Thermoelastic Damping in Functionally Graded Microbeam Resonators

• Published in: IEEE sensors journal Vol. 17; no. 11; pp. 3381 - 3390
• Main Authors: Zhong, Zuo-Yang, Zhou, Jian-Ping, Zhang, Hai-Lian
• Format: Journal Article
• Language: English
• Published: New York IEEE 01.06.2017; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: Composite beams; Constituents; Damping; dynamics; Energy dissipation; functionally graded materials; Functionally gradient materials; Heating systems; Mathematical model; Microbeams; Microcavities; microresonator; Monolithic materials; Resonators; Sensors; Thermodynamic properties; Thermoelastic damping
• ISSN: 1530-437X; 1558-1748
• DOI: 10.1109/JSEN.2017.2694550

Recently, the functionally graded materials (FGMs) have gained considerable attention. The thermoelastic damping (TED) plays an important role in the inherent energy dissipation of the microbeam resonators. In this paper, TED in the FGMs microbeam and composite beam resonator are derived and investigated. The results show that: The TED in composite beam is always larger than the value of monolithic material beam. However, for some values of the exponent parameter n , one can obtain a kind of specific FGMs beam (e.g., n=1 or 2) whose TED can be smaller than the values of both the original constituent materials. Moreover, as a function of the geometry, mechanical, and thermodynamic properties of the beam constituent material, it finds that a secondary peak appears in the FGMs beam resonator.