CN206593969U - The axial tension test device of cement-base composite material test specimen - Google Patents
The axial tension test device of cement-base composite material test specimen Download PDFInfo
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- CN206593969U CN206593969U CN201720253758.5U CN201720253758U CN206593969U CN 206593969 U CN206593969 U CN 206593969U CN 201720253758 U CN201720253758 U CN 201720253758U CN 206593969 U CN206593969 U CN 206593969U
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- test specimen
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- cement
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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- Y02A30/30—Adapting or protecting infrastructure or their operation in transportation, e.g. on roads, waterways or railways
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Abstract
A kind of axial tension test device of cement-base composite material test specimen, the device includes frame assembly, slidably ball pivot component, frame assembly and steel band；Frame assembly connects slidably frame assembly, slidably frame assembly connected ball hinge component, ball pivot component connection steel band.The utility model advantage is as follows：1. the device is simple to operate, convenient dismounting, cost is low.2. the pre embedded bolt of the device can guarantee that test specimen reduces the irregular fracture of test specimen two ends caused by stress concentration in stretching with the steel disc bonded.3. using flexible constraint, steel band can improve centering without producing end additional bending moment with ball pivot component, effectively eliminate axially eccentric.4. effectively eliminating stress concentration phenomenon, lifting surface area is increased, the resistance to overturning of frame assembly is enhanced.5. the influence damaged under load action to test specimen can be reacted.6. it is connected by LVDT back springing type displacement transducers with steel band, the displacement of tested steel band, the displacement of steel band is also a part for global displacement, it is impossible to ignore test.
Description
Technical field
The utility model belongs to a kind of and reduces the axially eccentric device of test specimen, particularly for cement-base composite material test specimen
Axial tension test.
Background technology
The big Mr. in Wuzhong once pointed out that Composite was the main path of cement-based material high performance, and fiber reinforcement is it
Core.The use of fiber can effectively eliminate cement-based material early-age crack, improve Tensile strength and toughness, and fiber increases
Reinforced concrete or fiber-reinforced mortar are with the raising of fiber production technology and constantly improving in performance for additive product performance
Tremendous development has above been obtained with application.
The existing direct experimental rig for applying axial tensile stress is not applied on a large scale, its main cause:(1)
There is the existing direct experimental rig for applying axial tensile stress complicated, design difficulty of processing height, cost is higher；(2) make
Operation difficulty is higher when being loaded with the existing experimental rig for directly applying axial tensile stress to test specimen, is relatively difficult to ensure in confirmatory test
The axis of tension sample is overlapped with tensile load position, it is difficult to ensure axial tension, and additional bending moment is also difficult to avoid that,
Cause experimental result error larger；（3）In the existing experimental rig for directly applying axial tensile stress, either to test specimen two
End directly clamping still uses pre-embedded bolt method, and tension sample all easily produces stress concentration at stretching end, occurs end and breaks
It is bad, cause stress distribution uneven；（4）The existing direct experimental rig for applying axial tensile stress is to test specimen using spring
Loading stress, under the effect of long-range circumstances factor, the coefficient of elasticity of spring can change, and cause under harsh environmental conditions
In long-term performance test, not expected change occurs for loading stress；（5）The existing experiment for directly applying axial tensile stress
In device, special are required to sample dimensions, supporting corresponding mould is needed, the operation difficulty of shaping is larger.
At present, ordinary test machine is after loading is started, and rigid frame is small only by baffle plate and connecting rod acting surface with testing machine,
Stress is concentrated, and causes stress in framework slightly uneven, then can apply larger additional bending moment to test specimen, and test specimen is also highly susceptible to
Bias destruction.
Chinese patent " a kind of axially eccentric assembling device of reduction tensile test specimen and operating method "（CN105508357A）
A kind of axially eccentric assembling device of reduction tensile test specimen and operating method are disclosed, using to the high binding material pair of test piece end
Claim bond steel disc when, by solve the problems, such as in taping process paste steel disc on circular hole position centering and adhesive material it is uniform
Property and paste flatness the problem of.Although the problem of device solves test specimen shaft core position to a certain extent, it is dismounted
Complexity, once circular hole position is unable to centering during manual operation, bondline thickness control is bad, can produce eccentric tension to test specimen and show
As.
The content of the invention
Utility model purpose：The utility model provides a kind of axial tension test device of cement-base composite material test specimen,
The purpose is to solve cement-base composite material test specimen axle center can not accurately centering, and produce end（It is additional）The problem of moment of flexure, also
The mode of steel disc is bonded using pre embedded bolt and test piece end, it is to avoid cement-base composite material test specimen is destroyed in end.Construction letter
It is single, it is easy to operate, and with displacement dynamic function test..
Technical scheme：Utility model is achieved through the following technical solutions：
A kind of axial tension test device of cement-base composite material test specimen, it is characterised in that：The device includes frame set
Part, slidably ball pivot component, frame assembly and steel band；Frame assembly connects slidably frame assembly, and slidably frame assembly connects
Receive hinge component, ball pivot component connection steel band.
The rod that can be slided up and down on slidably frame assembly is slidably housed, slidably on frame assembly
Bar is provided with the slidably nut of one end of connecting screw rod when using, and is embedded in when the other end of screw rod is used in test specimen.
Slidably frame assembly connects one end of steel disc, is connected when the other end of steel disc is used by binding agent with test specimen.
The both sides of frame assembly, which are equipped with, to be connected with computer and the displacement of test specimen can in real time be monitored by computer
Resistor type displacement sensor, be arranged on when computer is also connected with using test specimen both sides to test specimen carry out displacement measurement LVDT
Linear displacement transducer.
LVDT back springing type displacement transducers are connected with steel band.
Ball pivot component connects steel band by bearing.
Ball pivot component passes through linking arm and bolt connection at the slidably corner of frame assembly.
Advantageous effect：The utility model provides a kind of axial tension test device of cement-base composite material test specimen, this reality
With new mainly for cement-base composite material, the materials such as cement mortar can also be generalized to, cement-base composite material stretching is strong
Degree is low, and the sample dimensions for making test specimen are typically small, based on board-like test specimen and rectangle test specimen, also useful 8-shaped test specimen.
The device includes frame assembly, slidably ball pivot component, frame assembly.Frame assembly both sides are provided with resistance-type displacement
Sensor is connected with computer measures displacement, and its two ends is connected to ball pivot component by linking arm and connected, and ball pivot component one end leads to
Cross bearing and be connected to grip of testing machine with steel band.The grade of steel that steel band is used is A3, and steel band property is stable, and the hardness of steel preferably, has
Toughness, rigidity is not preferably, perishable.Bolt connection can improve the bonding strength between part, it is not easy to occur in junction
Fatigue and crackle.Slidably frame assembly is equipped with rod on main part, and rod is used to connect provided with slidably nut
It is connected on screw rod pre-buried in test specimen.Pre-buried screw rod is using the high material of corrosion-resistant, stainless steel, intensity, and there is screw thread screw rod end.
The mode that slidably frame assembly is also bolted is connected test specimen with test specimen with steel disc by binding agent can be according to experiment institute
It is prepared by the size needed.Test specimen two ends need pre embedded bolt, and its level is made when pre-buried, and buried depth is identical, and by screw thread
Place is screwed with slidably nut 7.Monitoring device is by LVDT back springing types displacement transducer and resistor type displacement sensor and computer
It is connected to form, is connected by LVDT back springing types displacement transducer and resistor type displacement sensor with computer real-time data collection,
Both average values are taken, change in displacement can be accurately estimated, change in displacement is analyzed, dynamic test is realized.The displacement of LVDT back springing types is passed
Sensor and resistor type displacement sensor, the data gathered are to monitor the test specimen degree of impairment under load action.LVDT is returned
The model SDVB20M of bullet formula displacement transducer, the instrument advantage is that wearability is strong, and precision is high.The displacement of LVDT back springing types is passed
Sensor is connected with steel band, the displacement of tested steel band, and the displacement of steel band is also a part for global displacement, it is impossible to ignore test.
The specific advantage of the utility model is as follows：
1. the device is simple to operate, convenient dismounting, cost is low, and sample dimensions can be adjusted as needed, and device can
To reuse, low cost, experimental rig small volume.Each building block it is simple in construction, be easy to processing, can be according to examination during experiment
Position when part needs the adjusting apparatus to assemble.Due to experimental rig small volume, with little need for larger space is taken, experiment is tied
It is easy to storage after beam.
2. the pre embedded bolt of the device can guarantee that test specimen is reduced caused by stress concentration in stretching with the steel disc bonded
The irregular fracture of test specimen two ends, the surrounding of test piece end bonds steel disc, and the mode being bolted is filled with outside stretching
Put connected, tensile stress is evenly distributed, frame assembly can greatly improve the integral rigidity of testing machine.
3. using flexible constraint, steel band can improve centering without producing end additional bending moment with ball pivot component, effectively eliminate
It is axially eccentric, steel disc is connected with alite paste with test piece end, can effectively increase active area during test specimen stretching, reduce test specimen
The stress of end, the probability that reduction test piece end is broken in advance.
4. the bolted steel disc of test piece end is fixed on slidably component with bolt connecting mode at corner, effectively disappear
Except stress concentration phenomenon, lifting surface area is increased, the resistance to overturning of frame assembly is enhanced.
5. the data gathered by LVDT back springing types displacement transducer and resistor type displacement sensor, take its average value accurate
The change of displacement is really monitored in real time, can also react the influence damaged under load action to test specimen.
6. it is connected by LVDT back springing type displacement transducers with steel band, the displacement of tested steel band, the displacement of steel band is also whole
A part for displacement body, it is impossible to ignore test.
Brief description of the drawings：
Fig. 1 is the axial tension test apparatus structure front view of the utility model cement-base composite material test specimen.
Fig. 2 is the axial tension test apparatus structure top view of the utility model cement-base composite material test specimen.
Fig. 3 is slidably circuit theory schematic diagram.
In figure, 1 it is frame assembly, 2 is ball pivot component, 3 is slidably frame assembly, 4 is bearing, 5 is linking arm, 6 is
Screw rod, 7 be slidably nut, 8 be rod, 9 be steel disc, 10 be LVDT linear displacement transducers, 11 be resistance-type displacement
Sensor, 12 be steel band, 13 be test specimen, 14 be LVDT back springing type displacement transducers.
Embodiment：
As shown in figure 1, the utility model provides a kind of axial tension test device of cement-base composite material test specimen, the dress
Put including frame assembly 1, slidably ball pivot component 2, frame assembly 3 and steel band 12；Frame assembly 1 connects slidably frame assembly
3, the slidably connected ball hinge component 2 of frame assembly 3, the connection steel band 12 of ball pivot component 2.
It can slidably be slided equipped with the rod 8 that can be slided up and down on slidably frame assembly on frame assembly 3
Lever 8 is provided with slidably nut 7 of one end of connecting screw rod 6 when using, and the other end of screw rod 6 is embedded in test specimen 13 when using
In.
Slidably frame assembly 3 connects one end of steel disc 9, passes through binding agent and test specimen 13 when the other end of steel disc 9 is used
It is connected.
Can sliding frame component 3 be connected by slidably nut 7 with the screw rod 6 being embedded in test specimen, screw rod 6 is from resistance to
The high material of burn into stainless steel, intensity, steel disc 9 is connected by binding agent with test specimen 13, and the other end of steel disc 9 passes through bolt
The mode of connection is connected with slidably frame assembly 3.
The both sides of frame assembly 1, which are equipped with, to be connected with computer and the displacement of test specimen 13 can in real time be supervised by computer
The resistor type displacement sensor 11 of control, test specimen both sides are arranged on when computer is also connected with using carries out displacement measurement to test specimen
LVDT linear displacement transducers 10, take both gather statistical average carry out displacement dynamic test ensure monitoring result can
By property.
LVDT back springing types displacement transducer 14 is connected with steel band 12, the displacement for tested steel band.
Ball pivot component 2 connects steel band 12 by bearing 4, and steel band 12 belongs to flexible constraint.
Ball pivot component 2 passes through linking arm 5 and bolt connection at the slidably corner of frame assembly 3.
The utility model is described in further details below in conjunction with the accompanying drawings：
As illustrated in fig. 1 and 2, the utility model is mainly for cement-base composite material, and the both sides of frame assembly 1 are provided with resistance-type
Displacement transducer 11 is connected with computer measures displacement, and its two ends is connected to ball pivot component 2 by linking arm 5 and connected, ball pivot group
The one end of part 2 is connected to grip of testing machine by bearing 4 and steel band 12；
Slidably frame assembly 3 is equipped with rod 8 on main part, and rod 8 is used to connect provided with slidably nut 7
It is connected on screw rod 6 pre-buried in test specimen；Mode that slidably frame assembly 3 is also bolted and steel disc 9 by binding agent with
Test specimen 13 is connected.Pre-buried screw rod 6 is using the high material of corrosion-resistant, stainless steel, intensity, and there is screw thread screw rod end.Bolt connection
The bonding strength between part can be improved, it is not easy to fatigue and crackle occur in junction.
The grade of steel that steel band 12 is used is A3, and steel band property is stable, and preferably, flexible, rigidity is not preferably, perishable for the hardness of steel
Erosion.
Test specimen 13 can be according to needed for experiment size prepared.
The two ends of test specimen 13 need pre embedded bolt 6, and its level is made when pre-buried, and buried depth is identical, and by screw thread and slidably
Nut 7 is screwed.
Monitoring device is connected to form by LVDT linear displacement transducers 10 and resistor type displacement sensor 11 with computer, when
When testing machine starts stretching, test specimen 13 is due under tension, it may occur that displacement, passes through LVDT linear displacement transducers 10 and resistance
Formula displacement transducer 11 is connected real-time data collection with computer, takes both average values, can accurately estimate change in displacement, analyzes
Change in displacement, realizes dynamic test.
LVDT linear displacement transducers 10 and resistor type displacement sensor 11, the data gathered are made to monitor load
The degree of impairment of test specimen 13 under.
The model SDVB20M of LLVDT linear displacement transducers 10, the instrument advantage is that wearability is strong, and precision is high.
LVDT back springing types displacement transducer 14 is connected with steel band 12, the displacement of tested steel band, and the displacement of steel band is also overall
A part for displacement, it is impossible to ignore test.
Knot illustrates use process of the present utility model below:
According to the requirement of experiment, cement-base composite material, and the size empirically required are prepared, cement base composite wood is made
Expect test specimen 13.
Cement-base composite material test specimen 13 is put into frame assembly 1, the two ends of cement-base composite material test specimen 13 are pre-buried
Screw rod 6, and do not produced with binding agent when the surrounding bonding steel disc 9 at its two ends ensures cement-base composite material test specimen 13 in stretching
Cause trouble portion（It is additional）Moment of flexure, it is to avoid cement-base composite material test specimen 13 is destroyed in end.
Pre embedded bolt 6 will be from the high material of corrosion-resistant, stainless steel, intensity, and there is screw thread screw rod end.
The position of rod 8 makes it parallel with the burial place of pre embedded bolt 6 in regulation frame assembly 3, and can slide
The alignment rotary nut 7 of screw rod 6 of slidably nut 7 in lever 8 screws it.
Steel disc 9 is fixed on slidably frame assembly 3 in bolted mode, the overall steady of frame assembly 1 is improved
It is qualitative.
Slidably frame assembly 3 is connected by linking arm 5 with ball pivot component 2, is connected using the bolted mode in corner,
Improve the intensity of structure interconnection.
The bearing 4 that ball pivot component 2 is installed can be better connected to steel band 12, and steel band 12 is connected to experiment by fixture
Machine, can be such that test specimen 13 is subjected to displacement in certain space using flexible constraint, when test specimen 13 is placed into frame assembly 1
Afterwards, if axle center is unable to centering, axle center effectively centering can be enable by constantly adjusting the direction of flexible constraint, axle is eliminated
To bias.
Resistor type displacement sensor 11 is pasted onto on two body side frames parallel with the long side of test specimen 13 of frame assembly 1, by electricity
Resistive displacement transducer 11 is connected with computer, can be with real-time testing.
LVDT linear displacement transducers 10 are joined directly together with test specimen 13, carry out displacement measurement to test specimen 13, both are gathered
Data average, more accurately contraposition shift-in Mobile state test.
LVDT back springing types displacement transducer 14 is connected with steel band 12, utilizes the tested steel band of LVDT back springing types displacement transducer 14
Displacement, the displacement of steel band is also a part for global displacement, it is impossible to ignore test, and such experimental data is more accurate.
Claims (7)
1. a kind of axial tension test device of cement-base composite material test specimen, it is characterised in that：The device includes frame assembly
（1）, ball pivot component（2）, slidably frame assembly（3）And steel band（12）；Frame assembly（1）Connect slidably frame assembly（3）,
Slidably frame assembly（3）Connected ball hinge component（2）, ball pivot component（2）Connect steel band（12）.
2. the axial tension test device of cement-base composite material test specimen according to claim 1, it is characterised in that：It can slide
Dynamic frame assembly（3）It is upper that the rod that can be slided up and down on slidably frame assembly is housed（8）, rod（8）
Provided with connecting screw rod when using（6）One end slidably nut（7）, screw rod（6）The other end be embedded in test specimen when using
（13）In.
3. the axial tension test device of cement-base composite material test specimen according to claim 1 or 2, it is characterised in that：
Slidably frame assembly（3）Connect steel disc（9）One end, steel disc（9）The other end when using by binding agent and test specimen（13）
It is connected.
4. the axial tension test device of cement-base composite material test specimen according to claim 1, it is characterised in that：Framework
Component（1）Both sides equipped with being connected with computer and can be by computer to test specimen（13）The resistance that is monitored in real time of displacement
Formula displacement transducer（11）, be arranged on when computer is also connected with using test specimen both sides to test specimen carry out displacement measurement LVDT it is straight
Linear movement pick-up（10）.
5. the axial tension test device of cement-base composite material test specimen according to claim 1, it is characterised in that：
LVDT back springing type displacement transducers（14）With steel band（12）It is connected.
6. the axial tension test device of cement-base composite material test specimen according to claim 1, it is characterised in that：Ball pivot
Component（2）Pass through bearing（4）Connect steel band（12）.
7. the axial tension test device of cement-base composite material test specimen according to claim 1, it is characterised in that：Ball pivot
Component（2）Pass through linking arm（5）With slidably frame assembly（3）Corner at bolt connection.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720253758.5U CN206593969U (en) | 2017-03-16 | 2017-03-16 | The axial tension test device of cement-base composite material test specimen |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720253758.5U CN206593969U (en) | 2017-03-16 | 2017-03-16 | The axial tension test device of cement-base composite material test specimen |
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| CN206593969U true CN206593969U (en) | 2017-10-27 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106932276A (en) * | 2017-03-16 | 2017-07-07 | 沈阳工业大学 | The axial tension test device of cement-base composite material test specimen |
| CN107831064A (en) * | 2017-11-23 | 2018-03-23 | 大连理工大学 | A kind of vertical tensile test apparatus containing tencel cloth fixture |
| CN108267365A (en) * | 2017-12-21 | 2018-07-10 | 中国水利水电科学研究院 | The test equipment and method of concrete tensile strength under a kind of difference curing condition |
| CN113390722A (en) * | 2021-06-23 | 2021-09-14 | 济南恒瑞金试验机有限公司 | Tensile strength testing machine and method for flexible protective net of side slope |
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2017
- 2017-03-16 CN CN201720253758.5U patent/CN206593969U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106932276A (en) * | 2017-03-16 | 2017-07-07 | 沈阳工业大学 | The axial tension test device of cement-base composite material test specimen |
| CN106932276B (en) * | 2017-03-16 | 2024-02-23 | 沈阳工业大学 | Axial tensile test device of cement-based composite material test piece |
| CN107831064A (en) * | 2017-11-23 | 2018-03-23 | 大连理工大学 | A kind of vertical tensile test apparatus containing tencel cloth fixture |
| CN108267365A (en) * | 2017-12-21 | 2018-07-10 | 中国水利水电科学研究院 | The test equipment and method of concrete tensile strength under a kind of difference curing condition |
| CN108267365B (en) * | 2017-12-21 | 2020-04-03 | 中国水利水电科学研究院 | Test equipment and method for tensile strength of concrete under different curing conditions |
| CN113390722A (en) * | 2021-06-23 | 2021-09-14 | 济南恒瑞金试验机有限公司 | Tensile strength testing machine and method for flexible protective net of side slope |
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