CN107271268A - A kind of cement base thin plate axis pulling experiment device and its test method - Google Patents
A kind of cement base thin plate axis pulling experiment device and its test method Download PDFInfo
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- CN107271268A CN107271268A CN201710553466.8A CN201710553466A CN107271268A CN 107271268 A CN107271268 A CN 107271268A CN 201710553466 A CN201710553466 A CN 201710553466A CN 107271268 A CN107271268 A CN 107271268A
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- 238000002474 experimental method Methods 0.000 title claims abstract description 78
- 239000004568 cement Substances 0.000 title claims abstract description 43
- 238000010998 test method Methods 0.000 title abstract description 9
- 238000012360 testing method Methods 0.000 claims abstract description 99
- 238000000034 method Methods 0.000 claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 35
- 239000010959 steel Substances 0.000 claims description 35
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 19
- 239000011888 foil Substances 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 3
- 239000011347 resin Substances 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- 230000006378 damage Effects 0.000 abstract description 5
- 239000004567 concrete Substances 0.000 description 9
- 239000000463 material Substances 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 208000033999 Device damage Diseases 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 235000000396 iron Nutrition 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- G01N3/04—Chucks
-
- 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
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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
Constituted the invention discloses a kind of cement base thin plate axis pulling experiment device and its test method, including in two parts main unit of symmetric relation, include ball pivot, tripod, D-shaped connector and fixture per portion body unit；Wherein：Ball pivot one end is connected by testing machine loading head with testing machine, the drift angle end connection of the ball pivot other end and tripod, and the base end of tripod is connected by D-shaped connector with fixture；Fixture includes the clamping plate and caging bolt that two panels is oppositely arranged, and caging bolt is set through two panels clamping plate, and caging bolt is used for spacing to experiment test specimen progress；Present invention also offers a kind of cement base thin plate axis pulling experiment method based on above-mentioned cement base thin plate axis pulling experiment device, the apparatus and method provided using the present invention have simple to operate, test specimen damage is small during test, and stress state during test specimen tension can be preferably reacted, makes test result more accurately advantage.
Description
Technical field
The present invention relates to axis pulling experiment technical field, more particularly to a kind of cement base thin plate axis pulling experiment device and its examination
Proved recipe method.
Background technology
Cement-based material axial tensile strength and limit stretch value are the weights of Mechanical Properties of Cement-based Materials and deformation performance
Want parameter.Fiber-reinforced mortar/the concrete being widely studied at present needs to be measured its tensile strength, to evaluate its power
Learn performance.In addition, particularly to structures such as concrete for hydraulic structure and dam concretes, concrete tensile property is directly related to structure
Security.Therefore, the test of correct response Mechanical Properties of Cement-based Materials turns into the important step for controlling its property.Common
Analysis of Concrete Tensile experiment has three kinds：Uniaxial direct tension, bending test, split drawing experiment.Split drawing experiment in, test specimen be in two to should
Power state, when test specimen is single load bearing in curved drawing and axis pulling experiment, but curved drawing test specimen section stress is not triangular in shape point
Cloth, so axle draws stress more simple, it is ideal Analysis of Concrete Tensile Strength Testing Methods.
For concrete in uniaxial direct tension experiment, Specimen Shape and the different of method of clamping influence very on result of the test
Greatly.Clamp method widely used at present can be divided into external clamping, built-in type and adhesive type three basic forms of it.The test specimen of external clamping
Mostly thin plate test specimen, test specimen frictionally transmits pulling force, but this method makes holding position concrete be in two dimensional stress state,
Test specimen is easily in holding position destruction.Built-in type is that, in test piece end pre-embedded bolt or reinforcing bar, kind mode is relatively difficult to ensure card embedded bar
Or the accurate centering of bolt, and the transmission of stress is extremely complex, it is impossible to ensure uniform tension state of the test specimen in total length.With it is outer
Clip is compared with built-in type, and the stress transmission of adhesive type test piece end is preferable, but stress concentration is still more substantially, and binding agent
It can not reuse, experimentation cost is higher.
To sum up, existing cement base thin plate axis pulling experiment device, exists and is easily destroyed test specimen, cumbersome, it is impossible to compared with
The problem of stress state during good reaction test specimen tension.
The content of the invention
It is above-mentioned existing to solve it is an object of the invention to provide a kind of cement base thin plate axis pulling experiment device and its test method
The problem of with the presence of technology, with simple to operate, test specimen damage is small during test, and when can preferably react test specimen tension
Stress state, makes test result more accurately advantage.
To achieve the above object, the invention provides following scheme：
The present invention provides a kind of cement base thin plate axis pulling experiment device, and the axis pulling experiment device is by two of symmetric relation
Divide main unit composition, include ball pivot, tripod, D-shaped connector and fixture per portion body unit；Wherein：
Described ball pivot one end is connected by testing machine loading head with testing machine, the ball pivot other end and the tripod
Drift angle end is connected, and the base end of the tripod is connected by D-shaped connector with the fixture；It is relative that the fixture includes two panels
The clamping plate and caging bolt of setting, the caging bolt pass through clamping plate described in two panels to set, and the caging bolt is used for experiment
Test specimen carries out spacing.
Preferably, the tripod is equilateral triangle steel construction, including is set to two braces and the setting of two hypotenuses
For a cylindrical bar on base.
Preferably, the clamping plate includes integrally formed rectangular steel plates and trapezoidal steel plate, and the rectangular steel plates are located at described
At the long base of trapezoidal steel plate, the length of the rectangular steel plates and the equal length on the trapezoidal long base of steel plate.
Preferably, the caging bolt is set to two rows, and caging bolt described in two rows is symmetricly set in the trapezoidal steel plate
On, the line of centres for often arranging the caging bolt is parallel with the hypotenuse of the trapezoidal steel plate adjacent thereto.
Preferably, the D-shaped connector includes the shank of bolt of U-shaped crude iron ring and bolt in the U-shaped crude iron ring openend,
The arc end of the U-shaped crude iron ring is sheathed on the outside of the cylindrical bar, and the openend of the U-shaped crude iron ring passes through the spiral shell
Tightening latch is connected with the rectangular steel plates.
Preferably, the D-shaped connector is equidistantly disposed between the cylindrical bar and the rectangular steel plates
It is multiple.
Preferably, spaced set has multiple shallow slots successively on the cylindrical bar, and the U-shaped crude iron ring is connected in described
In shallow slot.
Preferably, it is provided with rubber blanket on the inside of the clamping plate.
Present invention also offers a kind of cement base thin plate axis pulling experiment method, including tests below step：
Step 1: experiment test specimen two ends to be made to the shape matched with the arrangement mode of the caging bolt on fixture, make
Test specimen two ends can be limited the spacing fixation of bolt；
Step 2: will be polished smooth in the middle part of experiment test specimen, and is carried out with resin levelling, paste strain of the length for 50mm
Piece, deformeter is connected by foil gauge by wire, to measure the ultimate tensile strength of experiment test specimen；
Step 3: experiment test specimen two ends are respectively arranged in two main units of cement base thin plate axis pulling experiment device
Between clamping plate, caging bolt is installed successively, and screws caging bolt, and experiment test specimen is fixed；
Step 4: the testing machine loading head by testing machine respectively with two main units is connected, starts testing machine and added
Carry in experiment, process of the test, the software systems that the load-deformation curve of test specimen is configured by testing machine are acquired.
Preferably, the bell shape extended out is specifically made in the two ends of the experiment test specimen.
The present invention achieves following advantageous effects relative to prior art：
1st, the present invention is provided cement base thin plate axis pulling experiment device and its test method, by the retained part of test specimen two ends
It is made and extends out shape horn structure, using setting bolt is come the hypotenuse of clamping test specimen two on clamping plate and combines the compound of clamping plate outer clip
Method of clamping, it is easy to operate, traditional external clamping can be effectively improved to destroying serious defect at specimen holder；
2nd, the present invention is provided cement base thin plate axis pulling experiment device and its test method, compared with built-in type, its power transmission
Path is simply clear and definite, can guarantee that test specimen tension in length range；Compared with adhesive type, the shadow of stress concentration is effectively reduced
Ring, and do not need bonding agent, not only avoid the trouble of cleaning fixture, also save experimentation cost；
3rd, the cement base thin plate axis pulling experiment device that provides of the present invention and its test method, can preferably react test specimen by
Stress state during drawing, effectively determines the uniaxial direct tensile performance of cement-based material, makes test result more accurate, can be research water
Cement-based material mechanical property provides more structurally sound technical support.
4th, reliable, conjunction is connected between the present invention is provided cement base thin plate axis pulling experiment device and its test method, each device
Reason, installs, tests easy.The setting of wherein ball pivot can reduce the influence of torsion, can effectively apply axial load, clamping plate can root
Changed according to the size of test specimen, can clamping dimension scope it is wide.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to institute in embodiment
The accompanying drawing needed to use is briefly described, it should be apparent that, drawings in the following description are only some implementations of the present invention
Example, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the forward structure schematic diagram of cement base thin plate axis pulling experiment device in the present invention；
Fig. 2 is the partial side structural representation of cement base thin plate axis pulling experiment device in the present invention；
Fig. 3 is the forward structure schematic diagram of the clamping plate of cement base thin plate axis pulling experiment device in the present invention；
Fig. 4 is the decomposition texture schematic diagram of the D-shaped connector of cement base thin plate axis pulling experiment device in the present invention；
Fig. 5 is the structural representation of the cylindrical bar of the tripod of cement base thin plate axis pulling experiment device in the present invention；
In figure：1- testing machines loading head, 2- ball pivots, 3- braces, 4- cylindrical bars, 5-D shapes connector, 6- clamping plates, 7- limits
Position bolt, 8- experiments test specimen, 9-U shape crude irons ring, 10- shanks of bolt, 11- rectangular steel plates, the trapezoidal steel plates of 12-, 13- shallow slots.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
It is an object of the invention to provide a kind of cement base thin plate axis pulling experiment device and its test method, to solve existing skill
The problem of art is present.
In order to facilitate the understanding of the purposes, features and advantages of the present invention, it is below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is further detailed explanation.
The present embodiment provides a kind of cement base thin plate axis pulling experiment device, and experiment can be reduced by the axis pulling experiment device
Damage of the test specimen in axis pulling experiment, and stress state when can preferably react test specimen tension, make test result more smart
It is accurate；
As Figure 1-5, the cement base thin plate axis pulling experiment device that the present embodiment is provided is by two parts in symmetric relation
Main unit is constituted, and includes ball pivot 2, tripod, D-shaped connector 5 and fixture per portion body unit；Wherein, the one end of ball pivot 2 leads to
Overtesting machine loading head 1 is connected with testing machine (not depending on going out in figure), the drift angle end connection of the other end of ball pivot 2 and tripod, triangle
The base end of frame is connected by D-shaped connector 5 with fixture；Fixture then includes clamping plate 6 and caging bolt 7 that two panels is oppositely arranged,
Caging bolt 7 is set through two panels clamping plate 6, and caging bolt 7 is spacing for being carried out to experiment test specimen 8.
Tripod is specifically set to equilateral triangle steel construction in the present embodiment, two braces 3 are set to triangle
Two hypotenuses, cylindrical bar 4 is set to the base of triangle.The clamping plate 6 of fixture is reached into by integrally formed rectangular steel plates 11 and ladder
Shape steel plate 12 is constituted, and rectangular steel plates 11 are located at the long base of trapezoidal steel plate 12, the length of rectangular steel plates 11 and trapezoidal steel plate 12
The equal length on long base；Caging bolt 7 is provided with two rows, and two row's caging bolts 7 are symmetricly set on trapezoidal steel plate 12, often arranged
The line of centres of caging bolt 7 is parallel with the hypotenuse of trapezoidal steel plate 12 adjacent thereto；In addition, the inner side of two clamping plate 6 is also set up
There is rubber blanket (not depending on going out in figure), further to reduce damage of the clamping plate 6 to test specimen.
D-shaped connector 5 includes U-shaped crude iron ring 9 and bolt in the shank of bolt 10 of the openend of U-shaped crude iron ring 9, U-shaped crude iron ring 9
Arc end be sheathed on the outside of cylindrical bar 4, the openend of U-shaped crude iron ring 9 is connected by shank of bolt 10 with rectangular steel plates 11,
Specific be oppositely arranged on the side wall of the openend of U-shaped crude iron ring 9 on bolt hole, two clamping plates 6 is also provided with upper bolt hole, by spiral shell
Tightening latch 10 sequentially passes through the bolt hole on U-shaped crude iron ring 9 and clamping plate 6, you can realize consolidating for the openend of U-shaped crude iron ring 9 and clamping plate 6
Fixed connection.
In the present embodiment, D-shaped connector 5 is specifically set to 3, it is equidistant successively on the cylindrical bar 4 of tripod
The U-shaped crude iron ring 9 being provided with 3 shallow slots 13, D-shaped connector 5 is connected in shallow slot 13 successively, is existed with limiting U-shaped crude iron ring 9
Slided on cylindrical bar 4；
The cement base thin plate axis pulling experiment device that the present invention is provided, the size of all parts can be according to experiment test specimen 8
Flexible in size is selected, during concrete application, is first respectively set at the two ends for testing test specimen 8 and the spacing spiral shell of two rows before experiment
Bolt 7 is engaged bell shape, that is to say, that the hypotenuse of the experiment bell-mouthed hypotenuse in the two ends of test specimen 8 also respectively with trapezoidal steel plate 12
It is parallel, and caging bolt 7 is sequentially arranged in the outside of two hypotenuses of experiment test specimen 8, and such setting is that experiment examination can be achieved
Part 8 is spacing axially outward, it is ensured that on the premise of experiment test specimen 8 is not by too big fixture chucking power damage, obtain experiment test specimen 8
With fixation, and be not in the phenomenon of stress concentration, make test result more accurate.
Based on above-mentioned cement base thin plate axis pulling experiment device, present invention also offers a kind of cement base thin plate axis pulling experiment side
Method, including tests below step：
Step 1: experiment test specimen 8 two ends are made to the shape matched with the arrangement mode of the caging bolt 7 on fixture,
The bell shape that the two ends mentioned in said structure are extended out, enables test specimen two ends to be limited the spacing fixation of bolt 7；
Step 2: the middle part for testing test specimen 8 is polished smooth, and is carried out with resin levelling, paste length answering for 50mm
Become piece, foil gauge is connected into deformeter by wire, to measure the ultimate tensile strength of experiment test specimen 8；
Step 3: experiment test specimen 8 two ends to be respectively arranged in two main units of cement base thin plate axis pulling experiment device
Clamping plate 6 between, install caging bolt 7 successively, and screw caging bolt 7, experiment test specimen 8 fixed；
Step 4: the testing machine loading head 1 by testing machine respectively with two main units is connected, starts testing machine and added
Carry in experiment, process of the test, the software systems that the load-deformation curve of test specimen is configured by testing machine are acquired.
The principle and embodiment of the present invention are set forth invention applies specific case, above example is said
The bright method and its core concept for being only intended to help to understand the present invention；Simultaneously for those of ordinary skill in the art, foundation
The thought of the present invention, will change in specific embodiments and applications.To sum up, this specification content should not be managed
Solve as limitation of the present invention.
Claims (10)
1. a kind of cement base thin plate axis pulling experiment device, it is characterised in that：The axis pulling experiment device is by two of symmetric relation
Divide main unit composition, include ball pivot, tripod, D-shaped connector and fixture per portion body unit；Wherein：
Described ball pivot one end is connected by testing machine loading head with testing machine, the drift angle of the ball pivot other end and the tripod
End connection, the base end of the tripod is connected by D-shaped connector with the fixture；The fixture is oppositely arranged including two panels
Clamping plate and caging bolt, the caging bolt pass through described in two panels clamping plate set, the caging bolt be used for experiment test specimen
Carry out spacing.
2. cement base thin plate axis pulling experiment device according to claim 1, it is characterised in that：The tripod is equilateral three
Angular steel construction, including be set to two braces of two hypotenuses and be set to a cylindrical bar on base.
3. cement base thin plate axis pulling experiment device according to claim 2, it is characterised in that：The clamping plate include one into
The rectangular steel plates of type and trapezoidal steel plate, the rectangular steel plates are located at the long base of the trapezoidal steel plate, the rectangular steel plates
Length and the equal length on the trapezoidal long base of steel plate.
4. cement base thin plate axis pulling experiment device according to claim 3, it is characterised in that：The caging bolt is set to
Two rows, caging bolt described in two rows is symmetricly set on the trapezoidal steel plate, often arrange the line of centres of the caging bolt with
The hypotenuse of the trapezoidal steel plate adjacent thereto is parallel.
5. cement base thin plate axis pulling experiment device according to claim 4, it is characterised in that：The D-shaped connector includes U
Shape crude iron ring is sheathed on the circle with the shank of bolt in the U-shaped crude iron ring openend, the arc end of the U-shaped crude iron ring is bolted
The outside of cylindrical rod, the openend of the U-shaped crude iron ring is connected by the shank of bolt with the rectangular steel plates.
6. cement base thin plate axis pulling experiment device according to claim 5, it is characterised in that：The D-shaped connector is in institute
State equidistantly be disposed between cylindrical bar and the rectangular steel plates it is multiple.
7. cement base thin plate axis pulling experiment device according to claim 6, it is characterised in that：On the cylindrical bar successively
Spaced set has multiple shallow slots, and the U-shaped crude iron ring is connected in the shallow slot.
8. cement base thin plate axis pulling experiment device according to claim 7, it is characterised in that：It is provided with the inside of the clamping plate
Rubber blanket.
9. a kind of cement base thin plate axis pulling experiment method, it is characterised in that including tests below step：
Step 1: experiment test specimen two ends to be made to the shape matched with the arrangement mode of the caging bolt on fixture, make test specimen
Two ends can be limited the spacing fixation of bolt；
Step 2: will be polished smooth in the middle part of experiment test specimen, and is carried out with resin levelling, pastes foil gauge of the length for 50mm,
Foil gauge is connected into deformeter by wire, to measure the ultimate tensile strength of experiment test specimen；
Step 3: the clamping plate that test specimen two ends are respectively arranged in two main units of cement base thin plate axis pulling experiment device will be tested
Between, caging bolt is installed successively, and caging bolt is screwed, experiment test specimen is fixed；
Step 4: the testing machine loading head by testing machine respectively with two main units is connected, starts testing machine and carry out loading examination
Test, in process of the test, the software systems that the load-deformation curve of test specimen is configured by testing machine are acquired.
10. cement base thin plate axis pulling experiment method according to claim 9, it is characterised in that：The two of the experiment test specimen
Specifically the bell shape extended out is made in end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710553466.8A CN107271268A (en) | 2017-07-08 | 2017-07-08 | A kind of cement base thin plate axis pulling experiment device and its test method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710553466.8A CN107271268A (en) | 2017-07-08 | 2017-07-08 | A kind of cement base thin plate axis pulling experiment device and its test method |
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| CN107271268A true CN107271268A (en) | 2017-10-20 |
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| CN201710553466.8A Pending CN107271268A (en) | 2017-07-08 | 2017-07-08 | A kind of cement base thin plate axis pulling experiment device and its test method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107727492A (en) * | 2017-10-23 | 2018-02-23 | 四川大学 | A kind of universal long bone biomechanical fixture |
| CN108007768A (en) * | 2017-12-08 | 2018-05-08 | 河海大学 | The axis pulling experiment device and test method of a kind of web or pieces of cloth |
| CN111289356A (en) * | 2020-03-06 | 2020-06-16 | 同济大学 | Test fixture for concrete axial tension force and use method thereof |
| CN111678779A (en) * | 2020-05-14 | 2020-09-18 | 超威电源集团有限公司 | Method for testing plate grid performance |
| CN115508205A (en) * | 2022-10-09 | 2022-12-23 | 上海航空材料结构检测股份有限公司 | Composite material cap type stringer pull-off test device and test method |
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| CN111289356A (en) * | 2020-03-06 | 2020-06-16 | 同济大学 | Test fixture for concrete axial tension force and use method thereof |
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| CN115508205A (en) * | 2022-10-09 | 2022-12-23 | 上海航空材料结构检测股份有限公司 | Composite material cap type stringer pull-off test device and test method |
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Application publication date: 20171020 |