Thermoelastic damping in bilayered microbar resonators with circular cross-section

2017 International Conference on Material Engineering and Manufacturing

Liang, Xiaoyao^1 ; Li, Pu^1

School of Mechanical Engineering, Southeast University, Jiangning, Nanjing 211189, China^1

关键词: Axial loading;    Bilayered;    Circular cross-sections;    Convergence rates;    Distribution of temperature;    Thermoelastic damping;    Time harmonic;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/265/1/012023/pdf
DOI  :  10.1088/1757-899X/265/1/012023

来源: IOP

【 摘 要 】

It is always a challenge to determine the Thermoelastic damping (TED) in bilayered microbars precisely. In this paper, a model for TED in the bilayered and cantilevered microbar was proposed, in which the total damping was derived by calculating the energy evanished in each layer. The distribution of temperature in the bilayered microbar with a thermodynamically ideal boundary receiving a time-harmonic force is obtained. An infinite summation for the computing of TED in the bilayered slender microbars under axial loading is presented, and the convergence rate of it is discussed. There are little differences between the results computed by our model and that by finite element method (FEM).