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Proceedings Paper

Interface transferring mechanism and error modification of embedded FBG strain sensor based on creep: Part I. linear viscoelasticity
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Paper Abstract

As strain-sensing elements in the structural health monitoring, the research and application of the Fiber-optic Bragg Grating sensor (FBG) has been widely accepted. Although there are some significant achievements on the interface transferring mechanism and error modification of FBG, the theoretical research on the creep behavior of FBG sensors is rarely taken into account. Because the optical fiber and adhesive is macromolecular polymer, when loaded in long term or high temperature, the creep characteristic of these material is emerging which influences the accuracy of FBG sensors. This paper presents the theoretical part on creep behavior of FBG sensors. Firstly, based on the linear viscoelastic constitutive relations, the general expression of multiplayer interface strain transferring mechanism is derived, and the error modified equation of FBG sensors is obtained. Secondly, the transient and steady-state responses of FBG sensors are presented. Finally, the elasticity-viscoelasticity corresponding principle is proposed, which is used for solving a class of interface strain transferring linear viscoelastic problem.

Paper Details

Date Published: 17 May 2005
PDF: 12 pages
Proc. SPIE 5765, Smart Structures and Materials 2005: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems, (17 May 2005); doi: 10.1117/12.600678
Show Author Affiliations
Ji-long Li, Harbin Institute of Technology (China)
Zhi Zhou, Harbin Institute of Technology (China)
Jin-ping Ou, Harbin Institute of Technology (China)


Published in SPIE Proceedings Vol. 5765:
Smart Structures and Materials 2005: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems
Masayoshi Tomizuka, Editor(s)

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