CN106197915A - A kind of position the method that oscillating aging controls timeliness part fatigue life - Google Patents
A kind of position the method that oscillating aging controls timeliness part fatigue life Download PDFInfo
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- CN106197915A CN106197915A CN201610467502.4A CN201610467502A CN106197915A CN 106197915 A CN106197915 A CN 106197915A CN 201610467502 A CN201610467502 A CN 201610467502A CN 106197915 A CN106197915 A CN 106197915A
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- Prior art keywords
- timeliness
- residual stress
- timeliness part
- region
- oscillating aging
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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
- G01M7/00—Vibration-testing of structures; Shock-testing of structures
- G01M7/02—Vibration-testing by means of a shake table
-
- 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
Abstract
The present invention is a kind of to position the method that oscillating aging controls timeliness part fatigue life, and it comprises the steps of: (1) determines the timeliness region of timeliness part；(2) timeliness part is carried out model analysis, the preferably vibration shape, make timeliness region consistent with tired region；(3) mode of being installed and excited frequency are determined according to the selected vibration shape；(4) change exciting force size, timeliness region is carried out dynamic stress rest；(5) residual stress test before timeliness region being shaken；(6) according to (4), different exciting forces is selected to carry out oscillating aging respectively；(7) residual stress test after timeliness region being shaken, and the result obtained with (5) contrasts；(8) fatigue experiment is carried out, it is thus achieved that under the fixing vibration shape, fixing excited frequency, the fatigue life of timeliness part after different exciting force oscillating agings.The dynamic stress of oscillating aging is tested by the present invention, it is to avoid the blindness of oscillating aging, and highly versatile, and achievement in research reliability is high.
Description
Technical field
The present invention relates to a kind of position the method that oscillating aging controls timeliness part fatigue life, be research location oscillating aging
And the control method that technological parameter is to timeliness part fatigue life.The invention belongs to the control of product quality technique in machine-building
Technical field.
Background technology
Along with the fast development of modern aerospace industry and being growing more intense of internationalization competition, each main military affairs in the world are strong
State is proposed the highest requirement to the performance of various aircraft.To this end, the structure at the aircraft such as aircraft, rocket designs and system
In making, some large and complex structure parts (can be as big as several meters), and especially main force support structure part is (such as the crossbeam of aircraft, dividing plate, wall
Plate；The trousers of rocket, nacelle and strategic arms explosive assembly casing etc.) commonly used integrated structure design.But, large-scale
Integral structure component, especially thin-walled workpiece, often occur asking of machining deformation and dimension overproof in mechanical processing process
Topic, directly result in workpiece scrap, the adverse consequences such as construction delay.Scientific research result shows, the primary factor causing these problems is
The residual stress of inside workpiece skewness.Vibration aging technology, is to promote Workpiece vibration under external periodic force effect, makes structure
Part produces certain plastic deformation, and residual stress is relaxed therewith, so that the dimensionally stable of component gets off.Oscillating aging is
The one grown up after natrual ageing and heat aging ageing technique green, efficient.During with traditional heat aging and nature
Effect is compared, and vibration aging technology not only has with short production cycle, and occupation area of equipment is little, and processing mode is flexible, produce and
The advantages such as cost of investment is low, environmental protection, but also there is the highest Social benefit and economic benefit.But, oscillating aging
" tired " has an identical load character, the academia long-term existence fatigue life of workpiece " oscillating aging can or can not reduce "
Arguement, forbids that oscillating aging is applied to bear on the workpiece of fatigue load the most virtually.
Summary of the invention
1, purpose
It is an object of the invention to provide and a kind of position the method that oscillating aging controls timeliness part fatigue life, with for need not
Material, without the timeliness part of version, the impact on timeliness part fatigue life of the research location oscillating aging, eliminate people to shaking
The suspection of dynamic aging technique.
2, technical scheme
Present invention employs following technical scheme:
Analyze the residual stress distribution of timeliness part, determine that timeliness part needs the region of timeliness；
For the structural member of multi-form, determine the vibration mode of structural member, make the timeliness region of timeliness part and tired district
Territory is consistent；
Owing to dynamic stress plays vital effect in oscillating aging, in order to improve the versatility of the present invention, need
The structural member timeliness region dynamic stress when different vibration parameters oscillating aging is tested；
Determine the application mode evaluating oscillating aging homogenizing residual stress effect, complete the early stage residual stress of oscillating aging
Test；
According to dynamic stress rest result, different vibration parameters is selected to carry out oscillating aging respectively；
Carry out the residual stress test after oscillating aging, evaluate the different vibration parameters oscillating aging homogenizing to residual stress
Effect；
Pass through fatigue experiment, it is thus achieved that timeliness part situation fatigue life after different vibration parameters oscillating agings, be thus
Oscillating aging is applied to bear the workpiece of fatigue load and provides preferable vibration parameters, eliminates the people bosom to Vibration Aging Process
Doubt.
In sum, the present invention is a kind of positions the method that oscillating aging controls timeliness part fatigue life, and the method specifically walks
Rapid as follows:
Step one: according to material and the version of timeliness part, and according to residual stress test warp during production practices
Test and combine Finite Element Numerical Simulation, analyze the regularity of distribution of timeliness part residual stress, determine that timeliness part needs the region of timeliness；
Step 2: timeliness part is carried out model analysis, the preferably vibration shape, makes the timeliness region of timeliness part and tired region one
Cause；
Step 3: determine timeliness part installation form and excited frequency according to the vibration shape selected by step 2；
Step 4: foil gauge is attached to the timeliness region of timeliness part, according to step 3, is installed on vibration platen by timeliness part
On, fixing excited frequency, change exciting force size, utilize dynamic strain measuring instrument and data collecting system record dynamic strain number
According to, calculate dynamic stress (being not limited to this kind of dynamic stress rest method) according to dynamic strain data；
Step 5: a collection of timeliness part is grouped, and its packet situation is identified.Some are chosen from often group
Timeliness part is also numbered, and uses boring method, layer stripping, X-ray diffraction method, neutron diffraction method (to be not limited to this several remnants
Stress test method) timeliness part carried out residual stress test before oscillating aging；
Step 6: by corresponding with step 5 for the Packet State of timeliness part, according to the installation form identical with step 4, according to
The dynamic stress data that step 4 obtains, select different exciting forces that the timeliness part of difference group is carried out oscillating aging respectively, vibration
Time is certain；
Step 7: for quantitative assessment residual stress homo-effect, the timeliness part that step 5 is chosen from each group time
Effect region carries out residual stress test after oscillating aging；
Step 8: the timeliness part of different vibrational states is carried out fatigue experiment (draw-press, La-draw, reverse, the fatigue such as bending
Experiment), it is thus achieved that the fatigue life under fixing excited frequency, after different exciting force oscillating agings；
Wherein, " foil gauge is attached to the timeliness region of timeliness part, according to step 3, by timeliness part described in step 4
It is installed on vibration platen, fixing excited frequency, changes exciting force size, utilize dynamic strain measuring instrument and data collecting system
Record dynamic strain data, calculate dynamic stress according to dynamic strain data ", it is as follows that it implements process: will strain with 502 glue
Sheet is attached to the timeliness region of timeliness part, is connected by port wire corresponding with dynamic strain measuring instrument for foil gauge, and will dynamically
Strain testing instrument and data collecting system connect, and data collecting system is connected with computer, then fix excited frequency, change exciting
Power size, records dynamic strain data in vibration processes.Principal stress is calculated, by the 4th intensity finally according to mechanics of materials formula
Theoretical Calculation goes out equivalence dynamic stress；
Wherein, " a collection of timeliness part is grouped, and its packet situation is identified described in step 5.From often
Group chosen some timeliness parts and is numbered, using boring method, layer stripping, X-ray diffraction method, neutron diffraction method (not office
It is limited to this several residual stress test methods) timeliness part is carried out residual stress test before oscillating aging ", it implements process
As follows: a collection of timeliness part to be divided into some groups, and its vibrational state is identified, be divided into A, B, C ... wait group, then from
Each group is chosen several timeliness parts and by its numbered A-1, A-2, A-3 ..., use boring method, layer stripping, X-ray
Diffraction approach, neutron diffraction method (being not limited to this several residual stress test methods) are remaining before timeliness part carries out oscillating aging should
Power is tested, and before shaking, residual stress test can a testing time-effectiveness part surface residual stress, it is also possible to testing time-effectiveness part surface and
It is perpendicular to the residual stress in timeliness part case depth direction；
Wherein, described in step 8 " identified timeliness part is carried out fatigue experiment (draw-press, La-draw, reverse, curved
The fatigue experiments such as song), it is thus achieved that under fixing excited frequency, the fatigue life after different exciting force oscillating agings ", it implemented
Journey is as follows: the method utilizing lifting and lowering method to combine with method in groups, draws out the S-N curve of every kind of vibrational state.
3, advantage and effect
(1) present invention according to residual stress test experience during production practices and combines Finite Element Numerical Simulation, analyzes
The regularity of distribution of timeliness part residual stress, the preferably vibration shape, make the timeliness region of timeliness part consistent with tired region, it is to avoid vibration
The blindness of timeliness；
(2) the present invention is directed to different Parameters of Vibration Agings and carried out dynamic stress rest, for actual production uses vibration
Timeliness homogenizing residual stress provides experimental basis, improves the specific aim of oscillating aging；
(3) the invention provides Vibration Aging Process evidence the most direct to Influence of Fatigue Properties, for different metal material,
The production technology of multi-form structural member is formulated and is provided new approaches.
Accompanying drawing explanation
The FB(flow block) of Fig. 1 position present invention
Detailed description of the invention
Seeing Fig. 1, described in the invention a kind of position the method that oscillating aging controls timeliness part fatigue life, the method has
Body step is as follows:
Step one: according to material and the version of timeliness part, and according to residual stress test warp during production practices
Test and combine Finite Element Numerical Simulation, analyze the regularity of distribution of timeliness part residual stress, determine that timeliness part needs the region of timeliness；
Step 2: timeliness part is carried out model analysis, the preferably vibration shape, makes the timeliness region of timeliness part and tired region one
Cause；
Step 3: determine timeliness part installation form and excited frequency according to the vibration shape selected by step 2；
Step 4: foil gauge is attached to the timeliness region of timeliness part, according to step 3, is installed on vibration platen by timeliness part
On, fixing excited frequency, change exciting force size, utilize dynamic strain measuring instrument and data collecting system record dynamic strain number
According to, calculate dynamic stress (being not limited to this kind of dynamic stress rest method) according to dynamic strain data；
Step 5: a collection of timeliness part is grouped, and its packet situation is identified.Some are chosen from often group
Timeliness part is also numbered, and uses boring method, layer stripping, X-ray diffraction method, neutron diffraction method (to be not limited to this several remnants
Stress test method) timeliness part carried out residual stress test before oscillating aging；
Step 6: by corresponding with step 5 for the Packet State of timeliness part, according to the installation form identical with step 4, according to
The dynamic stress data that step 4 obtains, select different exciting forces that the timeliness part of difference group is carried out oscillating aging respectively, vibration
Time is certain；
Step 7: for quantitative assessment residual stress homo-effect, the timeliness part that step 5 is chosen from each group time
Effect region carries out residual stress test after oscillating aging；
Step 8: the timeliness part of different vibrational states is carried out fatigue experiment (draw-press, La-draw, reverse, the fatigue such as bending
Experiment), it is thus achieved that the fatigue life under fixing excited frequency, after different exciting force oscillating agings；
Wherein, " foil gauge is attached to the timeliness region of timeliness part, according to step 3, by timeliness part described in step 4
It is installed on vibration platen, fixing excited frequency, changes exciting force size, utilize dynamic strain measuring instrument and data collecting system
Record dynamic strain data, calculate dynamic stress according to dynamic strain data ", it is as follows that it implements process: will strain with 502 glue
Sheet is attached to the timeliness region of timeliness part, is connected by port wire corresponding with dynamic strain measuring instrument for foil gauge, and will dynamically
Strain testing instrument and data collecting system connect, and data collecting system is connected with computer, then fix excited frequency, change exciting
Power size, records dynamic strain data in vibration processes.Principal stress is calculated, by the 4th intensity finally according to mechanics of materials formula
Theoretical Calculation goes out equivalence dynamic stress；
Wherein, " a collection of timeliness part is grouped, and its packet situation is identified described in step 5.From often
Group chosen some timeliness parts and is numbered, using boring method, layer stripping, X-ray diffraction method, neutron diffraction method (not office
It is limited to this several residual stress test methods) timeliness part is carried out residual stress test before oscillating aging ", it implements process
As follows: a collection of timeliness part to be divided into some groups, and its vibrational state is identified, be divided into A, B, C ... wait group, then from
Each group is chosen several timeliness parts and by its numbered A-1, A-2, A-3 ..., use boring method, layer stripping, X-ray
Diffraction approach, neutron diffraction method (being not limited to this several residual stress test methods) are remaining before timeliness part carries out oscillating aging should
Power is tested, and before shaking, residual stress test can a testing time-effectiveness part surface residual stress, it is also possible to testing time-effectiveness part surface and
It is perpendicular to the residual stress in timeliness part case depth direction；
Wherein, described in step 8 " identified timeliness part is carried out fatigue experiment (draw-press, La-draw, reverse, curved
The fatigue experiments such as song), it is thus achieved that under fixing excited frequency, the fatigue life after different exciting force oscillating agings ", it implemented
Journey is as follows: the method utilizing lifting and lowering method to combine with method in groups, draws out the S-N curve of every kind of vibrational state.
Claims (1)
1. positioning the method that oscillating aging controls timeliness part fatigue life, the method specifically comprises the following steps that
Step one: according to material and the version of timeliness part, and according to residual stress test experience during production practices and
In conjunction with Finite Element Numerical Simulation, analyze the regularity of distribution of timeliness part residual stress, determine that timeliness part needs the region of timeliness；
Step 2: timeliness part is carried out model analysis, the preferably vibration shape, the timeliness region making timeliness part is consistent with tired region；
Step 3: determine timeliness part installation form and excited frequency according to the vibration shape selected by step 2；
Step 4: foil gauge is attached to the timeliness region of timeliness part, according to step 3, is installed on timeliness part on vibration platen,
Fixing excited frequency, changes exciting force size, utilizes dynamic strain measuring instrument and data collecting system record dynamic strain data, root
Dynamic stress (being not limited to this kind of dynamic stress rest method) is calculated according to dynamic strain data；
Step 5: a collection of timeliness part is grouped, and its packet situation is identified.Some timeliness are chosen from often group
Part is also numbered, and uses boring method, layer stripping, X-ray diffraction method, neutron diffraction method (to be not limited to this several residual stress
Method of testing) timeliness part carried out residual stress test before oscillating aging；
Step 6: by corresponding with step 5 for the Packet State of timeliness part, according to the installation form identical with step 4, according to step
The dynamic stress data that four obtain, select different exciting forces that the timeliness part of difference group is carried out oscillating aging, time of vibration respectively
Necessarily；
Step 7: for quantitative assessment residual stress homo-effect, the timeliness district of the timeliness part that step 5 is chosen from each group
Territory carries out residual stress test after oscillating aging；
Step 8: the timeliness part of different vibrational states is carried out fatigue experiment (draw-press, La-draw, reverse, bending etc. tired real
Test), it is thus achieved that the fatigue life under fixing excited frequency, after different exciting force oscillating agings；
Wherein, " foil gauge is attached to the timeliness region of timeliness part, according to step 3, timeliness part is installed described in step 4
On vibration platen, fixing excited frequency, change exciting force size, utilize dynamic strain measuring instrument and data collecting system record
Dynamic strain data, calculate dynamic stress according to dynamic strain data ", it is as follows that it implements process: is pasted by foil gauge with 502 glue
In the timeliness region of timeliness part, port wire corresponding with dynamic strain measuring instrument for foil gauge is connected, and by dynamic strain
Tester and data collecting system connect, and data collecting system is connected with computer, then fix excited frequency, change exciting force big
Little, vibration processes records dynamic strain data.Principal stress is calculated, by fourth strength theory finally according to mechanics of materials formula
Calculate equivalence dynamic stress；
Wherein, " a collection of timeliness part is grouped, and its packet situation is identified described in step 5.From often group
Choose some timeliness parts and numbered, using boring method, layer stripping, X-ray diffraction method, neutron diffraction method (to be not limited to
These several residual stress test methods) timeliness part carried out residual stress test before oscillating aging ", it implements process such as
Under: a collection of timeliness part is divided into some groups, and its vibrational state is identified, be divided into A, B, C ... wait group, then from often
One group is chosen several timeliness parts and by its numbered A-1, A-2, A-3 ..., use boring method, layer stripping, X-ray to spread out
Penetrate method, neutron diffraction method (being not limited to this several residual stress test methods) carries out residual stress before oscillating aging to timeliness part
Test, before shaking, residual stress test can a testing time-effectiveness part surface residual stress, it is also possible to testing time-effectiveness part surface and hanging down
Straight in the residual stress in timeliness part case depth direction；
Wherein, described in step 8 " identified timeliness part is carried out fatigue experiment (draw-press, La-draw, reverse, bending etc.
Fatigue experiment), it is thus achieved that under fixing excited frequency, the fatigue life after different exciting force oscillating agings ", it implements process such as
Under: the method utilizing lifting and lowering method to combine with method in groups, draw out the S-N curve of every kind of vibrational state.
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| CN106807614A (en) * | 2017-01-20 | 2017-06-09 | 广西大学 | A kind of torsional excitation device excited by electromagnetic actuators |
| CN108240896A (en) * | 2018-04-18 | 2018-07-03 | 西南交通大学 | Fatigue strength measuring method and device |
| CN108456772A (en) * | 2018-01-18 | 2018-08-28 | 上海海事大学 | A kind of method of determining ultrasonic vibration aging technique parameter |
| CN113832338A (en) * | 2021-11-05 | 2021-12-24 | 蓝家晟 | Steel construction pier residual stress relieving system based on big data |
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Application publication date: 20161207 |