CN110487622A - A kind of force transmission mechanism suitable for the test of rock Three-direction stretching - Google Patents
A kind of force transmission mechanism suitable for the test of rock Three-direction stretching Download PDFInfo
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- CN110487622A CN110487622A CN201910874691.0A CN201910874691A CN110487622A CN 110487622 A CN110487622 A CN 110487622A CN 201910874691 A CN201910874691 A CN 201910874691A CN 110487622 A CN110487622 A CN 110487622A
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- power transmission
- transmission arm
- rock
- pin shaft
- force transmission
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0003—Steady
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0017—Tensile
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0252—Monoaxial, i.e. the forces being applied along a single axis of the specimen
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0254—Biaxial, the forces being applied along two normal axes of the specimen
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0256—Triaxial, i.e. the forces being applied along three normal axes of the specimen
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0682—Spatial dimension, e.g. length, area, angle
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
A kind of force transmission mechanism suitable for the test of rock Three-direction stretching, including the first power transmission arm, the second power transmission arm, stretch cushion block, glued layer and bear force transmission element；First power transmission arm one end is fixed together with bearing force transmission element one end and be spirally connected, it bears the force transmission element other end and is spirally connected with load measurement part and be fixed together, the first power transmission arm other end is hinged by pin shaft and second power transmission arm one end, and the first power transmission arm and the second power transmission arm are relative to the pin shaft at hinge joint with rotational freedom；The second power transmission arm other end is spirally connected with stretching cushion block outer surface and is fixed together, and it is cemented together by glued layer and rock sample fixation to stretch cushion block inner surface；The coaxial nested arrangement of hinge hole of first power transmission arm and the second power transmission arm, pin shaft is interspersed in two hinge holes of coaxial nested arrangement, by the first power transmission arm and the second power transmission arm being freely rotated around pin shaft, the stress to eliminate rock sample loading procedure end is concentrated.
Description
Technical field
The invention belongs to rock mechanics experiment technical field, more particularly to a kind of suitable for the test of rock Three-direction stretching
Force transmission mechanism.
Background technique
The tensile strength of rock is one of rock basic mechanical index, the mechanics such as many this structure of rock structures or strength theory
Model is all using uniaxial tensile strength as one of basic parameter；In addition, at present for the 7th quadrant Three-direction stretching of stress-space
And other are two-way, the Rock Strength Theory of Three-direction stretching section, are in the supposition stage mostly, lack multi-shaft stretching test data
Verifying, and for Practical Project, the rock unit stress for having side wall surface certain distance after roadway excavation should be " two
Pressure one is drawn ", this stress state is one of inducements of geological disasters such as rock burst, wall caving, therefore carries out rock tensile failure
It tests very necessary.
Rock tensile failure test can be divided into straightway testing and indirect test, although straightway testing result is reliable, due to
Technically realize that difficulty is larger and is not used widely, instead using Brazilian splitting test method as the indirect examination of representative
It tests to have obtained the generally approval of rock mechanics circle.On the one hand, Brazilian diametral compression test result is corresponding with the true tensile strength of rock
Relationship needs further to be studied；On the other hand, with technological progress, especially high-intensitive cementing material is continuously emerged, so that directly
Test is connect to be received in the industry again.
Since there are natural heterogeneity for rock sample, or it is subject to processing precision limitation, will lead to direct tensile test very
It is easy to appear the case where stress is concentrated, so as to cause the destruction of rock sample end, in turn results in test failure.
Summary of the invention
In view of the problems of the existing technology, the present invention provides a kind of power transmission machine suitable for the test of rock Three-direction stretching
Structure is used cooperatively with true triaxial test machine, can be met under the complex stress conditions such as simple tension, biaxial tension, Three-direction stretching
Power transmission need, when power transmission, can eliminate the end stress concentration phenomenon of rock sample loading procedure, it is ensured that test result it is reliable
Property.
To achieve the goals above, the present invention adopts the following technical scheme: it is a kind of suitable for rock Three-direction stretching test
Force transmission mechanism, including the first power transmission arm, the second power transmission arm, stretch cushion block, glued layer and bear force transmission element；The first power transmission arm
One end is fixed together with bearing force transmission element one end and be spirally connected, and bears the force transmission element other end and load measurement part is spirally connected and is connected in one
It rises, the first power transmission arm other end is hinged by pin shaft and second power transmission arm one end, the first power transmission arm and the second power transmission arm
There is rotational freedom relative to the pin shaft at hinge joint；The second power transmission arm other end and stretching cushion block outer surface are spirally connected solid
It connects together, it is cemented together by glued layer and rock sample fixation to stretch cushion block inner surface.
The coaxial nested arrangement of hinge hole of the first power transmission arm and the second power transmission arm, the pin shaft are interspersed in coaxial nesting
In two hinge holes of arrangement, by the first power transmission arm and the second power transmission arm being freely rotated around pin shaft, to eliminate rock examination
The stress of sample loading procedure end is concentrated.
Beneficial effects of the present invention:
The force transmission mechanism for being suitable for the test of rock Three-direction stretching of the invention, is used cooperatively with true triaxial test machine, can
Meet the power transmission needs under the complex stress conditions such as simple tension, biaxial tension, Three-direction stretching, when power transmission can eliminate rock sample
The end stress concentration phenomenon of loading procedure, it is ensured that the reliability of test result.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of force transmission mechanism suitable for the test of rock Three-direction stretching of the invention；
In figure, the 1-the first power transmission arm, the 2-the second power transmission arm, 3-stretch cushion block, and 4-glued layers, 5-bear force transmission element,
6-load measurement parts, 7-pin shafts, 8-rock samples.
Specific embodiment
The present invention is described in further detail in the following with reference to the drawings and specific embodiments.
As shown in Figure 1, a kind of force transmission mechanism suitable for the test of rock Three-direction stretching, including the first power transmission arm 1, second pass
The arm of force 2 stretches cushion block 3, glued layer 4 and bears force transmission element 5；Described first power transmission arm, 1 one end is spirally connected with 5 one end of force transmission element is born
It is fixed together, bears 5 other end of force transmission element and be spirally connected with load measurement part 6 and be fixed together, 1 other end of the first power transmission arm passes through
Pin shaft 7 and 2 one end of the second power transmission arm are hinged, and the first power transmission arm 1 and the second power transmission arm 2 are relative to the pin shaft at hinge joint
7 have rotational freedom；Second power transmission arm, 2 other end is spirally connected with stretching 3 outer surface of cushion block and is fixed together, and stretches cushion block
3 inner surfaces are cemented together by glued layer 4 and the fixation of rock sample 8.
The coaxial nested arrangement of hinge hole of the first power transmission arm 1 and the second power transmission arm 2, the pin shaft 7 are interspersed in coaxially
In two hinge holes of nested arrangement, by the first power transmission arm 1 and the second being freely rotated around pin shaft 7 of power transmission arm 2, to eliminate
The stress of rock sample loading procedure end is concentrated.
In the present embodiment, glued layer 4 uses acrylic acid structure glue, and acrylic acid structure glue needs uniformly to be applied to stretching cushion block
Between 3 and 8 contact surface of rock sample, acrylic acid structure glue has excellent adhesive property to materials such as rock, metals, and extensive
Ability is strong, shows that acrylic acid structure glue up to 20MPa or more, is greater than exhausted the adhesion strength of rock through pulling capacity test result
The tensile strength of most of rocks.
By taking true triaxial tension test as an example, force transmission mechanism of the invention needs to prepare six sets altogether, on true triaxial test machine,
Load measurement part 6 is separately installed on the piston rod of all actuator, six surfaces of rock sample 8 pass through glued layer 4 respectively
Fixation is cementing stretching cushion block 3, is provided with one between each load measurement part 6 and stretching cushion block 3 in the same direction
Force transmission mechanism is covered, and is also connected with body between two stretching cushion blocks 3 in the same direction and becomes measuring piece, body becomes measuring piece quantity
Totally three, for measuring the stretcher strain amount of rock sample 8 in three directions.
The scope of patent protection that scheme in embodiment is not intended to limit the invention, it is all without departing from carried out by the present invention etc.
Effect implements or change, is both contained in the scope of the patents of this case.
Claims (2)
1. a kind of force transmission mechanism suitable for the test of rock Three-direction stretching, it is characterised in that: including the first power transmission arm, the second power transmission
Arm stretches cushion block, glued layer and bears force transmission element；It described first power transmission arm one end and bears force transmission element one end and is spirally connected and be connected in one
It rises, bears the force transmission element other end and be spirally connected with load measurement part and be fixed together, the first power transmission arm other end passes through pin shaft and second
Power transmission arm one end is hinged, and the first power transmission arm and the second power transmission arm have rotatably mounted relative to the pin shaft at hinge joint
Degree；The second power transmission arm other end is spirally connected with stretching cushion block outer surface and is fixed together, and stretching cushion block inner surface passes through cementing
Layer and rock sample fixation are cemented together.
2. a kind of force transmission mechanism suitable for the test of rock Three-direction stretching according to claim 1, it is characterised in that: described
The coaxial nested arrangement of hinge hole of first power transmission arm and the second power transmission arm, the pin shaft are interspersed in two hinges of coaxial nested arrangement
It connects in hole, by the first power transmission arm and the second power transmission arm being freely rotated around pin shaft, to eliminate rock sample loading procedure end
The stress in portion is concentrated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910874691.0A CN110487622A (en) | 2019-09-17 | 2019-09-17 | A kind of force transmission mechanism suitable for the test of rock Three-direction stretching |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910874691.0A CN110487622A (en) | 2019-09-17 | 2019-09-17 | A kind of force transmission mechanism suitable for the test of rock Three-direction stretching |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110487622A true CN110487622A (en) | 2019-11-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910874691.0A Pending CN110487622A (en) | 2019-09-17 | 2019-09-17 | A kind of force transmission mechanism suitable for the test of rock Three-direction stretching |
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| CN (1) | CN110487622A (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59225333A (en) * | 1983-06-06 | 1984-12-18 | Shimadzu Corp | Load detecting method of material testing machine |
| JPS61277032A (en) * | 1985-05-31 | 1986-12-08 | Mitsui Eng & Shipbuild Co Ltd | Tensile-testing method |
| CN103323329A (en) * | 2013-07-08 | 2013-09-25 | 山东大学 | Test method for performing rock direct stretching by using axial centering positioning device |
| CN105486582A (en) * | 2016-01-22 | 2016-04-13 | 中国地质大学（武汉） | Rock tensile tester provided with automatic rectification devices |
| CN107389451A (en) * | 2017-08-30 | 2017-11-24 | 广州大学 | A kind of bitumastic tension test platform for eliminating eccentric bending moment and its test method |
| CN107991176A (en) * | 2018-01-30 | 2018-05-04 | 中南大学 | A kind of tensile test apparatus and its method of three axis of rock |
| CN108562491A (en) * | 2018-04-24 | 2018-09-21 | 钦州学院 | Automatic centering type rocks in direct tension experimental rig |
| CN208187850U (en) * | 2018-04-24 | 2018-12-04 | 钦州学院 | Automatic centering type rocks in direct tension experimental rig |
| CN109100221A (en) * | 2018-07-12 | 2018-12-28 | 宜特(上海)检测技术有限公司 | Tension test jig and tensile testing system |
-
2019
- 2019-09-17 CN CN201910874691.0A patent/CN110487622A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59225333A (en) * | 1983-06-06 | 1984-12-18 | Shimadzu Corp | Load detecting method of material testing machine |
| JPS61277032A (en) * | 1985-05-31 | 1986-12-08 | Mitsui Eng & Shipbuild Co Ltd | Tensile-testing method |
| CN103323329A (en) * | 2013-07-08 | 2013-09-25 | 山东大学 | Test method for performing rock direct stretching by using axial centering positioning device |
| CN105486582A (en) * | 2016-01-22 | 2016-04-13 | 中国地质大学（武汉） | Rock tensile tester provided with automatic rectification devices |
| CN107389451A (en) * | 2017-08-30 | 2017-11-24 | 广州大学 | A kind of bitumastic tension test platform for eliminating eccentric bending moment and its test method |
| CN107991176A (en) * | 2018-01-30 | 2018-05-04 | 中南大学 | A kind of tensile test apparatus and its method of three axis of rock |
| CN108562491A (en) * | 2018-04-24 | 2018-09-21 | 钦州学院 | Automatic centering type rocks in direct tension experimental rig |
| CN208187850U (en) * | 2018-04-24 | 2018-12-04 | 钦州学院 | Automatic centering type rocks in direct tension experimental rig |
| CN109100221A (en) * | 2018-07-12 | 2018-12-28 | 宜特(上海)检测技术有限公司 | Tension test jig and tensile testing system |
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Application publication date: 20191122 |
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