CN108333066B - 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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- CN108333066B CN108333066B CN201711045655.0A CN201711045655A CN108333066B CN 108333066 B CN108333066 B CN 108333066B CN 201711045655 A CN201711045655 A CN 201711045655A CN 108333066 B CN108333066 B CN 108333066B
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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
Abstract
This application provides a kind of Analysis of Fatigue Behavior method for thermal protection structure, the step of this method includes: to carry out slow tests to multiple test specimens to be analyzed, determines maximum control load and minimum control load for fatigue test；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 sutures
The fatigue properties test analysis method and system of formula thermal protection structure tolerance pulsatile pressure performance.
Background technique
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 toughness
Preferably, the influence for individually considering gas pressure is not needed.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 is no longer satisfied
The requirement that large area uses, it usually needs carry out outer thermal protection struc ture design.The sandwich suture type thermal protection knot proposed in the present invention
Structure is a kind of novel thermal protection structure of excellent combination property, and due to which employs stratified energy mechanism, surface layer solar heat protection panel 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 to be simulated, and there are system complexities for such experimental rig
Height tests short problem of sustainable time, can not real simulation thermal protection structure maneuvering load condition, it is also difficult to for evaluating
The use reliability of thermal protection structure.
Summary of the invention
One of to solve above-mentioned technical problem, this application provides a kind of Analysis of Fatigue Behavior sides for thermal protection structure
The step of method, this method includes:
Slow test is carried out to multiple test specimens to be analyzed, determines maximum control load and minimum control for fatigue test
Load；
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, PminMaximum control load N for minimum breaking load, as fatigue testmax, and by 1/2Nmax
Minimum control load as fatigue test.
Preferably, the scheduled alternating load period are as follows: c=T × a, wherein a is aerodynamic force fluctuation pressure energy quantity set
Middle frequency, t are that thermal protection structure uses the time.
Preferably, described based on minimum control load and maximum control load, with the scheduled alternating load period, to multiple
Test specimen to be analyzed carries out the deadline that fatigue test terminates in the step of fatigue test are as follows:
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) examination after fatigue test
It tests, and records residual intensity；
After the fracture of slow test before being analysed to the fatigue test of test specimen, the fracture of fatigue test and fatigue test
Fracture compares, and judges the chief destructive load of the exemplar.
One of to solve above-mentioned technical problem, the application further provides a kind of fatigue properties for thermal protection structure
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, 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 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 are as follows: c=T × a, wherein a is aerodynamic force fluctuation pressure energy quantity set
Middle frequency, t are that thermal protection structure uses the 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 knot
The analysis reliability of the fatigue properties of structure, and have for engineering evaluation thin-walled thermal protection structure and its practical and convenient to carry out
The advantages of.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present application, constitutes part of this application, this Shen
Illustrative embodiments and their description please are not constituted an undue limitation on the present 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 embodiment
In order to which technical solution and the advantage of the application is more clearly understood, below in conjunction with attached drawing to the exemplary of the application
Embodiment is described in more detail, it is clear that and described embodiment is only a part of the embodiment of the application, rather than
The exhaustion of all embodiments.And in the absence of conflict, the feature in the embodiment and embodiment in this explanation can be mutual
It combines.
Juche idea of the invention is to be constituted based on traditional fatigue test method to micro/nano-scale porous material
Sandwich suture type thermal protection structure carries out more close to the alternating load fatigue test of authenticity, and combines slow test, comprehensive
Analysis of Fatigue Behavior is carried out to the sandwich suture type thermal protection structure that micro/nano-scale porous material is constituted, not only increases analysis knot
The reliability of fruit 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: the pottery from top to bottom successively stacked
The ceramic panel monoblock type composite heat-insulating tile 5 that porcelain top panel 1, laminboard layer 2 and ceramic lower panel 4 form.Ceramic top panel 1 and pottery
It is sutured between porcelain lower panel 4 by ceramic suture 3.The ceramic panel monoblock type composite heat-insulating tile 5 is placed in elastic metallic
In 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 needle
Pair thermal protection structure be micro/nano-scale porous material constitute sandwich suture type thermal protection structure on fabric unit.This method
Specific steps include:
1) slow test is carried out to multiple test specimens to be analyzed, determines maximum control load and minimum control for fatigue test
Load processed；In the step, firstly, carrying out slow test to multiple test specimens to be analyzed, and the destruction of each test specimen to be analyzed is recorded
Load p；Then, by 90%Pmin, PminMaximum control load N for minimum breaking load, as fatigue testmax, and by 1/
2NmaxMinimum control load as fatigue test.With this, the minimum and maximum control load of fatigue test is determined.
2) 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 are as follows: c=T × a, wherein a is aerodynamic force fluctuation pressure energy
Frequency in quantity set, t are that thermal protection structure uses the time.In the present solution, the deadline of fatigue test are as follows: during fatigue test
If all test specimen fractures to be analyzed reach the default alternating load period, stopping is tested, and record the friendship of fatigue test experience
The varying 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 into
Row compares, and determines the chief destructive load of test specimen to be analyzed.If be up to the default alternating load period, by fatigue test
Test specimen to be analyzed is not broken, then carries out test of static strength to the test specimen, and record residual intensity；And it is analysed to the tired of test specimen
The fracture of slow test, the fracture of fatigue test before labor test and the fracture after fatigue test compare, and judge the exemplar
Chief destructive load.
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, 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 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.
Main contents of the invention are specimen Design to be analyzed, trystate design and three parts of test result analysis.
Specimen Design to be analyzed, embodiments thereof are as follows: 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, specifically includes that at least retaining one arranges whole suture
Suture hole characteristic；At least (fabric in tri- directions X/Y/Z exists at least the fabric unit feature of five panels of reservation
Mass of fibers weaves feature, referred to as a fabric unit)；The length L of outer panels and the thickness H ratio for buying panel meet L/H >=
25.As shown in Figure 1.
Trystate design and test process, follow 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
Lotus P；
Second step selects minimum breaking load Pmi n in cold test, select 90%Pmi n as fatigue test most
Big control load Nmax, selects the minimum control load of 1/2Nmax fatigue test the most；
Third step, 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 HB 7624-1998 carry out fatigue test；
5th step, test specimen to be analyzed stop test after destroying or reaching the preset alternating load period, and record is destroyed wait divide
Analyse the alternating load period of test specimen experience；
6th step carries out room temperature test of static strength for the test specimen to be analyzed not destroyed again, records remaining strong
Degree；
7th step carries out electron microscope observation to the fracture apperance of all test samples, before comparative analysis fatigue test
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 disconnected
The spike protein gene degree of mouth, fiber fracture apperance judge the chief destructive load of other exemplars as judgment basis.
It should be understood by those skilled in the art that, embodiments herein can provide as method, apparatus or computer program
Product.Therefore, complete hardware embodiment, complete software embodiment or reality combining software and hardware aspects can be used in the application
Apply the form of example.Moreover, it wherein includes the computer of computer usable program code that the application, which can be used in one or more,
The computer program implemented in usable storage medium (including but not limited to magnetic disk storage, CD-ROM, optical memory etc.) produces
The form of product.
The application is referring to method, the process 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 every one stream in flowchart and/or the block diagram can be realized by computer program instructions
The combination of process and/or box in journey and/or box and flowchart and/or the block diagram.It can provide these computer programs
Instruct the processor of general purpose computer, special purpose computer, Embedded Processor or other programmable data processing devices to produce
A raw machine, so that being generated by the instruction that computer or the processor of other programmable data processing devices execute for real
The device for the function of being specified in present one or more flows of the flowchart and/or one or more blocks of the block diagram.
These computer program instructions, which may also be stored in, is able to guide computer or other programmable data processing devices with spy
Determine in the computer-readable memory that mode works, so that it includes referring to that instruction stored in the computer readable memory, which generates,
Enable the manufacture of device, the command device realize in one box of one or more flows of the flowchart and/or 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 counting
Series of operation steps are executed on calculation machine or other programmable devices to generate computer implemented processing, thus in computer or
The instruction executed on other programmable devices is provided for realizing in one or more flows of the flowchart and/or block diagram one
The step of function of being specified in a box or multiple boxes.
Although the preferred embodiment of the application has been described, it is created once a person skilled in the art knows basic
Property concept, then additional changes and modifications may be made to these embodiments.So it includes excellent that the following claims are intended to be interpreted as
It selects 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. the method according to claim 1, wherein the test specimen to be analyzed is micro/nano-scale porous material composition
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, PminMaximum control load N for minimum breaking load, 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 are as follows: c=T × a,
In, a is that aerodynamic force fluctuation pressure energy concentrates frequency, and t is that thermal protection structure uses the 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 are as follows:
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. according to the method in claim 3, which is characterized in that it is described according to the fracture apperance of test specimen to be analyzed compare, determine to
The step of analyzing the chief destructive load of test specimen 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 fixed test specimen to be analyzed 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 slow test after fatigue test,
And record residual intensity；
Fracture after the fracture of slow test before being analysed to the fatigue test of test specimen, the fracture of fatigue test and fatigue test
It compares, 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 being used 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, based on minimum control load and maximum control load, with the scheduled alternating load period, to it is multiple to
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 are as follows: c=T × a,
In, a is that aerodynamic force fluctuation pressure energy concentrates frequency, and t is that thermal protection structure uses the 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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| 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 |
| CN105319215B (en) * | 2014-08-04 | 2017-11-03 | 中国科学院金属研究所 | Titanium alloy room temperature, which is protected, carries fatigue failure decision method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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| Title |
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| 热防护系统面板材料拉伸和疲劳行为的实验研究;周挺;《中国优秀硕士学位论文全文数据库（电子期刊）》;20160315;C031-322 |
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