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http://dx.doi.org/10.3795/KSME-A.2017.41.7.613

Residual Strain Characteristics of Nickel-coated FBG Sensors  

Cho, Won-Jae (Dept. of Mechanical Engineering, Hankyong Nat'l Univ.)
Hwang, A-Reum (Dept. of Mechanical Engineering, Hankyong Nat'l Univ.)
Kim, Sang-Woo (Dept. of Mechanical Engineering, Hankyong Nat'l Univ.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.41, no.7, 2017 , pp. 613-620 More about this Journal
Abstract
A metal-coated FBG (fiber Bragg grating) sensor has a memory effect, which can recall the maximum strains experienced by the structure. In this study, a nickel-coated FBG sensor was fabricated through electroless (i.e., chemical plating) and electroplating. A thickness of approximately $43{\mu}m$ of a nickel layer was achieved. Then, we conducted cyclic loading tests for the fabricated nickel-coated FBG sensors to verify their capability to produce residual strains. The results revealed that the residual strain induced by the nickel coating linearly increased with an increase in the maximum strain experienced by the sensor. Therefore, we verified that a nickel-coated FBG sensor has a memory effect. The fabrication methods and the results of the cycle loading test will provide basic information and guidelines in the design of a nickel-coated FBG sensor when it is applied in the development of structural health monitoring techniques.
Keywords
FBG; Memory Effect; Electroless Plating; Electroplating; Cycle Loading Test;
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