CN207095976U - A kind of piece fixture for Concrete Material tensile test - Google Patents
A kind of piece fixture for Concrete Material tensile test Download PDFInfo
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- CN207095976U CN207095976U CN201721083442.2U CN201721083442U CN207095976U CN 207095976 U CN207095976 U CN 207095976U CN 201721083442 U CN201721083442 U CN 201721083442U CN 207095976 U CN207095976 U CN 207095976U
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Abstract
A kind of piece fixture for Concrete Material tensile test of the utility model.The fixture includes upper holder and lower holder.Upper holder includes connecting rod, neck, fastening bolt and nut, and lower holder includes pedestal, neck, fastening bolt and nut.One end of clamping part opens up a quarter round shape neck for clamping test pieces termination, and retained part is separated, need to be tightened with bolt, nut during use.The piece fixture of Concrete Material tensile test of the present utility model is compared with existing fixture both domestic and external, the phenomenon that test piece end strain is concentrated is avoided in direct tensile test, and it is encrypted without need for test piece end, so that stretch test result is more accurately and reliably, test specimen axial tension can also effectively be ensured so that load action line overlaps as far as possible with tension test specimen, simple in construction, the advantages that convenient mounting and clamping, there is higher use value.
Description
Technical field
The utility model is related to Concrete Material (fiber concrete, fiber cement-based) tensile property e measurement technology is made
Piece fixture, is directed to Concrete Material and does dynamic tensile experiment and be both avoided that test specimen produced stress concentration, and and can keeps away
Exempt from the phenomenon of generation unbalance stress, the utility model is a kind of piece fixture for Concrete Material tensile test.
Background technology
Concrete Material tensile property is one of its basic mechanical property, and it is research Concrete Material strength theory
An and important component of failure mechanism.The tensile strength of normal concrete is very low, and as fiber is in concrete
Using substantially increasing the tensile capacity of Concrete Material.
Concrete direct tensile test is to obtain the important technology of the series of parameters such as concrete tensile strength, modulus of elasticity
Means, because a variety of difficulty be present in direct tensile test, including：Test specimen pattern, fixture etc..Therefore concrete in uniaxial tensile strength
It is to be obtained by Indirect Tensile Tests or by the empirical formulas of compression strength mostly.But strictly speaking these values are not
The true reflection of concrete tensile strength.
Stretching dynamic to Concrete Material, penetration impact, the existing experimental study of the power performance under drop impact into
Fruit, but be concentrated mainly in the range of middle low strain dynamic rate, and is all mostly Shock Compression Experiments, and for Concrete Material and
Speech, when for impacting with explosive load, the research to its dynamic tensile strength and energy to failure has higher meaning.
In Concrete Material tensile test, difficulty essentially consists in the clamping of test specimen, there is three kinds of folders referred at present
Mode is held, is divided into adhesive type, built-in type and external clamping three basic forms of it, three kinds of methods have the defects of certain.Particularly pair
In fiber cement-based material, its specimen thickness is universal smaller, and built-in type is mainly connected through a screw thread, and is threadedly coupled manufacturing procedure
Complexity, and often inevitably have space, therefore built-in type is not easily accomplished.Therefore mainly use external clamping and adhesive type two
Kind, the former is to compress test specimen by screw thread with the friction power transmission between fixture, above lower platen using test specimen, and the latter utilizes epoxy
Bonding between test specimen carries out power transmission.Under conditions of high strain-rate, external clamping test specimen is easier to produce stress concentration, leads
Fracture is caused often to betide specimen holder position, and adhesive type can make stress transmission uneven, not be very reliable, while also can not be right
Material carries out the tension test under high temperature and tension coupling, therefore the also more and more higher of the requirement to test fixture, existing
The fixture that uses of Concrete Material tensile test complicated, the shortcomings such as clamping inconvenience, in tension be present
Load action line should be made to be overlapped as far as possible with tension test specimen axis as far as possible in experiment, and ensure that test specimen destroys and occur as far as possible
Tensile region.
Utility model content
The purpose of this utility model is to provide a kind of piece fixture for Concrete Material tensile test, and existing
Fixture both domestic and external compare, it is simple in construction, convenient mounting and clamping and effectively avoid stress concentration and discontinuity, have compared with
High use value.
The technical solution of the utility model is：A kind of piece fixture for Concrete Material tensile test, connection
One end of bar 1 is connected with universal testing machine, the other end of connecting rod 1 stretch into inside holder 2 to carry out tensile force plus
Carry；
Connected between upper holder 2 and lower holder 6 by test specimen 4.
Horizontal fastener 5 is equipped with upper holder 2 and lower holder 6, fastener 5 fastens test specimen 4 to lock；
The bottom of upper holder 2 is provided with a quarter round shape neck 3 for the termination of clamping test pieces 4, the end of test specimen 4
It is engaged with a quarter round shape neck 3；
The upper surface of pedestal 7 is provided with vertical bolt, is fixed between pedestal 7 and lower holder 6 by vertical bolt connection；
Test specimen 4 is cylinder or cube；
The utility model has the advantage of：The piece fixture of Concrete Material tensile test of the present utility model with it is existing
Fixture both domestic and external compare, it is simple in construction, effectively prevent test piece end stress concentration phenomenon, and in clamping test specimen,
Only test specimen need to be directly inserted in, the advantages that quite facilitating is installed, there is higher practical value.
Brief description of the drawings
Fig. 1 is the piece fixture overall schematic of Concrete Material tensile test in the present embodiment.
Fig. 2 is the piece fixture left view of Concrete Material tensile test in the present embodiment.
Fig. 3 is the connecting rod schematic diagram in the piece fixture of Concrete Material tensile test in the present embodiment.
Fig. 4 is the neck schematic diagram of retained part on the piece fixture of Concrete Material tensile test in the present embodiment.
Fig. 5,6 are Concrete Material test specimen schematic diagram in the present embodiment.
Fig. 7 is screw bolt and nut schematic diagram in the present embodiment.
Fig. 8 is retained part neck schematic diagram under the piece fixture of Concrete Material tensile test in this example.
In figure：Clamped under the upper holder of 1- connecting rods, 2-, 3- a quarter round shape neck, 4- test specimens, 5- fasteners, 6-
Part, 7- pedestals.
Embodiment
In order to which features described above and advantage of the present utility model can be become apparent, special embodiment below, and coordinate attached
Figure, is described in detail below.
As shown in figures 1-8, the utility model is a kind of piece fixture for Concrete Material tensile test, connecting rod
1 one end is connected with universal testing machine, and the other end of connecting rod 1 is stretched into inside holder 2 carrying out the loading of tensile force；
Connected between upper holder 2 and lower holder 6 by test specimen 4.
Horizontal fastener 5 is equipped with upper holder 2 and lower holder 6, fastener 5 fastens test specimen 4 to lock；
The bottom of upper holder 2 is provided with a quarter round shape neck 3 for the termination of clamping test pieces 4, the end of test specimen 4
It is engaged with a quarter round shape neck 3；
The upper surface of pedestal 7 is provided with vertical bolt, is fixed between pedestal 7 and lower holder 6 by vertical bolt connection；
Test specimen 4 is cylinder or cube；
When using above-mentioned material tensile test fixture, one end of coagulation great soil group test specimen can be put into upper clamping first
In part, then bolt is tightened with nut, and then added the other end of test specimen in lower holder and by the spiral shell of lower holder
Bolt is tightened, and lower holder is connected with pedestal finally by nut.
After being clamped using above-mentioned material tensile test fixture to test specimen, you can pulled up by vertical direction
The connecting rod of upper retained part, start to carry out Concrete Material test specimen test for tensile strength, and obtain corresponding measurement knot
Fruit.
It the foregoing is only preferred embodiment of the present utility model, all impartial changes done according to the scope of the utility model
Change and modify, should all belong to covering scope of the present utility model.
Claims (2)
- A kind of 1. piece fixture for Concrete Material tensile test, it is characterised in that：One end of connecting rod (1) with it is omnipotent Testing machine connects, and the other end of connecting rod (1) stretches into holder (2) inside to carry out the loading of tensile force；It is connected between upper holder (2) and lower holder (6) by test specimen (4)；It is equipped with horizontal fastener (5) on upper holder (2) and lower holder (6), fastener (5) is locking fastening test specimen (4)；The bottom of upper holder (2) is provided with a quarter round shape neck (3) for clamping test pieces (4) termination, test specimen (4) End is engaged with a quarter round shape neck (3)；The upper surface of pedestal (7) is provided with vertical bolt, is consolidated between pedestal (7) and lower holder (6) by vertical bolt connection It is fixed.
- A kind of 2. piece fixture for Concrete Material tensile test according to claim 1, it is characterised in that：Examination Part (4) is cylinder or cube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721083442.2U CN207095976U (en) | 2017-08-28 | 2017-08-28 | A kind of piece fixture for Concrete Material tensile test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721083442.2U CN207095976U (en) | 2017-08-28 | 2017-08-28 | A kind of piece fixture for Concrete Material tensile test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207095976U true CN207095976U (en) | 2018-03-13 |
Family
ID=61540200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721083442.2U Active CN207095976U (en) | 2017-08-28 | 2017-08-28 | A kind of piece fixture for Concrete Material tensile test |
Country Status (1)
| Country | Link |
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| CN (1) | CN207095976U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109781527A (en) * | 2019-02-13 | 2019-05-21 | 滁州职业技术学院 | A kind of test specimen and test method for testing concrete sample tensile strength |
| CN109781526A (en) * | 2019-02-13 | 2019-05-21 | 滁州职业技术学院 | A kind of concrete sample tensile strength test method |
| CN111039615A (en) * | 2019-12-05 | 2020-04-21 | 济南大学 | High-toughness cement-based composite material and preparation method thereof |
| CN111413203A (en) * | 2020-04-27 | 2020-07-14 | 西安建筑科技大学 | Concrete uniaxial tension test fixture and test method |
-
2017
- 2017-08-28 CN CN201721083442.2U patent/CN207095976U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109781527A (en) * | 2019-02-13 | 2019-05-21 | 滁州职业技术学院 | A kind of test specimen and test method for testing concrete sample tensile strength |
| CN109781526A (en) * | 2019-02-13 | 2019-05-21 | 滁州职业技术学院 | A kind of concrete sample tensile strength test method |
| CN111039615A (en) * | 2019-12-05 | 2020-04-21 | 济南大学 | High-toughness cement-based composite material and preparation method thereof |
| CN111413203A (en) * | 2020-04-27 | 2020-07-14 | 西安建筑科技大学 | Concrete uniaxial tension test fixture and test method |
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