CN204594801U - A kind of Brazilian disc end face diametral compression test fixture - Google Patents
A kind of Brazilian disc end face diametral compression test fixture Download PDFInfo
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- CN204594801U CN204594801U CN201520352958.7U CN201520352958U CN204594801U CN 204594801 U CN204594801 U CN 204594801U CN 201520352958 U CN201520352958 U CN 201520352958U CN 204594801 U CN204594801 U CN 204594801U
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- rectangle steel
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- compression test
- test fixture
- diametral compression
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Abstract
The utility model relates to a kind of Brazilian disc end face diametral compression test fixture, it comprises four pieces of identical rectangle steel discs, one side of rectangle steel disc is processed with groove, the corner of rectangle steel disc is processed with threaded hole, the groove of two rectangle steel discs matches and forms hyposphene mouth and upper wedge mouth, upper and lower two rectangle steel discs are connected by bolt, are provided with voussoir between hyposphene mouth and upper wedge mouth.This test fixture is for being different from the end face splitting of conventional radial Brazil diametral compression test, mainly be applicable to soft rock, and rock sample thickness is relatively little, tension is made comparatively to be evenly distributed in rock sample inside, avoid because of filler strip apply line load place produce stress concentrate and make sample local crushed, the result of test is more close to tensile strength.
Description
Technical field
The utility model relates to a kind of Brazilian disc end face diametral compression test fixture, is mainly used in indoor rock mechanics experiment, measures the tensile strength of rock.
Background technology
Direct tensile test and Indirect Tensile Tests two kinds of methods are mainly contained at present for the tension parameter measuring rock.Complete because direct tensile test is more difficult in operation, usually adopt the tensile strength of Indirect Tensile Tests method test rock sample.Brazil's diametral compression test is one of standard method testing rock sample tensile strength in the world at present, is widely adopted.But along with deepening continuously of research, find that Brazilian diametral compression test itself exists comparatively big error, its test hypothesis does not conform to Griffith criterion of strength, it is a three-dimensional elasticity mechanics problem that rock Brazilian test detects tensile strength, maximum by analysis known sample end face center tension, but concentrate due to stress in Brazilian diametral compression test and exist, can not meet from end face central point crack initiation condition, and the load(ing) point crack initiation that the inevitable stress from end face is concentrated, and all relatively thin damage of rock sample Brazil's splitting to end face is larger, so measurement result can not reflect the true tensile strength of rock sample.In addition, in patent " a kind of test method being surveyed Tensile Strength of Rock under any schistosity angle by single rock sample " (patent No. 201410687741.1), refer to the vertical splitting taking the end face of cylindrical sample as splitting surface, and proved comparatively accurate.
Utility model content
This test fixture is for being different from the end face splitting of conventional radial Brazil diametral compression test, mainly be applicable to soft rock, and rock sample thickness is relatively little, tension is made comparatively to be evenly distributed in rock sample inside, avoid because of filler strip apply line load place produce stress concentrate and make sample local crushed, the result of test is more close to tensile strength.
For achieving the above object, design proposal of the present utility model is: a kind of Brazilian disc end face diametral compression test fixture, it comprises four pieces of identical rectangle steel discs, one side of rectangle steel disc is processed with groove, the corner of rectangle steel disc is processed with threaded hole, the groove of two rectangle steel discs matches and forms hyposphene mouth and upper wedge mouth, and upper and lower two rectangle steel discs are connected by bolt, are provided with voussoir between hyposphene mouth and upper wedge mouth.
Described voussoir is processed with the inclined-plane matched with hyposphene mouth and upper wedge mouth.
The side surface working that described rectangle steel disc contacts with rock sample has and is evenly arranged crisscross cutting groove.
The cross sectional shape of described voussoir is isosceles trapezoid, and upper base and hypotenuse angular range are 100 °-110 °.
The utility model has following beneficial effect:
In use, the sample processed is positioned in the test fixture assembled by the square steel disc of four block lengths, and by bolt, clamp is fixed, then voussoir is separately positioned between upper wedge mouth and hyposphene mouth, and whole device is positioned over instrument internal loads, produce tensile force by voussoir, Splitting Tensile Test is carried out to sample.The tensile strength of rock is calculated by the test findings collected.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Fig. 1 is the utility model fixture bulk testing schematic diagram.
Fig. 2 is the structural representation of the utility model rectangle steel disc.
Fig. 3 is the structural representation of the utility model voussoir.
Fig. 4 is wedge mouth and voussoir matching relationship schematic diagram on the utility model.
Fig. 5 is the structural scheme of mechanism of the utility model rectangle steel disc back side cutting groove.
In figure: hyposphene mouth 1, bolt 2, sample 3, rectangle steel disc 4, upper wedge mouth 5, voussoir 6, threaded hole 401, groove 402, cutting groove 403, inclined-plane 601.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further.
See Fig. 1-5, a kind of Brazilian disc end face diametral compression test fixture, it comprises four pieces of identical rectangle steel discs 4, one side of rectangle steel disc 4 is processed with groove 402, the corner of rectangle steel disc 4 is processed with threaded hole 401, the groove 402 of two rectangle steel discs 4 matches and forms hyposphene mouth 1 and upper wedge mouth 5, and upper and lower two rectangle steel discs 4 are connected by bolt 2, are provided with voussoir 6 between hyposphene mouth 1 and upper wedge mouth 5.
Preferably, described voussoir 6 is processed with the inclined-plane 601 matched with hyposphene mouth 1 and upper wedge mouth 5, can its Main Function be press down along the wedge mouth on rectangle steel disc 4 by above-mentioned fit structure, make the rightabout displacement of rectangle steel disc 4 generation level, thus provide a horizontal pull to sample 3.
Preferably, the side surface working that described rectangle steel disc 4 contacts with rock sample has and is evenly arranged crisscross cutting groove 403, in order to increase the friction force with sample 3, evenly transfer the pressure on rock sample.
Preferably, the cross sectional shape of described voussoir 6 is isosceles trapezoid, and upper base and hypotenuse angular range are 100 °-110 °.
In the present embodiment:
Preferably, the length span of described voussoir 6 is 70-90mm, and bottom surface is isosceles trapezoid, and two base size spans are respectively 2-3mm, 3-5mm, hypotenuse length span is 6-10mm, and base and hypotenuse angle respectively span are 70 °-80 °, 100 °-110 °.
Preferably, described rectangle steel disc 4 Thickness scope 12-20mm, length span 70-90mm, width value 25mm, the groove limit of steel disc is highly vertically 6mm, and four angle corresponding positions of rectangle steel disc 4 are equipped with threaded hole 401.
The utility model device specific works principle and the course of work are:
1, prepare diameter 50mm, the right cylinder rock sample 3 of high 2mm, polishes smooth bottom surface, and two bottom surface circles respectively draw a diameter with density bullet pen, to facilitate the bonding position determining rectangle steel disc 4.
2, with clear water, rectangle steel disc 4 fixture inner wall cleaning is clean, and dry with thieving paper.
3, sample 3 is fixed between upper and lower rectangle steel disc 4, specific implementation method is: first two rectangle steel disc 4 docking are made hyposphene mouth 1 down as going to the bottom, on two the rectangle steel discs 4 again sample 3 being placed in docking, the connecting sewing between the diameter marked with rectangle steel disc 4 aligns.Screwing bolts 2 on 8 threaded holes 401 of bottom surface rectangle steel disc 4, and make it highly be consistent.The diameter docking more other two rectangle steel discs 4 marked along sample 3 upper surface, make wedge mouth 5 upward, 8 bolts 2 are through its threaded hole 401, two rectangle steel discs 4 are pressed on sample 3, bolt 2 stretches out rectangle steel disc 4 part nut riveting, until sample 3 is compacted into as a whole by rectangle steel disc 4.
4, the entirety that fixture and sample 3 connect to is taken out, in the hyposphene mouth 1 two voussoirs 6 being snapped in respectively fixture and upper wedge mouth 5, then it is placed on RMT-150C test apparatus.
5, operating instrument starts test, instrument pressure head applies the pressure of vertical direction, upper and lower two voussoirs are pressed into along wedge mouth, rectangle steel disc 4 is subjected to displacement round about, rectangle steel disc 4 is by producing the contrary pulling force in direction with the friction force between sample to sample, until sample produces drawing crack seam and sample destroys stopping test.
6, with Wrench, fixture is separated with sample.
7, the peak load P deriving this test in a computer substitutes in formula σ=2P/ π DL(formula: σ-rock sample tensile strength MPa; P-splitting payload values N; D-rock sample diameter mm; L-rock sample thickness mm) calculate the tensile strength of rock.
By reference to the accompanying drawings embodiment of the present utility model is explained in detail, but the utility model is not limited to above-mentioned embodiment.Technician all without prejudice to innovative point of the present utility model and operation steps, in claims, can modify to above-described embodiment.Protection domain of the present utility model, should cover as claims of the present utility model.
Claims (4)
1. a Brazilian disc end face diametral compression test fixture, it is characterized in that: it comprises four pieces of identical rectangle steel discs (4), one side of rectangle steel disc (4) is processed with groove (402), the corner of rectangle steel disc (4) is processed with threaded hole (401), the groove (402) of two rectangle steel discs (4) matches and forms hyposphene mouth (1) and upper wedge mouth (5), upper and lower two rectangle steel discs (4) are connected by bolt (2), are provided with voussoir (6) between hyposphene mouth (1) and upper wedge mouth (5).
2. a kind of Brazilian disc end face diametral compression test fixture according to claim 1, is characterized in that: described voussoir (6) is processed with the inclined-plane (601) matched with hyposphene mouth (1) and upper wedge mouth (5).
3. a kind of Brazilian disc end face diametral compression test fixture according to claim 1, is characterized in that: the side surface working that described rectangle steel disc (4) contacts with rock sample has and is evenly arranged crisscross cutting groove (403).
4. a kind of Brazilian disc end face diametral compression test fixture according to claim 1 and 2, is characterized in that: the cross sectional shape of described voussoir (6) is isosceles trapezoid, and upper base and hypotenuse angular range are 100 °-110 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520352958.7U CN204594801U (en) | 2015-05-28 | 2015-05-28 | A kind of Brazilian disc end face diametral compression test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520352958.7U CN204594801U (en) | 2015-05-28 | 2015-05-28 | A kind of Brazilian disc end face diametral compression test fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204594801U true CN204594801U (en) | 2015-08-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520352958.7U Expired - Fee Related CN204594801U (en) | 2015-05-28 | 2015-05-28 | A kind of Brazilian disc end face diametral compression test fixture |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105352796A (en) * | 2015-10-26 | 2016-02-24 | 天津大学 | Variable parameter combination Brazilian splitting stress-strain test device and test method thereof |
| CN105510154A (en) * | 2016-01-01 | 2016-04-20 | 三峡大学 | Device for measuring shearing strength index of rock-soil specimen and measuring method |
| CN107607381A (en) * | 2017-11-15 | 2018-01-19 | 河南理工大学 | The wedge-shaped splitting device of bedded rock test block |
-
2015
- 2015-05-28 CN CN201520352958.7U patent/CN204594801U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105352796A (en) * | 2015-10-26 | 2016-02-24 | 天津大学 | Variable parameter combination Brazilian splitting stress-strain test device and test method thereof |
| CN105510154A (en) * | 2016-01-01 | 2016-04-20 | 三峡大学 | Device for measuring shearing strength index of rock-soil specimen and measuring method |
| CN107607381A (en) * | 2017-11-15 | 2018-01-19 | 河南理工大学 | The wedge-shaped splitting device of bedded rock test block |
| CN107607381B (en) * | 2017-11-15 | 2023-10-20 | 华侨大学 | Wedge-shaped splitting device for layered rock test block |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150826 Termination date: 20160528 |