Scattering of SH waves by flaws in sandwich plates and its use in flaw detection
Scattering of SH waves by flaws in sandwich plates and its use in flaw detection
复制标题
夹层板缺陷对SH波的散射及其在探伤中的应用
DOI：
10.1016/0263-8223(95)00143-3
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发表时间：
1996
影响因子：
6.3
通讯作者：
K. Lam
中科院分区：
文献类型：
--
作者：
Guirong Liu;K. Lam
采用条元法研究了夹层板中矩形缺陷对SH波的散射。包含缺陷的板被分成应用SEM的域的结。对于每个域，反平面运动的SEM方程推导。这些方程给出了垂直边界上的牵引力和位移矢量之间的关系。然后，通过组合所有域的SEM方程，获得一组给出接头上牵引力和位移矢量之间关系的方程。这组方程是通过使用的结的条件来解决。计算了含矩形缺陷夹层板的频域SH波散射场，并与相应的无缺陷夹层板的结果进行了比较。本文还提出了一种确定夹层板中矩形裂纹长度和损伤因子的方法。
The strip element method (SEM) is used to investigate SH wave scattering by rectangular flaws in sandwich plates. The plates containing flaws are divided by junctions into domains in which the SEM is applied. For each domain, SEM equations for anti-plane motion are derived. These equations give a relationship between the traction and displacement vector on the vertical boundaries. A set of equations which give a relationship between the traction and displacement vector on the junctions is then obtained by assembling the SEM equations for all the domains. This set of equations is solved by using the conditions on the junctions. Scattered SH wave fields in the frequency domain for sandwich plates with rectangular flaws are computed and discussed in comparison with results for corresponding plates without flaws. A technique for determining the length and the damage factor of a rectangular flaw in a sandwich plate is also presented.