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A simple image-based deformation measurement technique in tensile testing of geotextiles
Soumyaranjan R. Mishra, Sunil Ranjan Mohapatra, ,
Published in ICE Publishing
2017
Volume: 24
   
Issue: 3
Pages: 306 - 320
Abstract
This paper presents a simple, cost effective and reliable image processing technique for deformation measurement in geotextiles during wide width tensile strength tests. Localised strains are likely to be generated in the geotextiles due to production defects, seams and punctures. Accurate measurement of localised strains will help in better understanding the failure mechanism, maintaining proper quality control and developing accurate design procedures. Previous researchers have applied image-based strain measurement techniques using a charged coupled device camera for localised strain measurements, but those methods are expensive and not widely available. In the present study, a new method is proposed based on a complementary metal-oxide semiconductor camera, which is cost effective and easily available. The technique was applied for five different types of geotextiles, considering their range of applications. Three synthetic (one woven and two nonwoven), two natural (woven and nonwoven jute) geotextiles were used. Open source MATLAB module GeoPIV-RG softwarewas used for the analysis. The methodwas found to give accurate measurements of deformation patterns within an acceptable tolerance, with the added advantages of simplicity and cost-effectiveness. An attempt was also made to determine the feasibility of using a smartphone camera for image acquisition, thereby making the image processing technique more widespread and affordable. © 2016 Thomas Telford Ltd.
About the journal
JournalGeosynthetics International
PublisherICE Publishing
ISSN10726349
Open AccessNo
Concepts (39)
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    Cost effectiveness
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    Costs
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    Deformation
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    Digital cameras
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    Geosynthetic materials
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    Geotextiles
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    MATERIALS TESTING APPARATUS
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    Metals
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    Mos devices
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    Open source software
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    Open systems
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    Oxide semiconductors
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    Quality control
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    Smartphones
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    Strain
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    Strain measurement
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    Tensile strength
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    Tensile testing
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    Velocity measurement
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    Weaving
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    Accurate measurement
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    Complementary metal oxide semiconductors
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    DEFORMATION MEASUREMENTS
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    DEFORMATION PATTERN
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    Geosynthetics
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    Image processing technique
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    Measurement techniques
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    Particle image velocimetries
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    Image processing
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    Accuracy assessment
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    Data acquisition
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    Design
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    Digital image
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    Geotextile
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    Mobile phone
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    Particle image velocimetry
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    TESTING METHOD
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