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Factors controlling superelastic damping
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SYSNO ASEP 0348281 Document Type C - Proceedings Paper (int. conf.) R&D Document Type Conference Paper Title Factors controlling superelastic damping Author(s) Heller, Luděk (FZU-D) RID, ORCID
Šittner, Petr (FZU-D) RID, ORCID
Landa, Michal (UT-L) RIDSource Title School and Symposium on Smart Structural Systems Technologies. - Porto : FEUP, 2010 / Barros R. ; Preaumont A. - ISBN 978-989-96697-0-3 Pages s. 453-469 Number of pages 17 s. Action S(3)T 2010, Smart Structural Systems Technologies Event date 06.04.2010-09.04.2010 VEvent location Porto Country PT - Portugal Event type EUR Language eng - English Country PT - Portugal Keywords shape memory alloys, ; superelastic damping ; thermomechanical testing Subject RIV BM - Solid Matter Physics ; Magnetism R&D Projects GAP108/10/1296 GA ČR - Czech Science Foundation (CSF) CEZ AV0Z10100520 - FZU-D (2005-2011) AV0Z20760514 - UT-L (2005-2011) Annotation The extent to which the stress induced martensitic transformation displays the hysteretic nature predetermines the use of the superelasticity for passive damping purposes. As the occurrence of the superelastic behaviour depends on the external conditions the SMAs are subjected to, the efficiency of the superelastic damping is presumably influenced by the operating conditions of SMA dampers. Therefore, we identified experimentally the dependence of the superelastic damping of a commercially available thin NiTi wire on several operating parameters such as vibration amplitude, prestrain, temperature of surroundings, and frequency. Furthermore, a phenomenological SMA model coupled with the heat equation was used to explain the frequency dependence of the superelastic damping. The conducted analysis showed clearly that the superelastic damping can be used efficiently only while setting the operating conditions within a limited range. Workplace Institute of Physics Contact Kristina Potocká, potocka@fzu.cz, Tel.: 220 318 579 Year of Publishing 2011
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