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Proceedings Paper

Monitoring of internal residual strain changes in CFRP using FBG sensors
Author(s): Shin-ichi Takeda; Jun Koyanagi; Shin Utsunomiya; Yuto Kinoshita; Yoshihiko Arao; Hiroyuki Kawada
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Paper Abstract

FBG (Fiber Bragg Grating) sensors were embedded into CFRP unidirectional composite laminates in a direction perpendicular to the carbon fiber. Residual strains after curing were evaluated by the reflection spectrum from the FBGs. The CFRP laminates were kept at 100°C for monitoring of the residual strain change measured by the FBGs. Without mechanical loading, occurrence of physical aging was confirmed by the residual strain changes. The relationship between the influence of physical aging on residual strain and the thickness of the CFRP was almost linear.

Paper Details

Date Published: 14 April 2010
PDF: 7 pages
Proc. SPIE 7522, Fourth International Conference on Experimental Mechanics, 75223N (14 April 2010); doi: 10.1117/12.851692
Show Author Affiliations
Shin-ichi Takeda, Japan Aerospace Exploration Agency (Japan)
Jun Koyanagi, Japan Aerospace Exploration Agency (Japan)
Shin Utsunomiya, Japan Aerospace Exploration Agency (Japan)
Yuto Kinoshita, Waseda Univ. (Japan)
Yoshihiko Arao, Waseda Univ. (Japan)
Hiroyuki Kawada, Waseda Univ. (Japan)

Published in SPIE Proceedings Vol. 7522:
Fourth International Conference on Experimental Mechanics
Chenggen Quan; Kemao Qian; Anand Krishna Asundi; Fook Siong Chau, Editor(s)

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