On the improvement of strain measurements with FBG sensors embedded in unidirectional composites

被引：34

作者：

Pereira, G. ^{[1
]}

Frias, C. ^{[1
]}

Faria, H. ^{[1
]}

Frazao, O. ^{[2
]}

Marques, A. T. ^{[3
]}

机构：

[1] INEGI Inst Engn Mecan & Gestao Ind, P-4200465 Oporto, Portugal

[2] INESC Porto Inst Engn Sistemas & Computadores Por, P-4150179 Oporto, Portugal

[3] Univ Porto, FEUP Fac Engn, P-4200465 Oporto, Portugal

来源：

POLYMER TESTING | 2013年 / 32卷 / 01期

关键词：

Smart materials; Optical fibre Bragg Grating sensors; Non-destructive testing; Structural health monitoring; BRAGG GRATING SENSORS; PRESSURE;

D O I：

10.1016/j.polymertesting.2012.09.010

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Optical fibre Bragg grating (FBG) sensors are now quite established and widely used in strain measurements of composites. However, insufficient understanding of the limitations of the embedment and measuring techniques often lead to inaccurate and inconclusive results. In this study, a novel method to improve the reliability and accuracy of the strain measurements on unidirectional composites using embedded FBG sensors was successfully developed. Using a carbon/epoxy prepreg system, test specimens were manufactured with longitudinally embedded FBG sensors. The combined behaviour of the sensors and the host material was characterized and a calibration rule (correction factor) was determined for the chosen material. The consistency of the results with both theoretical and empirical assumptions suggests that the proposed method is applicable to a wide range of FBG sensors and host materials. (c) 2012 Elsevier Ltd. All rights reserved.

引用

页码：99 / 105

页数：7

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