Multi-diameter rock core double ring direct tension rock tensile strength testing machine

Abstract

The invention discloses a multi-diameter rock core dual-ring direct tension rock tensile strength tester. The tester comprises three parts such as a loading system, a pressure monitoring and data acquisition system and a loading rack and sample clamping system. The loading system comprises an upper pressure disc, a ball head, a ball seat, a tower-shaped spring, a spherical hinge end cover, an oil cylinder, a lower pressure disc, a guide sleeve and a guide plate. The pressure monitoring and data acquisition system comprises a sensor and data acquisition subsystem, a pressure digital display screen, a monitoring compression gauge and a notebook computer data acquisition subsystem. The loading rack and sample clamping system comprises a diameter-variable rock sample inner ring pressure disc, a diameter-variable rock sample outer ring pressure disc, a lower crossbeam, stand columns, stand column fixed rings and an upper crossbeam. The tester can monitor and record the whole rock sample drawing damage test process, fast determine a tensile strength quantitative value in direct drawing of a rock, has a rigorous and reliable test principle and process and fill a gap in the research field at home.

Description

technical field [0001] The invention belongs to the field of geological exploration measurement technology and equipment, and in particular relates to a multi-diameter rock core double ring direct tensile rock tensile strength testing machine. Background technique [0002] The tensile strength of rock is an important mechanical index of rock material, which plays an irreplaceable role in the theoretical research of rock mechanics and the practical application of rock mass engineering. Tensile failure is still one of the main failure forms of engineering rock mass and natural rock mass, and because the tensile strength of rock materials is much lower than the compressive strength, the surrounding rock always starts to rupture from the tensile stress zone. In a physical sense, the tensile strength of rock refers to the ultimate stress that causes cohesion failure, and generally only uniaxial tensile strength is considered. Cai Meifeng et al. (2002) defined the uniaxial tensil...

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Problems solved by technology

[0037] In order to solve the problems existing in the existing tensile strength testing methods and equipment, the present invention provides a multi-diameter rock core double-ring direct tensile rock tensile strength testing machine

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