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

Ji-long Li; Zhi Zhou; Jin-ping Ou

doi:10.1117/12.600678

17 May 2005 Interface transferring mechanism and error modification of embedded FBG strain sensor based on creep: Part I. linear viscoelasticity

Ji-long Li, Zhi Zhou, Jin-ping Ou

Author Affiliations +

Proceedings Volume 5765, Smart Structures and Materials 2005: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems; (2005) https://doi.org/10.1117/12.600678
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2005, San Diego, California, United States

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.

Citation Download Citation

Ji-long Li, Zhi Zhou, and Jin-ping Ou "Interface transferring mechanism and error modification of embedded FBG strain sensor based on creep: Part I. linear viscoelasticity", Proc. SPIE 5765, Smart Structures and Materials 2005: Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems, (17 May 2005); https://doi.org/10.1117/12.600678

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