A Study on the Advance of Measuring Accuracy of High Tension Bolt Axial Force Using Ultrasonic Acoustoelasticity Effects

초음파 음탄성효과를 이용한 고장력 볼트의 축력측정정도 향상에 관한 연구

In this paper, the axial force of high tension bolt is measured by using ultrasonic wave. In the case of the different materials the conclusion obtained are as follows : (1) The relation of the material quality of each high tension bolt and form(diameter or section area), and yield axial force can be observed. (2) As 0.1 is devided by the apparent elongation the measurement accuracy of high tension bolt can be achived. Also, it is founded that the Joint axial force of high tension bolt is determined by the yield force.