CN106442124A - Shape-memory alloy material fatigue performance test system in electricity-thermal coupling field - Google Patents
Shape-memory alloy material fatigue performance test system in electricity-thermal coupling field Download PDFInfo
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- 238000010168 coupling process Methods 0.000 title abstract description 13
- 238000005859 coupling reaction Methods 0.000 title abstract description 13
- 238000011056 performance test Methods 0.000 title abstract 3
- 238000012360 testing method Methods 0.000 claims abstract description 31
- 238000001816 cooling Methods 0.000 claims abstract description 16
- 239000002184 metal Substances 0.000 claims description 18
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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
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/066—Special adaptations of indicating or recording means with electrical indicating or recording means
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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
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
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- 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
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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- 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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0617—Electrical or magnetic indicating, recording or sensing means
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- 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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/0641—Indicating or recording means; Sensing means using optical, X-ray, ultraviolet, infrared or similar detectors
- G01N2203/0647—Image analysis
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Abstract
The invention discloses a shape-memory alloy material fatigue performance test system in the electricity-thermal coupling field. The test system comprises a power supply system, a camera system, a temperature acquisition system and a control system; the camera system comprises a camera box with a viewfinder frame, a lighting source, an industrial camera and a camera tripod; the temperature acquisition system comprises a temperature thermocouple and a temperature acquisition card; the control system comprises a time relay and a computer; the shape-memory alloy material is subjected to current loading through the power supply; conduction time of a tested sample and a cooling fan are controlled independently through the time relay. By the arrangement, replacement of the related shape-memory alloy material under the action of current and joule thermal coupling and monitoring of the temperature can be realized, displacement and temperature data of the previous or a plurality of mark points of the monitored sample can be acquired, and the test system is suitable of fatigue performance test of the characterized shape-memory alloy material under the electricity-thermal coupling field.
Description
Technical field
The present invention relates to the precision actuation field of the Mechanics Performance Testing of functional material and intellectual material is and in particular to one kind
Function fatigue behaviour under electric current and Joule heat coupling for the shape memory alloy material, service reliability, microscopic structure are drilled
Change the test system of process evaluation.
Background technology
Shape memory alloy material can heat up after suitable " training " under conditions of not having external force intervention
The reversible macroscopic deformation accompanying with phase transition process with generation in temperature-fall period, thus be widely used in navigating as intellectual material
The every field such as empty space flight, mechanical engineering, biomedicine.This reversible macroscopic deformation of shape memory alloy material comes from material
Internal stress field, this internal stress field can cause by the dislocation producing inside " training " process in which materials, also can be by " training " process
The tiny precipitated phase with specific orientation that middle material internal produces leads to.However, when electric current is through out-of-date thermogenetic by joule
Temperature field long term, when shape memory alloy material, will gradually produce as long in dislocation multiplication, precipitated phase in material internal
The microscopic structure change such as big, shows as the drift of phase transition temperature or the decline of shape memory response rate, i.e. marmem material
The function fatigue behaviour of material.This allows for understanding and grasping shape memory alloy material in various physical fields (inclusion electric field, temperature
Field, stress field, remaining external carbuncle field, internal stress field etc.) Variation Features of deformation that produced by phase transformation in long-acting process
Become sign shape memory alloy material function fatigue behaviour and the emphasis of forecast function fatigue life with rule.
At present, the component major part being made up of shape memory alloy material is work during the alternating temperature caused by heat transfer
Make, but some components (as shape memory artificial anal sphincter) using under specific condition are then needed be energized
Work in journey.Simultaneously although there being part to pass through during shape memory alloy material, its phase transformation and deformation behavior to be produced with regard to electric current
The research of impact, but the fresh long-term impact being related to the phase transformation on shape memory alloy material for the electric current and deformation less.Especially needed finger
Go out, the impact to material for the electric current is many, including electromigration, electroluminescent moulding and electroluminescent Joule heat etc., no matter which side
Face all can produce the impact of varying degree thus changing phase transformation and the deformation of material to the microscopic structure of shape memory alloy material
Behavior.During life-time service, electric current and Joule heat coupling more can make to the summation of shape memory alloy material
Generation be different from the fatigue behaviour of heat transfer load mode, show as Shape Memory Alloy member operating temperature is interval and work
Make displacement to change during life-time service.It is tired that this allows for shape memory alloy material function under electric-thermal coupled field
The quality of labor performance becomes the intelligent construction material of selection, estimates material (or component) life-span and analysis of material (or component) inefficacy side
The important indicator of formula.Therefore, for a long time, stably, synchronously record its work in the case that Shape Memory Alloy member is energized
Displacement and temperature change become the important step characterizing and evaluating its function fatigue behaviour.
However, as a kind of atypical mechanical test method, in practical study and test job, there is no and can carry out
For a long time, the experimental technique of the function such as real-time monitoring, system log data and test system.It is thus desirable to designing a kind of new experiment
Method and test system characterizing the function fatigue behaviour of shape memory alloy material, this system should comprise displacement acquisition device,
Temperature collecting device and be electrified for a long time required control system.Common at present displacement transducer (includes contact and non-connects
Touch displacement transducer) mostly can only obtain the change in displacement of a point on monitored sample, such as need to measure same sample simultaneously
The displacement data of upper multiple point, needs to arrange multiple displacement transducers.This not only can greatly increase cost of manufacture, and is unfavorable for
The stability of system longtime running.In recent years, imaging method was directly perceived, comprehensive, stable due to having, and was more and more used
In characterizing the size of monitored sample and change in displacement, and can simultaneously in measuring samples multiple points displacement data, be especially suitable for
For solving the technical problem of the present invention.
In sum, design is a kind of steadily in the long term, be easy to operation, can monitor shape note using imaging system real-time synchronization
Recalling displacement under electric current and Joule heat coupling for the alloy material and the test system of temperature change is that this area is urgent at present
The technical issues that need to address, thus reach research marmem function fatigue behaviour, Indirect evaluation microstructure evolution
Process and the purpose of forecast function fatigue life.
Content of the invention
Present invention aim to overcome that the problem that prior art exists, there is provided a kind of directly perceived, show comprehensively, in real time and
Shape memory alloy material fatigue property test system in the electric-thermal coupled field of monitoring shape memory alloy material.
For achieving the above object, the present invention employs the following technical solutions：
Shape memory alloy material fatigue property test system in electric-thermal coupled field：Including electric power system, photography system
System, temperature acquisition system, control system and monitor station；Electric power system is mainly power supply；Camera chain includes carrying viewfinder
Shot box, lighting source and industrial camera；Temperature acquisition system includes temperature thermocouple and temperature acquisition card；Control system
Including the time relay and computer；Monitor station includes sample stage and metal column；
Sample stage is provided with two metal columns, the monitored sample two ends of tape label point respectively with sample stage on two gold
Belong to post to be connected, a pole of a piece connection power supply of two metal columns, another pole of power supply is connected with the time relay,
Another of the time relay and two metal columns is connected；Sample stage is arranged in shot box, just the viewfinder to shot box；Take the photograph
In shadow case, viewfinder upper left side and upper right side are respectively provided with two lighting sources；Just the left and right sides of sample stage is divided on shot box
Not equipped with two cooling fans；Two cooling fans are connected in series, and one end connects a pole of power supply, and the other end Connection Time continues
Electrical equipment；Industrial camera is just to viewfinder and monitored sample；Temperature thermocouple is attached on monitored sample；Temperature thermocouple is even
Jointing temp capture card；Industrial camera and temperature acquisition card connect computer.
For realizing the object of the invention further it is preferable that described industrial camera is arranged on camera foot stool, described photograph
Camera foot stool height adjustable, to obtain preferable shooting quality.
Preferably, described shot box is made up of the lighttight acrylic board of black.
Preferably, described power supply is D.C. regulated power supply.
Preferably, described lighting source is the photography luminaire of 5500K colour temperature.
Preferably, described camera foot stool top tape ball-shaped cloud platform, makes industrial camera adjustable angle.
Preferably, described temperature thermocouple is the special thin K-type thermocouple of 80 μm of diameter.
Preferably, described temperature thermocouple by high temperature resistant heat insulation adhesive tape sticking described shape memory alloy material table
Face.
Preferably, the color of the labelling point on described shape memory alloy material is clear and legible relative to surrounding.
The time relay is on-delay type and need not be connected with computer.
With respect to prior art, the invention has the advantages that：
1) present invention can achieve the shape memory alloy material test of function fatigue behaviour and table under electric-thermal coupled field
Levy.Show and monitor the position of several interested position on shape memory alloy material intuitively, comprehensively, in real time by imaging method
Move change, compensate for the unicity of traditional displacement characterizing method.
2) present invention passes through to integrate temperature and displacement data, characterizes shape memory alloy material in electric current and Joule heat coupling
Temperature change under cooperation and the Changing Pattern of the deformation being produced by phase transformation, Indirect evaluation microstructure evolution process, thus
There is provided foundation for function fatigue life under electric-thermal coupled field for the further predicting shape memory alloy material.
3) test system of the present invention can achieve to involved shape memory alloy material in electric current and Joule heat coupling
Under displacement and temperature monitoring, obtain the displacement of one or several labelling points and temperature data on monitored sample simultaneously,
It is applied to sign function fatigue behaviour under electric-thermal coupled field for the shape memory alloy material.
4) coupling processing to temperature and displacement data for the present invention, also can inspire in other multiple physical fields (as electric field, magnetic
Field, temperature field, stress field etc.) material that works under coupling condition or component function fatigue behaviour sign.
5) present invention is upgraded to atypia mechanical property testing system with reference to unconventional loading means and is many physics
Fatigue property test under the coupling of field provides more references.
Brief description
Fig. 1 is the structural representation of the shape memory alloy material fatigue property test system in electric-thermal coupled field.
In figure illustrates：Monitored shape memory alloy material 1, fatigue test specimen platform 2, metal column 3, power supply 4, when
Between relay 5, shot box 6, viewfinder 7, lighting source 8, cooling fan 9, industrial camera 10, camera foot stool 11, thermometric
Thermocouple 12, temperature acquisition card 13, computer 14.
Specific embodiment
Below in conjunction with accompanying drawing, the present invention is described in detail, so as to being more clearly understood that shape note of the present invention
Recall alloy material function fatigue property test system under electric-thermal coupled field.
As shown in figure 1, the shape memory alloy material fatigue property test system in electric-thermal coupled field, for shape note
Recall alloy material function fatigue property test under electric-thermal coupled field, including electric power system, camera chain, temperature acquisition system,
Control system and monitor station；Electric power system is made up of the loop of power supply 4 and connecting wire；Camera chain includes carrying viewfinder
7 shot box 6, lighting source 8, industrial camera 10 and camera foot stool 11；Temperature acquisition system includes temperature thermocouple 12
With temperature acquisition card 13；Control system includes the time relay 5 and computer 14；Monitor station includes sample stage 2 and metal column 3；
Sample stage 2 is provided with two metal columns 3, monitored sample 1 two ends of tape label point respectively with sample stage 2 on two
Root metal column 3 is connected, a pole of 3 connection power supplies 4 of two metal columns, and another pole and the time of power supply 4 continue
Electrical equipment 5 connects, and another of the time relay 5 and two metal columns 3 is connected；Sample stage 2 is arranged in shot box 6, just to taking the photograph
The viewfinder 7 of shadow case；In shot box 6, viewfinder 7 upper left side and upper right side are respectively provided with two lighting sources 8, are monitored sample
Product 2 provide photography light；Two cooling fans 9 are just being respectively provided with to the left and right sides of sample stage 2 on shot box 6；Two cooling fans 9
It is connected in series, one end connects a pole of power supply 4, other end Connection Time relay 5；The time relay 5 and power supply 4
It is connected；Industrial camera 10 is arranged on camera foot stool 11；Industrial camera 10 is just to viewfinder 7 and monitored shape memory
Alloy material 1；Temperature thermocouple 12 is posted on monitored shape memory alloy material 1；Temperature thermocouple 12 connects temperature acquisition
Card 13；Photo and temperature data are transferred to computer 14 by communication cable by industrial camera 10 and temperature acquisition card 13；Take the photograph
Shadow case 6 is made up of the lighttight acrylic board of black.
The time relay 5 is simultaneously in monitored shape memory alloy material 1 loop and cooling fan 9 loop, one end
Connect power supply 4, the other end connects monitored shape memory alloy material 1 and cooling fan 9, time relay independent control
Power supply 4 is respectively the time of monitored shape memory alloy material 1 and cooling fan 9 interleaved power.
Described power supply 4 is preferably D.C. regulated power supply.
The described time relay is on-delay type and need not be connected with computer.
Described lighting source is preferably the photography luminaire of 5500K colour temperature.
The preferred spherical head in described camera foot stool top, makes industrial camera adjustable angle.
Described temperature thermocouple is preferably the special thin K-type thermocouple of 80 μm of diameter.
Described temperature thermocouple is by high temperature resistant heat insulation adhesive tape sticking on the surface of described shape memory alloy material.
Test system, using front, first draws one or several labelling points on monitored shape memory alloy material 1, mark
The color of note point need to be clearly distinguishable from ambient color；Monitored shape memory alloy material 1 two ends are surveyed with fatigue respectively
Two metal columns 3 in sample sample platform 2 are connected；Connect 3 poles with power supply 4 of metal column with wire, by metal column 3
Another be connected with an output port of the time relay 5；The centre position in 6 one faces of shot box has a viewfinder
7, the sample stage 2 that will be equipped with monitored shape memory alloy material 1 is placed in the photography being made up of the lighttight acrylic board of black
In case 6 and just viewfinder 7 is being placed；Two cooling fans 9 of sample stage 2 both sides on shot box 6 are connected in series, then
Cooling fan 9 one end of series connection is connected with power supply 4, another output port phase of the other end and the time relay 5
Even；The input port of the time relay 5 and power supply 4 are not had loaded one to be extremely connected；Camera foot stool 11 is placed in and takes the photograph
Shadow case 6 outer just to viewfinder 7 at, industrial camera 10 is arranged on camera foot stool 11, adjusts camera foot stool 11 angle
And height, make industrial camera 10 just to monitored shape memory alloy material 1.With high temperature resistant heat insulation adhesive tape by a diameter of 80 μm
Ultra-fine K-type thermocouple 12 be firmly pasted onto monitored shape memory alloy material 1 surface, temperature thermocouple 12 other end and temperature
Degree capture card 13 is connected；Then respectively industrial camera 10 and temperature acquisition card 13 are connected to computer 14 with communication cable
On.
Before carrying out function testing fatigue, first open top-right two lighting sources 8 left positioned at the internal viewfinder of shot box,
Open the image capture software in computer 14, temperature acquisition software data processes software；Image capture software is general work
Industry camera software kit, can arrange photo size with taking pictures and be spaced and pass through the dynamic deformation of photographic window mouth real-time monitoring sample；
Temperature acquisition software is general data capture card software kit, can arrange the dynamic of temperature data acquisition interval real-time monitoring temperature
State changes；Data processing software includes displacement software for calculation data integration software；Displacement software for calculation is based on matlab's
Program, this program first reads the photo captured by image capture software, due to the rgb value of labelling point on sample monitored in photo
It is clearly distinguished from the rgb value of other pixels in picture, program is capable of identify that the labelling point with specific rgb value in picture
Coordinate, the coordinate figure of labelling point on this coordinate figure and not deformed sample is carried out difference operation and is multiplied by unit pixel representative
Physical length, can obtain the displacement of labelling point on this moment monitored sample；Data Integration software is the journey based on labview
Sequence, this program can read the data of institute's collecting temperature passage and displacement passage respectively and identify the creation time of each data, will
The temperature data that the same time creates is corresponding with displacement data, output temperature-displacement curve；Observe in image capture software
Photography window is it is ensured that monitored shape memory alloy material 1 is in the centre position of picture and mark captured by industrial camera 10
Note point is clear and legible；Setting photo size and interval of taking pictures in image capture software；Temperature is set in temperature acquisition software
Acquisition interval；The color value (RGB) of labelling point on monitored sample 1 is inputted in picture reading program；On the time relay 5
The conduction time in two loops of its control is set so that power supply 4 is monitored shape note in the time interval setting
Recall alloy material 1 and cooling fan 9 interleaved power；The output voltage of setting power supply 4.
After completing the assembling of function fatigue test system and software and hardware parameter setting, open power supply 4 and switch, start
The start program of data acquisition and processing (DAP) software；Monitored shape memory alloy material 1 can be due to Joule heat in galvanization
Effect and heat up and lowered the temperature by cooling fan 9 thus producing alternate change of shape after a loss of power, displacement calculation procedure can be to work
Labelling point on photo captured by industry photographing unit 10 carries out the displacement that RGB parses and calculates this labelling point；Data integration program
Draw temperature-shift value relation by integrating mutually temperature channel data in the same time and displacement channel data.
It is pointed out that power supply recited above, the time relay, cooling fan, industrial camera, photographing unit
Foot rest, temperature acquisition card, computer etc. can adopt any suitable model known to persons of ordinary skill in the art.
In addition, though in above-described embodiment, the photo taken by industrial camera obtains quilt via computer disposal
The displacement of labelling point on monitoring sample, it should be understood by those skilled in the art that can be by taken one or several
Individual photo carries out the alternate manner such as artificial treatment and artificial calculating to obtain the displacement of one or several labelling points on sample.
The present invention obtains described shape memory alloy material by above-mentioned test system and makees in electric current and joule thermal coupling
With under displacement and this two significant datas of temperature, by statistical disposition is carried out and quantitative analysiss can achieve to the data obtaining
Sign to described shape-memory material function fatigue behaviour under electric-thermal coupled field.
On the basis of the present invention or under inspiration, those skilled in the art may make various changes or change to the present invention,
These modifications or improvements and embodiments thereof equally also fall within concept disclosed in the present application and under technological frame.
Claims (9)
1. the shape memory alloy material fatigue property test system in electric-thermal coupled field is it is characterised in that include power supply system
System, camera chain, temperature acquisition system, control system and monitor station；Electric power system is mainly power supply；Camera chain includes
Shot box with viewfinder, lighting source and industrial camera；Temperature acquisition system includes temperature thermocouple and temperature acquisition card；
Control system includes the time relay and computer；Monitor station includes sample stage and metal column；
Sample stage is provided with two metal columns, the monitored sample two ends of tape label point respectively with sample stage on two metal columns
It is connected, a pole of a piece connection power supply of two metal columns, another pole of power supply is connected with the time relay, the time
Another of relay and two metal columns is connected；Sample stage is arranged in shot box, just the viewfinder to shot box；Shot box
Interior viewfinder upper left side and upper right side are respectively provided with two lighting sources；Just the left and right sides of sample stage is filled respectively on shot box
There are two cooling fans；Two cooling fans are connected in series, and one end connects a pole of power supply, other end Connection Time relay
Device；Industrial camera is just to viewfinder and monitored sample；Temperature thermocouple is attached on monitored sample；Temperature thermocouple connects
Temperature acquisition card；Industrial camera and temperature acquisition card connect computer.
2. the shape memory alloy material fatigue property test system in electric-thermal coupled field according to claim 1, it is special
Levy and be, described industrial camera is arranged on camera foot stool, described camera foot stool height adjustable.
3. the shape memory alloy material fatigue property test system in electric-thermal coupled field according to claim 1 and 2,
It is characterized in that, the top tape ball-shaped cloud platform of described camera foot stool.
4. the shape memory alloy material fatigue property test system in electric-thermal coupled field according to claim 1, it is special
Levy and be, described shot box is made up of the lighttight acrylic board of black.
5. the shape memory alloy material fatigue property test system in electric-thermal coupled field according to claim 1, it is special
Levy and be, described power supply is D.C. regulated power supply.
6. the shape memory alloy material fatigue property test system in electric-thermal coupled field according to claim 1, it is special
Levy and be, described lighting source is the photography luminaire of 5500K colour temperature.
7. the shape memory alloy material fatigue property test system in electric-thermal coupled field according to claim 1, it is special
Levy and be, described temperature thermocouple is the special thin K-type thermocouple of 80 μm of diameter.
8. the shape memory alloy material fatigue property test system in the electric-thermal coupled field according to claim 1 or 7,
It is characterized in that, described temperature thermocouple is by high temperature resistant heat insulation adhesive tape sticking on the surface of described shape memory alloy material.
9. the shape memory alloy material fatigue property test system in electric-thermal coupled field according to claim 1, it is special
Levy and be, the color of the labelling point on described shape memory alloy material is clear and legible relative to surrounding.
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| CN201611088408.4A CN106442124B (en) | 2016-11-30 | 2016-11-30 | Fatigue performance testing system for shape memory alloy material in electric-thermal coupling field |
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| CN108717025A (en) * | 2018-04-19 | 2018-10-30 | 电子科技大学 | A kind of two-way shape memory alloy heat-mechanical function fatigue characteristic testing device |
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| CN111723511A (en) * | 2020-07-02 | 2020-09-29 | 哈尔滨工业大学 | Electromigration simulation method for three-dimensional packaging interconnection line |
| CN112858033A (en) * | 2021-01-07 | 2021-05-28 | 重庆理工大学 | Electric heating shape memory alloy spring performance test system |
| CN113730837A (en) * | 2021-08-26 | 2021-12-03 | 西安交通大学 | Rescue expanding device and method based on shape memory alloy |
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