Abstract The use of composites in industrial contexts is already established in recent years. In chemical and oil industries, one application of composite materials is to patch up metallic pipelines and pressure vessels with damages, increasing their lifespans. The damage extension after the repair procedure can be monitored using shearography combined with a loading method such as pressure (PLM), vibration (VLM), induction (ILM), and radiation (RLM). Since the choice of loading method depends on the application, this work proposes a theoretical and practical comparison of PLM, VLM, ILM, and RLM to unveil abnormalities in composite path-up repairs in damaged metallic parts using square-pulse shearography. The results indicate that PLM is the best method, with the lowest number of artifacts. VLM also provided good results and it is more feasible to employ than PLM. These results are important since they indicated more interesting loading procedures to be used with shearography in non-destructive testing techniques.

中文翻译：

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使用压力、辐射、振动和感应加载方法对用玻璃纤维增​​强聚合物修复的金属部件进行方脉冲剪切图检查

摘要 近年来，复合材料在工业环境中的应用已经确立。在化工和石油行业，复合材料的应用之一是修补损坏的金属管道和压力容器，延长其使用寿命。修复程序后的损伤扩展可以使用剪切成像结合加载方法进行监测，例如压力 (PLM)、振动 (VLM)、感应 (ILM) 和辐射 (RLM)。由于加载方法的选择取决于应用，这项工作提出了 PLM、VLM、ILM 和 RLM 的理论和实践比较，以使用方脉冲剪切成像揭示损坏金属部件复合材料路径修复中的异常。结果表明 PLM 是最好的方法，具有最少的工件数量。VLM 也提供了良好的效果，并且比 PLM 更易于使用。这些结果很重要，因为它们表明在非破坏性测试技术中与剪切成像一起使用的加载程序更有趣。