横观各向同性空间中半无限平面裂纹的衍射系数
Diffraction coefficients of a semi-infinite planar crack embedded in a transversely-isotropic space
摘要：
本文考虑了横观各向同性介质中的半无限裂纹，研究了两种特殊情况，一种是对称轴垂直于裂纹面，波的入射是任意的，另一种是对称轴垂直于裂纹面的边缘，入射波矢也垂直于裂纹面的边缘。这个问题是感兴趣的非破坏性评估，因为奥氏体钢，发现在包壳和其他焊缝的核反应堆中，通常被建模为横向各向同性。在这两种情况下，我们都以封闭形式表示了散射场并计算了相应的衍射系数。
英文摘要：
We have considered a semi-infinite crack embedded in a transversely isotropic medium and studied two special cases, one, in which the axis of symmetry is normal to the crack face and the wave incidence is arbitrary and another, in which the axis lies in the crack plane normal to the edge and the incident wave vector is also normal to the edge. The problem is of interest in Non-Destructive Evaluation, because austenitic steels that are found in claddings and other welds in the nuclear reactors are often modeled as transversely isotropic. In both of cases, we have expressed the scattered field in a closed form and computed the corresponding diffraction coefficients.
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