In-situ strain measurements in composites during fatigue testing using optical fibre Bragg gratings and a portable CCD detection system

Tonguy Liu; Gerard F. Fernando; Yun-Jiang Rao; David A. Jackson; Lin Zhang; Ian Bennion

doi:10.1117/12.252137

In-situ strain measurements in composites during fatigue testing using optical fibre Bragg gratings and a portable CCD detection system

Tonguy Liu, Gerard F. Fernando, Yun-Jiang Rao, David A. Jackson, Lin Zhang, Ian Bennion

Aston Institute of Photonic Technologies (AiPT)

Research output: Chapter in Book/Published conference output › Conference publication

Abstract

An optical fibre Bragg grating (FBG) sensor was surface mounted onto a carbon fibre reinforced epoxy composite and subjected to static and dynamic loading. The FBG sensor was found to operate satisfactorily up to 700,000 cycles when the fatigue test was terminated. The fatigue test was conducted at a peak stress of 210 MPa and a stress ratio of -0.5. The FBG sensor was also found to operate satisfactorily over the cyclic loading frequency range of 0.1 - 6 Hz used in this study. The feasibility of using the sensor system for monitoring the stiffness ofthe composite during the fatigue test was demonstrated. The signal processing for the sensor system was based on a CCD spectrometer. The sensitivity of the static strain measurements was found to be approximately 80 jtc. A broadening ofthe FBG reflective spectrum was seen to develop as a function of fatigue cycles, and this phenomenon may be due to the delamination ofthe sensor from the surface ofthe composite.

Original language	English
Title of host publication	Fiber Optic Sensors V
Editors	Kim D. Bennett, Byoung Y. Kim, Yanbiao Liao
Publisher	SPIE
Pages	249-257
Number of pages	9
ISBN (Print)	978-0-8194-2296-5
DOIs	https://doi.org/10.1117/12.252137
Publication status	Published - 24 Sept 1996
Event	Fiber optic sensors V - Munich, Germany Duration: 22 Jun 1995 → 23 Jun 1995

Publication series

Name	SPIE Proceedings
Publisher	SPIE
Volume	2895
ISSN (Print)	0277-786X
ISSN (Electronic)	1996-756X

Conference

Conference	Fiber optic sensors V
Country/Territory	Germany
City	Munich
Period	22/06/95 → 23/06/95

Bibliographical note

Tonguy Liu ; Gerard F. Fernando ; Yun-Jiang Rao ; David A. Jackson ; Lin Zhang and Ian Bennion "In-situ strain measurements in composites during fatigue testing using optical fiber Bragg gratings and a portable CCD detection system", Proc. SPIE 2895, Fiber Optic Sensors V, 249 (September 24, 1996);

Copyright 1996 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.

http://dx.doi.org/10.1117/12.252137

Keywords

smart structures
optical Fiber sensors
fibre Bragg grating
strain
Fatigue damage
CCD
fiber composites

Access to Document

10.1117/12.252137

In-situ strain measurements in composites during fatigue testing using optical fibre Bragg gratings and a portable CCD detection system
Tonguy Liu ; Gerard F. Fernando ; Yun-Jiang Rao ; David A. Jackson ; Lin Zhang and Ian Bennion "In-situ strain measurements in composites during fatigue testing using optical fiber Bragg gratings and a portable CCD detection system", Proc. SPIE 2895, Fiber Optic Sensors V, 249 (September 24, 1996); Copyright 1996 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. http://dx.doi.org/10.1117/12.252137
Final published version, 273 KB

Cite this

Liu, T., Fernando, G. F., Rao, Y.-J., Jackson, D. A., Zhang, L., & Bennion, I. (1996). In-situ strain measurements in composites during fatigue testing using optical fibre Bragg gratings and a portable CCD detection system. In K. D. Bennett, B. Y. Kim, & Y. Liao (Eds.), Fiber Optic Sensors V (pp. 249-257). (SPIE Proceedings; Vol. 2895). SPIE. https://doi.org/10.1117/12.252137

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title = "In-situ strain measurements in composites during fatigue testing using optical fibre Bragg gratings and a portable CCD detection system",

abstract = "An optical fibre Bragg grating (FBG) sensor was surface mounted onto a carbon fibre reinforced epoxy composite and subjected to static and dynamic loading. The FBG sensor was found to operate satisfactorily up to 700,000 cycles when the fatigue test was terminated. The fatigue test was conducted at a peak stress of 210 MPa and a stress ratio of -0.5. The FBG sensor was also found to operate satisfactorily over the cyclic loading frequency range of 0.1 - 6 Hz used in this study. The feasibility of using the sensor system for monitoring the stiffness ofthe composite during the fatigue test was demonstrated. The signal processing for the sensor system was based on a CCD spectrometer. The sensitivity of the static strain measurements was found to be approximately 80 jtc. A broadening ofthe FBG reflective spectrum was seen to develop as a function of fatigue cycles, and this phenomenon may be due to the delamination ofthe sensor from the surface ofthe composite.",

keywords = "smart structures, optical Fiber sensors, fibre Bragg grating, strain, Fatigue damage, CCD, fiber composites",

author = "Tonguy Liu and Fernando, {Gerard F.} and Yun-Jiang Rao and Jackson, {David A.} and Lin Zhang and Ian Bennion",

note = "Tonguy Liu ; Gerard F. Fernando ; Yun-Jiang Rao ; David A. Jackson ; Lin Zhang and Ian Bennion {"}In-situ strain measurements in composites during fatigue testing using optical fiber Bragg gratings and a portable CCD detection system{"}, Proc. SPIE 2895, Fiber Optic Sensors V, 249 (September 24, 1996); Copyright 1996 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. http://dx.doi.org/10.1117/12.252137; Fiber optic sensors V ; Conference date: 22-06-1995 Through 23-06-1995",

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doi = "10.1117/12.252137",

language = "English",

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address = "United States",

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Liu, T, Fernando, GF, Rao, Y-J, Jackson, DA, Zhang, L & Bennion, I 1996, In-situ strain measurements in composites during fatigue testing using optical fibre Bragg gratings and a portable CCD detection system. in KD Bennett, BY Kim & Y Liao (eds), Fiber Optic Sensors V. SPIE Proceedings, vol. 2895, SPIE, pp. 249-257, Fiber optic sensors V, Munich, Germany, 22/06/95. https://doi.org/10.1117/12.252137

In-situ strain measurements in composites during fatigue testing using optical fibre Bragg gratings and a portable CCD detection system. / Liu, Tonguy; Fernando, Gerard F.; Rao, Yun-Jiang et al.
Fiber Optic Sensors V. ed. / Kim D. Bennett; Byoung Y. Kim; Yanbiao Liao. SPIE, 1996. p. 249-257 (SPIE Proceedings; Vol. 2895).

Research output: Chapter in Book/Published conference output › Conference publication

TY - GEN

T1 - In-situ strain measurements in composites during fatigue testing using optical fibre Bragg gratings and a portable CCD detection system

AU - Liu, Tonguy

AU - Fernando, Gerard F.

AU - Rao, Yun-Jiang

AU - Jackson, David A.

AU - Zhang, Lin

AU - Bennion, Ian

N1 - Tonguy Liu ; Gerard F. Fernando ; Yun-Jiang Rao ; David A. Jackson ; Lin Zhang and Ian Bennion "In-situ strain measurements in composites during fatigue testing using optical fiber Bragg gratings and a portable CCD detection system", Proc. SPIE 2895, Fiber Optic Sensors V, 249 (September 24, 1996); Copyright 1996 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited. http://dx.doi.org/10.1117/12.252137

PY - 1996/9/24

Y1 - 1996/9/24

N2 - An optical fibre Bragg grating (FBG) sensor was surface mounted onto a carbon fibre reinforced epoxy composite and subjected to static and dynamic loading. The FBG sensor was found to operate satisfactorily up to 700,000 cycles when the fatigue test was terminated. The fatigue test was conducted at a peak stress of 210 MPa and a stress ratio of -0.5. The FBG sensor was also found to operate satisfactorily over the cyclic loading frequency range of 0.1 - 6 Hz used in this study. The feasibility of using the sensor system for monitoring the stiffness ofthe composite during the fatigue test was demonstrated. The signal processing for the sensor system was based on a CCD spectrometer. The sensitivity of the static strain measurements was found to be approximately 80 jtc. A broadening ofthe FBG reflective spectrum was seen to develop as a function of fatigue cycles, and this phenomenon may be due to the delamination ofthe sensor from the surface ofthe composite.

AB - An optical fibre Bragg grating (FBG) sensor was surface mounted onto a carbon fibre reinforced epoxy composite and subjected to static and dynamic loading. The FBG sensor was found to operate satisfactorily up to 700,000 cycles when the fatigue test was terminated. The fatigue test was conducted at a peak stress of 210 MPa and a stress ratio of -0.5. The FBG sensor was also found to operate satisfactorily over the cyclic loading frequency range of 0.1 - 6 Hz used in this study. The feasibility of using the sensor system for monitoring the stiffness ofthe composite during the fatigue test was demonstrated. The signal processing for the sensor system was based on a CCD spectrometer. The sensitivity of the static strain measurements was found to be approximately 80 jtc. A broadening ofthe FBG reflective spectrum was seen to develop as a function of fatigue cycles, and this phenomenon may be due to the delamination ofthe sensor from the surface ofthe composite.

KW - smart structures

KW - optical Fiber sensors

KW - fibre Bragg grating

KW - strain

KW - Fatigue damage

KW - CCD

KW - fiber composites

UR - http://proceedings.spiedigitallibrary.org/proceeding.aspx?articleid=1024609

U2 - 10.1117/12.252137

DO - 10.1117/12.252137

M3 - Conference publication

SN - 978-0-8194-2296-5

T3 - SPIE Proceedings

SP - 249

EP - 257

BT - Fiber Optic Sensors V

A2 - Bennett, Kim D.

A2 - Kim, Byoung Y.

A2 - Liao, Yanbiao

PB - SPIE

T2 - Fiber optic sensors V

Y2 - 22 June 1995 through 23 June 1995

ER -

In-situ strain measurements in composites during fatigue testing using optical fibre Bragg gratings and a portable CCD detection system

Abstract

Publication series

Conference

Bibliographical note

Keywords

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