Monitoring High Temperature Steam Pipes Using Optical Strain Measurement Techniques

Andrew Morris; John P. Dear; Miltiadis Kourmpetis

doi:10.4028/www.scientific.net/AMM.5-6.145

Paper Titles

Characterization of Material Properties Using an Inverse Method
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Stress Analysis in Automobile Components Using Reflexive Photoelasticity Technique
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Optimization of the Unnotched Iosipescu Test on Composites for Identification from Full-Field Measurements
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Flexural Testing of Composite Sandwich Structures with Digital Speckle Photogrammetry
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Monitoring High Temperature Steam Pipes Using Optical Strain Measurement Techniques
p.145

On the Applicability of the Loading Parameter Φ in Pinned Connections with Relevant Initial Clearance
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Towards the Modelling of Fretting Wear and Fatigue Interaction in Spline Couplings
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Effect of Contact Interaction on the Stress Intensity Factors for a Crack under Harmonic Loading
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Mode I and Mode II Fracture Toughness Testing for a Coarse Grain Marble
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Monitoring High Temperature Steam Pipes Using Optical Strain Measurement Techniques

Abstract:

Optical strain measurement techniques have been extensively developed in recent years in order to cope in various environments. Power stations and wind turbine blades can provide challenging environments for the use of a measurement technique. There are, however, many installation problems to be overcome. For example, there is the need to have regard for the hostile environment in steam generating plant and the demanding conditions to which wind turbine blades are subjected. Ideally the outputs from individual sensors would be used for continuous remote monitoring. However, measurements can also be useful each time the plant is shut down during a plant outage; which would be used to complement data from existing proven rugged monitoring methods. This paper addresses the monitoring of pressurized steam pipes as to their micro-strain growth related to time in service. This paper presents the progress made in the developing of a ruggedised digital speckle ‘sensor’ and associated image capture system. The effect of subsurface defects in the strain distribution is examined.