E. ^{[1
]}

Lundin, Peter ^{[2
]}

机构：

[1] Lulea Univ Technol, Div Signals & Syst, SE-97187 Lulea, Sweden

[2] Swerea KIMAB, SE-16440 Kista, Sweden

来源：

2015 IEEE INTERNATIONAL ULTRASONICS SYMPOSIUM (IUS) | 2015年

关键词：

D O I：

10.1109/ULTSYM.2015.0079

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

Quantitative measurement of the clamping or tightening force of rods and bolts is important when assessing the structural integrity of various constructions. This paper shows that by using a bi-wave ultrasonic pulse-echo technique, it is possible to determine this tightening force without the need of extensive calibration prior to installing the bolts. We show that the ratio of the time-of-flight (TOF) between the transversal and the longitudinal waves changes linearly with the clamping force and that we only need to know the TOF of the unstrained bolt prior to installment. This is then demonstrated experimentally on a 1.1 m rock bolt, using pulses that propagated 6.6 m. Two different methods for estimation of the TOF ratio are evaluated.

引用

页数：4

共 29 条

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