学術雑誌論文

学術雑誌論文

text

Ultrasonics. 2014, 54(7), p. 1963-1966

Calibration-free portable Young's-modulus tester with isolated langasite oscillator

Elsevier B.V.

英語

text

2014-05-15

https://doi.org/10.1016/j.ultras.2014.05.002

A ballpoint-pen-type portable ultrasonic oscillator is developed for quantitative measurement of Young's modulus on a solid. It consists of an electrodeless rod-shaped langasite oscillator with a tungsten-carbide spherical-shaped tip at the end, permanent magnets for making a constant force at the contact interface, and antennas for exciting and detecting the longitudinal vibration contactlessly. The resonance frequency of the oscillator is changed by contact with the specimen, reflecting Young's modulus of the specimen at the contact area. The langasite oscillator is supported at the nodal points so that its acoustical contact occurs only at the specimen, making a calibration-free measurement realistic. Young's moduli of various specimens were evaluated within 15% error just by touching the specimens with the probe. The error becomes smaller than 10% for lower Young-modulus materials (<∼150 GPa). © 2014 Elsevier B.V. All rights reserved.

© 2014 Elsevier B.V. This manuscript version is made available under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

84199

Calibration-free portable Young's-modulus tester with isolated langasite oscillator

Elsevier B.V.

英語

2014-05-15

Ultrasonics

54

7

1963

1966

https://doi.org/10.1016/j.ultras.2014.05.002

https://hdl.handle.net/11094/84199