CN108333066A - A kind of Analysis of Fatigue Behavior method and system for thermal protection structure - Google Patents
A kind of Analysis of Fatigue Behavior method and system for thermal protection structure Download PDFInfo
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- CN108333066A CN108333066A CN201711045655.0A CN201711045655A CN108333066A CN 108333066 A CN108333066 A CN 108333066A CN 201711045655 A CN201711045655 A CN 201711045655A CN 108333066 A CN108333066 A CN 108333066A
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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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/36—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by pneumatic or hydraulic means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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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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Abstract
This application provides a kind of Analysis of Fatigue Behavior method for thermal protection structure, the step of this method, includes：Slow test is carried out to multiple test specimens to be analyzed, determines the maximum control load for fatigue test and minimum control load；Based on minimum control load and maximum control load, with the scheduled alternating load period, fatigue test is carried out to multiple test specimens to be analyzed；It is compared according to the fracture apperance of test specimen to be analyzed, determines the chief destructive load of test specimen to be analyzed.Herein described technical solution is capable of the maneuvering load condition of real simulation thermal protection structure, improves the analysis reliability to the fatigue properties of thermal protection structure, and has the advantages that for engineering evaluation thin-walled thermal protection structure and its practical and convenient to carry out.
Description
Technical field
This application involves aircraft performance analysis field more particularly to a kind of use fatigue experimental device evaluation interlayer seams
The fatigue properties test analysis method and system of box-like thermal protection structure tolerance pulsatile pressure performance.
Background technology
Subsonic speed and flight Mach number be not serious less than the Aerodynamic Heating problem that 4 supersonic vehicle faces, therefore
Aircraft outer surface is mostly metal bearing structure.For the structure of metal material design, structural strength, rigidity and tough
Property it is preferable, do not need to individually consider gas pressure influence.Hypersonic aircraft long-time High Mach number (Ma
＞ 5) it flies in endoatmosphere, aircraft surface is faced with harsh Aerodynamic Heating environment, and traditional metal material cannot
Meet the requirement that large area uses, it usually needs carry out outer thermal protection struc ture design.The sandwich suture type heat proposed in the present invention is anti-
Protection structure is a kind of novel thermal protection structure of excellent combination property, since which employs stratified energy mechanism, surface layer solar heat protection faces
Plate is thin wall ceramic material, it is therefore desirable to pay close attention to the influence of gas pressure.
Traditional gas pressure mostly uses shock tunnel and is simulated, and there are system complex journeys for such experimental rig
Degree is high, tests short problem of sustainable time, can not real simulation thermal protection structure maneuvering load condition, it is also difficult to be used for
Evaluate the use reliability of thermal protection structure.
Invention content
One of to solve above-mentioned technical problem, this application provides a kind of Analysis of Fatigue Behavior for thermal protection structure
The step of method, this method includes：
Slow test is carried out to multiple test specimens to be analyzed, determines that maximum control load and minimum for fatigue test are controlled
Load processed；
Based on minimum control load and maximum control load, with the scheduled alternating load period, to multiple test specimens to be analyzed
Carry out fatigue test；
It is compared according to the fracture apperance of test specimen to be analyzed, determines the chief destructive load of test specimen to be analyzed.
Preferably, the test specimen to be analyzed is on the sandwich suture type thermal protection structure of micro/nano-scale porous material composition
Fabric unit.
Preferably, it is described to test specimen to be analyzed carry out slow test, determine for fatigue test maximum control load and
The step of minimum control load includes：
Slow test is carried out to multiple test specimens to be analyzed, and records the breaking load P of each test specimen to be analyzed；
By 90%Pmin, PminFor minimum breaking load, the maximum control load N as fatigue testmax, and by 1/2Nmax
Minimum control load as fatigue test.
Preferably, the scheduled alternating load period is：C=T × a, wherein a is aerodynamic force fluctuation pressure energy quantity set
Middle frequency, t are thermal protection structure usage time.
Preferably, described based on minimum control load and maximum control load, with the scheduled alternating load period, to more
A test specimen to be analyzed carries out the deadline that fatigue test terminates in the step of fatigue test and is：
If all test specimens to be analyzed are broken or reach the default alternating load period during fatigue test, stopping is tested,
And record the alternating load period of fatigue test experience.
Preferably, described to be compared according to the fracture apperance of test specimen to be analyzed, determine the chief destructive load of test specimen to be analyzed
The step of further include：
Be analysed to the slow test of test specimen fracture and fatigue test during be broken test specimen to be analyzed fracture into
Row comparison, judges the chief destructive load of the exemplar.
Preferably, described to be compared according to the fracture apperance of test specimen to be analyzed, determine the chief destructive load of test specimen to be analyzed
The step of further include：
When being up to the default alternating load period, there is no the test specimen to be analyzed of fracture to carry out static(al) after fatigue test
Experiment, and record residual intensity；
After being analysed to the fracture of the slow test before the fatigue test of test specimen, the fracture of fatigue test and fatigue test
Fracture compared, judge the chief destructive load of the exemplar.
One of to solve above-mentioned technical problem, it is special that the application further provides a kind of fatigue for thermal protection structure
Property analysis system, the system include：
Static test device carries out slow test to multiple test specimens to be analyzed, determines the maximum control for fatigue test
Load and minimum control load；Or, carrying out slow test to the test specimen to be analyzed after fatigue test；
Fatigue experimental device, it is right with the scheduled alternating load period based on minimum control load and maximum control load
Multiple test specimens to be analyzed carry out fatigue test；
Comparison unit compares according to the fracture apperance of test specimen to be analyzed, determines the chief destructive load of test specimen to be analyzed.
Preferably, the scheduled alternating load period is：C=T × a, wherein a is aerodynamic force fluctuation pressure energy quantity set
Middle frequency, t are thermal protection structure usage time.
Preferably, the test specimen to be analyzed is on the sandwich suture type thermal protection structure of micro/nano-scale porous material composition
Fabric unit.
Beneficial effects of the present invention are as follows：
Herein described technical solution is capable of the maneuvering load condition of real simulation thermal protection structure, improves to thermal protection
The analysis reliability of the fatigue properties of structure, and have for engineering evaluation thin-walled thermal protection structure and its practical and be convenient for
The advantages of implementation.
Description of the drawings
Attached drawing described herein is used for providing further understanding of the present application, constitutes part of this application, this Shen
Illustrative embodiments and their description please do not constitute the improper restriction to the application for explaining the application.In the accompanying drawings：
Fig. 1 shows the schematic diagram of herein described sandwich suture type thermal protection structure；
Fig. 2 shows the schematic diagrames of herein described Analysis of Fatigue Behavior method.
Drawing reference numeral
1, ceramic top panel, 2, laminboard layer, 3, ceramic suture, 4, ceramic lower panel, 5, ceramic panel monoblock type it is compound
Thermal insulation tile, 6, silicon rubber, 7, elastic metallic bearing structure.
Specific implementation mode
In order to which the technical solution and advantage that make the application are more clearly understood, below in conjunction with attached drawing to the example of the application
Property embodiment is described in more detail, it is clear that and described embodiment is only a part of the embodiment of the application, and
The exhaustion of not all embodiment.And in the absence of conflict, the feature in the embodiment and embodiment in this explanation can
To be combined with each other.
The juche idea of the present invention is constituted to micro/nano-scale porous material based on traditional fatigue test method
Sandwich suture type thermal protection structure carry out more close to the alternating load fatigue test of authenticity, and combine slow test, it is comprehensive
The sandwich suture type thermal protection structure progress Analysis of Fatigue Behavior constituted to micro/nano-scale porous material is closed, is not only increased point
The reliability for analysing result has the advantages that engineering evaluation thin-walled thermal protection structure and its practical and convenient to carry out.
As shown in Figure 1, suture interlayer monoblock type thermal protection structure described in this programme includes：From top to bottom stack successively
The ceramic panel monoblock type composite heat-insulating tile 5 that ceramic top panel 1, laminboard layer 2 and ceramic lower panel 4 form.Ceramic top panel 1
Pass through ceramic suture 3 between ceramic lower panel 4 to suture.The ceramic panel monoblock type composite heat-insulating tile 5 is placed in elasticity
In metal bearing structure 7, centre is adhesively fixed by silicon rubber 6.
As shown in Fig. 2, present solution provides a kind of Analysis of Fatigue Behavior method for thermal protection structure, this programme institute
For thermal protection structure be micro/nano-scale porous material constitute sandwich suture type thermal protection structure on fabric unit.It should
The specific steps of method include：
1) slow test is carried out to multiple test specimens to be analyzed, determines maximum control load and minimum for fatigue test
Control load；In the step, first, slow test is carried out to multiple test specimens to be analyzed, and record the broken of each test specimen to be analyzed
Bad load p；Then, by 90%Pmin, PminFor minimum breaking load, the maximum control load N as fatigue testmax, and will
1/2NmaxMinimum control load as fatigue test.With this, the minimum and maximum control load of fatigue test is determined.
2) it is based on minimum control load and maximum control load, with the scheduled alternating load period, to multiple examinations to be analyzed
Part carries out fatigue test.Wherein, the scheduled alternating load period is：C=T × a, wherein a is aerodynamic force fluctuation pressure
It is thermal protection structure usage time that energy, which concentrates frequency, t,.In the present solution, the deadline of fatigue test is：Fatigue test
All test specimen fractures to be analyzed of Cheng Zhongruo reach the default alternating load period, then test stopping, and record fatigue test experience
The alternating load period.
3) it is compared according to the fracture apperance of test specimen to be analyzed, determines the chief destructive load of test specimen to be analyzed.Fatigue test
After, by the fracture apperance of test specimen to be analyzed during the fracture apperance for the test specimen to be analyzed being broken and slow test
It is compared, determines the chief destructive load of test specimen to be analyzed.If be up to the default alternating load period, tried by fatigue
The test specimen to be analyzed tested is not broken, then carries out test of static strength to the test specimen, and record residual intensity；And it is analysed to try
Fracture after the fracture of slow test before the fatigue test of part, the fracture of fatigue test and fatigue test is compared, and is judged
The chief destructive load of the exemplar.
The application further provides a kind of Analysis of Fatigue Behavior system for thermal protection structure, which includes：
Static test device carries out slow test to multiple test specimens to be analyzed, determines the maximum control for fatigue test
Load and minimum control load；Or, carrying out slow test to the test specimen to be analyzed after fatigue test；
Fatigue experimental device, it is right with the scheduled alternating load period based on minimum control load and maximum control load
Multiple test specimens to be analyzed carry out fatigue test；
Comparison unit compares according to the fracture apperance of test specimen to be analyzed, determines the chief destructive load of test specimen to be analyzed.
This programme is described further below by example.
The main contents of the present invention are specimen Design to be analyzed, trystate design and three parts of test result analysis.
Specimen Design to be analyzed, embodiments thereof are：From preparing, molding sandwich suture type thermal protection structure ontology is enterprising
The sampling in kind of row outer surface panel material, retains basic structure feature, includes mainly：At least retain the whole suture of a row
The suture hole characteristic of line；At least (fabric in tri- directions X/Y/Z exists the fabric unit feature of five panels of reservation
At least mass of fibers weaves feature, referred to as a fabric unit)；The length L of outer panels and the thickness H ratios for buying panel meet
L/H≥25.As shown in Figure 1.
Trystate designs and experiment process, follows the steps below：
The first step takes no less than 5 test specimens to be analyzed to carry out room temperature slow test, records every test specimen to be analyzed and destroys
Load p；
Second step selects minimum breaking load Pmin in cold test, selects maximums of the 90%Pmin as fatigue test
Control load Nmax selects the minimum control load of 1/2Nmax fatigue tests the most；
Third walks, when concentrating frequency a and thermal protection structure to use according to the fluctuation pressure energy that aerodynamic force profession provides
Between t, set alternating load period c=t × a；
4th step, experimental rig and test method described in reference standard HB7624-1998 carry out fatigue test；
5th step, test specimen to be analyzed, which destroyed or reach after the preset alternating load period, stops experiment, and record, which destroys, to be waited for point
Analyse the alternating load period of test specimen experience；
6th step carries out room temperature test of static strength again for the test specimen to be analyzed not destroyed, records remaining strong
Degree；
7th step carries out electron microscope observation, before comparative analysis fatigue test to the fracture apperance of all test samples
Static(al) destroys, destroy during fatigue test and fatigue test after static(al) destroy difference between three kinds of states.
Result evaluation is implemented in the following way：
Standard slow test state is taken to destroy exemplar and the destruction exemplar progress fracture apperance scanning of fatigue test state, with
The spike protein gene degree of fracture, fiber fracture apperance judge the chief destructive load of other exemplars as basis for estimation.
It should be understood by those skilled in the art that, embodiments herein can be provided as method, apparatus or computer journey
Sequence product.Therefore, complete hardware embodiment, complete software embodiment or combining software and hardware aspects can be used in the application
The form of embodiment.Moreover, the application can be used in one or more wherein include computer usable program code calculating
The computer program implemented in machine usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.)
The form of product.
The application is with reference to method, the flow of equipment (device) and computer program product according to the embodiment of the present application
Figure and/or block diagram describe.It should be understood that can be realized by computer program instructions each in flowchart and/or the block diagram
The combination of flow and/or box in flow and/or box and flowchart and/or the block diagram.These computers can be provided
Processor of the program instruction to all-purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices
To generate a machine so that the instruction executed by computer or the processor of other programmable data processing devices generates
For realizing the function of being specified in one flow of flow chart or multiple flows and/or one box of block diagram or multiple boxes
Device.
These computer program instructions, which may also be stored in, can guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works so that instruction stored in the computer readable memory, which generates, includes
The manufacture of command device, the command device are realized in one flow of flow chart or multiple flows and/or one box of block diagram
Or the function of being specified in multiple boxes.
These computer program instructions also can be loaded onto a computer or other programmable data processing device so that
Series of operation steps are executed on computer or other programmable devices to generate computer implemented processing, to calculate
The instruction executed on machine or other programmable devices is provided for realizing in one flow of flow chart or multiple flows and/or side
The step of function of being specified in one box of block diagram or multiple boxes.
Although the preferred embodiment of the application has been described, once a person skilled in the art knows basic wounds
The property made concept, then additional changes and modifications may be made to these embodiments.It is wrapped so the following claims are intended to be interpreted as
It includes preferred embodiment and falls into all change and modification of the application range.
Claims (10)
1. a kind of Analysis of Fatigue Behavior method for thermal protection structure, which is characterized in that the step of this method includes：
Slow test is carried out to multiple test specimens to be analyzed, determines and is carried for the maximum control load of fatigue test and minimum control
Lotus；
Multiple test specimens to be analyzed are carried out with the scheduled alternating load period based on minimum control load and maximum control load
Fatigue test；
It is compared according to the fracture apperance of test specimen to be analyzed, determines the chief destructive load of test specimen to be analyzed.
2. according to the method described in claim 1, it is characterized in that, the test specimen to be analyzed is constituted for micro/nano-scale porous material
Sandwich suture type thermal protection structure on fabric unit.
3. method according to claim 1 or 2, which is characterized in that it is described that slow test is carried out to test specimen to be analyzed, it determines
The step of maximum control load and minimum control load for fatigue test includes：
Slow test is carried out to multiple test specimens to be analyzed, and records the breaking load P of each test specimen to be analyzed；
By 90%Pmin, PminFor minimum breaking load, the maximum control load N as fatigue testmax, and by 1/2NmaxAs
The minimum control load of fatigue test.
4. according to the method described in claim 3, it is characterized in that, the scheduled alternating load period be：C=T × a,
In, a is aerodynamic force fluctuation pressure energy concentration frequency, and t is thermal protection structure usage time.
5. according to the method described in claim 3, it is characterized in that, described based on minimum control load and maximum control load,
With the scheduled alternating load period, when the cut-off that fatigue test terminates in the step of carrying out fatigue test to multiple test specimens to be analyzed
Between be：
If all test specimens to be analyzed are broken or reach the default alternating load period during fatigue test, stopping is tested, and remember
Record the alternating load period of fatigue test experience.
6. method according to claim 3, which is characterized in that described to be compared according to the fracture apperance of test specimen to be analyzed, determination waits for
Analyze test specimen chief destructive load the step of further include：
Be analysed to the slow test of test specimen fracture and fatigue test during the fracture of test specimen to be analyzed that is broken carry out pair
Than judging the chief destructive load of the exemplar.
7. according to the method described in claim 6, it is characterized in that, described compare according to the fracture apperance of test specimen to be analyzed, really
The step of chief destructive load of test specimen to be analyzed further includes calmly：
When being up to the default alternating load period, there is no the test specimen to be analyzed of fracture to carry out slow test after fatigue test,
And record residual intensity；
The fracture being analysed to after the fracture of the slow test before the fatigue test of test specimen, the fracture of fatigue test and fatigue test
It is compared, judges the chief destructive load of the exemplar.
8. a kind of Analysis of Fatigue Behavior system for thermal protection structure, which is characterized in that the system includes：
Static test device carries out slow test to multiple test specimens to be analyzed, determines the maximum control load for fatigue test
With minimum control load；Or, carrying out slow test to the test specimen to be analyzed after fatigue test；
Fatigue experimental device is waited for the scheduled alternating load period multiple based on minimum control load and maximum control load
It analyzes test specimen and carries out fatigue test；
Comparison unit compares according to the fracture apperance of test specimen to be analyzed, determines the chief destructive load of test specimen to be analyzed.
9. system according to claim 8, which is characterized in that the scheduled alternating load period is：C=T × a,
In, a is aerodynamic force fluctuation pressure energy concentration frequency, and t is thermal protection structure usage time.
10. system according to claim 8, which is characterized in that the test specimen to be analyzed is micro/nano-scale porous material structure
At sandwich suture type thermal protection structure on fabric unit.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4145933A (en) * | 1978-03-24 | 1979-03-27 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Fatigue failure load indicator |
| SU1718068A1 (en) * | 1990-05-03 | 1992-03-07 | Нижегородский государственный педагогический институт им.М.Горького | Method of determination of material service life |
| CN105181476A (en) * | 2015-08-05 | 2015-12-23 | 哈尔滨工业大学 | Method and device for testing high temperature fatigue performance of thermal protection material |
| CN105319215A (en) * | 2014-08-04 | 2016-02-10 | 中国科学院金属研究所 | Titanium alloy indoor temperature load-holding fatigue failure judgment method |
-
2017
- 2017-10-31 CN CN201711045655.0A patent/CN108333066B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4145933A (en) * | 1978-03-24 | 1979-03-27 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Fatigue failure load indicator |
| SU1718068A1 (en) * | 1990-05-03 | 1992-03-07 | Нижегородский государственный педагогический институт им.М.Горького | Method of determination of material service life |
| CN105319215A (en) * | 2014-08-04 | 2016-02-10 | 中国科学院金属研究所 | Titanium alloy indoor temperature load-holding fatigue failure judgment method |
| CN105181476A (en) * | 2015-08-05 | 2015-12-23 | 哈尔滨工业大学 | Method and device for testing high temperature fatigue performance of thermal protection material |
Non-Patent Citations (1)
| Title |
|---|
| 周挺: "热防护系统面板材料拉伸和疲劳行为的实验研究", 《中国优秀硕士学位论文全文数据库（电子期刊）》 * |
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