Fiber Bragg Sensors Embedded in Cast Aluminum Parts: Axial Strain and Temperature Response

被引:14
作者
Lindner, Markus [1 ]
Stadler, Andrea [1 ]
Hamann, Georg [1 ]
Fischer, Bennet [1 ,2 ]
Jakobi, Martin [3 ]
Heilmeier, Florian [4 ]
Bauer, Constantin [4 ]
Volk, Wolfram [4 ]
Koch, Alexander W. [3 ]
Roths, Johannes [1 ]
机构
[1] Munich Univ Appl Sci, Photon Lab, Lothstr 34, D-80335 Munich, Germany
[2] Ctr Energie Mat Telecommun, Inst Natl Rech Sci INRS, 1650 Blvd Lionel Boulet, Varennes, PQ J3X 1S2, Canada
[3] Tech Univ Munich TUM, Inst Measurement Syst & Sensor Technol MST, Arcisstr 21, D-80333 Munich, Germany
[4] Tech Univ Munich TUM, Chair Met Forming & Casting UTG, Walther Meissner Str 4, D-85748 Garching, Germany
关键词
fiber Bragg grating; regenerated fiber Bragg grating; embedded fiber Bragg grating; casting; temperature response; strain response; tensile testing; OPTICAL-FIBER; COMPOSITE STRUCTURES; GRATING SENSORS; BEHAVIOR;
D O I
10.3390/s21051680
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
In this study, the response of fiber Bragg gratings (FBGs) embedded in cast aluminum parts under thermal and mechanical load were investigated. Several types of FBGs in different types of fibers were used in order to verify general applicability. To monitor a temperature-induced strain, an embedded regenerated FBG (RFBG) in a cast part was placed in a climatic chamber and heated up to 120 circle C within several cycles. The results show good agreement with a theoretical model, which consists of a shrink-fit model and temperature-dependent material parameters. Several cast parts with different types of FBGs were machined into tensile test specimens and tensile tests were executed. For the tensile tests, a cyclic procedure was chosen, which allowed us to distinguish between the elastic and plastic deformation of the specimen. An analytical model, which described the elastic part of the tensile test, was introduced and showed good agreement with the measurements. Embedded FBGs - integrated during the casting process - showed under all mechanical and thermal load conditions no hysteresis, a reproducible sensor response, and a high reliable operation, which is very important to create metallic smart structures and packaged fiber optic sensors for harsh environments.
引用
收藏
页码:1 / 19
页数:19
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