Transient Elastic Waves Propagating in a Two-Layered Piezoelectric Medium Subjected to the Mechanical and Electrical Concentrated Loadings

• Main Authors: Kuo-Shu Huang, 黃國書
• Other Authors: Yi-Shyong Ing
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/66176725181073204278

碩士 === 淡江大學 === 航空太空工程學系碩士班 === 99 === In this study, transient elastic waves propagating in a two-layered piezoelectric medium subjected to anti-plane concentrated loading and in-plane electric displacement loading on the upper and lower free surfaces are investigated. The double-layer composite is constructed of two layers of piezoelectric materials with different thicknesses. The one-sided and the two-sided Laplace transforms are applied to obtain the shear stresses and the electric displacements in the transform domain. And then, the Durbin’s method for one-sided Laplace transform inversion and the extended Durbin’s method for two-sided Laplace transform inversion are used to carry out the numerical inversions. The numerical results for different field points, different ratios of thicknesses and different loading types are evaluated and discussed in detail.