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Title: | An Image-Based Framework for Measuring the Prestress Level in CFRP Laminates: Experimental Validation | Authors: | Valença, Jónatas Ferreira, Cláudia Araújo, André G. Júlio, Eduardo |
Keywords: | machine learning; deep learning; computer vision; CFRP laminates; strengthening RC; strain monitoring | Issue Date: | 22-Feb-2023 | Publisher: | MDPI | Project: | European Regional Development Fund (ERDF), through the partnership agreement Portugal2020–Lisboa Operational Programme (LISBOA2020), under the project LISBOA-01-0247-FEDER-033948 STRAIN-VISION–Strain monitoring on pre-stressed CFRP laminates for reinforcement of concrete members using computer vision FCT - CEECIND/04463/2017 |
Serial title, monograph or event: | Materials | Volume: | 16 | Issue: | 5 | Abstract: | Image-based methods have been applied to support structural monitoring, product and material testing, and quality control. Lately, deep learning for compute vision is the trend, requiring large and labelled datasets for training and validation, which is often difficult to obtain. The use of synthetic datasets is often applying for data augmentation in different fields. An architecture based on computer vision was proposed to measure strain during prestressing in CFRP laminates. The contact-free architecture was fed by synthetic image datasets and benchmarked for machine learning and deep learning algorithms. The use of these data for monitoring real applications will contribute towards spreading the new monitoring approach, increasing the quality control of the material and application procedure, as well as structural safety. In this paper, the best architecture was validated during experimental tests, to evaluate the performance in real applications from pre-trained synthetic data. The results demonstrate that the architecture implemented enables estimating intermediate strain values, i.e., within the range of training dataset values, but it does not allow for estimating strain values outside those range. The architecture allowed for estimating the strain in real images with an error ∼0.5%, higher than that obtained with synthetic images. Finally, it was not possible to estimate the strain in real cases from the training performed with the synthetic dataset. | URI: | https://hdl.handle.net/10316/113805 | ISSN: | 1996-1944 | DOI: | 10.3390/ma16051813 | Rights: | openAccess |
Appears in Collections: | I&D ISR - Artigos em Revistas Internacionais |
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An-ImageBased-Framework-for-Measuring-the-Prestress-Level-in-CFRP-Laminates-Experimental-ValidationMaterials.pdf | 19.87 MB | Adobe PDF | View/Open |
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