CN118150380B - Device and method for dynamically measuring fretting fatigue friction coefficient - Google Patents
Device and method for dynamically measuring fretting fatigue friction coefficient Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 24
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- 238000010438 heat treatment Methods 0.000 claims description 28
- 238000005260 corrosion Methods 0.000 claims description 17
- 230000007797 corrosion Effects 0.000 claims description 16
- 150000003839 salts Chemical class 0.000 claims description 13
- 239000007921 spray Substances 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 239000012266 salt solution Substances 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 2
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 3
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000009661 fatigue test Methods 0.000 description 3
- 238000005299 abrasion Methods 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
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- 238000006056 electrooxidation reaction Methods 0.000 description 1
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- 239000000463 material Substances 0.000 description 1
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- 239000010959 steel Substances 0.000 description 1
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- 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
- G01N3/38—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by electromagnetic means
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- G01N3/00—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
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
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Abstract
The invention discloses a device and a method for dynamically measuring fretting fatigue friction coefficient, and relates to the technical field of precision testing. The device comprises: an axial force loading assembly; the normal loading assembly comprises two opposite linear driving motors, the output ends of the linear driving motors are connected with first loading rods, one ends of the first loading rods, which are far away from the linear driving motors, are provided with first force sensors, the first force sensors are hinged with second loading rods, one ends of the second loading rods, which are far away from the first force sensors, are provided with micro-motion pads through clamps in a detachable mode, the lower portions of the second loading rods are provided with mounting blocks, and second force sensors are arranged between the mounting blocks and the second loading rods. The device can quantitatively test the fatigue parameters and friction coefficients of the test piece in the test process, quantitatively measure the fretting fatigue performance and the service life of the test piece in the extreme environment, and has a wide application range.
Description
Technical Field
The invention relates to the technical field of precision test, in particular to a device and a method for dynamically measuring fretting fatigue friction coefficient.
Background
Aeroengines are a source of power for aircraft and are known as the "heart" of aircraft. The turbine blade is used as a core rotor component of an aeroengine, a blade disc and the blade are generally connected through a tenon-mortise structure, the blade rotates at a high speed to generate centrifugal force and axial aerodynamic force, micron-sized relative sliding can be generated between contact interfaces of the tenon and the mortise, and the turbine blade bears time-varying multiaxial stress, so that the turbine blade belongs to the typical micro-motion fatigue damage problem.
Current test devices for corrosion, wear or fatigue coupling include: patent number CN108931426A provides a fretting fatigue loading device and fretting fatigue test device, drives first loading pole rotation through first loading piece, and the other end of first loading pole supports the slide and realizes normal force invariable loading. Only the fretting fatigue performance of the dog bone sample in different temperature environments can be evaluated, and the friction force measurement can not be realized at the same time. The patent number CN 112504819B provides a steel wire corrosion and abrasion coupling fatigue test device, and the synchronous action of electrochemical corrosion, fatigue and abrasion is realized through the coupling of a fatigue test machine, a lateral force loading module and an electrolytic acceleration module, but the friction force measurement cannot be realized in the patent.
Disclosure of Invention
In order to solve at least one of the above problems, the present invention provides a device and a method for dynamically measuring fretting fatigue friction coefficient.
The technical scheme of the invention is as follows: a device for dynamically measuring fretting fatigue friction coefficient comprises,
The axial force loading assembly is used for providing axial force and comprises two stress loading motors which are oppositely arranged, and the output end of each stress loading motor is connected with a clamping part;
The normal loading assembly for providing normal force comprises two opposite linear driving motors, wherein the output ends of the linear driving motors are connected with first loading rods, one ends of the first loading rods, which are far away from the linear driving motors, are provided with first force sensors, the first force sensors are hinged with second loading rods, one ends of the second loading rods, which are far away from the first force sensors, are detachably provided with micro-motion pads through clamps, the lower parts of the second loading rods are provided with mounting blocks, second force sensors are arranged between the mounting blocks and the second loading rods, and the second force sensors are used for detecting the force applied by the second loading rods to the mounting blocks;
A test piece is arranged between the two clamping parts and the two micro-motion pads.
The invention further provides a support assembly, which comprises a bottom plate, wherein a plurality of upright posts are arranged on the bottom plate, a top plate is arranged at one end, far away from the bottom plate, of each upright post, and two stress loading motors are respectively arranged on the bottom plate and the top plate.
The first loading rod penetrates through the limiting hole and is limited by the limiting hole.
One embodiment of the invention is that the output end of the stress loading motor is provided with a third loading rod, and one end of the third loading rod, which is far away from the stress loading motor, is provided with a clamping part.
The test piece is arranged in the heating furnace, through holes for the clamping parts to pass through are formed in the top and the bottom of the heating furnace, and through holes for the second loading rods to pass through are formed in the left side and the right side of the heating furnace.
Further, still be equipped with salt fog and corrode loading subassembly, salt fog corrodes loading subassembly including locating atomizer in the heating furnace, atomizer parallel connection has atomizer and air supply, the atomizer is kept away from atomizer's one end has connected gradually water pump and salt solution bin.
Further, the heating furnace is detachably arranged.
Another object of the present invention is to propose a method for dynamically measuring fretting fatigue friction coefficient, comprising the steps of:
S1, clamping and fixing a test piece through two clamping parts, enabling two micro-motion pads to be clung to the side wall of the test piece through a linear driving motor, and assembling equipment;
s2, applying normal force to the test piece through two linear driving motors until reaching a preset value;
s3, applying target alternating stress to the test piece through two stress loading motors until the test piece is subjected to fatigue fracture, acquiring micro fatigue performance and service life of the test piece under target conditions, and recording the numerical values of the first force sensor and the second force sensor in the process;
In the test process, the friction coefficient of the target test piece and the micro-motion pad is calculated by the following formula: u=f f/ FN1,Ff= (FN2 ×l1)/(l1+l2+l3+l4), where u is the coefficient of friction; f N1 is the value of the first force sensor; f N2 is the value of the second force sensor; l1 represents the distance between the hinge point and the second force sensor, wherein the hinge point is the hinge point of the first force sensor and the second loading rod; l2 represents the distance of the second force sensor from the clamp; l3 represents the thickness of the jig; l4 represents the thickness of the micro-pad.
One embodiment of the present invention is that before applying the target alternating stress to the test piece, the method further comprises the steps of: and regulating the temperature to a target temperature through a heating furnace, and setting a salt spray corrosion environment in the heating furnace through a salt spray corrosion loading assembly.
The beneficial effects are that: the device can quantitatively test fatigue parameters and friction coefficients in the test process, quantitatively measure fretting fatigue performance and service life of the sample in an extreme environment, and has a wide application range.
Drawings
FIG. 1 is a schematic view showing the overall structure of the apparatus of example 1;
FIG. 2 is an enlarged schematic view of the portion A of FIG. 1;
FIG. 3 is a schematic diagram of the parameters needed to calculate the coefficient of friction;
In the figure, 1 is a bottom plate, 2 is a top plate, 3 is a stress loading motor, 4 is a clamping part, 5 is a linear driving motor, 6 is a first loading rod, 7 is a second loading rod, 8 is a first force sensor, 9 is an air source, 10 is an atomizer, 11 is a water pump, 12 is a saline solution storage box, 13 is a stand column, 14 is a fastening bolt, 15 is a second force sensor, 16 is a protection pad, 17 is a mounting block, 18 is a hinge point, 19 is a clamp, 20 is a micro-motion pad, 21 is a collecting tank, 22 is an atomizing nozzle, 23 is a limit plate, 24 is a third loading rod, 25 is a test piece, and 26 is a heating furnace.
Detailed Description
The following detailed description of the invention will be clearly and fully described in connection with the examples and the accompanying drawings, in which it is evident that the examples described are only some, but not all embodiments of the invention.
Example 1
As shown in fig. 1, an apparatus for dynamically measuring fretting fatigue friction coefficient, comprising,
The axial force loading assembly is used for providing axial force and comprises two oppositely arranged stress loading motors 3, and the output ends of the stress loading motors 3 are connected with clamping parts 4;
The normal loading assembly for providing normal force comprises two opposite linear driving motors 5, wherein the output ends of the linear driving motors 5 are connected with first loading rods 6, one ends of the first loading rods 6 far away from the linear driving motors 5 are provided with first force sensors 8, the first force sensors 8 are hinged with second loading rods 7, one ends of the second loading rods 7 far away from the first force sensors 8 are detachably provided with micro-motion pads 20 through clamps 19, the lower parts of the second loading rods 7 are provided with mounting blocks 17, second force sensors 15 are arranged between the mounting blocks 17 and the second loading rods 7, and the second force sensors 15 are used for detecting the force exerted by the second loading rods 7 on the mounting blocks 17;
A test piece 25 is arranged between the two clamping parts 4 and the two micro-motion pads 20.
Specifically, for the aircraft turbine blade, because the blade is of a mortise structure and is not completely fixed, in the actual operation process, when the turbine blade rotates at a high speed, the blade is subjected to corresponding centrifugal force, micrometer-level relative sliding can be generated between the tenon and the mortise of the turbine blade under the action of the centrifugal force, and micro-friction can be generated between the tenon and the mortise in the sliding process; at the same time, during rotation of the turbine blade, it is also subjected to time-varying stresses, which lead to a relatively complex fretting fatigue of the turbine blade of the aircraft.
For this purpose, in the present embodiment, an axial force loading assembly is provided for applying an alternating force in the vertical direction to the test piece 25; the normal loading assembly is provided for applying a transverse normal force to the test piece 25.
For the axial force loading assembly, because the function of the axial force loading assembly is relatively simple, the axial force loading assembly generally comprises two oppositely arranged stress loading motors 3, and the output shafts of the two stress loading motors 3 are arranged on the same vertical line, so that a test piece can be vertically arranged, and the normal force can be conveniently loaded. In order to facilitate the fixing of the test piece 25 between the two stress loading motors 3, the output end of the stress loading motor 3 is connected with a corresponding clamping part 4, and the clamping part 4 can fix and clamp the test piece 25; the clamping portion 4 may be set according to the actual situation, after the test piece 25 is clamped, the stress loading motor 3 is required to apply a compressive force or a tensile force to the test piece 25, and more clamping portions 4 meeting the condition can be applied to the present invention, for example, a clamping hole is provided on the test piece 25, a clamping rod with a size matching the clamping hole is provided on the clamping portion 4, and then the clamping rod is fixed by a bolt. In this embodiment, a corresponding third loading rod 24 is disposed at the output end of the stress loading motor 3, and a clamping portion 4 is connected to one end of the third loading rod 24 away from the stress loading motor 3.
At the same time, it is necessary for the loading of the axial force to be able to generate alternating stresses so that fretting friction is generated between the test piece 25 and the fretting mat 20. Therefore, in this embodiment, the stress loading motor 3 is used as a source of generating the axial force, the stress loading motor 3 is usually a linear motor, and an encoder is provided at the same time, and during the use, the maximum loading stress value (stress amplitude) and the alternating type (sinusoidal alternating and sawtooth alternating) can be input, and the loading type of these alternating stresses is realized through programming, which belongs to the conventional means in the art, and therefore will not be repeated.
For the normal loading assembly, in this embodiment, it is not only necessary to load the test piece 25 with a fixed normal force, but also the ability to test the coefficient of friction of the test piece 25 with the micro-pad 20 during loading.
For a normally loaded assembly, the assembly for applying a normal force comprises two oppositely arranged linear drive motors 5, which linear drive motors 5 power the application of the normal force. In order to apply normal force to a test piece conveniently, a first loading rod 6 is arranged at the output end of the linear driving motor 5, a first force sensor 8 is arranged at one end, far away from the linear driving motor, of the first loading rod 6, a second loading rod 7 is hinged to one end of the first force sensor 8, one end of the second loading rod 7 is connected with a clamp 19, and a micro-motion pad 20 is detachably arranged on the clamp 19. A mounting block 17 is arranged at the lower part of the second loading rod 7, and a second force sensor 15 is arranged between the mounting block 17 and the second loading rod 7. The second force sensor 15 is used to detect the force applied by the second loading rod 7 to the mounting block 17.
For the micro-motion pad 20, it is mainly to simulate micro-motion friction and micro-motion fatigue of the tenon-mortise of the turbine blade, and therefore, the material of the micro-motion pad is required to be the same as that of the tenon-mortise. Meanwhile, the micro-motion pad 20 is a consumable, and each time the micro-motion pad 20 needs to be replaced after one test, the micro-motion pad 20 and the clamp 19 are detachably connected.
The normal force applied to the test piece 25 by the linear drive motor 5 can be measured by the first force sensor 8, and the torque generated when the micro pad 20 receives micro motion can be measured by the second force sensor 15. The friction coefficient of the test piece 25 in the test process can be calculated and obtained by combining the fixed parameters of the parts such as the second loading rod 7 and the like through the values measured by the first force sensor 8 and the second force sensor 15.
In this embodiment, the second loading rod 7 is in an articulated state, because during the test, the test piece 25 is subjected to the alternating stress of the axial force loading assembly, and a certain pressure exists between the micro-motion pad 20 and the test piece 25, so that the second loading rod 7 continuously has upward or downward movement trends, and if not in an articulated state, the movement trends are transmitted to the first loading rod 6 and the linear driving motor 5, so that the linear driving motor 5 is damaged; the hinge of the present embodiment means that the second loading lever 7 can be rotated up and down around the hinge point 18, and may be provided as a common hinge member such as a hinge.
Since the first force sensor 8 and the second force sensor 15 need to detect the force, and the corresponding hinge component is arranged between the first loading rod 6 and the second loading rod 7, in order to make the results of the first force sensor 8 and the second force sensor 15 more accurate, a limiting plate 23 is further arranged between the first force sensor 8 and the linear driving motor 5, and a limiting hole is arranged on the limiting plate 23, and the first loading rod 6 passes through the limiting hole and is limited by the limiting hole, so that the first loading rod 6 can only move in one-dimensional direction. Of course, in theory, even if the limiting plate 23 is not provided, the first loading rod 6 is normally moved in one-dimensional direction, but when the first loading rod 6 is subjected to an external force, the movement direction thereof may be deviated, so that the limiting plate 23 of the present embodiment is mainly used to avoid such deviation.
In order to facilitate the setting and detection of the second force sensor 15, a fixing device is also provided; the fixing device includes: the second loading rod 7 is provided with a through hole, a fastening bolt 14 passing through the through hole is arranged at the same time, the lower part of the through hole of the second loading rod 7 is sequentially provided with a corresponding protection pad 16, a second force sensor 15 and a mounting block 17, and the fastening bolt 14 is arranged on the mounting block 17. When the second loading rod 7 needs to be fixed, the fastening bolt 14 passes through the protection pad 16 and the through hole, and the outside is fixed by the nut.
Meanwhile, for the stress loading motor 3 arranged at the upper part in the axial force loading assembly, a mounting plate is usually required to be arranged; for the further stress-loading motor 3 and the linear drive motor 5, it is likewise necessary to provide corresponding mounting plates. Thus, in the present embodiment, a corresponding support assembly is provided. The support assembly comprises a bottom plate 1 and a top plate 2, two stress loading motors 3 are respectively arranged on the bottom plate 1 and the top plate 2, a plurality of stand columns 13 are arranged between the bottom plate 1 and the top plate 2, and the top plate 2 and the bottom plate 1 are fixed through the stand columns 13 in order to enable the positions of the top plate 2 and the bottom plate 1 to be relatively fixed. Although in theory the linear drive motor 5 could still be arranged on the base plate 1, in practice we find that the height of the different test pieces 25 differs considerably, for the stress drive motor 3 it is possible to adapt to test pieces 25 of different heights by adjusting the length of the third loading bar 24. However, for the linear driving motor 5, since normal force needs to be applied to the middle part of the test piece 25, if the linear driving motor 5 is directly arranged on the bottom plate 1, the device is difficult to detect the test pieces 25 with different heights; therefore, in the present embodiment, the linear driving motor 5 is disposed on one mounting portion, and the micro-pad 20 connected to the linear driving motor 5 can be attached to the middle portion of the test piece 25, so as to facilitate the experiment.
For the turbine blade of the aero-engine, the temperature of the working environment is higher, for this reason, in this embodiment, a heating furnace 26 is further provided, and the test piece 25 is heated by the heating furnace 26, so that the test piece 25 is maintained under the working temperature condition, and the test result is more accurate. Of course, since it is necessary to load the test piece 25 with a corresponding stress, in the present embodiment, the top and bottom of the heating furnace 26 are provided with through holes allowing the third loading rod 24 and the clamping portion 4 to pass through, and two opposite sides are provided with through holes allowing the second loading rod 7 to pass through. Meanwhile, in order to ensure that the heat in the heating furnace 26 is not excessively dissipated, a corresponding high-temperature gasket is further disposed at the through hole, which is a conventional arrangement in the art, and therefore will not be described herein. In order to facilitate the disassembly and assembly, in the present embodiment, the heating furnace 26 is provided in left and right parts so that the test piece 25 and the micro-pad 20 required for the experiment can be assembled and disassembled.
In some cases, in marine environments, turbine blades are not only subjected to high temperatures, but also to corrosive environments such as high salt, high humidity, etc., where the life of the turbine blades is greatly reduced. To simulate this process, in this embodiment, a salt spray corrosion loading assembly is also provided.
The salt spray corrosion loading assembly comprises an atomizing nozzle 22 arranged in the heating furnace, wherein the atomizing nozzle 22 is connected with an atomizer 10 and an air source 9 in parallel, and one end, away from the atomizing nozzle 22, of the atomizer 10 is sequentially connected with a water pump 11 and a salt solution storage box 12. The saline solution can be atomized by the water pump 11, the saline solution storage tank 12, and the atomizer 10; the atomized salt solution is brought into the interior of the heating furnace 26 at a certain speed by the air source 9. Of course, in order to simulate the persistence of the high-salt environment, an atomized liquid outlet and a collecting tank 21 are further arranged at the bottom of the heating furnace, so that new corrosion sources can continuously appear in the heating furnace, and the heating furnace is closer to the actual situation.
In summary, the device of the embodiment can simulate and detect the corrosion parameter, the fatigue fracture parameter and the friction parameter of the test piece in the high-temperature and high-corrosion environment.
Example 2
A method for dynamically measuring fretting fatigue friction coefficient using the apparatus set forth in example 1, the method comprising the steps of:
S1, clamping and fixing a test piece through two clamping parts, enabling two micro-motion pads to be clung to the side wall of the test piece through a linear driving motor, and assembling equipment;
The test piece in this embodiment is typically a dog bone test piece, and when the test piece is fixed by the clamping portion, the test piece can bear tensile force and compressive force. For the micro-pad, a new micro-pad needs to be replaced during each test.
S2, applying normal force to the test piece through two linear driving motors until reaching a preset value;
s3, applying target alternating stress to the test piece through two stress loading motors until the test piece is subjected to fatigue fracture, acquiring micro fatigue performance and service life of the test piece under target conditions, and recording the numerical values of the first force sensor and the second force sensor in the process;
In the test process, the friction coefficient of the target test piece and the micro-motion pad is calculated by the following formula: u=f f/ FN1,Ff= (FN2 ×l1)/(l1+l2+l3+l4), where u is the coefficient of friction; f N1 is the value of the first force sensor; f N2 is the value of the second force sensor; l1 represents the distance between the hinge point and the second force sensor, wherein the hinge point is the hinge point of the first force sensor and the second loading rod; l2 represents the distance of the second force sensor from the clamp; l3 represents the thickness of the jig; l4 represents the thickness of the micro-pad.
Also, since the apparatus of example 1 is provided with a heating furnace and a salt spray corrosion assembly, when testing the fretting fatigue performance of a test piece under a high temperature and high corrosion environment, the apparatus further comprises the steps of: before alternating stress is applied to a test piece, the temperature is adjusted to a target temperature through a heating furnace, and a salt spray corrosion environment is arranged in the heating furnace through a salt spray corrosion loading assembly so as to analyze fretting fatigue of the test piece under the conditions of high temperature and high corrosion.
The present invention is not limited to the above-mentioned embodiments, but is intended to be limited to the following embodiments, and any modifications, equivalents and modifications can be made to the above-mentioned embodiments without departing from the scope of the invention.
Claims (8)
1. A device for dynamically measuring fretting fatigue friction coefficient is characterized by comprising,
The axial force loading assembly is used for providing axial force and comprises two stress loading motors which are oppositely arranged, and the output end of each stress loading motor is connected with a clamping part;
The normal loading assembly for providing normal force comprises two opposite linear driving motors, wherein the output ends of the linear driving motors are connected with first loading rods, one ends of the first loading rods, which are far away from the linear driving motors, are provided with first force sensors, the first force sensors are hinged with second loading rods, one ends of the second loading rods, which are far away from the first force sensors, are detachably provided with micro-motion pads through clamps, the lower parts of the second loading rods are provided with mounting blocks, second force sensors are arranged between the mounting blocks and the second loading rods, and the second force sensors are used for detecting the force applied by the second loading rods to the mounting blocks;
a test piece is arranged between the two clamping parts and the two micro-motion pads;
the test piece is arranged in the heating furnace, through holes for the clamping parts to pass through are formed in the top and the bottom of the heating furnace, and through holes for the second loading rods to pass through are formed in the left side and the right side of the heating furnace;
The salt spray corrosion loading assembly comprises an atomizing nozzle arranged in the heating furnace, wherein the atomizing nozzle is connected with an atomizer and an air source in parallel, and one end, far away from the atomizing nozzle, of the atomizer is sequentially connected with a water pump and a salt solution storage tank.
2. The device of claim 1, further comprising a support assembly, wherein the support assembly comprises a base plate, a plurality of upright posts are arranged on the base plate, a top plate is arranged at one end of each upright post far away from the base plate, and the two stress loading motors are respectively arranged on the base plate and the top plate.
3. The device of claim 1, wherein a limiting plate is further arranged between the first force sensor and the linear driving motor, a limiting hole is formed in the limiting plate, and the first loading rod penetrates through the limiting hole and is limited by the limiting hole.
4. The device of claim 1, wherein the output end of the stress loading motor is provided with a third loading rod, and one end of the third loading rod, which is far away from the stress loading motor, is provided with a clamping part.
5. The apparatus of claim 1, wherein the heating furnace is removably disposed.
6. The device according to claim 1, wherein the mounting block is further provided with a fixing device for fixing the second loading rod, and the fixing device is detachable.
7. A method for dynamically measuring fretting fatigue friction coefficient, which is characterized in that the method is based on the device for dynamically measuring fretting fatigue friction coefficient according to any one of claims 1-6, and comprises the following steps:
S1, clamping and fixing a test piece through two clamping parts, enabling two micro-motion pads to be clung to the side wall of the test piece through a linear driving motor, and assembling equipment;
s2, applying normal force to the test piece through two linear driving motors until reaching a preset value;
s3, applying target alternating stress to the test piece through two stress loading motors until the test piece is subjected to fatigue fracture, acquiring micro fatigue performance and service life of the test piece under target conditions, and recording the numerical values of the first force sensor and the second force sensor in the process;
In the test process, the friction coefficient of the target test piece and the micro-motion pad is calculated by the following formula: u=f f/ FN1,Ff = (FN2 ×l1)/(l1+l2+l3+l4), where u is the coefficient of friction; f N1 is the value of the first force sensor; f N2 is the value of the second force sensor; l1 represents the distance between the hinge point and the second force sensor, wherein the hinge point is the hinge point of the first force sensor and the second loading rod; l2 represents the distance of the second force sensor from the clamp; l3 represents the thickness of the jig; l4 represents the thickness of the micro-pad.
8. The method of claim 7, further comprising the step of, prior to applying the target alternating stress to the test piece: and regulating the temperature to a target temperature through a heating furnace, and setting a salt spray corrosion environment in the heating furnace through a salt spray corrosion loading assembly.
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| CN202410585176.1A CN118150380B (en) | 2024-05-13 | 2024-05-13 | Device and method for dynamically measuring fretting fatigue friction coefficient |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105486586A (en) * | 2016-01-19 | 2016-04-13 | 山东科技大学 | Surrounding rock deformation and pressure simulation test system and method |
| CN106769079A (en) * | 2016-11-29 | 2017-05-31 | 上海机动车检测认证技术研究中心有限公司 | Fatigue test Multifunctional environment device |
| CN108844893A (en) * | 2018-09-10 | 2018-11-20 | 武汉轻工大学 | A kind of dynamic friction coefficient measurement method |
| CN110907298A (en) * | 2019-11-20 | 2020-03-24 | 北京建筑大学 | Biaxial loading fretting fatigue test system and method |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100387966C (en) * | 2005-04-22 | 2008-05-14 | 中国矿业大学 | Wear test method of twisting jiggle of generating micro iamplitude of vibration, and testing machine |
| CN201689023U (en) * | 2010-01-19 | 2010-12-29 | 西南交通大学 | Small-displacement reciprocated rolling friction-wear test device |
| CN104155102A (en) * | 2014-07-15 | 2014-11-19 | 重庆大学 | Transmission and friction experiment table for multifunctional mechanical part |
| CN104406873B (en) * | 2014-11-19 | 2017-07-28 | 中国科学院深圳先进技术研究院 | Shaft element coating friction wear testing machine |
| CN105699214B (en) * | 2016-01-14 | 2018-11-13 | 西南交通大学 | A kind of reverse micro move fatigue rig and test method |
| CN206020193U (en) * | 2016-08-11 | 2017-03-15 | 绍兴文理学院 | A kind of disconnected strength test assay device of shear of rock for meeting different size specification |
| CN206208644U (en) * | 2016-11-30 | 2017-05-31 | 岭东核电有限公司 | Constant normal force loading device in fretting fatigue testing |
| CN109100219B (en) * | 2018-05-31 | 2021-04-27 | 西北工业大学 | Fretting fatigue test device and method |
| CN212932209U (en) * | 2020-07-20 | 2021-04-09 | 禹城市必拓有机硅有限公司 | Organic silicon material tensile test device |
| CN117233014A (en) * | 2022-06-06 | 2023-12-15 | 杭州沪宁电梯部件股份有限公司 | Friction and wear testing device |
| CN115078069A (en) * | 2022-06-15 | 2022-09-20 | 北京理工大学 | Line contact friction wear testing machine with calibration function |
| CN116793813A (en) * | 2023-06-16 | 2023-09-22 | 华东理工大学 | Convenient loading device for fretting fatigue test |
| CN116678819A (en) * | 2023-06-30 | 2023-09-01 | 洛阳理工学院 | Road surface friction coefficient measuring device and scanning type measuring method |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105486586A (en) * | 2016-01-19 | 2016-04-13 | 山东科技大学 | Surrounding rock deformation and pressure simulation test system and method |
| CN106769079A (en) * | 2016-11-29 | 2017-05-31 | 上海机动车检测认证技术研究中心有限公司 | Fatigue test Multifunctional environment device |
| CN108844893A (en) * | 2018-09-10 | 2018-11-20 | 武汉轻工大学 | A kind of dynamic friction coefficient measurement method |
| CN110907298A (en) * | 2019-11-20 | 2020-03-24 | 北京建筑大学 | Biaxial loading fretting fatigue test system and method |
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