CN107677547A - Fatigue, creep and the characterizing method in exhaustion creep interaction unified life-span of material - Google Patents
Fatigue, creep and the characterizing method in exhaustion creep interaction unified life-span of material Download PDFInfo
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- CN107677547A CN107677547A CN201710796885.4A CN201710796885A CN107677547A CN 107677547 A CN107677547 A CN 107677547A CN 201710796885 A CN201710796885 A CN 201710796885A CN 107677547 A CN107677547 A CN 107677547A
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
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- G—PHYSICS
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- 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
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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
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Abstract
The characterizing method for unifying the life-span is interacted the invention discloses a kind of fatigue of material, creep and exhaustion creep, belongs to the life prediction field of aero-engine critical material.Purpose is sought peace forecasting problem to solve Life Table of the material under the conditions of low-cycle fatigue, creep and exhaustion creep interaction.Its principle is to protect the exhaustion creep interaction, low-cycle fatigue and the creep test that carry under the time different by carrying out material, obtain effectively to protect respectively using normalization computational methods and carry time and normalization dimensionless life-span, then establish the life-span prediction method of the power function form with non-linear sign ability.This method can be with accurate characterization material under the conditions of low-cycle fatigue and Fatigue-Creep Interaction life-span, particularly it can be considered that simultaneously Accurate Prediction creep life.It is an advantage of the invention that can consider that physical mechanism and can is taken into account model and is easy to implement, the unified Life Table of low-cycle fatigue, creep and exhaustion creep interaction for effectively solving material is sought peace forecasting problem.
Description
Technical field
The present invention is the characterizing method of a kind of fatigue of material, creep and spleen tissue extracts interaction unified life-span,
It is related to the life prediction of aero-engine structural material, belongs to measurement technical field of measurement and test.
Background technology
In the national essential industry field such as energy source and power, petrochemical industry, nuclear energy nuclear power and Aero-Space, many comprehensive mechanics
The high-temperature structural material of excellent performance is widely used in the high-temperature component of processing and process industry product key position.Phase under arms
Between, these high-temperature components usually cause tired (fatigue) damage because of the transient state load cycle for bearing to start-stop repeatedly,
Part high-temperature component will also work under certain equilibrium temperature for a long time, so as to which the related creep (creep) of time of origin damages, very
To work in the case where spleen tissue extracts interact (creep-fatigue interaction, CFI) load to the high-temperature component having, also can
Trigger complicated spleen tissue extracts Mutual damage.Fatigue damage, creep impairment, spleen tissue extracts Mutual damage are with high-temperature component work
Make the passage of time and linearly or nonlinearly increase and accumulate, when damage reaches the critical damage value of material, high-temperature component is
Generation is failed or fracture.In addition, many results of study show, under high temperature circulation load-up condition, the life-span of high-temperature component is often
Restricted by many factors such as fatigue at high temperature, high-temerature creep and Fatigue-creep Interactions.So carry out it can be considered that more
The life-span prediction method research that kind of factor influences just seems very necessary and significant, but in life-span prediction method research field,
The Life Prediction Model of fatigue, creep and Fatigue-creep Interaction is all independently established, and at most part spleen tissue extracts are handed over
Mutual Life Prediction Model is it can be considered that fatigue life, can not but take into account creep life.Can be simultaneously it would therefore be highly desirable to develop one kind
The unified Life Prediction Model of fatigue, creep and spleen tissue extracts interaction is considered, to material development and engineer applied and structural integrity
Property evaluation there is important scientific research meaning and engineering application value.
Lot of domestic and foreign scientific research personnel and engineers and technicians for material low-cycle fatigue (low cycle fatigue,
LCF), creep and Fatigue-creep Interaction have carried out substantial amounts of basic research and technical transform work, propose in succession over one hundred
Kind low-cycle fatigue, creep and spleen tissue extracts interaction Life Prediction Model.For low-cycle fatigue life, common life prediction mould
Type mainly includes plastic strain (energy) theory, overall strain (energy) theory, dissipated energy theory etc..For creep life, the common longevity
Ordering forecast model mainly includes Omega parametric methods, progressively Theta sciagraphies, extrapolation and the continuous media based on physical mechanism
Damage model etc..The life-span is interacted for spleen tissue extracts, common Life Prediction Model mainly includes life-span-time score method, answered
Become scope partitioning, strain energy partitioning, stress relaxation area method, metallography life-span prediction method and ductility loss method etc..It is real
On border, it is many to influence the factor of material lifetime, such as strain/stress scope, loading speed, Loaded contact analysis, protects and carry time and guarantor
Load form etc..The above-mentioned every kind of life-span prediction method enumerated is established according to specific material condition and experimental condition, all
It is to be conducted a research for influenceing the principal element in life-span.Some Life Prediction Models have certain physical mechanism, and are formed
The theoretical system of a set of comparative maturity, but its equation is complicated, even material parameter numerous numerical value are intended across yardstick, its parameter optimization
It is cumbersome to close program, it is not easy to obtain suitable material parameter, so as to which precision of prediction will have a greatly reduced quality, be also unsuitable for engineer applied.
Some other Life Prediction Models are based on Macroscopic phenomenological method method, and equation form is simple and material parameter is readily available, but lack
Weary clear and definite physical significance, the basic theory imperfection of method for supporting research, it is difficult to popularization and application.By the end of current, both at home and abroad
Researcher also without propose a kind of reliable, succinct and with clear and definite physical significance life-span prediction method can characterize simultaneously and
Predict low-cycle fatigue, creep and spleen tissue extracts the interaction life-span of material.
The content of the invention
The present invention is exactly to design regarding to the issue above and provide a kind of fatigue of material, creep and spleen tissue extracts interaction
The characterizing method in unified life-span, the purpose is to adopt the same method can be to material low-cycle fatigue, creep and spleen tissue extracts
The interaction life-span accurately and reliably characterize and predict.This method can consider that physical mechanism and can takes into account model simple, effectively solution
Certainly low-cycle fatigue, creep and the spleen tissue extracts of material under the high temperature conditions interact life-span unified Modeling and forecasting problem, using most
A young waiter in a wineshop or an inn multiplies the material parameter that optimized algorithm obtains model, and material properties extraction, Optimizing Flow are easy,
The purpose of the present invention is achieved through the following technical solutions：
Fatigue, creep and the characterizing method in spleen tissue extracts interaction unified life-span of this kind of material, the material is aviation hair
Employ structural material, it is characterised in that：Steps of the method are：
Step 1: carrying out under same temperature T and same tensile load σ different protect to material carries the fatigue of times △ t-compacted
Become cross-talk test, the experiment uses Stress Control and stress ratio is 0, and guarantor refers to holding for tensile load peak value σ max at the load time
Continuous phases-time；
Step 2: under the conditions of the temperature T and tensile load σ described in step 1, it is 0 to carry out Stress Control and stress ratio
Low cycle fatigue test and creep test；
Step 3: low-cycle fatigue, creep based on material and spleen tissue extracts interaction experiment, by whether there is protect carry the time and
Load time length is protected to determine effectively to protect load time △ ti/tp accordingly, wherein：
I=1,2,3 ... ..., n；N carries time △ t numbers to protect；
Tp is the circulation time of a complete load in low-cycle fatigue, creep and spleen tissue extracts interaction experiment；
Step 4: it is consistent for the life unit kept with creep test obtains, low-cycle fatigue and spleen tissue extracts are interacted
The fatigue and cyclic number of experiment is converted into the time in seconds, and the gained time is temperature T described in step 1 and tensile load σ bars
The low-cycle fatigue of material and spleen tissue extracts interaction life-span under part；By the creep of material and spleen tissue extracts interaction life-span and step 1
The low-cycle fatigue life of material is divided by under the conditions of the temperature T and tensile load σ, obtains the low-cycle fatigue of material, creep and tired
The normalization characteristic Tf/Tf-LCF in labor-creep interaction life-span, wherein：Tf and Tf-LCF represents the fracture longevity of material respectively
Life and low-cycle fatigue life, unit are the second；
Step 5: the low-cycle fatigue for the material that the effective guarantor load time △ ti/tp and step 4 that are determined in step 3 are determined,
On the basis of the normalization characteristic Tf/Tf-LCF in creep and spleen tissue extracts interaction life-span, foundation has non-linear sign energy
The sign formula in the unified life-span of the power function form of power：
In formula：Tl represents the load time, and A, b and n are the material parameters related to temperature；
Step 6: the number that step 5 unifies A, b and n in the sign formula in life-span is obtained using Least-squares minimization algorithm
Value.
The value of the temperature T is higher than aeroplane engine with the 30% of structural material melting temperature.
The technical scheme is that based on material in different spleen tissue extracts interaction, the low-cycle fatigue and compacted protected and carried under the times
Become test data, obtained respectively using normalization computational methods and effectively protect load time and normalization dimensionless life-span, then established
The life-span prediction method of power function form with non-linear sign ability, the unified life-span is obtained using Least-squares minimization algorithm
The material parameter of characterizing method, finally realize low-cycle fatigue, creep and the accurate characterization in spleen tissue extracts interaction life-span to material
And prediction.
In technical solution of the present invention, guarantor's load time is that creep effect is considered in During Low Cycle Fatigue, creep effect
Creep impairment caused by answering generates cracking influence on material low-cycle fatigue life, causes fatigue life to reduce, described effectively to protect
The time quantitative description proportion of creep impairment in spleen tissue extracts Mutual damage from physical significance is carried, its value size represents
The order of severity of creep impairment, can establish effectively to protect using power function formula and carry the time with considering creep impairment normalization nothing
Relation between the dimension life-span.Formula is characterized using the unified life-span time spleen tissue extracts interaction test data is carried to different protect
Fitting, it can be obtained by interpolation method and meet that any guarantor of experimental condition carries the life-span under time conditions, and can be tried
Checking.
Beneficial effect
1. a kind of low-cycle fatigue of material proposed by the present invention, creep and the unified Life Table of spleen tissue extracts interaction are sought peace pre-
Survey method, theoretical foundation is solid, and modeling process is very simple, and material parameter optimization process is succinct, and with clear and definite physics meaning
Justice.
2. a kind of low-cycle fatigue of material proposed by the present invention, creep and the unified Life Table of spleen tissue extracts interaction are sought peace pre-
Survey method, the low-cycle fatigue and spleen tissue extracts interaction life prediction of material can be taken into account, can particularly consider material simultaneously
Creep life, this method possess the sign in low-cycle fatigue, creep and spleen tissue extracts the interaction unified life-span of material and pre- completely
Survey ability.
3. the present invention has a good application prospect, the life-span is interacted according to the low-cycle fatigue, creep and spleen tissue extracts of material
Test data, the life-span can be interacted with the different spleen tissue extracts for protecting material under load time conditions of Accurate Prediction, avoid substantial amounts of examination
Repetition and waste are tested, has saved considerable human and material resources and financial resources and time cost, substantially reduces the experiment week of material
Phase, the process of material development and engineer applied and structural intergrity assessment is accelerated, have significant scientific research value and engineering should
Use meaning.
Brief description of the drawings
The unified Life Table of material low-cycle fatigue, creep and spleen tissue extracts interaction that Fig. 1 gives the present invention is sought peace prediction side
Method flow chart.
Fig. 2 gives fatigue of materials-creep interaction controlling test waveform diagram of the present invention
Fig. 3 gives fatigue of materials-creep interaction proof stress-strain-responsive schematic diagram of the present invention
The TiAl alloy that Fig. 4 gives the embodiment of the present invention interacts in 750 DEG C of low-cycle fatigue, creep and spleen tissue extracts
Under the conditions of the curve that changes over time of mean strain
The TiAl alloy that Fig. 5 gives the embodiment of the present invention interacts in 800 DEG C of low-cycle fatigue, creep and spleen tissue extracts
Under the conditions of the curve that changes over time of mean strain
Effective guarantor that Fig. 6 gives TiAl alloy of the embodiment of the present invention carries time and low-cycle fatigue, creep and spleen tissue extracts
Relation between the normalization characteristic in interaction life-span
Fig. 7 gives low-cycle fatigue of the embodiment of the present invention, creep and the unified life approach prediction result of spleen tissue extracts interaction
Contrast between result of the test
Fig. 8 gives the embodiment of the present invention and predicts different result of calculation and the examinations protected and carried under the time using unified life approach
The contrast tested between result
Embodiment
Below using the unified Life Table of low-cycle fatigue, creep and spleen tissue extracts interaction of Fig. 1 materials of the invention provided
Forecasting Methodology of seeking peace flow chart simultaneously illustrates to the inventive method in conjunction with the embodiments.
Example：Low-cycle fatigue, creep and spleen tissue extracts interaction unified Life Table of the TiAl alloy at 750 DEG C and 800 DEG C
Seek peace prediction, steps of the method are：
Step 1: carry out fatigue at high temperature-creep interaction experiment of TiAl alloy.
For TiAl alloy, the spleen tissue extracts experiment of Stress Control under the conditions of 750 DEG C and 800 DEG C, test method are carried out
With reference to GB/T 15248-2008 standards《Metal material axial direction constant amplitude low-cycle fatigue test method》Perform, using Stress Control
Mode and stress ratio are 0, and tensile load 320MPa, Load-unload speed be 32MPa/s, protect the load time and refer to tensile load peak
The value σ max sustained period time, in the present embodiment, tensile load peak value σ max are exactly 320MPa, △ t selections 10s, 20s, 30s
With tetra- time intervals of 60s.Fig. 2, Fig. 3 sets forth the spleen tissue extracts interaction controlling test ripple of the TiAl alloy of the present invention
Shape and corresponding stress-strain response schematic diagram, wherein ε min, ε max, ε mean and ε represent spleen tissue extracts interaction experiment respectively
Minimum strain, maximum strain, mean strain and strain, unit %；σ and σ max represent stress and maximum stress respectively, single
Position is MPa；T represents time, unit s.Table 1 lists TiAl alloy in the different spleen tissue extracts friendships protected and carried under time conditions
Mutual life-span original experiment data.
The TiAl alloy of table 1 is in the different spleen tissue extracts interaction life-span original experiment datas protected and carried under the time
Step 2: carry out the high temperature low-cycle fatigue and creep test of TiAl alloy respectively.
For TiAl alloy material, the low cycle fatigue test of Stress Control under the conditions of 750 DEG C and 800 DEG C is carried out, has tested
Method is with reference to GB/T 15248-2008 standards《Metal material axial direction constant amplitude low-cycle fatigue test method》Perform, using stress
Control mode, stress ratio 0, tensile load 320MPa, Load-unload speed are 32MPa/s.High-temerature creep test method reference
GB/T 2039-2012 standards《Metal material simple tension creep test method》Perform, tensile load 320MPa.Table 2 is listed
TiAl alloy is in low-cycle fatigue and creep life original experiment data.Fig. 4, Fig. 5 sets forth TiAl alloy at 750 DEG C and
The curve that low-cycle fatigue, creep at 800 DEG C and the mean strain under the conditions of spleen tissue extracts interaction change over time, on curve
Time corresponding to maximum mean strain is low-cycle fatigue, creep and spleen tissue extracts the interaction life-span of material.It is noticeable
It is that the mean strain under high-temerature creep experimental condition refers to the average value of double extraction extensometer measurement creep strains.
The low-cycle fatigue of the TiAl alloy of table 2 and creep life original experiment data
Step 3: the material low-cycle fatigue carried out respectively according to step 1 and step 2, creep and spleen tissue extracts interaction examination
Test, determine effectively to protect load time △ t/tp accordingly by whetheing there is to protect the load time and protect load time length, table 3 lists TiAl conjunctions
Low-cycle fatigue, creep and the exhaustion creep interaction of gold, which are effectively protected, carries the time.
Low-cycle fatigue, creep and the exhaustion creep interaction of the TiAl alloy of table 3, which are effectively protected, carries the time
Step 4: the low-cycle fatigue for the material carried out according to step 1 and step 2, creep and spleen tissue extracts interaction examination
Test, to keep mutually unifying with the life-span that creep test obtains, the fatigue and cyclic number that low-cycle fatigue and spleen tissue extracts interact is converted
For the time in seconds, and creep and spleen tissue extracts interaction life-span are removed with the low-cycle fatigue life under corresponding conditionses
Method, obtain the normalization characteristic Tf/Tf-LCF in low-cycle fatigue, creep and spleen tissue extracts the interaction life-span of material.Table 4 arranges
Low-cycle fatigue, creep and spleen tissue extracts interaction life-span and its normalization characteristic of TiAl alloy are gone out.
Low-cycle fatigue, creep and exhaustion creep the interaction life-span of the TiAl alloy of table 4 and its normalization characteristic
Step 5: the low-cycle fatigue, creep and the fatigue that are determined in effective guarantor load time of step 3 determination and step 4-compacted
Become on the basis of the normalization characteristic in interaction life-span, establish the unified longevity of the power function form with non-linear sign ability
It is as follows to order Forecasting Methodology：
Step 6, the low-cycle fatigue established in step 5, creep and the unified life-span prediction method of spleen tissue extracts interaction, and
Effective guarantor that low-cycle fatigue, creep and the spleen tissue extracts of the material determined with reference to step 3 interact carries time △ t/tp and step
The normalization characteristic Tf/Tf-LCF of four low-cycle fatigue determined, creep and spleen tissue extracts interaction life-span, using a most young waiter in a wineshop or an inn
Multiply the material parameter that optimized algorithm obtains unified life-span prediction method.Table 5 lists the low-cycle fatigue of TiAl alloy, creep and tired
The material parameter and coefficient correlation of labor-unified life-span prediction method of creep interaction.When effective guarantor that Fig. 6 gives TiAl alloy carries
Between relation between the normalization characteristic in life-span is interacted with low-cycle fatigue, creep and spleen tissue extracts, it can be seen that this hair
The unified life-span prediction method of the power function form of bright proposition can effectively be protected with accurate characterization and carry returning for time △ t/tp and life-span
One changes the non-linear relation between characteristic, and simulation precision is higher.Fig. 7 gives TiAl alloy at different temperatures low
Contrast between all fatigue, creep and the unified life approach prediction result of spleen tissue extracts interaction and result of the test, it can be seen that
Life-span using unified life approach prediction is located within ± 2 times of dispersion trains of test life, and result of the test is non-with prediction result
It is often close.It is tired that unified life approach proposed by the present invention can be good at low week of the sign TiAl alloy at 750 DEG C and 800 DEG C
Labor, creep and spleen tissue extracts interaction life-span.
Low-cycle fatigue, creep and the spleen tissue extracts of the TiAl alloy of table 5 interact the material parameter of unified life-span prediction method
And coefficient correlation
Step 7, the low-cycle fatigue established in step 5, creep and the unified life-span prediction method of spleen tissue extracts interaction and step
On the basis of rapid six material parameters obtained, it is possible to achieve material low-cycle fatigue, creep and spleen tissue extracts are interacted with the unified life-span
Characterize and predict.The predictive ability of guarantor's load time effect is interacted to study unified life model to spleen tissue extracts, is carried out respectively
TiAl alloy is at 750 DEG C and 800 DEG C and protects the spleen tissue extracts interaction experiment for carrying that the time is 5s, 45s and 120s.Passing through will
Protect and carry time conversion into effective guarantor's load time, be brought into formula, the material ginseng in table 5 at 750 DEG C and 800 DEG C is respectively adopted
Number, the corresponding spleen tissue extracts interaction life-span protected and carried under time conditions can be calculated.Table 6 lists TiAl alloy and carried in different protect
Spleen tissue extracts interaction test life and bimetry under time conditions, Fig. 8 gives surveys different guarantors using unified life approach
Carry the contrast between the result of calculation and result of the test under the time.As can be seen that the life-span position using unified life approach prediction
Within ± 2 times of dispersion trains of test life, result of the test is very close with prediction result, and unified life approach can be accurately pre-
Survey TiAl alloy different spleen tissue extracts interaction life-spans for protecting the load time at 750 DEG C and 800 DEG C.Therefore, the low week based on material
Fatigue, creep and spleen tissue extracts interaction life-span, unified life approach proposed by the present invention is used arbitrarily to protect load with Accurate Prediction
The spleen tissue extracts interaction life-span of material under time conditions.
The TiAl alloy of table 6 is in different spleen tissue extracts interaction test life and the bimetries protected and carried under time conditions
Claims (2)
1. the characterizing method of a kind of fatigue of material, creep and spleen tissue extracts interaction unified life-span, the material is aeroplane engine
With structural material, it is characterised in that：Steps of the method are：
Step 1: carry out the different spleen tissue extracts friendships protected and carry time △ t under same temperature T and same tensile load σ to material
Interaction is tested, and the experiment uses Stress Control and stress ratio is 0, and guarantor carries the lasting rank for the time referring to tensile load peak value σ max
The section time；
Step 2: under the conditions of the temperature T and tensile load σ described in step 1, carry out the low week that Stress Control and stress ratio are 0
Fatigue test and creep test；
Step 3: low-cycle fatigue, creep and spleen tissue extracts interaction experiment based on material, are carried by whetheing there is to protect to carry the time and protect
Time length determines that corresponding effectively protect carries time △ ti/tp, wherein：
I=1,2,3 ... ..., n；N carries time △ t numbers to protect；
Tp is the circulation time of a complete load in low-cycle fatigue, creep and spleen tissue extracts interaction experiment；
Step 4: it is consistent for the life unit kept with creep test obtains, by low-cycle fatigue and spleen tissue extracts interaction experiment
Fatigue and cyclic number be converted into time in seconds, under the conditions of the gained time is temperature T described in step 1 and tensile load σ
The low-cycle fatigue of material and spleen tissue extracts interaction life-span；By described in the creep of material and spleen tissue extracts interaction life-span and step 1
The low-cycle fatigue life of material is divided by under the conditions of temperature T and tensile load σ, obtains the low-cycle fatigue, creep and fatigue of material-compacted
Become the normalization characteristic Tf/Tf-LCF in interaction life-span, wherein：Tf and Tf-LCF represents the rupture life of material and low respectively
All fatigue lives, unit are the second；
Step 5: carry low-cycle fatigue, the creep of time △ ti/tp and the material of step 4 determination in effective guarantor that step 3 determines
On the basis of the normalization characteristic Tf/Tf-LCF in spleen tissue extracts interaction life-span, establish with non-linear sign ability
The sign formula in the unified life-span of power function form：
<mrow>
<mfrac>
<msub>
<mi>T</mi>
<mi>f</mi>
</msub>
<msub>
<mi>T</mi>
<mrow>
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<mo>-</mo>
<mi>L</mi>
<mi>C</mi>
<mi>F</mi>
</mrow>
</msub>
</mfrac>
<mo>=</mo>
<mi>A</mi>
<mo>-</mo>
<mi>b</mi>
<msup>
<mrow>
<mo>(</mo>
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<mrow>
<mi>&Delta;</mi>
<mi>t</mi>
</mrow>
<msub>
<mi>t</mi>
<mi>p</mi>
</msub>
</mfrac>
<mo>)</mo>
</mrow>
<mi>n</mi>
</msup>
<mo>=</mo>
<mi>A</mi>
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<mi>b</mi>
<msup>
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<mo>(</mo>
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<mi>&Delta;</mi>
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In formula：Tl represents the load time, and A, b and n are the material parameters related to temperature；
Step 6: the numerical value that step 5 unifies A, b and n in the sign formula in life-span is obtained using Least-squares minimization algorithm.
2. the characterizing method of the fatigue of material according to claim 1, creep and spleen tissue extracts interaction unified life-span, its
It is characterised by：The value of the temperature T is higher than aeroplane engine with the 30% of structural material melting temperature.
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| CN108931448A (en) * | 2018-05-07 | 2018-12-04 | 华南理工大学 | A kind of prediction technique of high chrome Material Thermodynamics response and spleen tissue extracts damage |
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| CN110411851A (en) * | 2019-07-22 | 2019-11-05 | 北京科技大学 | A kind of high-temperature alloy turbine blade military service Damage Evaluation and creep life prediction technique |
| CN110955950A (en) * | 2018-09-25 | 2020-04-03 | 湖南工业大学 | Method for predicting fatigue life of weld joint under any stress ratio based on dissipated energy |
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| CN111948240A (en) * | 2020-08-17 | 2020-11-17 | 浙江祺跃科技有限公司 | In-situ high-temperature creep fatigue scanning electron microscope |
| CN112417580A (en) * | 2020-04-17 | 2021-02-26 | 中国航发北京航空材料研究院 | High-temperature low-cycle fatigue life prediction method considering load-holding effect |
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| CN113109192A (en) * | 2021-04-09 | 2021-07-13 | 中国航发北京航空材料研究院 | Titanium alloy load-holding fatigue life testing method based on load-holding response difference |
| CN113495032A (en) * | 2020-03-19 | 2021-10-12 | 上海电气电站设备有限公司 | Material creep fatigue life evaluation method and evaluation system |
| CN114239175A (en) * | 2021-12-17 | 2022-03-25 | 天津大学 | High-temperature structural member service life prediction method based on nonlinear creep-fatigue interaction |
| CN115931532A (en) * | 2022-12-30 | 2023-04-07 | 南京工业大学 | Electric power high-temperature component damage state judgment method based on modified time fraction method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010002261A (en) * | 2008-06-19 | 2010-01-07 | Toshiba Corp | Instrument life evaluation method and instrument life evaluation system |
| US20130191039A1 (en) * | 2012-01-23 | 2013-07-25 | Siemens Energy, Inc. | Method and system of deterministic fatigue life prediction for rotor materials |
| CN103344511A (en) * | 2013-07-01 | 2013-10-09 | 北京理工大学 | Method for predicting creep-fatigue service life of aluminum alloy piston of high-power diesel engine |
| CN103926152A (en) * | 2014-04-09 | 2014-07-16 | 北京工业大学 | Low-cycle creep and fatigue life evaluation method under conditions of high temperature and multiaxial spectrum load |
| CN104316388A (en) * | 2014-07-25 | 2015-01-28 | 中国航空工业集团公司北京航空材料研究院 | A fatigue lifetime measuring method for anisotropic material structural parts |
| CN105158084A (en) * | 2015-09-15 | 2015-12-16 | 华东理工大学 | Forecasting method for creep-fatigue life of material |
-
2017
- 2017-09-06 CN CN201710796885.4A patent/CN107677547B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010002261A (en) * | 2008-06-19 | 2010-01-07 | Toshiba Corp | Instrument life evaluation method and instrument life evaluation system |
| US20130191039A1 (en) * | 2012-01-23 | 2013-07-25 | Siemens Energy, Inc. | Method and system of deterministic fatigue life prediction for rotor materials |
| CN103344511A (en) * | 2013-07-01 | 2013-10-09 | 北京理工大学 | Method for predicting creep-fatigue service life of aluminum alloy piston of high-power diesel engine |
| CN103926152A (en) * | 2014-04-09 | 2014-07-16 | 北京工业大学 | Low-cycle creep and fatigue life evaluation method under conditions of high temperature and multiaxial spectrum load |
| CN104316388A (en) * | 2014-07-25 | 2015-01-28 | 中国航空工业集团公司北京航空材料研究院 | A fatigue lifetime measuring method for anisotropic material structural parts |
| CN105158084A (en) * | 2015-09-15 | 2015-12-16 | 华东理工大学 | Forecasting method for creep-fatigue life of material |
Non-Patent Citations (5)
| Title |
|---|
| VASISHT VENKATESH ET AL.: "A neural network approach to elevated temperature creep-fatigue life prediction", 《INTERNATIONAL JOURNAL OF FATIGUE》 * |
| 于慧臣 等: "一种TiAl合金的高温蠕变和疲劳行为及其寿命预测方法", 《金属学报》 * |
| 张国栋 等: "DZ125定向凝固合金疲劳-蠕变性能与寿命预测研究", 《失效分析与预测》 * |
| 范志超 等: "基于延性耗竭理论的疲劳蠕变寿命预测方法", 《金属学报》 * |
| 陈学东 等: "三种疲劳蠕变交互作用寿命预测模型的比较及其应用", 《机械工程学报》 * |
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| CN112730092A (en) * | 2020-12-24 | 2021-04-30 | 南京航空航天大学 | Creep load equivalent acceleration method based on failure mode consistency |
| US11965861B2 (en) | 2020-12-24 | 2024-04-23 | Nanjing University Of Aeronautics And Astronautics | Equivalent acceleration method of creep loads based on consistent failure mode |
| CN113109192A (en) * | 2021-04-09 | 2021-07-13 | 中国航发北京航空材料研究院 | Titanium alloy load-holding fatigue life testing method based on load-holding response difference |
| CN114239175A (en) * | 2021-12-17 | 2022-03-25 | 天津大学 | High-temperature structural member service life prediction method based on nonlinear creep-fatigue interaction |
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