Multi-diameter rock core dual-ring direct tension rock tensile strength tester

A technique for tensile strength, double rings, applied in the direction of strength properties, testing material strength using applied stable tension/compression, instruments, etc.

Active Publication Date: 2016-08-31
NAT INST OF NATURAL HAZARDS MINISTRY OF EMERGENCY MANAGEMENT OF CHINA
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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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

Method used

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  • Multi-diameter rock core dual-ring direct tension rock tensile strength tester
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  • Multi-diameter rock core dual-ring direct tension rock tensile strength tester

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Embodiment 1

[0081] see Figure 9 :

[0082] A multi-diameter rock core double-circle direct tension rock tensile strength testing machine includes three parts: a loading system, a pressure monitoring and data acquisition system, a loading frame and a sample clamping system.

[0083] The loading system includes an upper platen (16), a ball head (10), a ball seat (9), a tower spring (12), a ball hinge end cover (11), an oil cylinder (8), and a lower platen (3) , guide sleeve (5) and guide plate (4). Described oil cylinder (8) is the output device of hydraulic power, has been equipped with two sets of systems of electric oil pump and manual oil pump in this set of experimental machine, the maximum output pressure of electric oil pump is 30MPa, and loading rate can be controlled to 0.005MPa / s; The maximum output pressure of the oil pump is 60MPa, the pulse output pressure, and the loading rate are closely related to the frequency of human operation. During manual operation, the operating fr...

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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 tension rock tensile strength testing machine. Background technique [0002] The tensile strength of rock is an important mechanical index of rock materials, and it 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 begins to crack from the tensile stress area. In a physical sense, rock tensile strength refers to the ultimate stress that leads to cohesive failure, and generally only uniaxial tensile strength is considered. Cai Meifeng et al. (2002) defined the uniaxial tensile str...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/10
CPCG01N3/10G01N2203/0003G01N2203/0019G01N2203/0048
Inventor 王成虎
Owner NAT INST OF NATURAL HAZARDS MINISTRY OF EMERGENCY MANAGEMENT OF CHINA
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