Paper Abstract and Keywords |
Presentation |
2015-05-25 15:25
Measurement of mechanical quality factors of polymers in flexural vibration for high power ultrasonic application Jiang Wu, Yosuke Mizuno, Marie Tabaru, Kentaro Nakamura (Tokyo Tech.) US2015-13 |
Abstract |
(in Japanese) |
(See Japanese page) |
(in English) |
In this study, a method for measuring the mechanical quality factor (Q-factor) in flexural vibration at large vibration amplitude is proposed. Mechanical quality factors (Q factors) of some functional polymers under different driving frequencies and vibration velocities are measured. In this method, Q factor is calculated precisely from the vibration velocity distribution on a vibrating thin bar, being based on the original definition of Q factor, which is the ratio of the maximum reactive energy to the dissipated energy. The experimental results show that the Q factors of the polymers decrease as the driving frequency and the vibration velocity increase. The Q factor of polyphenylenesulfide (PPS) reached approximate 350 when the vibration velocity was smaller than 300 mm/s and the frequency was lower than 40 kHz, which is larger than other tested polymers. The experimental results imply that PPS is a potentially applicable material as elastomer for power ultrasonic devices. |
Keyword |
(in Japanese) |
(See Japanese page) |
(in English) |
mechanical quality factor / polymer / energy flow / reactive energy / dissipated energy / / / |
Reference Info. |
IEICE Tech. Rep., vol. 115, no. 52, US2015-13, pp. 25-30, May 2015. |
Paper # |
US2015-13 |
Date of Issue |
2015-05-18 (US) |
ISSN |
Print edition: ISSN 0913-5685 Online edition: ISSN 2432-6380 |
Copyright and reproduction |
All rights are reserved and no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopy, recording, or any information storage and retrieval system, without permission in writing from the publisher. Notwithstanding, instructors are permitted to photocopy isolated articles for noncommercial classroom use without fee. (License No.: 10GA0019/12GB0052/13GB0056/17GB0034/18GB0034) |
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US2015-13 |
Conference Information |
Committee |
US |
Conference Date |
2015-05-25 - 2015-05-25 |
Place (in Japanese) |
(See Japanese page) |
Place (in English) |
Kikai-Shinko-Kaikan Bldg. |
Topics (in Japanese) |
(See Japanese page) |
Topics (in English) |
General |
Paper Information |
Registration To |
US |
Conference Code |
2015-05-US |
Language |
English |
Title (in Japanese) |
(See Japanese page) |
Sub Title (in Japanese) |
(See Japanese page) |
Title (in English) |
Measurement of mechanical quality factors of polymers in flexural vibration for high power ultrasonic application |
Sub Title (in English) |
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Keyword(1) |
mechanical quality factor |
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polymer |
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energy flow |
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reactive energy |
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dissipated energy |
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1st Author's Name |
Jiang Wu |
1st Author's Affiliation |
Tokyo Institute of Technology (Tokyo Tech.) |
2nd Author's Name |
Yosuke Mizuno |
2nd Author's Affiliation |
Tokyo Institute of Technology (Tokyo Tech.) |
3rd Author's Name |
Marie Tabaru |
3rd Author's Affiliation |
Tokyo Institute of Technology (Tokyo Tech.) |
4th Author's Name |
Kentaro Nakamura |
4th Author's Affiliation |
Tokyo Institute of Technology (Tokyo Tech.) |
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Speaker |
Author-1 |
Date Time |
2015-05-25 15:25:00 |
Presentation Time |
25 minutes |
Registration for |
US |
Paper # |
US2015-13 |
Volume (vol) |
vol.115 |
Number (no) |
no.52 |
Page |
pp.25-30 |
#Pages |
6 |
Date of Issue |
2015-05-18 (US) |
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