Long-Term Mechanical Behavior of Yucca Mountain Tuff and its Variability, Final Technical Report for Task ORD-FY04-021

Daemen, J.J.K.; Ma, Li; Zhao, Guohua

doi:10.2172/878149

Cited by 1 publication

(4 citation statements)

References 27 publications

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“…As is noticed by Daemen et al (2006), the distribution of contact stresses between the specimen and loading platens in a Brazilian test is a typical contact problem, which remains difficult to be modeled numerically (e.g. Hills et al, 1993).…”

Section: Accepted Manuscriptmentioning

confidence: 99%

“…Chen et al, 1998;Ye et al, 2009). If such a determination could be made reliably and consistently, it would provide an ideal tool to investigate the spatial variability of the rock stiffness, because it requires far less time for sampling, specimen preparation, testing, and data analysis than compressive testing (Daemen et al, 2006).…”

Section: Theoretical Backgroundmentioning

confidence: 99%

“…When the fracture deviates from the center too much due to shear stress effects, for example, in most of the more than a hundred experiments, Daemen et al (2006) considered other modes of failure as invalid for determination of tensile strength. This should be considered to improve the modes of failure of specimens in the Brazilian test.…”

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

“…The history of development and applications of the Brazilian test in rock mechanics has been reviewed and investigated most recently by numerous scientists, e.g. Daemen et al (2006), Ye et al (2009), and Li and Wong (2013). Carneiro and Barcellos (1953), the pioneers of the Brazilian test method, used Hertz (1895) analysis of the action of concentrated compressive forces P in diametrically opposite points of a cylindrical disk with radius 1 R and length L (Fig.…”

Section: Introductionmentioning

confidence: 99%

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Stress-deformed state of cylindrical specimens during indirect tensile strength testing

Japaridze¹

2015

Journal of Rock Mechanics and Geotechnical Engineering

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In this study, the interaction between cylindrical specimen made of homogeneous, isotropic, and linearly elastic material and loading jaws of any curvature is considered in the Brazilian test. It is assumed that the specimen is diametrically compressed by elliptic normal contact stresses. The frictional contact stresses between the specimen and platens are neglected. The analytical solution starts from the contact problem of the loading jaws of any curvature and cylindrical specimen. The contact width, corresponding loading angle (2θ0), and elliptical stresses obtained through solution of the contact problems are used as boundary conditions for a cylindrical specimen. The problem of the theory of elasticity for a cylinder is solved using Muskhelishvili's method. In this method, the displacements and stresses are represented in terms of two analytical functions of a complex variable. In the main approaches, the nonlinear interaction between the loading bearing blocks and the specimen as well as the curvature of their surfaces and the elastic parameters of their materials are taken into account. Numerical examples are solved using MATLAB to demonstrate the influence of deformability, curvature of the specimen and platens on the distribution of the normal contact stresses as well as on the tensile and compressive stresses acting across the loaded diameter. Derived equations also allow calculating the modulus of elasticity, total deformation modulus and creep parameters of the specimen material based on the experimental data of radial contraction of the specimen.

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Section: Accepted Manuscriptmentioning

confidence: 99%

Section: Theoretical Backgroundmentioning

confidence: 99%

Section: A C C E P T E D Accepted Manuscriptmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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