Abstract
Shearography is a non-destructive testing technique that provides full-field surface strain characterization. Previous inspection of flat objects or simple geometric shapes has been reported. However, real-life objects especially in aerospace, transport, or cultural heritage are not flat, but their inspection with shearography is of interest for both hidden defect detection and material characterization. Accurate strain measurement of a highly curved or free-form surface needs to be performed by combining in-line object shape measuring and processing of the shearography data in 3D. Previous research has not provided a general solution for that. This paper presents a new approach of 3D shape shearography which is based on the integration of a structured light projector for in-line shape measuring with 3D shearography. For the experimental part, a 3D shape shearography system prototype was developed and its performance was evaluated with a cylinder specimen loaded by internal pressure and compared with strain gauges.
© 2019 Optical Society of America
Full Article | PDF ArticleMore Like This
Antonio de Jesús Ortiz-González, Amalia Martínez-García, Juan Benito Pascual-Francisco, Juan Antonio Rayas-Álvarez, and Alexis de Jesús Flores-García
Appl. Opt. 60(5) 1349-1356 (2021)
Qihan Zhao, Weijie Chen, Fangyuan Sun, PeiZheng Yan, Bing Ye, and Yonghong Wang
Appl. Opt. 58(31) 8665-8672 (2019)
Shengjia Wang, Jie Dong, Franziska Pöller, Xingchen Dong, Min Lu, Laura M. Bilgeri, Martin Jakobi, Félix Salazar-Bloise, and Alexander W. Koch
Appl. Opt. 58(3) 593-603 (2019)