Experimental and numerical analysis of indirect and direct tensile strength using fracture mechanics concepts

Brazilian tests were conducted on an isotropic limestone with different length-to-diameter ratios and various bearing strip widths. The direct tensile strength of the rock specimens was also obtained using direct tension test apparatus and a servo-control testing machine. The Brazilian test was mode...

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Published inBulletin of engineering geology and the environment Vol. 71; no. 2; pp. 269 - 283
Main Authors Fahimifar, A., Malekpour, M.
Format Journal Article
LanguageEnglish
Published Berlin/Heidelberg Springer-Verlag 01.05.2012
Subjects
Earth and Environmental Science
Earth Sciences
Foundations
Geoecology/Natural Processes
Geoengineering
Geotechnical Engineering & Applied Earth Sciences
Hydraulics
Nature Conservation
Original Paper
Brazilian test
Direct tension test
Width of bearing strip
Fracture mechanics
Rock
Geometrical ratio
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Abstract Brazilian tests were conducted on an isotropic limestone with different length-to-diameter ratios and various bearing strip widths. The direct tensile strength of the rock specimens was also obtained using direct tension test apparatus and a servo-control testing machine. The Brazilian test was modeled using the computer program (Abaqus 6.7-1) and both smeared rotating crack and cohesive crack models were selected for the analysis of crack propagation. Comparison of the experimental and numerical analyses showed that the results from the smeared rotating crack model were closer to the experimental results than those from the cohesive crack model. Appropriate testing conditions for the Brazilian test are proposed, in order to achieve the results closest to the direct tension test.
AbstractList Brazilian tests were conducted on an isotropic limestone with different length-to-diameter ratios and various bearing strip widths. The direct tensile strength of the rock specimens was also obtained using direct tension test apparatus and a servo-control testing machine. The Brazilian test was modeled using the computer program (Abaqus 6.7-1) and both smeared rotating crack and cohesive crack models were selected for the analysis of crack propagation. Comparison of the experimental and numerical analyses showed that the results from the smeared rotating crack model were closer to the experimental results than those from the cohesive crack model. Appropriate testing conditions for the Brazilian test are proposed, in order to achieve the results closest to the direct tension test.
Author Fahimifar, A.
Malekpour, M.
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  email: Majid.malakpoor@gmail.com
  organization: Department of Civil and Environmental Engineering, Amirkabir University of Technology
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Issue 2
Keywords Brazilian test
Direct tension test
Width of bearing strip
Fracture mechanics
Rock
Geometrical ratio
Language English
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PublicationTitle Bulletin of engineering geology and the environment
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PublicationYear 2012
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Snippet Brazilian tests were conducted on an isotropic limestone with different length-to-diameter ratios and various bearing strip widths. The direct tensile strength...
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SubjectTerms Earth and Environmental Science
Earth Sciences
Foundations
Geoecology/Natural Processes
Geoengineering
Geotechnical Engineering & Applied Earth Sciences
Hydraulics
Nature Conservation
Original Paper
Title Experimental and numerical analysis of indirect and direct tensile strength using fracture mechanics concepts
URI https://link.springer.com/article/10.1007/s10064-011-0402-7
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