This paper presents an efficient numerical technique capable of handling the stress analysis of three-dimensional cracked bodies strengthened by adhesively bonded patches. The proposed technique is implemented within the framework of the coupling of the weakly singular boundary integral equation method and the standard finite element procedure. The former is applied to efficiently treat the elastic body containing cracks, whereas the latter is adopted to handle both the adhesive layers and patches. The approximation of the near-front relative crack-face displacement is enhanced by using local interpolation functions that can capture the right asymptotic behavior. This also offers the direct calculation of the stress intensity factors along the crack front. A selected set of results is reported to demonstrate the capability of the proposed technique and the influence of various parameters on the performance of the strengthening.

中文翻译：

---

使用 BEM-FEM 耦合的胶接补片加固裂纹体分析

本文提出了一种有效的数值技术，能够处理由粘合补片加固的三维裂纹体的应力分析。所提出的技术是在弱奇异边界积分方程法和标准有限元程序耦合的框架内实现的。前者用于有效处理含有裂纹的弹性体，而后者用于处理粘合剂层和贴片。通过使用可以捕捉正确渐近行为的局部插值函数，可以增强近前相对裂纹面位移的近似值。这也提供了沿裂纹前沿的应力强度因子的直接计算。