Thermal Effect on Band Gaps of 1D Metallic Phononic Crystals

7th Annual International Conference on Materials Science and Engineering

Lan, Man^1 ; An, Xiuyun^1

Department of Mathmatics and Science, Luoyang Institute of Science and Technology, Mudan Street, Luo Yang, Henan Province, China^1

关键词: Dispersive curves;    Dispersive equations;    High frequency HF;    Low frequency regions;    Material coefficients;    Metallic material;    Shear horizontal waves;    Thermo sensitive;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/562/1/012032/pdf
DOI  :  10.1088/1757-899X/562/1/012032

来源: IOP

【 摘 要 】

We have investigated thermal effect on band gaps of shear horizontal (SH) waves propagating through a layered metallic periodic structure. For a metallic material, the lattice length varies slightly with temperature while the Young's modulus is strongly thermosensitive. Firstly, the dispersive equation without thermal effect was derived by the transfer matrix method. Secondly, the thermal effect on the material coefficients was investigated. Finally, the dispersive curves at different temperatures with changing incident angles were drawn. It reveals that the band gaps get a greater impact in high-frequency regions than those in low-frequency regions. The results can provide theoretical basis for the production of phononic crystals.