Anisotropic Rock Composite Fracture Toughness Testing Device Under Tensile-Shear Stress Conditions
An anisotropic, composite fracture technology, applied in measuring devices, using stable shear force to test material strength, using stable tension/pressure to test material strength, etc., can solve the problem of inability to test composite fracture toughness, etc. To achieve the effect of convenient matching and stability
Active Publication Date: 2022-06-17
NORTHEAST GASOLINEEUM UNIV
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[0006] An object of the present invention is to provide an anisotropic rock composite fracture toughness test device under the tension-shear stress condition, and an anisotropic rock composite fracture toughness test device under this tension-shear stress condition is used to solve the fracture toughness test of existing rocks Devices can only measure the fracture toughness of rock under tension, but cannot test the problem of composite fracture toughness under the joint action of tension-shear. Another object of the present invention is to provide an isotropic Test method for heterogeneous rock composite fracture toughness test device
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[0040] The present invention will be further described below in conjunction with the accompanying drawings:
[0041] combine Figure 1-Figure 7 As shown, the anisotropic rock composite fracture toughness testing device under tensile-shear stress conditions includes a top support seat 1, a pair of upper compression frames 7, a pair of lower compression frames 9, a bottom support seat 6, and rock samples. 4; the top support seat 1 and the bottom support seat 6 are connected by two limit posts 2, and a pair of upper compression frames 7 and a pair of lower compression frames 9 are correspondingly arranged between the top support seat 1 and the bottom support seat 6 and An external pressure frame is formed, the pair of upper pressure frames 7 are symmetrically fixed under the top support base 1, the pair of lower pressure frames 9 are symmetrically fixed on the bottom support base 6, and each upper pressure plate frame is Pass between the two bolt columns of the corresponding low...
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The present invention relates to an experimental device for fracture toughness under the action of tensile-shear composite stress, which comprises a top support seat, a pair of upper pressurization frames, a pair of lower pressurization frames, a bottom support seat, and a rock sample; The top support seat and the bottom support seat are connected by a limit column, and a pair of upper pressurized frames and a pair of lower pressurized frames are correspondingly arranged between the top support seat and the bottom support seat to form an external pressurized frame, and the rock sample is located outside In the middle of the pressure frame, the rock sample has a circular through hole, the upper pressure bearing plate and the lower pressure bearing plate are placed in the circular through hole, and there are through joints on both sides of the circular through hole, and displacement sensors are installed at the joints The two end faces of the upper pressure bearing plate are respectively fixed to the upper pressure plate, and the two end surfaces of the lower pressure bearing plate are respectively fixed to the lower pressure plate. Both the upper pressure plate and the lower pressure plate are provided with a plurality of stress assembly adjustment holes. The invention can apply tensile-shear stress to different directions of the rock to destroy it, and obtain the composite fracture toughness of the rock under the tensile-shear stress condition.
Description
Technical field: [0001] The invention relates to anisotropic rocks such as bedding shale, cleat coal sample, laminated slate and the like in the fields of rock mechanics engineering, petroleum engineering, mining engineering and the like under the condition of tensile-shear composite stress. The fracture toughness testing technology specifically relates to an experimental device for the fracture toughness of anisotropic rocks under tensile-shear composite stress under the action of tensile-shear composite stress. Background technique: [0002] When artificially fracturing the reservoir, due to the anisotropy of the reservoir rock, the fracture toughness of the rock is also not constant. Therefore, people have adopted many methods to measure the fracture toughness of anisotropic rocks. Many experimental ways: [0003] (1) Direct tensile test is used to test rock fracture toughness, that is, direct tensile test. Because direct tensile test can also measure rock fracture tough...
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IPC IPC(8): G01N3/24G01N3/10G01N3/02
Inventor 张军关明阳余前港安永庆杜鸣李忠君
Owner NORTHEAST GASOLINEEUM UNIV