2026-04-19T07:37:57Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/92522024-06-13T00:05:28Zcom_10259_4809com_10259_5086com_10259_2604col_10259_4810

Mena Alonso, Álvaro 721 600 0000-0002-4269-5299 Latorre Carmona, Pedro 815 600 0000-0001-6984-5173 González Cabrera, Dorys Carmen 246 600 0000-0001-8740-120X Diez Pastor, José Francisco 156 600 0000-0001-5013-7505 Rodríguez Diez, Juan José 477 600 0000-0002-3291-2739 Mínguez Algarra, Jesús 369 600 0000-0003-0569-5131 Vicente Cabrera, Miguel Ángel 574 600 0000-0002-9425-6087 2024-06-12T12:42:48Z 2024-06-12T12:42:48Z 2023-07-09 1644-9665 http://hdl.handle.net/10259/9252 10.1007/s43452-023-00723-6 1644-9665 This paper shows a new low-cost technology for the measurement of crack propagation in quasi-fragile materials based on a stereo pair of cameras and LED light spots. The two cameras record the displacement experienced by a series of LED white lights. For each frame, the X, Y and Z 3D coordinates of all the centroids of the LED points are obtained. From this information, it is possible to determine the variation of the distance between any two of them. In this case, 2 strips of 12 LED lights each were arranged in such a way that the points of both strips coincided in pairs in height. The algorithm made it possible to monitor the increase in distance that occurred between each pair of lights at the same height. The paper shows the mathematical basis of this technological solution. A test has been carried out by installing this system in a concrete cube 150 mm side and subjected to a wedge-splitting test. The results show that it is possible to monitor the crack propagation (position of the crack front) during the test and to know the crack width too. At present, the accuracy of this technique is only limited by the camera resolution and the computer processing capability. Open Access funding provided thanks to the CRUE-CSIC agreement with Springer Nature. The authors are grateful for financial support from the Ministerio de Economía y Competitividad, Spain, with grant no. PID2019-110928RB-C32, the Ministerio de Ciencia e Innovación, project PID2020-119894GB-I0, and the Junta de Castilla y León project BU055P20; co-financed through European Union FEDER funds. application/pdf eng Springer Nature Archives of Civil and Mechanical Engineering. 2023, V. 23, n. 3 https://doi.org/10.1007/s43452-023-00723-6 Atribución 4.0 Internacional http://creativecommons.org/licenses/by/4.0/ info:eu-repo/semantics/openAccess 3D stereo system Crack propagation Steel fibre-reinforced concrete LED lights Ingeniería civil Civil engineering Tecnología Technology Materiales de construcción Building materials Ingeniería mecánica Mechanical engineering A cost-effective stereo camera-based system for measuring crack propagation in fibre-reinforced concrete info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Archives of Civil and Mechanical Engineering 23 3 THUMBNAIL Mena-acme_2023.pdf.jpg Mena-acme_2023.pdf.jpg IM Thumbnail image/jpeg 4659 https://riubu.ubu.es/bitstream/10259/9252/4/Mena-acme_2023.pdf.jpg f9d49e31f8690daa21c4117db0513299 MD5 4 LICENSE license.txt license.txt text/plain; charset=utf-8 999 https://riubu.ubu.es/bitstream/10259/9252/3/license.txt b295bcbce42e2caabeb0c623d3860c06 MD5 3 CC-LICENSE license_rdf license_rdf application/rdf+xml; charset=utf-8 908 https://riubu.ubu.es/bitstream/10259/9252/2/license_rdf 0175ea4a2d4caec4bbcc37e300941108 MD5 2 ORIGINAL Mena-acme_2023.pdf Mena-acme_2023.pdf application/pdf 1894913 https://riubu.ubu.es/bitstream/10259/9252/1/Mena-acme_2023.pdf 43f2cbef520d5ce53e177c7577a691bb MD5 1 10259/9252 oai:riubu.ubu.es:10259/9252 2024-06-13 02:05:28.835 Repositorio Institucional de la Universidad de Burgos bubrep@ubu.es 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