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Investigation of a coated optical fiber strain sensor embedded in a linear strain matrix material
Authors:Libo Yuan  Limin Zhou  Jingshen Wu
Institution:a Department of Physics, Harbin Engineering University, Harbin 150001, People's Republic of China;b Department of Mechanical Engineering, The Hong Kong Polytechnic University, Hong Kong;c Department of Mechanical Engineering, The Hong Kong University of Science and Technology, Hong Kong
Abstract:A theoretical model has been developed to study the mechanical behaviors of the interface between an embedded optical fiber with coating material and a linear strain matrix. The results show that the longitudinal stress and strain in the fiber optic sensor are different from that distributed in the host material and depend on the strain distribution and embedded length of the optical fiber as well as the material properties of the fiber coating. The distribution of interfacial shear strain between the coating and the glass fiber and the distribution of strain/stress of the glass fiber are given.
Keywords:Strain  Interfacial shear stress  Optical fiber  Composite materials  Smart structure
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