Diametrical and Axial Indirect Tensile Testing Using H-Ometer on a Weak Rock Model and Its Finite Element Simulation

A method of testing for the tensile strength of weak rock from H-Ometer is presented. H-Ometer tests are carried out on artificial weak rock specimen to test for the accuracy of the model. The weak rock is a simulation of weakly cemented sandstone, which is assumed homogeneous and isotropic and cont...

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Main Author:	Ahmad, Juraidah
Format:	Thesis
Language:	English English
Published:	2001
Subjects:	Finite element method
Online Access:	http://psasir.upm.edu.my/id/eprint/11170/1/FK_2001_55.pdf
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id	my-upm-ir.11170
record_format	uketd_dc
spelling	my-upm-ir.111702024-05-30T08:53:01Z Diametrical and Axial Indirect Tensile Testing Using H-Ometer on a Weak Rock Model and Its Finite Element Simulation 2001-06 Ahmad, Juraidah A method of testing for the tensile strength of weak rock from H-Ometer is presented. H-Ometer tests are carried out on artificial weak rock specimen to test for the accuracy of the model. The weak rock is a simulation of weakly cemented sandstone, which is assumed homogeneous and isotropic and contains no discontinuities. Presently, the existing method of in direct tensile testing using the H-Ometer test is carried out on diametrical specimen model. In this study, efforts to determine a suitable method of testing are carried out on both axial and diametrical model position. The test was conducted on both model specimens, which is subjected to incremental load until failure occurs, and at each load response, the deformation, crack pattern and tensile strength were determined. In this study, a 3-Dimensional elasto-plastic analysis of the experimental work using commercially available LUSAS Finite Element Method is carried out to simulate the performance of H-Ometer on both axial and diametrical model specimens. The ability of the simulated models to predict the tensile strength and crack pattern from H-Ometer will validate the experimental results. Comparison of results for both diametrical and axial model specimen will determine the appropriate model specimen that will give accurate results from H-Ometer test. Throughout this investigation, results of both model specimens carried out using H-Ometer testing device is found to be reliable with indirect tensile strength values ranging from 0.256 MPa to 0.218 MPa. As for the numerical analysis, tensile strength results of both models differ by 1.3%, which is almost negligible and indicates that ideally, either testing position is appropriate. However, experimentally, the axial model agreed more closely to the finite element analysis, which differs by 3.6% compared to 11.3% for the diametrical model. Finite element method 2001-06 Thesis http://psasir.upm.edu.my/id/eprint/11170/ http://psasir.upm.edu.my/id/eprint/11170/1/FK_2001_55.pdf text en public masters Universiti Putra Malaysia Finite element method Faculty of Engineering Hassim, Salihudin English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
advisor	Hassim, Salihudin
topic	Finite element method
spellingShingle	Finite element method Ahmad, Juraidah Diametrical and Axial Indirect Tensile Testing Using H-Ometer on a Weak Rock Model and Its Finite Element Simulation
description	A method of testing for the tensile strength of weak rock from H-Ometer is presented. H-Ometer tests are carried out on artificial weak rock specimen to test for the accuracy of the model. The weak rock is a simulation of weakly cemented sandstone, which is assumed homogeneous and isotropic and contains no discontinuities. Presently, the existing method of in direct tensile testing using the H-Ometer test is carried out on diametrical specimen model. In this study, efforts to determine a suitable method of testing are carried out on both axial and diametrical model position. The test was conducted on both model specimens, which is subjected to incremental load until failure occurs, and at each load response, the deformation, crack pattern and tensile strength were determined. In this study, a 3-Dimensional elasto-plastic analysis of the experimental work using commercially available LUSAS Finite Element Method is carried out to simulate the performance of H-Ometer on both axial and diametrical model specimens. The ability of the simulated models to predict the tensile strength and crack pattern from H-Ometer will validate the experimental results. Comparison of results for both diametrical and axial model specimen will determine the appropriate model specimen that will give accurate results from H-Ometer test. Throughout this investigation, results of both model specimens carried out using H-Ometer testing device is found to be reliable with indirect tensile strength values ranging from 0.256 MPa to 0.218 MPa. As for the numerical analysis, tensile strength results of both models differ by 1.3%, which is almost negligible and indicates that ideally, either testing position is appropriate. However, experimentally, the axial model agreed more closely to the finite element analysis, which differs by 3.6% compared to 11.3% for the diametrical model.
format	Thesis
qualification_level	Master's degree
author	Ahmad, Juraidah
author_facet	Ahmad, Juraidah
author_sort	Ahmad, Juraidah
title	Diametrical and Axial Indirect Tensile Testing Using H-Ometer on a Weak Rock Model and Its Finite Element Simulation
title_short	Diametrical and Axial Indirect Tensile Testing Using H-Ometer on a Weak Rock Model and Its Finite Element Simulation
title_full	Diametrical and Axial Indirect Tensile Testing Using H-Ometer on a Weak Rock Model and Its Finite Element Simulation
title_fullStr	Diametrical and Axial Indirect Tensile Testing Using H-Ometer on a Weak Rock Model and Its Finite Element Simulation
title_full_unstemmed	Diametrical and Axial Indirect Tensile Testing Using H-Ometer on a Weak Rock Model and Its Finite Element Simulation
title_sort	diametrical and axial indirect tensile testing using h-ometer on a weak rock model and its finite element simulation
granting_institution	Universiti Putra Malaysia
granting_department	Faculty of Engineering
publishDate	2001
url	http://psasir.upm.edu.my/id/eprint/11170/1/FK_2001_55.pdf
_version_	1804888619097260032

Diametrical and Axial Indirect Tensile Testing Using H-Ometer on a Weak Rock Model and Its Finite Element Simulation

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