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Triaxial tensile testing device and method for rocks

A tensile test, rock technology, applied in the direction of measuring device, using stable tension/pressure test material strength, instrument, etc., can solve the problem of inability to carry out triaxial tensile test, etc., to achieve easy control and easy control of the test process. , the effect of flexible test methods

Inactive Publication Date: 2018-05-04
CENT SOUTH UNIV
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  • Abstract
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Problems solved by technology

The American MTS 815 testing machine is a high-end large-scale instrument for studying rock mechanical performance parameters. It can perform complex triaxial compression tests on rocks, but cannot perform triaxial tensile tests.

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  • Triaxial tensile testing device and method for rocks
  • Triaxial tensile testing device and method for rocks
  • Triaxial tensile testing device and method for rocks

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Embodiment Construction

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0040] According to the requirements of the experiment, there are two options for the size of the rock sample to be tested: 50×100mm or 30×100mm (dog bone shape). The test device can meet the tensile test requirements of the tested rock sample 1 in a triaxial state.

[0041] Such as Figure 1-10 As shown, a rock triaxial tensile test device includes a follow-up interlock device and a multi-degree-of-freedom triaxial tensile fixture, and the follow-up...

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Abstract

The invention provides a triaxial tensile testing device and method for rocks. The triaxial tensile testing device comprises a follow-up interlocking device for enabling a loading platform to do freemovement along a piston of an actuator, a step type strip-shaped sliding rail and a multi-degree-of-freedom axial direct tensile clamp mounted in a triaxial chamber of a testing machine. The device provided by the invention is simple in structure, reasonable in design and simple and convenient to machine and produce, and use and operate; testing researches of triaxial tensile mechanical propertiesof the rocks under various complicated conditions can be conveniently, rapidly, stably and reliably finished by utilizing rock triaxial compression testing machines including an MTS815 type and the like, which only can be used for carrying out a rock test piece triaxial compression test, through the follow-up interlocking device and the multi-degree-of-freedom axial direct tensile clamp.

Description

technical field [0001] The invention relates to the technical field of rock mechanics testing, in particular to a rock triaxial tensile test device and a method thereof. Background technique [0002] In the design and construction of underground engineering, the tensile strength of rock is a very important mechanical index. The surrounding rock mass of underground engineering is often in a complex stress state, some parts are in a compressive stress state, and some places are in a tensile stress state. Since the tensile strength of the rock is much lower than the compressive strength, the surrounding rock is always under tension. The stress zone begins to fail. Therefore, the correct regional division of the stress state of the underground surrounding rock, that is, the determination of the failure risk area is the key to the analysis and evaluation of the stability of the underground engineering surrounding rock, and the rock tensile strength is one of the basic data for d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/04G01N3/08
Inventor 马春德郭春志潘素平刘泽霖龙珊
Owner CENT SOUTH UNIV
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