CN109799152A - A kind of full service temperature section composite-material body built-in fitting fatigue experimental device and test method - Google Patents
A kind of full service temperature section composite-material body built-in fitting fatigue experimental device and test method Download PDFInfo
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- CN109799152A CN109799152A CN201910231405.9A CN201910231405A CN109799152A CN 109799152 A CN109799152 A CN 109799152A CN 201910231405 A CN201910231405 A CN 201910231405A CN 109799152 A CN109799152 A CN 109799152A
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- 239000002131 composite material Substances 0.000 title claims abstract description 60
- 238000010998 test method Methods 0.000 title description 4
- 238000005057 refrigeration Methods 0.000 claims abstract description 72
- 238000010438 heat treatment Methods 0.000 claims abstract description 62
- 238000012360 testing method Methods 0.000 claims abstract description 44
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims abstract description 22
- 230000005540 biological transmission Effects 0.000 claims abstract description 6
- 238000000465 moulding Methods 0.000 claims abstract description 5
- 238000009434 installation Methods 0.000 claims abstract description 4
- 238000009661 fatigue test Methods 0.000 claims description 32
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 16
- 229910052757 nitrogen Inorganic materials 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 7
- 239000004411 aluminium Substances 0.000 claims description 3
- 229910052782 aluminium Inorganic materials 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims 1
- 238000009413 insulation Methods 0.000 description 12
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000000889 atomisation Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
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Abstract
The invention discloses a kind of full service temperature section composite-material body built-in fitting fatigue experimental devices, comprising: fixed part, including support platform, connection pedestal, guide rail etc., connect pedestal, it is mounted on fatigue tester, and the connection pedestal is U-shaped bottom seat, and bottom end is inverted T shaped；Temperature control modules specifically include that heating module, refrigeration module, surface temperature sensor etc., and composite panel is with built-in fitting integrated molding and setting is in the fixed device, and according to the installation thermal module of test ambient temperature selectivity；When test temperature is higher than normal temperature, composite panel is clamped between heating module；When test temperature is lower than normal temperature, composite panel is clamped between refrigeration module, and thermal module and surface temperature sensor form closed-loop system to control Part temperature, also, the thermal module is arranged in the connection pedestal；Transmission rod, is rotatablely connected with the built-in fitting, and the other end is fixedly connected with the side jaw of fatigue tester.
Description
Technical field
The present invention relates to Composites Fatigue experimental technique fields, and in particular to a kind of full service temperature section composite material
Vehicle body built-in fitting fatigue experimental device and test method.
Background technique
Currently, the lightweight of body of a motor car becomes more and more important, thus compound under the development main trend of energy-saving and emission-reduction
Application of the material in vehicle body also more comes also extensively.Composite-material body built-in fitting is the important company of one kind of vehicle body composite material
Form is connect, there is a large amount of application, therefore the safety and reliability of composite material built-in fitting tie point in composite-material body
It is very important for automobile.Fatigue rupture is one of most commonly seen failure mode in all kinds of parts and structure, fatigue
Performance is also the important performance indexes of each part and structure, is that each part and safety of structure check an essential Xiang Huan
Section.Operating condition locating for auto parts and components is more changeable, and service temperature range is big, and temperature change section is -40 DEG C to 80 DEG C, and is answered
Condensation material mechanical property has sensibility to temperature, and the static behavior of the composite material bonded structure under low temperature and high temperature can reach two
Times gap, and mechanical property also has decaying to composite material built-in fitting at relatively high temperatures.Therefore, pre- for composite-material body
The experiment on fatigue properties that embedded part accounts for temperature influence is very important.
It is tested for vehicle body built-in fitting, this team has proposed a kind of composite-material body built-in fitting strength test fixture hair
Bright patent, Patent No. ZL201510523716.4, which, which can realize, carries out complicated strength test for vehicle body built-in fitting, but
It is limited in that can only carry out static(al) mechanical test at normal temperature, and temperature change can not be considered to built-in fitting mechanical property shadow
It rings.
Summary of the invention
The present invention is to solve current technology shortcoming, and it is pre- to provide a kind of full service temperature section composite-material body
Embedded part fatigue experimental device, can carry out on-line heating or refrigeration to composite-material body built-in fitting, and test temperature changes to pre-
Embedded part Effect on Mechanical Properties.
The present invention also provides a kind of full service temperature section composite-material body built-in fitting fatigue test test methods, lead to
Crossing the several representative temperatures chosen can obtain choosing S-N curve and data point at each temperature, and the data obtained point is fitted it
The vehicle body built-in fitting fatigue behaviour under different temperatures can be obtained afterwards.
A kind of technical solution provided by the invention are as follows: full service temperature section composite-material body built-in fitting fatigue test dress
It sets, comprising:
Built-in fitting, with composite panel integrated molding to be measured；
Temperature control modules, clamp the composite panel, and the temperature control modules include heating module and refrigeration
Module, according to the installation thermal module of test ambient temperature selectivity；
Wherein, when environment temperature is higher than normal temperature, composite panel is clamped between heating module；
When environment temperature is lower than normal temperature, composite panel is clamped between refrigeration module；
Transmission rod, one end and the built-in fitting are rotatablely connected, and the side jaw of the other end and fatigue tester is fixed to be connected
It connects；
Pedestal is connected, the connection pedestal is U-shaped bottom seat, and bottom end is inverted T shaped, also, the thermal module is arranged in institute
It states in connection pedestal；
Guide rail is arranged below the connection pedestal, and the bottom end of the connection pedestal is slidably disposed on described lead
In rail, the bottom end of the guide rail is fixed on the lower jaw of electronic universal tester.
Preferably,
The heating module includes upper heating plate and lower heating plate；
Wherein, the upper heating plate and lower first opening of heating plate center setting, first opening is interior to be arranged institute
State built-in fitting；
The refrigeration module includes upper refrigeration clamping plate and lower refrigeration clamping plate；
Wherein, the upper refrigeration module and the lower refrigeration clamping plate center setting second are open, and set in second opening
Set the built-in fitting.
Preferably,
Clamping plate interface is heated in the upper heating clamping plate side setting, the lower heating clamping plate side setting is lower to heat clamping plate
Interface；
Freeze clamping plate intake interface in the upper refrigeration clamping plate side setting, the lower lower refrigeration of refrigeration clamping plate side setting
Clamping plate intake interface.
Preferably,
Backing plate is supported, is arranged between the upper heating clamping plate and the lower heating clamping plate or in the upper refrigeration clamping plate
Between the lower refrigeration clamping plate；
Surface temperature sensor is arranged in the built-in fitting root.
Preferably,
The thickness of the lower heating clamping plate is greater than the thickness of the upper heating clamping plate；
The thickness of the lower refrigeration clamping plate is greater than the thickness of the upper refrigeration clamping plate.
Preferably,
The upper heating clamping plate and the lower heating clamping plate are cast aluminium electrothemic plate.
Preferably,
The upper refrigeration clamping plate and the lower refrigeration clamping plate are hollow cavity, and the external liquid nitrogen of the intake interface is deposited
Storage tank.
Preferably,
Venthole is respectively set on the upper refrigeration clamping plate and the lower refrigeration clamping plate.
A kind of full service temperature section composite-material body built-in fitting fatigue test method, includes the following steps:
Step 1: built-in fitting to be tested is tested under different test ambient temperatures, by the test specimen and fixture
It is placed 2 hours in the environment temperature；
Step 2: carrying out fatigue test under different test ambient temperatures, varying environment temperature T is obtainediAnd it is different tired
Labor intensity PjUnder experimental point (Sij,Nij), and varying environment temperature T can be made respectivelyiUnder the curve of fatigue；Wherein, i=1,
2,3..., N, j=1,2,3..., M, SijFor corresponding temperature TiWith fatigue strength PjUnder fatigue stress, NijCorresponding temperature TiWith
Fatigue strength PjUnder fatigue life；And
Fatigue test is carried out under different test ambient temperatures, obtains varying environment temperature TiAnd different fatigue intensity Pj
Under experimental point (Ti,Sij,Nij), and data point is fitted based on least square method, obtain varying environment temperature TiUnder
Temperature fatigue curved surface, and obtain functional relation corresponding with the curved surface；
Preferably,
In the step 2, when test, take temperature from low to high, the sequence of fatigue strength from high to low carry out tired examination
It tests, and tested using staircase method is chosen.
It is of the present invention the utility model has the advantages that
1, the present invention provides it is a kind of consideration temperature influence composite-material body built-in fitting fatigue test auxiliary device,
The device can carry out on-line heating or refrigeration to composite-material body built-in fitting, so that test specimen temperature is reached set temperature, and protect
It holds set temperature and fatigue test is carried out by fatigue tester.
2, the present invention provides the method for fatigue test in a kind of full service temperature section of composite-material body built-in fitting, benefits
The thought being fitted with data with interpolation, by several representative temperatures of selection can obtain choosing S-N curve at each temperature with
Data point, the vehicle body built-in fitting fatigue behaviour that will can be obtained after the fitting of the data obtained point under different temperatures.
3, refrigeration is used in the auxiliary device of composite-material body built-in fitting fatigue test provided by the present invention and is added
Hot two kinds of clamping plates can carry out on-line heating or refrigeration to composite-material body built-in fitting temperature, select in higher temperature test
Clamping plate is heated, in low-temperature test using refrigeration clamping plate, used temperature control system is simple, small in size, cheap, peace
It fills easy to use.
4, the auxiliary device of composite-material body built-in fitting fatigue test provided by the present invention, utilizes common fatigue test
Machine can account for the fatigue test of temperature influence, avoid using special fatigue test environmental cabinet, greatly reduce device
Complexity and cost.
Detailed description of the invention
Fig. 1 is the knot of heating module part in the composite-material body built-in fitting fatigue test auxiliary device of the invention
Structure schematic diagram.
Fig. 2 is the knot of refrigeration module part in the composite-material body built-in fitting fatigue test auxiliary device of the invention
Structure schematic diagram.
Fig. 3 is when heating module is housed in heretofore described composite-material body built-in fitting fatigue test auxiliary device
Schematic diagram.
Fig. 4 is when refrigeration module is housed in heretofore described composite-material body built-in fitting fatigue test auxiliary device
Schematic diagram.
Fig. 5 is the clamp region figure that freezes in composite-material body built-in fitting fatigue test auxiliary device of the present invention.
Fig. 6 is gained T-S-N surface chart in embodiment.
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.
As shown in Figs 1-4, the present invention provides a kind of full service temperature section composite-material body built-in fitting fatigue test dress
It sets, wherein temperature control modules, specifically includes that heating module, refrigeration module, surface temperature sensor etc., composite panel
With built-in fitting integrated molding and setting is in the fixed device, and according to the installation temperature of test ambient temperature selectivity
Spend module；When test temperature is higher than normal temperature, composite panel is clamped between heating module；When test temperature is lower than mark
When quasi- temperature, composite panel is clamped between refrigeration module；
One end of transmission rod 140 and the built-in fitting are rotatablely connected, and the side jaw of the other end and fatigue tester is fixed
Connection.Pedestal 100 is connected, is U-shaped bottom seat, bottom end is inverted T shaped, also, the thermal module is arranged in the connection pedestal
In 100.Support platform is set in connection 100 inside two sides of pedestal, thermal module is arranged above support platform.Guide rail 130 is set
It sets below the connection pedestal 100, the bottom end of the connection pedestal 100 is slidably disposed in the guide rail 130, described
The bottom end of guide rail 130 is fixed on the lower jaw of fatigue tester.
140 top of transmission rod is fixed on the upper jaw of fatigue tester, and power transmission rod piece 1 can be upper with fatigue tester
Jaw and move up and down.What built-in fitting 150 was generally made of metal, pedestal embedded composite material plate before shaping, then
Integrated molding.
The heating module 110 includes upper heating plate 111 and lower heating plate 112, and the two passes through fixing bolt and nut 103
It is fixed；Wherein, the first opening of the upper heating plate 111 and 112 center of lower heating plate setting, the interior setting of the first opening
The built-in fitting 150；
The refrigeration module 120 includes upper refrigeration clamping plate 121 and lower refrigeration clamping plate 122, and the two passes through fixing bolt and spiral shell
Mother 103 is fixed；Wherein, the upper refrigeration module 121 and lower 122 center of refrigeration clamping plate setting, second opening, described second
The setting built-in fitting 150 in opening.
Clamping plate interface 113, lower 112 side of the heating clamping plate setting are heated in upper 111 side of the heating clamping plate setting
Lower heating clamping plate interface 114.Freeze clamping plate intake interface 123 in upper 121 side of the refrigeration clamping plate setting, the lower refrigeration folder
The lower clamping plate intake interface 124 that freezes of 122 side of plate setting.Clamping plate external power supply and controller are heated, freeze the external liquid nitrogen of clamping plate
Nozzle and controller.
Four angles between the upper heating clamping plate 111 and the lower heating clamping plate 112 are arranged in four support backing plates 101
Place or it is described it is upper refrigeration clamping plate 121 and it is described it is lower refrigeration clamping plate 122 between four angles at.
Stablize backing plate 105 be long rectangle and with thermal insulation board stack pile, be arranged among lower thermal insulation board, in fatigue test
When, it avoids due to lower thermal insulation board and generating damping effect influences the accuracy of fatigue test.
Surface temperature sensor 102 is arranged in the built-in fitting root.
Lower heating 112 thickness of clamping plate is greater than the thickness of the upper heating clamping plate 111；The lower refrigeration clamping plate 122 is thick
Degree is greater than the thickness of the upper refrigeration clamping plate 121.To in fatigue test to reserving sufficient space below built-in fitting.
The upper heating clamping plate and the lower heating clamping plate are cast aluminium electrothemic plate.Shape as shown in figure 5, heating clamping plate from
It is connected at corresponding interface with external controller, to realize that heating and temperature to built-in fitting test specimen control.
Two thermal insulation boards (upper thermal insulation board 104 and lower thermal insulation board 106) have been used to be placed in the top and the bottom of lower clamp plate respectively
(the upper setting of thermal insulation board 104 adds in upper 111 top of heating clamping plate or upper 121 top of refrigeration clamping plate, the lower setting of thermal insulation board 106 lower
Hot 112 lower part of clamping plate or lower 122 lower part of refrigeration clamping plate), reducing temperature loss, improve heat insulation effect, wherein on described every
Hot plate is identical as upper clamp plate shape, and lower thermal insulation board is and the same size rectangle of clamping plate and the empty position for removing placement stabilizing block.
Refrigeration clamping plate in refrigeration module is (as shown in Figure 5) hollow cavity, external liquid nitrogen storage tank, by solenoid valve control
It is slowly sprayed into through air inlet inside atomization liquid nitrogen to cold plate, nitrogen is discharged by the venthole that refrigeration postlaminar part is arranged, thus real
It now reduces refrigeration plate temperature and realizes the effect freezed to test specimen in turn.
Heating clamping plate and refrigeration clamping plate are to be replaced mutually element, and the test dress is selectively assemblied according to experimental condition
In setting.
The present invention also provides a kind of full service temperature section composite-material body built-in fitting fatigue test method, including it is as follows
Step:
Step 1: regarding the built-in fitting tested as test specimen, different test ambient temperatures is selected, by the test specimen and folder
Tool is placed 2 hours in the environment temperature；
Step 2: carrying out fatigue test under different test ambient temperatures, varying environment temperature T is obtainediAnd it is different tired
Labor intensity PjUnder experimental point (Sij,Nij), and specific temperature T can be madeiUnder the curve of fatigue；Wherein, i=1,2,3...,
N, j=1,2,3..., M, SijFor corresponding temperature TiWith fatigue strength PjUnder fatigue stress, NijCorresponding temperature TiAnd fatigue strength
PjUnder fatigue life；
Step 3: temperature is obtained new data point (T in conjunction with each corresponding some column experimental pointsi,Sij,Nij), and base
Data point is fitted in least square method, obtains temperature fatigue curved surface and corresponding functional relation.
In composite-material body built-in fitting Test Method of Fatigue Behavior in the full service temperature section, data are being carried out
When fitting, MATLAB software can be used, obtained data are fitted by Curve Fitting Tool, to obtain institute
Curved surface and relational expression are needed, data processing is simple and convenient easy to operate.
Specifically, step 1 includes: to select heating clamping plate or refrigeration clamping plate according to test temperature, it is pre- by be tested
Embedded part is mounted in composite-material body built-in fitting fatigue test auxiliary device and surface temperature sensor is affixed to built-in fitting
Heating clamping plate or liquid nitrogen solenoid valve and temperature sensor are accessed peripheral control unit by root, and blending bolt is fixed in pedestal
On, described device is mounted on fatigue tester lower jaw, fatigue tester upper jaw connecting rod is connected by pin shaft and built-in fitting
It connects.
Fatigue test is carried out by staircase method, a test specimen is chosen first and measures the surrender of its static stretch at a set temperature
Intensity R0, it is set as the 0th grade of stress level, and set the 1st grade of stress level R1=0.95R0, the 2nd grade of stress level R2=
0.95R1, and so on.
In stress level R0The 1st specimen test of lower progress, the sample are reaching specified life N=107It is sent out before secondary circulation
Destruction is given birth to, then the 2nd sample is just in the stress level R of the low level-one of stress intensity1Under tested, if previous sample
Through 107Secondary circulation is not destroyed, then a subsequent sample will carry out under the higher leveled stress level of stress intensity, until complete
Until one group of 16 test specimen.Repeat to test at different temperatures, and records corresponding experimental data Ti, Sij, Nij。
Step E: test data is combined to obtain each point (Ti,Sij,Nij), to obtained each point (Ti,Sij,Nij) benefit
Least square method is based on MATLAB software and carries out data fitting, to obtain temperature fatigue curved surface and function relational expression.
Specifically, according to test requirements document temperature, thermal module selected to use chooses glass fibre composite wood in this example
Material built-in fitting is tested.Heating clamping plate is used after first using refrigeration clamping plate by this Case Experiments On A temperature requirement.
Upper thermal insulation board is placed on upper refrigeration clamping plate, lower thermal insulation board and stabilizing block are placed under lower refrigeration clamping plate, with
Built-in fitting is clamped between the pedestal being sandwiched in lower freeze clamping plate and traditional loading section and is fixed on upper refrigeration folder by stabilizing block
Between plate and lower refrigeration clamping plate, lip block and same be clipped between lower clamp plate of built-in fitting are placed in four corners, by fixing bolt
And above-mentioned component is fixed on traditional loading section by nut, and surface temperature sensor is pasted on built-in fitting root, by liquid
The electromagnetism valve nozzle access refrigeration clamping plate import of nitrogen storage tank, and solenoid valve and temperature sensor are connected with peripheral control unit,
Finally device is connected with fatigue tester lower jaw, fatigue tester upper jaw and built-in fitting pin connection are set by controller
Determine test temperature, can be tested after built-in fitting temperature is stablized and records data.
It after low-temperature test, sandwiches before built-in fitting, refrigeration clamping plate is changed to heating clamping plate and by heating clamping plate
Interface, which is connected to controller, can carry out higher temperature test.
According to experimental condition, fatigue test temperature is set by controller.By vehicle body service temperature range, choose
Test temperature is respectively that -40 °, -10 °, 20 °, 50 °, 80 ° pass through to avoid frequency is excessively high built-in fitting is caused to generate temperature rising
Fatigue tester sets fatigue loading frequency as 3Hz, and load ratio is -1.Measure data at each temperature respectively by staircase method
Value, and it is combined into data point (N, S, T) with temperature, using the CFtool tool in MATLAB, based on least square method to data
It is fitted, just obtains the fitting surface (as shown in Figure 6) and equation of T-S-N, (R2It is 0.89) as follows:
T=f (N, S)=P00+P10N+P01S+P20N2+P11NS+P02N2
Wherein: Coefficients (with 95%confidence bounds):
P00=49.03 (- 164.5,262.6)
P10=0.1476 (- 1.02,1.315)
P01=0.6331 (- 0.5014,1.768)
P20=0.00326 (0.001353,0.005168)
P11=-0.003456 (- 0.00656, -0.0003516)
P02=-0.001564 (- 0.003063, -6.428e-05)
Thus the fatigue properties of composite-material body built-in fitting under any service temperature can be obtained.
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
Realize other modification, 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 legend shown and described herein.
Claims (10)
1. a kind of full service temperature section composite-material body built-in fitting fatigue experimental device characterized by comprising
Built-in fitting, with composite panel integrated molding to be measured；
Temperature control modules, clamp the composite panel, and the temperature control modules include heating module and refrigeration module,
According to the installation thermal module of test ambient temperature selectivity；
Wherein, when environment temperature is higher than normal temperature, composite panel is clamped between heating module；
When environment temperature is lower than normal temperature, composite panel is clamped between refrigeration module；
Transmission rod, one end and the built-in fitting are rotatablely connected, and the other end is fixedly connected with the side jaw of fatigue tester；
Pedestal is connected, the connection pedestal is U-shaped bottom seat, and bottom end is inverted T shaped, also, the thermal module is arranged in the company
It connects in pedestal；
Guide rail is arranged below the connection pedestal, and the bottom end of the connection pedestal is slidably disposed in the guide rail,
The bottom end of the guide rail is fixed on the lower jaw of electronic universal tester.
2. full service temperature section composite-material body built-in fitting fatigue experimental device according to claim 1, feature
It is,
The heating module includes upper heating plate and lower heating plate；
Wherein, the upper heating plate and lower first opening of heating plate center setting, the interior setting of the first opening are described pre-
Embedded part；
The refrigeration module includes upper refrigeration clamping plate and lower refrigeration clamping plate；
Wherein, the upper refrigeration module and lower second opening of refrigeration clamping plate center setting, second opening is interior to be arranged institute
State built-in fitting.
3. full service temperature section composite-material body built-in fitting fatigue experimental device according to claim 2, feature
It is,
Clamping plate interface is heated in the upper heating clamping plate side setting, the lower heating clamping plate side setting is lower to heat fished joint
Mouthful；
Freeze clamping plate intake interface in the upper refrigeration clamping plate side setting, the lower lower clamping plate that freezes of refrigeration clamping plate side setting
Intake interface, another side are equipped with gas vent.
4. full service temperature section composite-material body built-in fitting fatigue experimental device according to claim 3, feature
It is,
Backing plate is supported, is arranged between the upper heating clamping plate and the lower heating clamping plate or in the upper refrigeration clamping plate and institute
It states between lower refrigeration clamping plate；
Surface temperature sensor is arranged in the built-in fitting root.
5. full service temperature section composite-material body built-in fitting fatigue experimental device according to claim 4, feature
It is,
The thickness of the lower heating clamping plate is greater than the thickness of the upper heating clamping plate；
The thickness of the lower refrigeration clamping plate is greater than the thickness of the upper refrigeration clamping plate.
6. full service temperature section composite-material body built-in fitting fatigue experimental device according to claim 4, feature
It is,
The upper heating clamping plate and the lower heating clamping plate are cast aluminium electrothemic plate.
7. full service temperature section composite-material body built-in fitting fatigue experimental device according to claim 6, feature
It is,
The upper refrigeration clamping plate and the lower refrigeration clamping plate are hollow cavity, and the intake interface is via electromagnetism valve nozzle
External liquid nitrogen storage tank.
8. full service temperature section composite-material body built-in fitting fatigue experimental device according to claim 7, feature
It is,
Venthole is respectively set on the upper refrigeration clamping plate and the lower refrigeration clamping plate.
9. a kind of full service temperature section composite-material body built-in fitting fatigue test method, which is characterized in that including walking as follows
It is rapid:
Step 1: built-in fitting to be tested is tested under different test ambient temperatures, by the test built-in fitting and folder
Tool is placed 2 hours in the environment temperature；
Step 2: carrying out fatigue test under different test ambient temperatures, varying environment temperature T is obtainediAnd different fatigue intensity
PjUnder experimental point (Sij,Nij), and varying environment temperature T can be made respectivelyiUnder the curve of fatigue；Wherein, i=1,2,
3..., N, j=1,2,3..., M, SijFor corresponding temperature TiWith fatigue strength PjUnder fatigue stress, NijCorresponding temperature TiWith it is tired
Labor intensity PjUnder fatigue life；And
Fatigue test is carried out under different test ambient temperatures, obtains varying environment temperature TiAnd different fatigue intensity PjUnder
Experimental point (Ti,Sij,Nij), and data point is handled based on least square method, obtain varying environment temperature TiUnder temperature
Tired curved surface, and the curved surface is fitted, obtain functional relation corresponding with the curved surface.
10. full service temperature section composite-material body built-in fitting fatigue test method according to claim 9, feature
It is,
In the step 2, when test, take temperature from low to high, the sequence of fatigue strength from high to low carry out fatigue test,
And it is tested using staircase method is chosen.
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