... of rocks in Deccan trap region which is mainly composed of Basalt. In this paper, characterization of tensile behaviour of Basalt rocks from Deccan trap is done at different loading conditions. Indirect test method namely Brazilian test is used to calculate the static indirect tensile strength at a loading...

... Abstract The indirect (Brazilian) tensile strength test is commonly used in rock engineering and rock mechanics. Most of the research on how to interpret Brazilian test is only valid for isotropic rock. The load may be applied to disc shaped samples through flat platens or curved jaws...

... ABSTRACT: In this study, a new apparatus which have new jaw clutch mechanism is designed to determine the direct tensile strength of rocks. The determination of the direct (with new apparatus) and indirect tensile strength as Brazilian test method of travertine rock was carried out...

... estimation of the tensile strength is critical since rock-like geo- and construction materials are much weaker in tension than compression or shear. The direct uniaxial pulling test (DPT), the split cylinder test also refereed as the Brazilian test (BT), the point load strength test (PLST), and lateral...

... strength (Brazilian) test is the most famous ITS determination method because of its practicality and ability to be carried out using conventional press equipments. Specimen preparation impracticality can be accepted to make some other ITS testing methods be not widely applied. One of the reasons...

... role in brittle fracturing. The Cracked Chevron-Notched Brazilian Disc (CCNBD) samples were tested to determine the fracture toughness of monsonite and sandstone samples. Since conducting fracture toughness tests are quite hard compared with the Brazilian test, the tensile strength can be determined...

... by Ojdrovic & Petroski (1985), and they believed the results from two tests were close. Proveti & Michot (2006) concluded the Brazilian test was well suited to measure the fracture resistance of materials at room temperature. However, most of researches were performed at room temperature...

... grain and interface were calibrated based on the experimental results of UCS and Brazilian tests at room temperature. For implementation of the mechanical analysis, a commercial code UDEC based on DEM theory was adopted in the present study. With the microstructures and a set of micro-parameters...

... wave reflection and unrealistic interference. Fitting the yield function numerically to stress states that cause fracture calibrates the constitutive equations. These stress states are obtained from inexpensive Brazilian tests and uniaxial compression tests. The tensile strength concept is extended...

.... As micro-cracking and damage directly influence the rock elastic properties and elastic wave velocities, the ultrasonic properties of rock under loading provide a clear view of the development of micro-fracturing. The Brazilian test has been used to apply indirect tensile loading and has been coupled...

.... As the Brazilian test has been criticized since it was initially proposed by ISRM, the aim of this study to investigate the accuracy of Brazilian jaws to determine the BTS values of brittle and ductile rocks separately. FRANC2D software was used to analyse the stress distribution at the centre of disk specimens...

... Abstract In this paper, firstly, uniaxial compression test and Brazilian test of rock were conducted to investigate the influence of surrounding non-atmospheric environments on uniaxial compressive strength and tensile strength. The environments used in this paper were organic vapor, inorganic...

... Shear Zone, India. Applicability of point load and block punch index tests in predicting uniaxial compressive strength of these rocks was also evaluated. For every available angle (β) between foliations and collected core axis (when β≠ 0°), equivalent specimens were tested under Brazilian test condition...

... test, 30 × 60 mm for the uniaxial compression test, and 30 × 30 mm for the Brazilian test. Specimens were prepared as "dry" by drying for one week in a desiccator, and as "wet" by being kept in a desiccator filled with distilled water for 5 hours using a vacuum pump. The physical properties...

... geomechanics strength variation coefficient wellbore integrity Brazilian test basalt MPa ISRM Commission tensile strength Lisbon compressive strength indirect tensile strength test conversion factor Wellbore Design Rock mechanics volcanic complex uniaxial compressive strength geomechanical...

... of twelve cores having 50mm diameter and 25mm thickness, were prepared for the Brazilian test which was adopted in this study because tensile failure is more sensitive to the effect of weathering than the compressive failure (Park, 1994). A literature review showed a variety of artificial weathering...