CN106568661A - Testing acquisition method of epsilon-N fatigue curve under rubber material typical bearing working conditions - Google Patents
Testing acquisition method of epsilon-N fatigue curve under rubber material typical bearing working conditions Download PDFInfo
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
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Abstract
The invention discloses a testing acquisition method of epsilon-N fatigue curve under rubber material typical bearing working conditions. The testing acquisition method comprises following steps: three basic straining ratios are determined, testing of three test data points of each of the basic straining ratio is carried out, model construction of test samples is carried out, and simulating calculation of the relation curve of the bearing of rubber test samples with principal strain is carried out; fatigue load spectrum conditions of fatigue test are determined; the relationship data of fatigue numbers with fatigue strain when fatigue failure of the rubber test samples is observed in fatigue test is recorded, and is introduced into a fatigue equation for fitting so as to obtain the fatigue parameters of the rubber material under the three basic straining ratios; the fatigue equation is used for calculating fatigue data, and obtaining the epsilon-N fatigue curve under the three basic straining ratios based on the fatigue parameters. The testing acquisition method possesses following advantages: less test support is needed, and application range is wide.
Description
Technical field
The present invention relates to the testing of materials and analytical technology of rubber absorber, and in particular to a kind of elastomeric material typical case holds
Carry the ε～N fatigue curve test acquisition methods under operating mode.
Background technology
Elastomeric material is widely used in track traffic, vapour due to its good elastic behavior and excellent fatigue behaviour
Car transport and engineering machinery etc. subtract vibration isolation field, achieve good application effect.During the actual military service of rubber element,
Small part rubber element is forced in advance more due to occurring in that serious Fatigue Damage Problem before projected life is reached far away
Change, also there are many rubber elements after the military service cycle is reached, find during replacing that product is still intact, or even can also make for a long time
With, therefore, there is the situation of significantly deviation with projected life in both, cause the different degrees of wasting of resources and property
Loss, particularly the service life of rubber element reaches far away the situation of projected life, even more faces the wind for security incident occur
Danger.
Design research and development rubber absorber, can generally individually be related to two technology corners, i.e. rigidity and fatigue, thus, essence
The fatigue life for holding rubber element accurately be exploitation rubber compounding, design research and development rubber element whether successfully key technology it
One, and the fatigue life of success prediction rubber element then needs the ε～N fatigue curve data for relying on elastomeric material as which
Support, and the fatigue life of elastomeric material, it is not only related to its repeated strain width, but also affected by its mean strain, therefore,
No matter in theoretical research, or in engineer applied, (carrying is followed for test, design and drafting elastomeric material typical case strain ratio
The ratio of its minimum strain and maximum strain under the ring cycle) under ε～N fatigue curve (under same strain ratio, differently strained width with
The relation curve of its corresponding fatigue life) data, have very important significance.
To obtain tired ε～N fatigue curve of the elastomeric material under typical strain ratio operating mode, existing technical scheme is,
Post is tried by dumbbell shape rubber experiment, based on same strain ratio, fatigue life is directly tested tired under 10,000 times～10,000,000 times
Labor life-span and the combination of strain amplitude, typically directly during experimental test, the fatigue life is distributed by experimental test is about：10000 times；
100000 times；500000 times；1000000 times；1500000 times；2000000 times；3000000 times；4000000 times；5000000 times；6000000 times；8000000
It is secondary；10000000 times, about totally 12 data points.But, there are following shortcomings in the technical scheme：
(I) directly test expends substantial amounts of experimentation cost, directly test same strain ratio, fatigue life from 10,000 times～
The combination of the corresponding strain amplitude of times of fatigue under 10000000 times, the ε～N fatigue datas completed under a strain ratio are bent
Line, theoretical demand test 12 data points, and the accumulative total degree of testing fatigue reaches 40,000,000 times, and test job amount is huge, no
Only need to prepare substantial amounts of rubber experiment sample, and take testing equipment for a long time, affect the development of other projects.
(II) discreteness that straightway testing test shows results in the need for substantial amounts of replica test, rubber fatigue test table
Reveal obvious discreteness, to guarantee the stability of fatigue data, test same fatigue data point, at least need to repeat to survey
Examination 3 times and more than, therefore, complete the experimental test of the tired ε～N fatigue curve data under a strain ratio, theoretical demand enters
36 fatigue tests of row, tired total degree reach 1.2 hundred million times and more than.
(III) testing fatigue of long time period is difficult to the needs for meeting Formula Development and research and development of products, generally a kind of rubber
Glue material, need test three groups of strain ratioes (0, a (between 0～-1), -1) under ε～N fatigue curve data, and completely complete this three
The experimental test of the ε～N fatigue curve data under strain ratio is planted, if tested only with an equipment, is needed up to 2 years
Test period, and in order to shorten the test period, even if being carried out using multiple devices while testing, the relative cycle of its test
It is difficult to receive, thus the needs of Formula Development and rubber shock-absorbing product exploitation cannot be met.
The content of the invention
The technical problem to be solved in the present invention：For tired to obtain elastomeric material completely by direct experimental test at present
Labor ε～N curve datas, the test period spent by which are long, take the of long duration of testing equipment, it is impossible to provide fatigue data in time
To meet the deficiency of Formula Development and research and development of products needs, there is provided test needed for a kind of is supported less, the rubber material of applied range
Material typical case carries the ε～N fatigue curve test acquisition methods under operating mode.
In order to solve above-mentioned technical problem, the technical solution used in the present invention is：
A kind of elastomeric material typical case carries the ε～N fatigue curve test acquisition methods under operating mode, and step includes：
1) three basic strain ratioes of fatigue test are determined according to the practical application operating mode of elastomeric material；
2) test of three test data points is carried out for each basic strain ratio, and three test data point correspondences is not
Same preset fatigue load-up condition；
3) rubber experiment sample is modeled, the magnitude of load of simulation calculation rubber experiment sample is corresponding with principal strain
Relation, obtains the relation curve between the load and principal strain of rubber experiment sample；
4) determine carry out fatigue test fatigue load spectral condition, calculate rubber experiment sample under typical strain ratio most
Big strain and minimum strain, find maximum strain and minimum from the relation curve of the load and its principal strain of rubber experiment sample
The corresponding load value of strain, so that it is determined that going out the fatigue load spectrum of fatigue test；
5) fatigue test is carried out according to the fatigue load spectrum, fatigue mistake occurs in rubber experiment sample during record fatigue test
The relation data between times of fatigue and repeated strain during effect；
6) relation data between times of fatigue and repeated strain when rubber experiment sample fatigue failure occurring is brought into
Fatigue equation shown in formula (1), and it is fitted solution acquisition damage parameters of the elastomeric material under three basic strain ratioes；
In formula (1), εRRepresent the principal strain of rubber experiment sample zone line, NRRepresent rubber experiment sample zone line
Principal strain corresponding to times of fatigue, Np represents the damage parameters of fatigue life, and ε p represent elastomeric material repeated strain characteristic
Damage parameters, Mp represents the fatigue exponent of elastomeric material fatigue properties；
7) damage parameters according to elastomeric material under three basic strain ratioes, using the fatigue equation meter shown in formula (2)
Fatigue data of the elastomeric material between 10,000 times～10,000,000 times under the different fatigue life-span is calculated, elastomeric material is obtained tired at 12
Strain amplitude ε under labor pointAWith the composition of relations of fatigue life N, the strain amplitude ε according to elastomeric material under 12 fatigue pointsAWith it is tired
The composition of relations of labor life-span N generates tired ε～N fatigue curve of the elastomeric material under three basic strain ratioes；
In formula (2), εRRepresent the principal strain of rubber experiment sample zone line, NRRepresent rubber experiment sample zone line
Principal strain corresponding to times of fatigue, Np represents the damage parameters of fatigue life, and ε p represent elastomeric material repeated strain characteristic
Damage parameters, Mp represents the fatigue exponent of elastomeric material fatigue properties.
Preferably, step 1) in elastomeric material specifically refer to vulcanized rubber material, it is determined that three basic strain ratioes in,
First strain ratio λ is set to 0, and second strain ratio ε is set to -1, and the 3rd strain ratio β is between 0～-1.
Preferably, step 2) in preset fatigue load-up condition specifically refer to：For three basic strain ratio λ, β and ε, strain
Repeated strain width when being 0 than λ is：1.4,0.8；0.4；Strain ratio be β when repeated strain width be：1.5,0.9；0.5；Strain
Repeated strain width when being -1 than ε is：1.6,1.0；0.6.
Preferably, step 4) the middle letter for calculating maximum strain and minimum strain of the rubber experiment sample under typical strain ratio
Shown in number expression formula such as formula (3)；
In formula (3), εmaxMaximum strain of the rubber experiment sample under typical strain ratio is represented, R represents strain ratio, εATable
Show strain amplitude of the rubber experiment sample under typical strain ratio, εminRepresent minimum of the rubber experiment sample under typical strain ratio
Strain.
Preferably, step 5) detailed step include：
5.1) fatigue loading conditions according to the design fatigue test, the fatigue loading conditions include multiple test sequences
Row, the information of the Test Sequences include strain ratio R, strain amplitude εA, fatigue load spectrum and test number (TN)；
5.2) fatigue loading conditions according to design, on special fatigue test machine, carry out fatigue to rubber fatigue sample
It is 1～10Hz that the operating mode of test and fatigue test is test frequency, and test temperature is 22 DEG C ± 3 DEG C；In process of the test, for
The test each time of each Test Sequences, stops this at once when the immediate movement width of rubber experiment sample exceedes pre-conditioned
Secondary test, and the results averaged that most each test of the Test Sequences is obtained at last is used as the fatigue test of the Test Sequences
As a result；
Preferably, step 5.2) in the immediate movement width of rubber experiment sample exceed and pre-conditioned specifically refer to meet formula
(4) functional relationship shown in；
In formula (4), δtRepresent the immediate movement width of rubber experiment sample, δ0Represent the initial displacement width of rubber experiment sample.
ε～N fatigue curve test acquisition methods tool that elastomeric material typical case of the present invention is carried under operating mode has the advantage that：This
Invention only needs 9 test data points under three strain ratioes to carry out direct fatigue test test, by ε～N fatigue sides
Journey fitting is solved and obtains ε～N damage parameters, recycles the data processing softwares such as excel draw out elastomeric material at three
Tired ε～N fatigue curve under test strain ratio, it is only necessary to which less test be drawn out elastomeric material by supporting and be held in typical case
The complete tired ε～N fatigue curve under operating mode is carried, is mainly used in the design of tired ε～N fatigue curve of vulcanized rubber material
And draw, it is particularly suitable for vulcanite of the shore hardness between 50 °～65 °, while being also applied for the tired of polyurethane damping material
The design and drafting of labor ε～N fatigue curve, have the advantages that it is required test support less, applied range.
Description of the drawings
Basic procedure schematic diagrams of the Fig. 1 for present invention method.
Fig. 2 is the structure chart of rubber experiment sample in the embodiment of the present invention
Fig. 3 is the illustraton of model of rubber experiment sample in the embodiment of the present invention.
Fig. 4 is the affiliated area schematic diagram of the repeated strain of rubber experiment sample in the embodiment of the present invention.
Fig. 5 is the relation curve of the load with its principal strain of rubber experiment sample in the embodiment of the present invention.
Fig. 6 is tired ε～N fatigue curve of the elastomeric material under three basic strain ratioes in the embodiment of the present invention.
Specific embodiment
Referring to Fig. 1, the present embodiment elastomeric material typical case carries the step that the ε～N fatigue curve under operating mode tests acquisition methods
Suddenly include：
1) three basic strain ratioes of fatigue test are determined according to the practical application operating mode of elastomeric material；
In the present embodiment, step 1) in elastomeric material specifically refer to vulcanized rubber material, it is determined that three basic strain
Than in, first strain ratio λ is set to 0, and second strain ratio ε is set to -1, and the 3rd strain ratio β is between 0～-1, and
The occurrence of the 3rd basic strain ratio is that rubber material is determined according to the practical application operating mode of elastomeric material, by Finite Element Method
The strain ratio substantially that material may be born in actual applications is obtained.
2) test of three test data points is carried out for each basic strain ratio, and three test data point correspondences is not
Same preset fatigue load-up condition；
In the present embodiment, step 2) in preset fatigue load-up condition specifically refer to：For three basic strain ratio λ, β and ε,
Repeated strain width when strain ratio λ is 0 is：1.4,0.8；0.4；Strain ratio be β when repeated strain width be：1.5,0.9；0.5；
Repeated strain width when strain ratio ε is -1 is：1.6,1.0；0.6.
3) rubber experiment sample is modeled, the magnitude of load of simulation calculation rubber experiment sample is corresponding with principal strain
Relation, obtains the relation curve between the load and principal strain of rubber experiment sample；
In the present embodiment, rubber experiment sample is specially the structure (as shown in Figure 2) that dumbbell shape rubber tries post, its height A
For 50mm, minimum diameter B is 30mm, and the radius C of round sides is 36mm, (can also adopt which in addition using ABAQUS softwares
His general finite element software) finite element modeling is carried out, the model of the rubber experiment sample for obtaining is as shown in Figure 3.Utilize
ABAQUS softwares are solved and are calculated, and with load as vertical coordinate, with the principal strain on the rubber fatigue sample middle region in Fig. 4 are
Abscissa, wherein A be elongation strain state, C be compression strain state, the incremental step with 10N as power, draw out load for-
Load between 1000N～1000N is as shown in Figure 5 with the relation curve of its principal strain.
4) determine carry out fatigue test fatigue load spectral condition, calculate rubber experiment sample under typical strain ratio most
Big strain and minimum strain, find maximum strain and minimum from the relation curve of the load and its principal strain of rubber experiment sample
The corresponding load value of strain, so that it is determined that going out the fatigue load spectrum of fatigue test；
In the present embodiment, step 4) middle calculating maximum strain and minimum strain of the rubber experiment sample under typical strain ratio
Function expression such as formula (3) shown in；
In formula (3), εmaxMaximum strain of the rubber experiment sample under typical strain ratio is represented, R represents strain ratio, εATable
Show strain amplitude of the rubber experiment sample under typical strain ratio, εminRepresent minimum of the rubber experiment sample under typical strain ratio
Strain.
5) fatigue test is carried out according to fatigue load spectrum, when fatigue failure occurs in rubber experiment sample during record fatigue test
Times of fatigue and repeated strain between relation data；
In the present embodiment, step 5) detailed step include：
5.1) fatigue loading conditions of fatigue test are designed, fatigue loading conditions include multiple Test Sequences, Test Sequences
Information include strain ratio R, strain amplitude εA, fatigue load spectrum and test number (TN)；In the present embodiment, fatigue loading conditions are specifically such as
Shown in table 1；
Table 1：The fatigue loading conditions of fatigue test.
According to the Test Sequences in table 1, its maximum strain and the maximum load corresponding to minimum strain are found out from Fig. 5
Fmax (i) and minimum load Fmin (i), as the input of fatigue load spectrum in table 1.For example, for Test Sequences 1, which is from Fig. 5
In find out its maximum strain and maximum load Fmax (1) and minimum load Fmin (1) corresponding to minimum strain, the like.
5.2) fatigue loading conditions according to design, on special fatigue test machine, carry out fatigue to rubber fatigue sample
It is 1～10Hz that the operating mode of test and fatigue test is test frequency, and test temperature is 22 DEG C ± 3 DEG C；In process of the test, for
The test each time of each Test Sequences, stops this at once when the immediate movement width of rubber experiment sample exceedes pre-conditioned
Secondary test, and the results averaged that most each test of the Test Sequences is obtained at last is used as the fatigue test of the Test Sequences
As a result；Understand referring to table 1, the test number (TN) in the present embodiment under each Test Sequences is 3, therefore by the Test Sequences
Fatigue test results of the results averaged that 3 tests are obtained as the Test Sequences；
In the present embodiment, step 5.2) in the immediate movement width of rubber experiment sample exceed and pre-conditioned specifically refer to meet
Functional relationship shown in formula (4)；
In formula (4), δtRepresent the immediate movement width of rubber experiment sample, δ0Represent the initial displacement width of rubber experiment sample.
6) relation data between times of fatigue and repeated strain when rubber experiment sample fatigue failure occurring is brought into
Fatigue equation shown in formula (1), and it is fitted solution acquisition damage parameters of the elastomeric material under three basic strain ratioes；
In formula (1), εRRepresent the principal strain of rubber experiment sample zone line, NRRepresent rubber experiment sample zone line
Principal strain corresponding to times of fatigue, Np represents the damage parameters of fatigue life, and ε p represent elastomeric material repeated strain characteristic
Damage parameters, Mp represents the fatigue exponent of elastomeric material fatigue properties；
In the present embodiment specifically using Matlab softwares fitting solution acquisition elastomeric material under three basic strain ratioes
Damage parameters, the damage parameters table for finally giving is as shown in table 2；
| Strain ratio | εp | Np | Mp |
| 0 | εp1 | Np1 | Mp1 |
| β (- 1～0) | εp2 | Np2 | Mp2 |
| -1 | εp3 | Np3 | Mp3 |
7) damage parameters according to elastomeric material under three basic strain ratioes, using the fatigue equation meter shown in formula (2)
Fatigue data of the elastomeric material between 10,000 times～10,000,000 times under the different fatigue life-span is calculated, elastomeric material is obtained tired at 12
Strain amplitude ε under labor pointAWith the composition of relations of fatigue life N (as shown in table 3), according to elastomeric material under 12 fatigue points
Strain amplitude εAIt is tired that tired ε～N of the elastomeric material under three basic strain ratioes is generated respectively with the composition of relations of fatigue life N
Curve, as shown in Figure 6；
In formula (2), εRRepresent the principal strain of rubber experiment sample zone line, NRRepresent rubber experiment sample zone line
Principal strain corresponding to times of fatigue, Np represents the damage parameters of fatigue life, and ε p represent elastomeric material repeated strain characteristic
Damage parameters, Mp represents the fatigue exponent of elastomeric material fatigue properties.
Table 3：Strain amplitude ε of the elastomeric material under 12 fatigue pointsAWith the composition of relations of fatigue life N.
To sum up, ε～N fatigue curve test acquisition methods that the present embodiment elastomeric material typical case is carried under operating mode are a kind of answering
Design and method for drafting for the ε～N fatigue curve under elastomeric material typical case's strain ratio, the present embodiment elastomeric material typical case hold
Carrying the test acquisition methods of the ε～N fatigue curve under operating mode needs to carry out directly 9 test data points under three typical strain ratioes
The fatigue test test for connecing, and ε～N damage parameters that solution is calculated elastomeric material are fitted by ε～N fatigue equations, then
Using data processing softwares such as excel, elastomeric material is drawn at three with strain amplitude as abscissa, by vertical coordinate of fatigue life
Tired ε～N curves under test strain ratio.ε～N fatigue curve test that the present embodiment elastomeric material typical case is carried under operating mode is obtained
The method of taking can effectively overcome tradition to obtain elastomeric material fatigue ε～N fatigue curve numbers completely by direct experimental test
According to, the test period spent by which is long, take testing equipment it is of long duration, it is impossible to meet Formula Development and research and development of products needs and
When rely on the deficiency of fatigue data etc., have the advantages that required test support less, applied range.
The above is only the preferred embodiment of the present invention, and protection scope of the present invention is not limited merely to above-mentioned enforcement
Example, all technical schemes belonged under thinking of the present invention belong to protection scope of the present invention.It should be pointed out that for the art
Those of ordinary skill for, some improvements and modifications without departing from the principles of the present invention, these improvements and modifications
Should be regarded as protection scope of the present invention.
Claims (6)
1. a kind of elastomeric material typical case carries the ε～N fatigue curve test acquisition methods under operating mode, it is characterised in that step bag
Include：
1) three basic strain ratioes of fatigue test are determined according to the practical application operating mode of elastomeric material；
2) test of three test data points is carried out for each basic strain ratio, and three test data point correspondences is different
Preset fatigue load-up condition；
3) rubber experiment sample is modeled, the magnitude of load of simulation calculation rubber experiment sample is corresponding with principal strain to close
System, obtains the relation curve between the load and principal strain of rubber experiment sample；
4) determine the fatigue load spectral condition for carrying out fatigue test, calculating maximum of the rubber experiment sample under typical strain ratio should
Become and minimum strain, maximum strain and minimum strain are found from the relation curve of the load and its principal strain of rubber experiment sample
Corresponding load value, so that it is determined that going out the fatigue load spectrum of fatigue test；
5) fatigue test is carried out according to the fatigue load spectrum, when fatigue failure occurs in rubber experiment sample during record fatigue test
Times of fatigue and repeated strain between relation data；
6) relation data between times of fatigue and repeated strain when rubber experiment sample fatigue failure occurring brings formula (1) into
Shown fatigue equation, and it is fitted solution acquisition damage parameters of the elastomeric material under three basic strain ratioes；
In formula (1), εRRepresent the principal strain of rubber experiment sample zone line, NRRepresent the master of rubber experiment sample zone line
The corresponding times of fatigue of strain, Np represent the damage parameters of fatigue life, and ε p represent the tired of elastomeric material repeated strain characteristic
Labor parameter, Mp represent the fatigue exponent of elastomeric material fatigue properties；
7) damage parameters according to elastomeric material under three basic strain ratioes, are calculated using the fatigue equation shown in formula (2)
Fatigue data of the elastomeric material between 10,000 times～10,000,000 times under the different fatigue life-span, obtains elastomeric material in 12 fatigue points
Under strain amplitude εAWith the composition of relations of fatigue life N, the strain amplitude ε according to elastomeric material under 12 fatigue pointsAWith the tired longevity
The composition of relations of life N generates tired ε～N fatigue curve of the elastomeric material under three basic strain ratioes；
In formula (2), εRRepresent the principal strain of rubber experiment sample zone line, NRRepresent the master of rubber experiment sample zone line
The corresponding times of fatigue of strain, Np represent the damage parameters of fatigue life, and ε p represent the tired of elastomeric material repeated strain characteristic
Labor parameter, Mp represent the fatigue exponent of elastomeric material fatigue properties.
2. ε～N fatigue curve test the acquisition methods under operating mode are carried according to the elastomeric material typical case described in claim 1,
Characterized in that, step 1) in elastomeric material specifically refer to vulcanized rubber material, it is determined that three basic strain ratioes in, first
Individual strain ratio λ is set to 0, and second strain ratio ε is set to -1, and the 3rd strain ratio β is between 0～-1.
3. ε～N fatigue curve test the acquisition methods under operating mode are carried according to the elastomeric material typical case described in claim 2,
Characterized in that, step 2) in preset fatigue load-up condition specifically refer to：For three basic strain ratio λ, β and ε, strain ratio λ
For 0 when repeated strain width be：1.4,0.8；0.4；Strain ratio be β when repeated strain width be：1.5,0.9；0.5；Strain ratio ε
For -1 when repeated strain width be：1.6,1.0；0.6.
4. ε～N fatigue curve test the acquisition methods under operating mode are carried according to the elastomeric material typical case described in claim 1,
Characterized in that, step 4) the middle function table for calculating maximum strain and minimum strain of the rubber experiment sample under typical strain ratio
Up to formula such as formula (3) Suo Shi；
In formula (3), εmaxMaximum strain of the rubber experiment sample under typical strain ratio is represented, R represents strain ratio, εARepresent rubber
Strain amplitude of the test sample under typical strain ratio, εminRepresent minimum strain of the rubber experiment sample under typical strain ratio.
5. ε～N fatigue curve test the acquisition methods under operating mode are carried according to the elastomeric material typical case described in claim 1,
Characterized in that, step 5) detailed step include：
5.1) fatigue loading conditions of fatigue test are designed, the fatigue loading conditions include multiple Test Sequences, the test
The information of sequence includes strain ratio R, strain amplitude εA, fatigue load spectrum and test number (TN)；
5.2) fatigue loading conditions according to design, on special fatigue test machine, carry out fatigue test to rubber fatigue sample
And the operating mode of fatigue test is that test frequency is 1～10Hz, test temperature is 22 DEG C ± 3 DEG C；In process of the test, for each
The test each time of individual Test Sequences, stops this examination at once when the immediate movement width of rubber experiment sample exceedes pre-conditioned
Test, and the results averaged that most each test of the Test Sequences is obtained at last is used as the fatigue test knot of the Test Sequences
Really.
6. ε～N fatigue curve test the acquisition methods under operating mode are carried according to the elastomeric material typical case described in claim 5,
Characterized in that, step 5.2) in the immediate movement width of rubber experiment sample exceed and pre-conditioned specifically refer to meet formula (4) institute
The functional relationship shown；
In formula (4), δtRepresent the immediate movement width of rubber experiment sample, δ0Represent the initial displacement width of rubber experiment sample.
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| CN110398430A (en) * | 2019-07-19 | 2019-11-01 | 武汉钢铁有限公司 | The full Strain life Curve test method of metal material constant amplitude |
| CN111693387A (en) * | 2020-06-15 | 2020-09-22 | 一汽解放汽车有限公司 | Method for determining minimum number of rapid fatigue tests |
| CN113281069A (en) * | 2021-06-16 | 2021-08-20 | 中国第一汽车股份有限公司 | Method, device and medium for improving load precision of automobile rubber bushing endurance test |
| CN113409900A (en) * | 2021-06-18 | 2021-09-17 | 广东技术师范大学 | Method and device for acquiring strain-life characteristic curve of rubber material |
| CN115112503A (en) * | 2022-06-27 | 2022-09-27 | 广东技术师范大学 | Method for acquiring probability fatigue life curve of rubber material |
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