CN105445116B - A kind of polymeric material room high temperature multiaxis circulation test device - Google Patents
A kind of polymeric material room high temperature multiaxis circulation test device Download PDFInfo
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- CN105445116B CN105445116B CN201511031128.5A CN201511031128A CN105445116B CN 105445116 B CN105445116 B CN 105445116B CN 201511031128 A CN201511031128 A CN 201511031128A CN 105445116 B CN105445116 B CN 105445116B
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- temperature
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- polymeric material
- multiaxis
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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
- G01N3/18—Performing tests at high or low temperatures
Abstract
The invention discloses a kind of polymeric material room high temperature multiaxis circulation test device, it is used cooperatively to MTS universal testing machines and based on the related three-dimensional whole field strain measurement system DIC of image, sample 5 with special shape is installed together and clipped on MTS clamp for universal testing machine with resistive heater 17 and thermocouple probe 16, and the temperature through the Control Assay 5 of temperature control component 6 is tested；Studied available for the circular deformation behavior of polymeric material at different temperatures is implemented.Multiaxis circular deformation behavior research of the present invention for polymeric material at different temperatures provides a kind of testing equipment, the three-dimensional whole field strain-responsive of specimen surface, the integrality for being measured as contactless DIC methods and being effectively guaranteed specimen surface of strain can be obtained by DIC methods.Temperature control component is connected with MTS control systems, and MTS control systems are connected with DIC control systems, has reached the purpose of synchronous data sampling.
Description
Technical field
The invention belongs to the multiaxis ratchet of polymeric material mechanics performance testing technology field, especially polymeric material or
Field is tested in fatigue behaviour.
Background technology
In recent decades, for polymeric material because it has a good mechanical mechanics property, light, good toughness is transparent to wait spy
Put and be widely used in machinery, medical treatment, aviation, automobile and other industries.Many scholars are to various common engineering polymers
Material carries out substantial amounts of experiment and the research of theoretical side.Due to as engineering component composition material under arms during necessarily pass through
Acted on by a variety of loads and temperature, therefore the deformational behavior to material under different temperatures under different loading paths
Design and safety evaluatio of the experimental study to component have very important meaning.Some scholars also carried out the examination of correlation at present
Test, but existing test method there are many deficiencies：
1) traditional experiment be when obtaining different temperatures by sample being placed in a closed environmental cabinet, strain
Either response is converted by displacement and the response of corner with reference to the physical dimension of sample, or sample is snapped into by multiaxis extensometer
Upper acquisition, the not high the latter of the former precision can damage to specimen surface causes sample premature failure.
2) traditional test method can not obtain the evolution of the strain field of specimen surface, particularly will destroy neck in sample
During contracting, traditional strain measurement method can not catch the logarithmic strain of necked-in region.
The content of the invention
In view of above-mentioned prior art deficiency, the purpose of the present invention is to establish one kind to be based on MTS universal testing machines and DIC
Multiaxis circulation test device of the polymeric material of three-dimensional whole field strain measurement system platform under different temperatures environment.Make to be tested
Sample can be warming up to test temperature in open environment and keeping temperature is constant, so as to easily utilize DIC systems to survey
Measure the strain of specimen surface；It is convenient for gathering and handling test data by the association between each system.
The purpose of the present invention is realized by following means.
A kind of polymeric material room high temperature multiaxis circulation test device, for being answered with MTS universal testing machines and the whole audience
Become measuring system DIC and coordinate the multiaxis circular deformation behavior experiment of implementation polymeric material at different temperatures, it is characterised in that,
Sample 5 with special shape is installed together with resistive heater 17 and thermocouple probe 16 and clips to MTS universal material testings
On machine clamp, the temperature through the Control Assay 5 of temperature control component 6 is tested；The controlled loading path of MTS controllers 2 and collecting temperature
And force signal, DIC control systems 4 control camera 3 to gather the surface image of sample 5 and the reprocessing analysis for straining.
The sample 5 is hollow dumb-bell shape light-wall pipe；Upper and lower two steel plugs 12 and 13, upper plug head 12 have three to run through
Aperture, there is heating wires 15 and thermocouple wire 14 to pass through in aperture；There are a hot water radiation wire 17 and a heat in the lower end of upper plug head 12
Thermocouple probe 16 is respectively used to heating and thermometric；The length sum of two steel plugs is less than the length of sample 5, plug and sample
After assembling, the position that plug is not inserted at the middle part of sample 5 forms the tested section 19 of sample, and it is tubulose that sample, which is tested section 19, its
Hollow space is used to hold heat-conducting medium, and resistive heater 17 and thermocouple probe 16 will be immersed in heat-conducting medium；Temperature control group
Part 6 controls the break-make of heated current to realize temperature control.
Using the structure of the present invention, polymeric material sample 5 is processed to dumbbell shaped light-wall pipe, and lower end cap 13 is by sample 5
Lower end is blocked, and it is to ensure that the heat-conducting medium (water or oil) in sample does not spill and provides enough rigidity and causes sample that it, which is acted on,
Do not pressed from both sides by grip of testing machine flat；There are three apertures through its length direction arranged side by side in upper plug head 12, for current supply line 15
Penetrated with thermocouple wire 14, wire 15 is on a resistive heater 17 is connected to through after upper plug head 12；Thermocouple wire 14 is worn
Upper plug head 12 is crossed to connect on a K-type thermocouple probe 16 afterwards；During work, heat after being powered on hot water radiation wire 17, heat
Being transmitted to sample and being tested in section heat-conducting medium makes heat-conducting medium heat up；Temperature controller monitors heat conduction in real time by thermocouple probe 16
The temperature of medium, when temperature reaches the target temperature value of temperature controller setting, temperature controller is signaled to solid-state relay disconnection
Electric current on hot water radiation wire；When the temperature of heat-conducting medium falls below the target temperature value set on temperature controller, temperature controller
On be signaled to solid-state relay and switch on power and heated to hot water radiation wire 17, be situated between with this loop control so as to reach control heat conduction
The temperature of matter is in a certain assigned temperature value.Sample of the heat-conducting medium full of sample 5 is tested intersegmental part, so as to sample inner surface
Temperature is consistent with the temperature of heat-conducting medium, causes the heat inside sample to be spread toward outside from thermal diffusion effect, adds so as to reach
The purpose of heat examination sample；Post an outer thermocouple probe 18 and be used to gather and monitor the temperature of specimen surface in the outside of sample testing section
Degree.Sample surfaces externally and internally has certain temperature difference, and the size of the temperature difference is relevant with environment temperature with the thickness of sample, but as long as
Sample wall thickness is sufficiently small, and temperature difference can is ignored；
The temperature that the invention can heat is relevant with used heat-conducting medium, when it is heat-conducting medium to use water, heating
The boiling temperature of water can not be heated beyond；When using vegetable oil as heat-conducting medium, because the boiling temperature of oil is higher than water very
More, heating-up temperature can reach 200 degrees centigrades, and for polymeric material, the temperature of 100 degrees centigrade or so is
The operating temperature limit of included most of materials, therefore the heating apparatus of the invention disclosure satisfy that the height of most of polymeric material
Warm multiaxial experiment requirement.
Brief description of the drawings：
The overall structure diagram of system described in Fig. 1 experimental rigs of the present invention.
The assembling schematic diagram of the samples of Fig. 2 experimental rigs of the present invention, plug and resistive heater.
The uniaxial stress-strain curve of a certain polymeric material that Fig. 3 experimental rigs of the present invention measure at different temperatures.
Fig. 4 test methods of the present invention measure the strain-responsive result under Multiaxial stress path clustering.
Embodiment
Below by accompanying drawing, the device of the present invention is described in further detail.
Fig. 1 gives the whole system schematic diagram of the invention test method, and whole system is mainly made up of three major parts,
MTS testing machines 1, DIC whole audience strain measurement system 4 and temperature-controlling module 6 respectively；The course of work is as follows：Dc source is used for
Power and heat to resistive heater, solid-state relay is used for break-make heated current, and two temperature controllers are respectively used to control heat conduction to be situated between
The temperature of heat-conducting medium inside sample and sample are become face by the temperature and monitoring specimen surface temperature, two transmitters of matter respectively
Temperature is sent to MTS control systems 2；The camera 3 of DIC systems is used for by the deformation process of control system captured in real-time sample should
The post processing of change.
Fig. 2 gives the geometry and the structure of upper plug head 12 and lower end cap 13 of sample 5, and the He of resistive heater 17
Two locations of thermocouple 16 and 18, and the schematic diagram after all parts assembling, as shown in Figure 2 by each widget
It can be attached on the fixture of MTS testing machines and be tested after installation.
What Fig. 3 gave the experiment that is carried out with the device to a certain polymeric material (makrolon) under different temperatures should
Stress-strain curve, its result are consistent with the result rule that literature query arrives.
Fig. 4 gives carries out stress control to a certain polymeric material (makrolon) with apparatus of the present invention under 65 degrees Celsius
The strain-responsive result of disproportional multiaxis sample processed, it can be seen that the obvious ratcheting of strain-responsive, with expected result one
Cause.
Application Example
This example test polymeric material be makrolon, in engineering application when in, its operating temperature is generally below
100 degrees Celsius, therefore sample 5 can be made with makrolon material and carry out verification experimental verification invention using water as heat-conducting medium 19
Validity.
After carefully connecting the wire in the way of Fig. 1, the experiment of two classes is carried out, the first kind is the uniaxial tension unloading under different temperatures
Experiment, install after sample 5 and the target temperature of temperature controller 8 to be first set to the test temperature specified and keeps constant temperature 10/allow
Sample reaches equalized temperature, and then MTS control systems 2 send instruction and sample is stretched, at the same time DIC control systems 4
Send the frequency shooting image that instruction allows camera 3 to set.Carried after the completion of experiment in DIC control systems 4 with system
Analysis software, which is post-processed, obtains stress-strain diagram；New sample is changed successively, is carried out same operation, is simply set
Different target temperature values, the stress-strain diagram under different temperatures is just obtained, result of the test has been presented in Fig. 3, through analysis
The result meets rule.
The experiment of second class is Multiaxial stress control cyclic test, the method same with first kind installation sample and design temperature
Afterwards, tested with MTS control systems establishment multijoint control program, the result of strain-responsive is as shown in figure 4, due to disproportional
Multiaxial stress control has nonzero mean stress in the axial direction, so as to which the response power of strain sees obvious ratcheting, the knot
Fruit meets rule.
Have by the multiaxis cyclic test method under the polymeric material different temperatures of the checking surface present invention of the example
Imitate feasible.
Claims (4)
1. a kind of polymeric material room high temperature multiaxis circulation test device, for implementing polymeric material at different temperatures more
Axle circular deformation behavior is tested, it is characterised in that the sample (5) and resistive heater (17) and thermocouple with special shape are visited
Head, which is installed together, to be clipped on MTS clamp for universal testing machine, and the temperature through temperature control component (6) Control Assay is tested；
MTS controllers (2) controlled loading path and collecting temperature and force signal, DIC control systems control camera (3) collection sample
Surface image and the reprocessing analysis for straining；
The sample (5) is hollow dumb-bell shape light-wall pipe；Upper and lower two steel plugs, upper plug head (12) and lower end cap (13), on
Plug (12) has three apertures run through, has heating wires (15) and thermocouple wire (14) to pass through in aperture；The lower end of upper plug head
There are a resistive heater (17) and a thermocouple probe (16) to be respectively used to heating and thermometric；The length sum of two steel plugs
Less than the length of sample, after plug and sample assembling, the position for not inserting plug in the middle part of sample (5) forms the tested section of sample
(19) it is tubulose that, sample, which is tested section (19), and its hollow space is used to hold heat-conducting medium, by resistive heater (17) and thermoelectricity
Even probe (16) is placed in heat-conducting medium；The break-make of temperature control component (6) control heated current realizes temperature control.
2. high temperature multiaxis circulation test device in polymeric material room according to claim 1, it is characterised in that the heat conduction
Medium is water or oil.
3. high temperature multiaxis circulation test device in polymeric material room according to claim 1, it is characterised in that temperature control component
(6) test temperature controlled is room temperature to the arbitrary temp value between the boiling temperature of heat-conducting medium.
4. high temperature multiaxis circulation test device in polymeric material room according to claim 1, it is characterised in that described heat
Thermocouple probe (16) is located inside sample；Also include outer thermocouple probe (18), section surface is tested positioned at sample；Internally
Thermocouple probe (16) is used for the temperature for controlling heat-conducting medium, and outer thermocouple probe (18) is used for monitoring sample external skin temperatures
Change to judge whether temperature reaches balance.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201511031128.5A CN105445116B (en) | 2015-12-31 | 2015-12-31 | A kind of polymeric material room high temperature multiaxis circulation test device |
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| CN201511031128.5A CN105445116B (en) | 2015-12-31 | 2015-12-31 | A kind of polymeric material room high temperature multiaxis circulation test device |
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| CN105445116A CN105445116A (en) | 2016-03-30 |
| CN105445116B true CN105445116B (en) | 2018-01-05 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106525566A (en) * | 2016-11-14 | 2017-03-22 | 西南交通大学 | Shape-memory alloy thermal-mechanical coupled multiaxial cyclic deformation experimental device |
| CN109030552B (en) * | 2018-07-10 | 2024-03-08 | 西南交通大学 | Thermoelectric parameter testing device and system |
| CN111337363B (en) * | 2020-03-30 | 2022-04-05 | 哈尔滨工程大学 | Device and method for testing performance of thermoelectric material |
| CN113820203B (en) * | 2021-10-13 | 2023-07-21 | 中国航发北京航空材料研究院 | Device and method for double-sided temperature difference tensile test |
| CN114166885A (en) * | 2021-12-02 | 2022-03-11 | 华东理工大学 | Heating system for metal sheet bulging test |
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| CN104142273A (en) * | 2014-08-20 | 2014-11-12 | 攀钢集团攀枝花钢铁研究院有限公司 | Metal material low-temperature tensile test device and test method |
| CN104215521A (en) * | 2014-09-11 | 2014-12-17 | 中国科学院金属研究所 | Thermo-mechanical-environmental coupling effect testing device and application from room temperature to ultrahigh temperature |
| CN105181734A (en) * | 2015-09-25 | 2015-12-23 | 西南交通大学 | Shape memory alloy thermal mechanical fatigue test device |
| CN205538493U (en) * | 2015-12-31 | 2016-08-31 | 西南交通大学 | Polymeric material room high temperature multiaxis circulation test device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2935801B1 (en) * | 2008-09-08 | 2012-11-23 | Arkema France | METHOD FOR DETERMINING THE FATIGUE HOLD OF A POLYMERIC COMPOSITION |
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| CN104142273A (en) * | 2014-08-20 | 2014-11-12 | 攀钢集团攀枝花钢铁研究院有限公司 | Metal material low-temperature tensile test device and test method |
| CN104215521A (en) * | 2014-09-11 | 2014-12-17 | 中国科学院金属研究所 | Thermo-mechanical-environmental coupling effect testing device and application from room temperature to ultrahigh temperature |
| CN105181734A (en) * | 2015-09-25 | 2015-12-23 | 西南交通大学 | Shape memory alloy thermal mechanical fatigue test device |
| CN205538493U (en) * | 2015-12-31 | 2016-08-31 | 西南交通大学 | Polymeric material room high temperature multiaxis circulation test device |
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