Effect of thermally induced strain on optical fiber sensors embedded in cement-based composites

Li bo Yuan, Li Min Zhou, Wei Jin, K. T. Lau, Chi kin Poon

Research output: Journal article publicationJournal articleAcademic researchpeer-review

7 Citations (Scopus)

Abstract

A critical issue in developing a fiber-optic strain gauge is its codependency on temperature and strain. Any changes in the output of the optical fiber sensor due to its own thermal sensitivity and the thermal expansion of the most material will be misinterpreted as a change in shape-induced strain in the structure. This codependence is often referred to as thermally induced apparent strain or simply apparent strain. In this paper, an analytical model was developed to evaluate the thermally induced strain in fiber optic sensors embedded in cement-based composites. The effects of thermal induced strain on embedded optical fiber were measured with a white-light fiber-optic Michelson sensing interferometer for a number of cement-based host materials.
Original languageEnglish
Pages (from-to)95-106
Number of pages12
JournalOptical Fiber Technology
Volume9
Issue number2
DOIs
Publication statusPublished - 1 Apr 2003

Keywords

  • Cement
  • Composite
  • Concrete
  • Fiber optic sensor
  • Strain
  • Thermal induced strain

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Signal Processing
  • Electrical and Electronic Engineering

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