Use of Fiber Optic Sensors for Monitoring Crack Growth in Fatigue and Corrosion-Fatigue Tests

Andrea Brotzu; F. Felli; A. Paolozzi; L. Caputo; F. Passeggio; S. Gaeta

doi:10.4028/www.scientific.net/AMR.38.155

Paper Titles

A New Technique for Locating Coating Faults on Buried Metallic Pipelines
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Wireless Sensors with Advanced Detection and Prognostic Capabilities for Corrosion Health Management
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Water Distribution System Modeling and Remote Monitoring
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Acoustic Leak Survey of the Underground Potable Water System at a CONUS Army Installation
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Use of Fiber Optic Sensors for Monitoring Crack Growth in Fatigue and Corrosion-Fatigue Tests
p.155

Measuring Rates and Impact of Corrosion on DOD Equipment
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The Development of a Corrosion Prognostic Health Management System for Australian Defence Force Aircraft
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In Situ Lining of a Pre-Action Fire Suppression System to Prevent Pitting Corrosion of the Carrier Pipe
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Anodic Alumina Membranes as Template for the Synthesis of 1-D Metal Oxide and Hydroxide Nanostructures
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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 38Use of Fiber Optic Sensors for Monitoring Crack...

Use of Fiber Optic Sensors for Monitoring Crack Growth in Fatigue and Corrosion-Fatigue Tests

Abstract:

Fibre Bragg Gratings (FBGs) are optical strain gages manufactured directly inside the fiber core. They provide several advantages with respect to conventional strain gages. In particular it is possible to put several FBGs along the same fibre (multiplexing), they are immune to corrosive environments and to electromagnetic interferences. They can be embedded in almost all types of materials and are very useful in Structural Health Monitoring. An innovative approach for testing specimens in this area is reported in this work. An aluminium alloy 2024-T3 CT specimen has been manufactured with one small feed-through hole and a superficial groove. Two FBG sensors, multiplexed on the same fibre, have been glued one inside the hole and one inside the groove. Fatigue test has been carried out monitoring the crack length both with standard measure system and with the FBG strain sensors placed in front of the crack tip.