1 April 2015 Fibre optic sensors for load-displacement measurements and comparisons to piezo sensor based electromechanical admittance signatures
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Abstract
Structural health monitoring techniques using smart materials are on rise to meet the ever ending demand due to increased construction and manufacturing activities worldwide. The civil-structural components such as slabs, beams and columns and aero-components such as wings are constantly subjected to some or the other forms of external loading. This article thus focuses on condition monitoring due to loading/unloading cycle for a simply supported aluminum beam using multiple smart materials. On the specimen, fibre optic polarimetric sensor (FOPS) and fibre Bragg grating (FBG) sensors were glued. Piezoelectric wafer active sensor (PWAS) was also bonded at the centre of the specimen. FOPS and FBG provided the global and local strain measurements respectively whereas, PWAS predicted boundary condition variations by electromechanical admittance signatures. Thus these multiple smart materials together successfully assessed the condition of structure for loading and unloading tests.
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Muneesh Maheshwari, Muneesh Maheshwari, Venu Gopal Madhav Annamdas, Venu Gopal Madhav Annamdas, John Hock Lye Pang, John Hock Lye Pang, Swee Chuan Tjin, Swee Chuan Tjin, Anand Asundi, Anand Asundi, } "Fibre optic sensors for load-displacement measurements and comparisons to piezo sensor based electromechanical admittance signatures", Proc. SPIE 9437, Structural Health Monitoring and Inspection of Advanced Materials, Aerospace, and Civil Infrastructure 2015, 94370V (1 April 2015); doi: 10.1117/12.2084039; https://doi.org/10.1117/12.2084039
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