Measuring changing strain fields in composites with Distributed Fiber-Optic Sensing using the optical backscatter reflectometer

被引：69

作者：

Grave, Jon Harald L. ^{[1
]}

Haheim, Magnus L. ^{[1
]}

Echtermeyer, Andreas T. ^{[1
]}

机构：

[1] NTNU Dept Engn Design & Mat, NO-7491 Trondheim, Norway

来源：

COMPOSITES PART B-ENGINEERING | 2015年 / 74卷

关键词：

Debonding; Non-destructive testing; Joints; Distributed Fiber-Optic Sensing; STEEL; DESIGN;

D O I：

10.1016/j.compositesb.2015.01.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Background/purpose: Measurements of strains in critical components are often required in addition to finite element calculations when evaluating a structure. Methods: This paper describes how standard optical fibers, bonded to the surface or embedded in a laminate, can measure strain fields along the entire length of the fiber, using the optical backscatter reflectometer. Results: A strain field measurement can be much better compared to simulations than the more common single point measurements with strain gauges or Bragg Gratings. Changes of the strain field can be related to damage development and can be used for structural health monitoring. Practical aspects of using the fibers are also discussed. Conclusion: Distributed Fiber-Optic Sensing was successfully embedded and bonded to a composite joint. Adhesive damage was identified and the strain field agreed well with FE-Analysis. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：138 / 146

页数：9

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