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題 名 | Elastic Wave Propagation and Nondestructive Evaluation of Materials=彈性波傳與材料非破壞檢測 |
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作 者 | 吳政忠; | 書刊名 | Proceedings of the National Science Council : Part A, Physical Science and Engineering |
卷 期 | 23:6 1999.11[民88.11] |
頁 次 | 頁703-715 |
分類號 | 440.12 |
關鍵詞 | 彈性波傳; 材料; 非破壞檢測; Elastic wave; Nondestructive evaluation; Anisotropy; Crack; Concrete; |
語 文 | 英文(English) |
英文摘要 | The use of elastic waves to measure elastic properties as well as flaws in solid specimens has received much attention, and many important applications have been developed recently. This paper summarizes some of the recent results in applying elastic waves to nondestructive evaluation (NDE) of isotropic as well as anisotropic materials. This paper is divided into four parts, the first part describes the theoretical background of surface waves in an anisotropic layered medium, where sextic formalism of surface waves is adopted. The second part introduces numerical simulations of 2-D and 3-D transient elastic waves propagating in plate structures that contain cracks and/or flaws. In the third part, some of the applications of laser generated surface waves used to determine anisotropic elastic constants and bonding conditions in layered media are described. In the last part, a newly developed method for determining concrete elastic constants and recently developed methods for detection of surface breaking cracks in concrete using transient elastic waves are described. |
本系統中英文摘要資訊取自各篇刊載內容。