METHOD OF MEASURING DISTRIBUTION OF AXIAL FORCE OF LOCK BOLT AND THE LOCK BOLT

摘要

PROBLEM TO BE SOLVED: To provide the method of measuring distribution of axial force of a lock bolt capable of surely measuring the axial force with easy management; and to provide the lock bolt.;SOLUTION: At the time of execution of the solid lock bolt 10, the ultrasonic measurement is previously performed such that from the input part 11 being an exposed part of the lock bolt 10, the ultrasound is transmitted and received for measuring the receiving time difference between the reference points. Afterward, the ultrasonic measurement is performed again, for calculating the axial force from the change of the received time difference. The lock bolt is provided with reference points between the ultrasound incident part 11 and the end part 12, for reflecting the ultrasound.;COPYRIGHT: (C)2006,JPO&NCIPI