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Optical Engineering

Monitoring static shape memory polymers using a fiber Bragg grating as a vector-bending sensor
Author(s): Peng Li; Zhijun Yan; Kaiming Zhou; Lin Zhang; Jinsong Leng
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Paper Abstract

We propose and demonstrate a technique for monitoring the recovery deformation of the shape-memory polymers (SMP) using a surface-attached fiber Bragg grating (FBG) as a vector-bending sensor. The proposed sensing scheme could monitor the pure bending deformation for the SMP sample. When the SMP sample undergoes concave or convex bending, the resonance wavelength of the FBG will have red-shift or blue-shift according to the tensile or compressive stress gradient along the FBG. As the results show, the bending sensitivity is around 4.07  nm/cm −1 . The experimental results clearly indicate that the deformation of such an SMP sample can be effectively monitored by the attached FBG not just for the bending curvature but also the bending direction.

Paper Details

Date Published: 3 January 2013
PDF: 6 pages
Opt. Eng. 52(1) 014401 doi: 10.1117/1.OE.52.1.014401
Published in: Optical Engineering Volume 52, Issue 1
Show Author Affiliations
Peng Li, Harbin Institute of Technology (China)
Zhijun Yan, Aston Univ. (United Kingdom)
Kaiming Zhou, Aston Univ. (United Kingdom)
Lin Zhang, Aston Univ. (United Kingdom)
Jinsong Leng, Harbin Institute of Technology (China)

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