| Summary: | 碩士 === 淡江大學 === 航空太空工程學系 === 89 === In this study, the multi-layered medium made by anisotropic material bearing dynamic antiplane loading is investigated. The study of this problem will make the application of multi-layered stress wave propagation no longer restricted in isotropic or orthotropic materials, and also will be an example for studying anisotropic dipping layer problem in the future.
When stress wave meets the boundary of different layer of material, reflected wave and transmission wave would take place. As to composite materials, there’s not only one boundary, so the stress wave would reflect and transmit constantly. This causes an infinite number of waves, and how to conclude and calculate these stress wave is so difficult that make the solution of problems such hard to be achieved.
A useful fundamental solution is proposed in this study, and the solution can be determined by superposition of the fundamental solution in Laplace transform domain. And also will we use the integral transformation and the matrix Bromwich expansion to solve such problem. Finally, we would use Cagniard-de Hoop method to inverse the solution to get solution under time domain. As to numerical calculation, we would use thin layer problem as an example to investigate the transient wave propagation under different material constants and observe point.
|
|---|
