CN108827779A - A kind of the compression stress relaxation test device and test method of rubber material - Google Patents
A kind of the compression stress relaxation test device and test method of rubber material Download PDFInfo
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- CN108827779A CN108827779A CN201811061715.2A CN201811061715A CN108827779A CN 108827779 A CN108827779 A CN 108827779A CN 201811061715 A CN201811061715 A CN 201811061715A CN 108827779 A CN108827779 A CN 108827779A
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- sample
- compression stress
- platen
- compression
- stress relaxation
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Classifications
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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
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
-
- 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
- G01N2203/0019—Compressive
Abstract
The invention discloses the compression stress relaxation test devices and test method of a kind of rubber material.The device includes sample compression module and data acquisition module, the former is carrying sample, adjusts sample compression to the functional unit of predetermined decrement or compression ratio, and the latter is the functional unit for acquiring compression stress value corresponding with the time.This method first lies in sample on the supporting surface of sample platen fixing end, adjusting knob is moved by sample compression to predetermined decrement or compression ratio by rotary platen, collecting test time corresponding compression stress value, data processing is carried out again, you can get it sample compression stress relaxation curve and the corresponding stress relaxation rate of different active times.Apparatus structure design is succinct, manipulates convenient for practical, and this method is method of real-time, and test result is accurate；And there is no particular/special requirement to sample shape, it only needs upper and lower surface concordant, smooth, the stress relaxation degree and evolution trend of sample is judged effective and rapid, being particularly suitable for assessment needs the material of long service.
Description
Technical field
The invention belongs to material mechanical performance the field of test technology, and in particular to a kind of compression stress relaxation of rubber material
Test device and test method.
Background technique
With material gene pool building-up work gradually deeply promoting from each level, the performance of material is fully understanded and grasped
Parameter is most important, and applying especially for those needs long service in domain variabilities such as weaponry, aerospace, energy technologys
Advanced function material, it is necessary to before being put into use, the stability of material is assessed, therefore research material is drawn for a long time
Stretch/the performance effect under specific environments such as compression stress load is of great significance.From test philosophy, stress test experiment
It is load under constant deformation to be tested（Load active force thereon）Decaying, but since the measurement of power must pass through material
Deformation reflects, thus should constant deformation measuring force again variation, this is the difficulty of the design of stress relaxation device and manufacture
Point.
Chinese patent literature library discloses Wang Keming's《A kind of compression stress relaxation detection device》
（201620536105.3）, Li Xinyan, Zhang Xiongsheng, Bu Haoran's etc.《Creep stress relaxation test machine》（201330639984.4）,
Shen Mingxue, Li Xinxin, Peng Xudong's etc.《A kind of device for rubber elastomer high-temerature creep test and stress relaxation test》
（201610649869.8）, the apparatus structure that these are used to test rubber material is excessively complicated, volume is larger, it is continuous to obtain
Property online experiment data, it is difficult to realize the long-term behaviour research of rubber material under particular surroundings controlled condition.
Summary of the invention
A technical problem to be solved by this invention is to provide a kind of compression stress relaxation test device of rubber material,
Another technical problem to be solved by this invention is to provide a kind of compression stress relaxation test method of rubber material.
The compression stress relaxation test device of rubber material of the invention, its main feature is that, including：
Sample compression module, for carrying sample, the functional unit of adjusting sample compression to predetermined decrement or compression ratio；Described
Sample compression module includes the mobile adjusting knob of sample platen fixing end, sample platen mobile terminal, sliding rail and platen；The cunning
One end of rail is fixing end, and fixing end is fixedly connected with sample platen fixing end, and the other end of sliding rail is mobile terminal, mobile terminal and
Sample platen mobile terminal is fixedly connected, and platen moves the top that adjusting knob is fixed on sliding rail, and rotary platen moves adjusting knob,
Sample platen mobile terminal is moved up and down along sliding rail；
Data acquisition module, for the functional unit for acquiring compression stress value corresponding with the time；The data acquisition module packet
Include pressure sensor, function setting area and data display screen；The pressure sensor is connected to sample platen fixing end or sample
On product platen mobile terminal, the compression stress of sample is loaded on for real-time monitoring；The data display screen is used for Real time displaying
The stress numerical that sample is loaded under predetermined elongation rate and corresponding time that pressure sensor obtains；The function setting
Area carries out numerical value zero, unit switching and data to the numerical value that pressure sensor obtains and exports.
There is concentric circular scale on the supporting surface of the sample platen fixing end, for sample to be placed in supporting surface center
Heart position.
The sliding rail is closed groove.
Be carved with screw thread on the rotating handle of the mobile adjusting knob of the platen, for monitor sample platen mobile terminal it is mobile away from
From calculating the decrement of sample.
The compression stress relaxation test method of rubber material of the invention includes the following steps：
A. the sample to be measured tailored is lain on the supporting surface of sample platen fixing end；
B. it turns on the power switch, and will starting compression stress value Fa zero；Rotary platen moves adjusting knob, moves sample platen
Moved end is moved down along sliding rail, until just having contacted with the upper surface of sample, is started display compression on data display screen at this time and is answered
Force data；
C. continue the mobile adjusting knob of rotary platen, until by sample compression to predetermined decrement, at this time on data display screen
Compression stress data are denoted as F；After 30min, corresponding compression stress value is denoted as F0, and F0 is that sample is initial under predetermined decrement
Compression stress；
D. continue the position of holding sample platen mobile terminal, while recording time and compression stress value Ft corresponding with the time, directly
To reaching the preset testing time；
E. according to time and compression stress value Ft corresponding with the time, Ft/F0 is calculated separately, obtains the compression stress relaxation of sample
Curve and stress relaxation rate.
Starting compression stress value Fa in the step b can be calculated in step e with non-return-to-zero（Ft-Fa）/（F0-Fa）,
Obtain the compression stress relaxation curve and stress relaxation rate of sample.
The compression stress relaxation test device decoration structure features simple design of rubber material of the invention manipulates, this hair convenient for practical
The compression stress relaxation test method of bright rubber material is real-time by pressure sensor and display screen in entire test process
The variation of compression stress is monitored, during which without taking out sample, avoids data fluctuations caused by the factors such as operating error, it is ensured that
The precision of test result, the judgement of stress relaxation degree and evolution trend to sample is effective and rapid, be particularly suitable for commenting
Estimate the material for needing long service.In addition, according to the actual situation whether urgent specific requirements, can be by flexibly controlling the testing time
It gives and realizes；It is directed to the sample of larger size, then can be given by changing the size of the sample platen module in test device
It realizes；Be directed to the sample of smaller size, then it can be by displacement sensor etc. being added in test device accurately to control sample
The displacement of platen mobile terminal is achieved.Moreover, by reequiping the sample compression module in test device（For example increase sample
Platen cantilever）It is placed in environmental test chamber（Such as temperature field, radiation field）It is interior, it may also be used for test sample is in particular surroundings atmosphere
Compress stress relaxation.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the compression stress relaxation test device of rubber material of the invention；
Fig. 2 is the product schematic diagram of the compression stress relaxation test device of rubber material of the invention；
Fig. 3 is that embodiment 3 tests obtained compression stress relaxation curve；
In figure, 1. data display screen, 2. function is arranged mobile 4. sliding rail of adjusting knob, the 5. sample platen of 3. platen of area and moves
6. sample of moved end, 7. 8. power switch of sample platen fixing end, 9. pressure sensor.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text
Word can be implemented accordingly.It should be appreciated that such as " having ", "comprising" and " comprising " term used herein do not allot one
The presence or addition of a or a number of other elements or combinations thereof.
As shown in Figure 1, 2, the compression stress relaxation test device of rubber material of the invention includes：
Sample compression module, for carrying sample, the functional unit of adjusting sample compression to predetermined decrement or compression ratio；Described
Sample compression module includes the mobile adjusting knob 3 of sample platen fixing end 7, sample platen mobile terminal 5, sliding rail 4 and platen；It is described
One end of sliding rail 4 be fixing end, fixing end is fixedly connected with sample platen fixing end 7, and the other end of sliding rail 4 is mobile terminal,
Mobile terminal is fixedly connected with sample platen mobile terminal 5, and the mobile adjusting knob 3 of platen is fixed on the top of sliding rail 4, and rotary platen moves
Dynamic adjusting knob 3, sample platen mobile terminal 5 is moved up and down along sliding rail 4；
Data acquisition module, for the functional unit for acquiring compression stress value corresponding with the time；The data acquisition module packet
Include pressure sensor 9, function setting area 2 and data display screen 1；The pressure sensor 9 is connected to sample platen fixing end 7
Or on sample platen mobile terminal 5, the compression stress of sample 6 is loaded on for real-time monitoring；The data display screen 1, is used for
The stress numerical that sample 6 is loaded under predetermined elongation rate and corresponding time that Real time displaying pressure sensor 9 obtains；It is described
Function be arranged area 2, to pressure sensor 9 obtain numerical value carry out numerical value zero, unit switching and data export.
There is concentric circular scale on the supporting surface of the sample platen fixing end 7, for sample 6 to be placed in supporting surface just
Center.
The sliding rail 4 is closed groove.
It is carved with screw thread on the rotating handle of the mobile adjusting knob 3 of the platen, for monitoring the movement of sample platen mobile terminal 5
Distance calculates the decrement of sample 6.
The compression stress relaxation test method of rubber material of the invention includes the following steps：
A. the sample to be measured 6 tailored is lain on the supporting surface of sample platen fixing end 7；
B. 8 are turned on the power switch, and will starting compression stress value Fa zero；Rotary platen moves adjusting knob 3, makes sample platen
Mobile terminal 5 is moved down along sliding rail 4, until just having contacted with the upper surface of sample 6, starts to show on data display screen 1 at this time
Compression stress data；
C. continue the mobile adjusting knob 3 of rotary platen, until sample 6 is compressed to predetermined decrement, at this time on data display screen 1
Compression stress data be denoted as F；After 30min, corresponding compression stress value is denoted as F0, and F0 is sample 6 under predetermined decrement
Initial compression stress；
D. continue the position of holding sample platen mobile terminal 5, while recording time and compression stress value Ft corresponding with the time, directly
To reaching the preset testing time；
E. according to time and compression stress value Ft corresponding with the time, Ft/F0 is calculated separately, obtains the compression stress pine of sample 6
Relaxation curve and stress relaxation rate.
Starting compression stress value Fa in the step b can be calculated in step e with non-return-to-zero（Ft-Fa）/（F0-Fa）,
Obtain the compression stress relaxation curve and stress relaxation rate of sample 6.
Embodiment 1
By what is tailored（It tailors as round, square or rectangle etc.）Sample 6 to be measured lies in sample platen fixing end 7
On supporting surface；8 are turned on the power switch, by starting compression stress value Fa zero；Rotary platen moves adjusting knob 3, makes sample pressure
Disk mobile terminal 5 is moved down along sliding rail 4, until just having contacted with the upper surface of sample 6, starts to show on data display screen 1 at this time
Show compression stress data；Continue the mobile adjusting knob 3 of rotary platen, until sample 6 is compressed to predetermined decrement, data at this time
Compression stress data on display screen 1 are denoted as F；After 30min, corresponding compression stress value is denoted as F0, and F0 is sample 6 in pre- level pressure
Initial compression stress under contracting amount；Continue to keep the position of sample platen mobile terminal 5, while recording time and corresponding with the time
Compression stress value Ft is until reach the preset testing time；Export initial data；It is answered according to time and compression corresponding with the time
Force value Ft calculates separately Ft/F0, obtains 6 compression stress relaxation curve of sample and the corresponding stress relaxation rate of different active times,
Carry out the judgement assessment of mechanical property under detected materials long service state.
Embodiment 2
By what is tailored（It tailors as round, square or rectangle etc.）Sample 6 to be measured lies in sample platen fixing end 7
On supporting surface；8 are turned on the power switch, record start compression stress value Fa；Rotary platen moves adjusting knob 3, makes sample platen
Mobile terminal 5 is moved down along sliding rail 4, until just having contacted with the upper surface of sample 6, starts to show on data display screen 1 at this time
Compression stress data；Continue the mobile adjusting knob 3 of rotary platen, until sample 6 is compressed to predetermined decrement, data are aobvious at this time
Compression stress data in display screen 1 are denoted as F；After 30min, corresponding compression stress value is denoted as F0, and F0 is sample 6 in predetermined compression
Initial compression stress under amount；Continue the position of holding sample platen mobile terminal 5, while recording time and pressure corresponding with the time
Stress under compression value Ft is until reach the preset testing time；Export initial data；According to time and compression stress corresponding with the time
Value Ft, calculates separately（Ft-Fa）/（F0-Fa）, can be obtained 6 compression stress relaxation curve of sample and different active times be corresponding
Stress relaxation rate, carry out detected materials long service state under mechanical property judgement assessment.
Embodiment 3
Certain the circular rubbery foam sample 6 tailored is lain on the supporting surface of sample platen fixing end 7；Open electricity
Source switch 8, and will starting compression stress value Fa zero；Rotary platen moves adjusting knob 3, makes sample platen mobile terminal 5 along cunning
Rail 4 moves down, until just having contacted with the upper surface of sample 6, starts to show compression stress number at this time on data display screen 1
According to；Continue the mobile adjusting knob 3 of rotary platen, until sample 6 is compressed to predetermined decrement 50%（It is original by sample compression
The 50% of thickness）, the compression stress data on data display screen 1 are denoted as F at this time；After 30min, corresponding compression stress value is denoted as
F0, F0 are initial compression stress of the sample 6 under predetermined decrement；The position for continuing holding sample platen mobile terminal 5, remembers simultaneously
Record time and compression stress value Ft corresponding with the time are until reach preset testing time 12h；Export initial data；According to when
Between and compression stress value Ft corresponding with the time, find initial compression stress F0, it is corresponding according to different time points in 12h thereafter
Compression stress value Ft, calculates separately Ft/F0, and the compression stress relaxation curve of the detected materials, certain moment pair can be obtained as Fig. 3
The stress relaxation rate answered can be searched on the curve, for example the compression stress relaxation rate of 6h is 20.26%.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
It realizes other modification, for example the shape of device is adjusted, is replaced mechanics sensor to be adapted to higher
Device is connect with computer to be shown as stress relaxation rate, by adjusting knob by program direct-on-line by the material of compressive strength
It is changed to power type etc., therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and example shown and described herein.
Claims (6)
1. a kind of compression stress relaxation test device of rubber material, which is characterized in that including：
Sample compression module, for carrying sample, the functional unit of adjusting sample compression to predetermined decrement or compression ratio；Described
Sample compression module includes sample platen fixing end（7）, sample platen mobile terminal（5）, sliding rail（4）With the mobile adjusting knob of platen
（3）；The sliding rail（4）One end be fixing end, fixing end and sample platen fixing end（7）It is fixedly connected, sliding rail（4）It is another
One end is mobile terminal, mobile terminal and sample platen mobile terminal（5）It is fixedly connected, the mobile adjusting knob of platen（3）It is fixed on sliding rail
（4）Top, the mobile adjusting knob of rotary platen（3）, sample platen mobile terminal（5）Along sliding rail（4）It moves up and down；
Data acquisition module, for the functional unit for acquiring compression stress value corresponding with the time；The data acquisition module packet
Include pressure sensor（9）, function be arranged area（2）And data display screen（1）；The pressure sensor（9）It is connected to sample pressure
Disk fixing end（7）Or sample platen mobile terminal（5）On, sample is loaded on for real-time monitoring（6）Compression stress；The number
According to display screen（1）, it is used for Real time displaying pressure sensor（9）What is obtained loads on sample under predetermined elongation rate（6）Stress
Numerical value and corresponding time；Area is arranged in the function（2）, to pressure sensor（9）The numerical value of acquisition carries out numerical value zero, list
Position switching and data output.
2. the compression stress relaxation test device of rubber material according to claim 1, it is characterised in that：The sample
Platen fixing end（7）Supporting surface on have concentric circular scale, for by sample（6）It is placed in supporting surface center position.
3. the compression stress relaxation test device of rubber material according to claim 1, which is characterized in that the sliding rail
（4）For closed groove.
4. the compression stress relaxation test device of rubber material according to claim 1, it is characterised in that：The platen
Mobile adjusting knob（3）Rotating handle on be carved with screw thread, for monitoring sample platen mobile terminal（5）Mobile distance calculates sample
（6）Decrement.
5. a kind of compression stress relaxation test method of rubber material, which is characterized in that include the following steps：
A. the sample to be measured that will have been tailored（6）Lie in sample platen fixing end（7）Supporting surface on；
B. it turns on the power switch（8）, and will starting compression stress value Fa zero；Rotary platen moves adjusting knob（3）, make sample
Platen mobile terminal（5）Along sliding rail（4）It moves down, until and sample（6）Upper surface just contact, data display screen at this time
（1）On start show compression stress data；
C. continue the mobile adjusting knob of rotary platen（3）, until by sample（6）It is compressed to predetermined decrement, data are shown at this time
Screen（1）On compression stress data be denoted as F；After 30min, corresponding compression stress value is denoted as F0, and F0 is sample（6）In pre- level pressure
Initial compression stress under contracting amount；
D. continue to keep sample platen mobile terminal（5）Position, while recording time and compression stress value Ft corresponding with the time,
Until reaching the preset testing time；
E. according to time and compression stress value Ft corresponding with the time, Ft/F0 is calculated separately, obtains sample（6）Compression stress
Relaxation curve and stress relaxation rate.
6. the compression stress relaxation test method of rubber material according to claim 5, which is characterized in that the step
Starting compression stress value Fa non-return-to-zero in b calculates in step e（Ft-Fa）/（F0-Fa）, obtain sample（6）Compression stress
Relaxation curve and stress relaxation rate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811061715.2A CN108827779A (en) | 2018-09-12 | 2018-09-12 | A kind of the compression stress relaxation test device and test method of rubber material |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811061715.2A CN108827779A (en) | 2018-09-12 | 2018-09-12 | A kind of the compression stress relaxation test device and test method of rubber material |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110108478A (en) * | 2019-05-30 | 2019-08-09 | 华南理工大学 | A kind of system monitoring gas-insulated enclosed switch O-ring seals stress relaxation |
| CN110514373A (en) * | 2019-06-24 | 2019-11-29 | 贵州大自然科技股份有限公司 | A kind of mattress photoelastic evaluation method |
| CN111024932A (en) * | 2019-12-24 | 2020-04-17 | 中国船舶工业系统工程研究院 | Device and method for measuring underwater volume compressibility of rubber material |
| CN111766165A (en) * | 2020-08-07 | 2020-10-13 | 中冶建筑研究总院有限公司 | Prestressed tendon fatigue-stress relaxation test method for simulating actual service state |
| CN114778323A (en) * | 2022-01-05 | 2022-07-22 | 哈尔滨工业大学 | Full-automatic detection device and method for one-dimensional stroke expansion irradiation relaxation |
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| CN110108478A (en) * | 2019-05-30 | 2019-08-09 | 华南理工大学 | A kind of system monitoring gas-insulated enclosed switch O-ring seals stress relaxation |
| CN110514373A (en) * | 2019-06-24 | 2019-11-29 | 贵州大自然科技股份有限公司 | A kind of mattress photoelastic evaluation method |
| CN111024932A (en) * | 2019-12-24 | 2020-04-17 | 中国船舶工业系统工程研究院 | Device and method for measuring underwater volume compressibility of rubber material |
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| CN111766165A (en) * | 2020-08-07 | 2020-10-13 | 中冶建筑研究总院有限公司 | Prestressed tendon fatigue-stress relaxation test method for simulating actual service state |
| CN114778323A (en) * | 2022-01-05 | 2022-07-22 | 哈尔滨工业大学 | Full-automatic detection device and method for one-dimensional stroke expansion irradiation relaxation |
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