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Paper Abstract and Keywords
Presentation 2017-12-11 15:55
Measurement of mechanical quality factor of poly phenylene sulfide in high-amplitude longitudinal vibration and improvement of vibration characteristics
Jiang Wu, Yosuke Mizuno, Kentaro Nakamura (Tokyo Tech.) US2017-79
Abstract (in Japanese) (See Japanese page) 
(in English) On the basis of the original definition of mechanical quality factor (Q factor), in previous studies, we developed a method for measuring the Q factors of polymers under high-amplitude flexural vibration, and found that poly phenylene sulfide (PPS) exhibited relatively high Q factors. It indicates that PPS is potentially applicable as vibrating bodies of ultrasonic devices. To gain a deeper understanding on the mechanical-loss characteristics of PPS, in this study, we modify the former method to measure the Q factors in longitudinal vibration. The Q factor equals the ratio of the reactive energy stored in a small region of the sample to the dissipated energy when the elastic waves propagate along this region, and both of them can be obtained from the vibration velocities on the outer surface, and the mechanical constants of the material. The experimental results demonstrate that the Q factor of PPS exceeds 400 in longitudinal vibration. Besides, through thermal treatment, it is capable of enhancing the Q factors of PPS.
Keyword (in Japanese) (See Japanese page) 
(in English) PPS / Polymer / high-amplitude vibration / Q factor / / / /  
Reference Info. IEICE Tech. Rep., vol. 117, no. 342, US2017-79, pp. 25-29, Dec. 2017.
Paper # US2017-79 
Date of Issue 2017-12-04 (US) 
ISSN Print edition: ISSN 0913-5685    Online edition: ISSN 2432-6380
Copyright
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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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Conference Information
Committee US  
Conference Date 2017-12-11 - 2017-12-11 
Place (in Japanese) (See Japanese page) 
Place (in English)  
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Paper Information
Registration To US 
Conference Code 2017-12-US 
Language English (Japanese title is available) 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Measurement of mechanical quality factor of poly phenylene sulfide in high-amplitude longitudinal vibration and improvement of vibration characteristics 
Sub Title (in English)  
Keyword(1) PPS  
Keyword(2) Polymer  
Keyword(3) high-amplitude vibration  
Keyword(4) Q factor  
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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 Kentaro Nakamura  
3rd Author's Affiliation Tokyo Institute of Technology (Tokyo Tech.)
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Speaker Author-1 
Date Time 2017-12-11 15:55:00 
Presentation Time 25 minutes 
Registration for US 
Paper # US2017-79 
Volume (vol) vol.117 
Number (no) no.342 
Page pp.25-29 
#Pages 5 
Date of Issue 2017-12-04 (US) 

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