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Photogrammetric Process to Monitor Stress Fields Inside Structural Systems

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Department of Electrical Engineering, UFJF, Juiz de Fora 36036-900, MG, Brazil
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Department of Electronics, Federal Center for Technological Education of Rio de Janeiro, CEFET-RJ, Rio de Janeiro 20271-110, RJ, Brazil
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Faculty of Exact and Technological Sciences, UNEMAT, Sinop 78555-000, MT, Brazil
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Department of Civil Engineering, School of Mines, UFOP, Ouro Preto 35400-000, MG, Brazil
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Department of Structural Engineering, UFJF, Juiz de Fora 36036-900, MG, Brazil
*
Author to whom correspondence should be addressed.
Academic Editor: Mark Shortis
Sensors 2021, 21(12), 4023; https://doi.org/10.3390/s21124023
Received: 22 April 2021 / Revised: 4 June 2021 / Accepted: 6 June 2021 / Published: 10 June 2021
(This article belongs to the Section Intelligent Sensors)
This research employs displacement fields photogrammetrically captured on the surface of a solid or structure to estimate real-time stress distributions it undergoes during a given loading period. The displacement fields are determined based on a series of images taken from the solid surface while it experiences deformation. Image displacements are used to estimate the deformations in the plane of the beam surface, and Poisson’s Method is subsequently applied to reconstruct these surfaces, at a given time, by extracting triangular meshes from the corresponding points clouds. With the aid of the measured displacement fields, the Boundary Element Method (BEM) is considered to evaluate stress values throughout the solid. Herein, the unknown boundary forces must be additionally calculated. As the photogrammetrically reconstructed deformed surfaces may be defined by several million points, the boundary displacement values of boundary-element models having a convenient number of nodes are determined based on an optimized displacement surface that best fits the real measured data. The results showed the effectiveness and potential application of the proposed methodology in several tasks to determine real-time stress distributions in structures. View Full-Text
Keywords: photogrammetry; image displacement; point cloud; the Poisson’s method; displacement-surface fitting photogrammetry; image displacement; point cloud; the Poisson’s method; displacement-surface fitting
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MDPI and ACS Style

Honório, L.M.; Pinto, M.F.; Hillesheim, M.J.; de Araújo, F.C.; Santos, A.B.; Soares, D., Jr. Photogrammetric Process to Monitor Stress Fields Inside Structural Systems. Sensors 2021, 21, 4023. https://doi.org/10.3390/s21124023

AMA Style

Honório LM, Pinto MF, Hillesheim MJ, de Araújo FC, Santos AB, Soares D Jr.. Photogrammetric Process to Monitor Stress Fields Inside Structural Systems. Sensors. 2021; 21(12):4023. https://doi.org/10.3390/s21124023

Chicago/Turabian Style

Honório, Leonardo M.; Pinto, Milena F.; Hillesheim, Maicon J.; de Araújo, Francisco C.; Santos, Alexandre B.; Soares, Delfim, Jr. 2021. "Photogrammetric Process to Monitor Stress Fields Inside Structural Systems" Sensors 21, no. 12: 4023. https://doi.org/10.3390/s21124023

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