Evaluating damage in smart composite laminates using embedded EFPI strain sensors

被引：0
|
作者：
Zhou, G. [1 ]
Sim, L. M. [2 ]
机构：
[1] Univ Loughborough, Dept Aeronaut & Automot Engn, Loughborough LE11 3TU, Leics, England
[2] Singapore Inst Mfg Technol, Singapore 638075, Singapore
来源：
INTERNATIONAL CONFERENCE ON SMART MATERIALS AND NANOTECHNOLOGY IN ENGINEERING, PTS 1-3 | 2007年 / 6423卷
关键词：
EFPI strain sensor; damage evaluation; smart composite structure;
D O I：
10.1117/12.779392
中图分类号：
V [航空、航天];
学科分类号：
08 ; 0825 ;
摘要：
Extrinsic Fabry-Perot interferometric strain sensors were assessed for their sensing capacity and survivability via the surface mounting and die interior embedment in the carbon/epoxy beams. Artificial delaminations of two different sizes were used to simulate delamination. The embedded EFPI-SSs along with surface-mounted SGs were used to evaluate the effect of the delaminations on bending stiffness induced by quasi-static loading on a comparative basis. The response of EFPI-SSs was shown to be linear up to a bending strain of 0.5% and was in good agreement with the interpolated strains of surface strain measurements. The embedded EFPI-SSs were able to differentiate the effect of the tensile delaminations on bending stiffness. The interior strain data from embedded EFPI-SSs were shown to be very useful to extrapolate the strain difference on both sides of the delaminations as well as deducing local stresses.
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页数：8
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