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.

引用

页数：8

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