期刊
OPTICS AND LASERS IN ENGINEERING
卷 151, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.optlaseng.2021.106842
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This paper presents the advantages of using Digital Image Correlation (DIC) in the field of structural health monitoring and proposes a specific DIC technique. By training, a reduced kinematic basis and amplitude distribution can be determined, and non-iterative processing is achieved using filtering and extractors.
In the field of structural health monitoring, the use of Digital Image Correlation (DIC) on relevant surfaces offers remarkable advantages. Such a method is presented herein. The statistically stationary nature of usual loads makes it possible to determine, by training with DIC, a reduced kinematic basis (composed of modes) and a statistical amplitude distribution for each mode. Further, a specific DIC technique is proposed to deal with such particular kinematics by introducing an extractor per mode that operates on images after a filtering step. This per-mode DIC measurement reduces to a simple scalar product between the image and the corresponding extractor, which allows for very fast and non-iterative processing. As an illustration, this methodology is deployed on a test case of fatigue crack propagation.
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