Research Project
Grant-in-Aid for Young Scientists (Start-up)
This study investigates the use of ultrasonic second harmonic components in the quality control of bolt fastened structures. The second harmonic components from a fastened bolt were detected using a double-layered piezoelectric ultrasonic transducer (DLPT). The fundamental ultrasonic pulse waves (1MHz) are transmitted when the DLPT is electrically connected in parallel, while the second harmonic ultrasonic components (2MHz) are detected when the DLPT is connected in series. A hexagon head bolt (the diameter and length of the screw are 12mm and 100mm) was used in the experiments. The bolt was fastened by an axial force of 20kN. The second harmonic component increased by approximately 15dB before and after the bolt was fastened.
All 2010 2009 2008 Other
All Journal Article (7 results) (of which Peer Reviewed: 7 results) Presentation (30 results) Book (1 results) Remarks (3 results) Patent(Industrial Property Rights) (2 results)
Int.J.Soc.Mater.Eng.Resour. Vol. 17, No. 1
Pages: 73-77
110007554387
Int.J.Soc.Mater.Eng.Resour. 17
IEICE Electron.Exp. Vol. 6, No. 20
Pages: 1438-1443
130000121814
IEICE Electron.Exp. 6
Acoust.Sci.&Tech. Vol. 29, No. 6
Pages: 399-402
110006967411
Jpn. J. Appl. Phys 47
Pages: 3899-3903
Acoust. Sci. & Tech 29
http://www.imano-lab.ee.akita-u.ac.jp/
http://www.imano-lab.ee.akita-u.ac.jp/achiv.html