| Waves scattering induced by an interface crack in a coated material |
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| 作者姓名： | 常军 刘勇 许金泉 |
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| 作者单位： | School of Naval Architecture，Ocean and Civil Engineering，Shanghai Jiaotong University，Shanghai 200240，China，School of Naval Architecture，Ocean and Civil Engineering，Shanghai Jiaotong University，Shanghai 200240，China，School of Naval Architecture，Ocean and Civil Engineering，Shanghai Jiaotong University，Shanghai 200240，China |
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| 摘 要： | INTRODUCTION Cracks are likely to occur on the interfaces of coated materials widely applied in engineering. It is important to detect the interface cracks by non-destructive means. Detecting the scattered waves induced by interfacial cracks by using ultrasonic technique can be considered as one of the most fea- sible methods. This paper focuses on the theoretical basis for the study of wave scattering induced by interfacial cracks. In the last two decades, there has been a large number o…
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| 关 键 词： | 弹性波散射 分界面 断裂理论 涂层材料 边值问题 |
| 收稿时间： | 2005-03-01 |
| 修稿时间： | 2005-04-05 |
Waves scattering induced by an interface crack in a coated material |
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| Chang Jun,Liu Yong,Xu Jin-quan.Waves scattering induced by an interface crack in a coated material[J].Journal of Zhejiang University Science,2005,6(9):950-955. |
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| Authors: | Chang Jun Liu Yong Xu Jin-quan |
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| Institution: | (1) School of Naval Architecture, Ocean and Civil Engineering, Shanghai Jiaotong University, 200240 Shanghai, China |
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| Abstract: | This paper deals with the two-dimensional problem of elastic wave scattering from a finite crack at the interface between a coated material layer and its substrate. By adopting the Fourier transform method and introducing the crack opening displacement function, the boundary value problem is simplified for numerically solving a system of Cauchy-type singular integral equations by means of Jacobi polynomial expansion. The stress intensity factors and the crack opening displacements are defined in terms of the integral equations solutions. The influence of the dimensionless wave number and the ratio of crack length to layer thickness on the stress intensity factors and crack opening displacements are discussed. |
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| Keywords: | Wave scattering Interfacial crack Coated materials |
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