Evaluation of bending strain measurements in a composite sailboat bowsprit with embedded fibre Bragg gratings |
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| Affiliation: | 1. School of Electrical and Automation Engineering, Hefei University of Technology, Hefei 230009, PR China;2. School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, PR China;1. Department of Production Technology, MIT Campus, Chromepet, Anna University, Chennai, Tamil Nadu 600044, India;2. Department of Mechanical Engineering, CEG Campus, Guindy, Anna University, Chennai, Tamil Nadu 600025, India;1. State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan, Hubei 430079, China;2. Shenzhen Key Laboratory of Spatial-temporal Smart Sensing and Services, Shenzhen University, Shenzhen, Guangdong 518052, China;3. School of Geodesy and Geodetics, Wuhan University, Wuhan, Hubei 430079, China |
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| Abstract: | Acrylate-coated Fibre Bragg Gratings (FBGs) were embedded in a sailing boat bowsprit tubular section manufactured using the vacuum bagging process in autoclave with the aim of measuring strains under realistic loading conditions. In order to establish an effective procedure for sensor integration, flat tensile specimens with embedded sensors were firstly produced under different processing conditions, using advanced composite material employed in the marine industry. Information obtained in this way was used to manufacture a sailboat bowsprit with an array of gratings embedded between the last inner plies. In order to assess the sensitivity and accuracy of the embedded sensors, the bowsprit was subjected to bending tests and the results were compared to analytical values and to data obtained from electrical strain gages. Results are very encouraging but reveal that great attention must be paid both to the integration process and to the in situ calibration of the embedded sensors. |
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| Keywords: | Fibre Bragg Gratings (FBGs) Embedded sensors Strain measurement Marine composite structures Autoclave curing |
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