caa a22 4500 606244042 CHVBK 20210128101328.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s12596-015-0308-z doi (NATIONALLICENCE)springer-10.1007/s12596-015-0308-z FIBER Bragg Grating (FBG) sensor for estimation of Crack Mouth Opening Displacement (CMOD) in concrete [Elektronische Daten] [K. Samrajyam, R. Sai Prasad, T. Gunneswara Rao, B. Sobha] Crack mouth opening displacement (CMOD) is one of the important parameters for characterizing the fracture properties in concrete. Amongst various optical fiber senors, Fiber Bragg gratings are (FBG) being used for structural health monitoring in the recent times. Very few reports exist in literature for use of CMOD estimation using FBG sensors. We report here, the use of FBG based sensor for the estimation of CMOD in plain concrete beams prepared as per recommendations of Reunion Internationale des Laboratoires et Experts des Materiaux, Systems de Construction et Ouvrages (RILEM) and subjected to three point bend test in a digitally controlled Universal Testing Machine (UTM). The results are compared with Linear Variable Differential Transformer (LVDT) and a good agreement is found. The FBG sensor's resolution is better than LVDT beyond the peak stress. The Optical Society of India, 2015 Crack mouth opening displacement (CMOD) nationallicence Fiber Bragg grating (FBG) nationallicence Plain concrete nationallicence Three point bend test nationallicence Linear variable differential transformer (LVDT) nationallicence Samrajyam K. Department of Physics, National Institute of Technology, 506004, Warangal, India aut Sai Prasad R. Department of Physics, National Institute of Technology, 506004, Warangal, India aut Gunneswara Rao T. Department of Civil Engineering, National Institute of Technology, Warangal, India aut Sobha B. Department of Physics, National Institute of Technology, 506004, Warangal, India aut Journal of Optics Springer India 44/4(2015-12-01), 346-352 0972-8821 44:4<346 2015 44 12596 https://doi.org/10.1007/s12596-015-0308-z text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s12596-015-0308-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Samrajyam K. Department of Physics, National Institute of Technology, 506004, Warangal, India aut NATIONALLICENCE 700 1- Sai Prasad R. Department of Physics, National Institute of Technology, 506004, Warangal, India aut NATIONALLICENCE 700 1- Gunneswara Rao T. Department of Civil Engineering, National Institute of Technology, Warangal, India aut NATIONALLICENCE 700 1- Sobha B. Department of Physics, National Institute of Technology, 506004, Warangal, India aut NATIONALLICENCE 773 0- Journal of Optics Springer India 44/4(2015-12-01), 346-352 0972-8821 44:4<346 2015 44 12596