CN111650063A - Normal load loading device based on single-shaft fatigue testing machine - Google Patents
Normal load loading device based on single-shaft fatigue testing machine Download PDFInfo
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- 238000009661 fatigue test Methods 0.000 title claims abstract description 45
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- 238000013461 design Methods 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 7
- 230000008859 change Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
- G01N3/34—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces generated by mechanical means, e.g. hammer blows
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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
- G01N3/02—Details
- G01N3/04—Chucks
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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
- G01N3/02—Details
- G01N3/06—Special adaptations of indicating or recording means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0075—Strain-stress relations or elastic constants
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0252—Monoaxial, i.e. the forces being applied along a single axis of the specimen
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/04—Chucks, fixtures, jaws, holders or anvils
- G01N2203/0423—Chucks, fixtures, jaws, holders or anvils using screws
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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Abstract
The invention relates to a normal load loading device based on a single-shaft fatigue testing machine, which is characterized in that: the device comprises a normal load loading unit and a normal fixing unit, wherein the normal load loading unit comprises a test piece, a micro-motion gasket clamping slide block, a first cover plate, a second cover plate, a workbench, a force measuring sensor and a normal load adjusting bolt; the normal direction fixing unit comprises a first partition plate, a second partition plate, a fixing screw rod, a limiting nut, a fixing nut, a locknut, a first normal direction fixing piece and a second normal direction fixing piece. The device has scientific and reasonable structural design, simple and ingenious structure, balanced load loading and fixed loading load, can be well suitable for actual complex conditions, and ensures the test precision; and the test piece is loaded in balance, so that the accuracy of the test result is ensured.
Description
Technical Field
The invention belongs to the field of material performance testing, relates to a loading device of a single-shaft fatigue testing machine, and particularly relates to a normal load loading device based on the single-shaft fatigue testing machine.
Background
Fretting fatigue refers to a phenomenon that a part of a surface slides relatively with other contact surfaces with small amplitude under the action of cyclic load, so that the fatigue strength of the part is reduced or the part is broken early, and the fretting is slight and unpredictable and eliminated, can happen on most mechanical structures such as screw connection, key connection and some interference fit pieces, and can accelerate parts and reduce the service life due to fretting fatigue in the fields of mechanical engineering, aerospace, biomedical treatment and the like. Therefore, the research on the aspects of estimating the fatigue life of the material and detecting the fatigue strength of the material has important significance. And when the fretting fatigue test is carried out, the fretting pad compresses the test piece along the normal direction. In the fretting fatigue test process, the test piece bears an axial force (fatigue load), and the fretting pads on two sides are pressed on the surface of the fretting test piece under the action of a normal force. Due to the effect of fatigue load, micron-scale relative sliding can occur between the test piece and the micro-pad, a micro-motion phenomenon is generated, and finally micro-motion fatigue failure occurs in the contact area of the test piece and the micro-pad, so that how to realize the reliability and the practicability of normal load and simulating a real use scene plays a crucial role in research on micro-motion fatigue.
Through the search of the published patent documents, the following similar published patent documents are found:
1. CN204988981U discloses a simple manual fretting fatigue loading device, which forms a stable integral frame through a baffle and a support column, wherein the outer side wall of the lower part of the baffle is provided with a first connecting rod support lug, and a push rod mounting hole, a long lever support lug and a pawl support lug are sequentially arranged above the first connecting rod support lug along the vertical direction; the long lever is approximately L-shaped, a weight is hung at the end of the long arm, the end of the short arm is hinged with the connecting rod group, the turning point is hinged with the long lever supporting lug, a ratchet wheel is arranged outside the turning point, and the ratchet wheel is matched with the stopping pawl; the connecting rod group is hinged with the push rods, one end of the inner side of each push rod is provided with a force sensor, the other end of each force sensor is connected with the micro-motion pad, and a sample is arranged between the two push rods. The invention has simple operation and can manually regulate and control the gravity of the weight so as to realize the control of the loading force.
2. CN105043976A discloses a friction coefficient measurement subassembly among test device of fretting vice friction coefficient among dynamic measurement fretting fatigue in-process realizes the fretting operating mode and dynamic measurement fretting fatigue in-process test piece the fretting section and the fretting pad cooperate the friction coefficient between the fretting vice that forms, and application of horizontal direction load is realized to normal force loading subassembly, and the fixed subassembly of upper end realizes that test piece and anchor clamps are specific fixed. The horizontal loading of the fretting fatigue test is realized by adopting a hydraulic system, the loading system adopts a closed force system frame structure, and a piston rod of a hydraulic cylinder pushes a fretting pad clamping slide block to move in a slide groove of a clamp body. The friction coefficient measuring component is fixed on the upper end fixing component through a pin, in the vertical direction, the friction coefficient measuring component is only subjected to friction force generated between the test piece and the micromotion pad due to the micromotion effect except for self gravity and the gravity of the hydraulic cylinder, and the friction coefficient of the micromotion pair in the micromotion fatigue test process can be dynamically monitored after the friction coefficient measuring component is calibrated by pasting a strain gauge on the working section of the clamp body.
3. CN110132739A discloses a fretting fatigue test normal load loading device and method. The loading device consists of two parts: a fixed portion and a load-carrying portion. The method specifically comprises the following steps: the clamp comprises a micro-motion pad, a first clamping plate, a second clamping plate, a force measuring sensor, a load adjusting screw, a locknut, a limiting screw rod, a positioning nut, a limiting nut, a bushing, a fixing plate, a fixing bolt, an inner side fixing block and an outer side fixing block. The invention realizes the micro-motion fatigue test on a common fatigue testing machine.
The normal force loading device that present cooperation unipolar fatigue testing machine carried out fine motion fatigue test has utilizes hydraulic means to realize, does so not only to make whole device structure complicated, can increase experimental apparatus's weight moreover, causes certain influence to the precision of unipolar fatigue testing machine originally, makes use cost increase moreover to some extent. Meanwhile, the control of the normal load acting force by using a hydraulic device is not accurate enough.
The conventional loading device for realizing the normal force still utilizes a single power source, so that the normal load borne by the test piece is unbalanced, additional factors except the experiment are generated, the experiment result is influenced, and the experiment conclusion is not accurate enough. The normal load loading device used at present can not well control loads on two sides to be consistent, and the loads are fixed, so that the complex conditions in actual use can not be well simulated, and the precision of an experimental result is influenced to a certain extent.
Disclosure of Invention
The invention aims to provide a normal load loading device based on a single-shaft fatigue testing machine, aiming at overcoming the defects and shortcomings of the prior art, and solving the problems that the normal loading device in the prior art is heavy, high in cost, incapable of accurately controlling the load size and the like.
The technical problem to be solved by the invention is realized by the following technical scheme:
the utility model provides a normal load loading device based on unipolar fatigue testing machine which characterized in that: the device comprises a normal load loading unit and a normal fixing unit, wherein the normal load loading unit comprises a test piece, a micro-motion gasket clamping slide block, a first cover plate, a second cover plate, a workbench, a force measuring sensor and a normal load adjusting bolt; the normal fixing unit comprises a first partition plate, a second partition plate, a fixing screw, a limiting nut, a fixing nut, a locknut, a first normal fixing piece and a second normal fixing piece;
the micro-motion gasket is placed at the vacant position of the first cover plate and covers the micro-motion gasket clamping slide block, a gasket clamp is fixedly combined through an inner hexagon bolt, the gasket clamp is symmetrically installed in through grooves on the left side and the right side of the workbench, the force measuring sensors are symmetrically installed and placed in the through grooves, the inner sides of the force measuring sensors are in contact with the gasket clamp, and the second cover plate is fixed on the upper surface of the workbench through the inner hexagon bolt; the test piece penetrates through the through hole of the workbench from top to bottom, the lower end of the test piece is fixedly connected with the bottom fixing piece at the bottom end of the workbench, and the upper end of the test piece is connected with the single-shaft fatigue testing machine through the through hole arranged on the test piece;
the first partition plate is fixed at a step of the workbench through a limiting nut, the normal load adjusting bolt passes through a threaded hole in the center of the first partition plate to be in contact with the force measuring sensor, through holes are formed in four corners of the first partition plate and the second partition plate, fixing screws can pass through the through holes, the first normal fixing piece and the second normal fixing piece are connected through bolts and fixed with stand columns on two sides of the single-axis fatigue testing machine, and the first normal fixing piece is connected with the second partition plate through the screws and clamped with the second partition plate through the fixing nut and the anti-loosening nut; the second partition plate is fixed on the fixing screw rod through a limiting nut.
And the micro gasket is clamped and arranged on the first cover plate and can be replaced.
And a second strain gauge is adhered to the axial surface of the test piece.
Moreover, first strain gauges are symmetrically attached to the left and right sides of the hanging part at the lower end of the workbench.
Moreover, the front end face and the rear end face of the workbench are provided with observation holes.
And a threaded hole is formed in the step part connected to the bottom end of the workbench, a threaded hole is also formed in the position corresponding to the first partition plate, and the workbench and the first partition plate are fixed through bolts penetrating through the threaded holes.
The invention has the advantages and beneficial effects that:
1. the normal load loading device based on the single-shaft fatigue testing machine, disclosed by the invention, applies a larger normal load to the test piece by adopting the bolt, is simple in structure and convenient to operate, can be fixed on the single-shaft fatigue testing machine, and is strong in practicability.
2. According to the normal load loading device based on the single-shaft fatigue testing machine, the micro-motion gasket is clamped and arranged on the first cover plate and can be replaced, and different micro-motion pair forms are realized by replacing the micro-motion gaskets made of different materials.
3. According to the normal load loading device based on the single-shaft fatigue testing machine, the force transducer is arranged in the through groove of the workbench, so that the change condition of the normal load can be monitored in real time and regulated, the stability of the normal load is ensured, and the actual load condition is simulated.
4. According to the normal load loading device based on the single-shaft fatigue testing machine, the second strain gauge is adhered to the axial surface of the test piece, so that the axial force applied to the workpiece can be monitored in real time, whether the change of the axial load meets the expectation or not is detected, fine adjustment is carried out according to deviation, the integral use efficiency of the device is improved, and the experimental result is more comprehensive and accurate.
5. According to the normal load loading device based on the single-shaft fatigue testing machine, the first strain gauges are symmetrically attached to the left and right sides of the suspension part at the lower end of the workbench, and the friction coefficient of a test piece can be measured.
6. According to the normal load loading device based on the single-shaft fatigue testing machine, the front end face and the rear end face of the workbench are provided with the observation holes, so that the fracture condition of the surface of the workpiece in the fatigue test can be observed.
7. According to the normal load loading device based on the single-shaft fatigue testing machine, the lower end face of the working step ladder is provided with the working step ladder threaded hole and is connected with the first partition plate through the bolt, so that the axial installation stability of the workbench is guaranteed.
8. The device has scientific and reasonable structural design, simple and ingenious structure, balanced load loading and fixed loading load, can be well suitable for actual complex conditions, and ensures the test precision; and the test piece is loaded in balance, so that the accuracy of the test result is ensured.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the micro spacer clamping slide of the present invention;
FIG. 3 is a schematic view of the construction of a micro-spacer of the present invention;
FIG. 4 is a schematic structural view of a second cover plate according to the present invention;
FIG. 5 is a schematic view of the construction of the shim holder of the present invention;
FIG. 6 is a schematic view of the load cell of the present invention;
FIG. 7 is an isometric and top-bottom isometric view of the inventive table.
Description of the reference numerals
1-test piece, 2-micro-motion gasket, 3-micro-motion gasket clamping slide block, 4-first cover plate, 5-second cover plate, 6-workbench, 7-force transducer, 8-normal load adjusting bolt, 9-first clapboard, 10-second clapboard, 11-fixing screw, 12-limiting nut, 13-fixing nut, 14-locknut, 15-first normal fixing piece, 16-second normal fixing piece, 17-bottom fixing piece, 18-gasket clamp, 19-observation hole, 20-first strain gauge, 21-second strain gauge and 22-working step threaded hole.
Detailed Description
The present invention is further illustrated by the following specific examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
The utility model provides a normal load loading device based on unipolar fatigue testing machine which characterized in that: the device comprises a normal load loading unit and a normal fixing unit, wherein the normal load loading unit comprises a test piece 1, a micro-motion gasket 2, a micro-motion gasket clamping slide block 3, a first cover plate 4, a second cover plate 5, a workbench 6, a force measuring sensor 7 and a normal load adjusting bolt 8; the normal direction fixing unit comprises a first clapboard 9, a second clapboard 10, a fixing screw rod 11, a limiting nut 12, a fixing nut 13, a locknut 14, a first normal direction fixing piece 15 and a second normal direction fixing piece 16;
a micro-motion gasket is placed at the vacant position of the first cover plate and covers the micro-motion gasket clamping slide block, a gasket clamp 18 is fixedly combined through an inner hexagon bolt, the gasket clamp is symmetrically installed in through grooves on the left side and the right side of the workbench, the force measuring sensors are symmetrically installed and placed in the through grooves, the inner sides of the force measuring sensors are in contact with the gasket clamp, and the second cover plate is fixed on the upper surface of the workbench through the inner hexagon bolt; the test piece penetrates through the through hole of the workbench from top to bottom, the bottom end fixing piece 17 at the bottom end of the workbench is fixedly connected at the lower end, and the upper end of the test piece is connected with the single-shaft fatigue testing machine through the through hole arranged on the test piece;
the first partition plate is fixed at a step of the workbench through a limiting nut, the normal load adjusting bolt passes through a threaded hole in the center of the first partition plate to be in contact with the force measuring sensor, through holes are formed in four corners of the first partition plate and the second partition plate, fixing screws can pass through the through holes, the first normal fixing piece and the second normal fixing piece are connected through bolts and fixed with stand columns on two sides of the single-axis fatigue testing machine, and the first normal fixing piece is connected with the second partition plate through the screws and clamped with the second partition plate through the fixing nut and the anti-loosening nut; the second partition plate is fixed on the fixing screw rod through a limiting nut.
The invention applies larger normal load to the test piece by adopting the bolt, has simple structure and convenient operation, can be fixed on a single-shaft fatigue testing machine, and has strong practicability; a force measuring sensor is arranged in the through groove of the workbench, so that the normal load change condition can be monitored in real time and regulated, the stability of the normal load is ensured, and the actual load condition is simulated.
The micro gasket is clamped and arranged on the first cover plate and can be replaced, and different micro pair forms are realized by replacing micro gaskets made of different materials.
The axial surface of the test piece is pasted with the second strain gauge 21, so that the axial force applied to the workpiece can be monitored in real time, and whether the change of the axial load is expected or not is detected, so that fine adjustment is performed according to deviation, the integral use efficiency of the device is improved, and the experimental result is more comprehensive and accurate.
The first strain gauges 20 are symmetrically attached to the left and right sides of the hanging part at the lower end of the workbench, and friction coefficients of a test piece can be measured.
The front end face and the rear end face of the workbench are provided with observation holes 19, so that the fracture condition of the surface of the workpiece in the fatigue test can be observed.
The lower end face of the working step ladder is provided with a working step ladder threaded hole 22 and is connected with the first partition plate through a bolt, so that the axial installation stability of the workbench is ensured.
The working principle of the invention is as follows:
when the loading device works, the first normal fixing piece and the second normal fixing piece are connected through bolts and fixed on the stand columns on two sides of the single-shaft fatigue testing machine, the approximate axial position of the whole loading device is determined, and the loading device is subjected to fine adjustment after the normal fixing is finished; and then the second clapboard is fixed on the screw rod extending out of the first method phase fixing piece through the fixing nut and the locknut.
After the fixture part in the middle is assembled after the fixture part is fixed, firstly, the micro-motion gasket is clamped at the groove of the first cover plate, then the first cover plate and the micro-motion gasket clamping slide block are connected together by utilizing the hexagon socket head cap screws, after the gasket fixture is assembled, the gasket fixture is respectively placed in the through grooves which are bilaterally symmetrical on the workbench, meanwhile, the force measuring sensor is placed outside the gasket fixture, the probe of the force measuring sensor is in direct contact with the gasket fixture, and finally, the second cover plate is fixed with the upper surface of the workbench together by utilizing the hexagon socket head cap screws.
The test piece top-down passes the through-hole of workstation, opens threaded hole on the bottom mounting, utilizes bolt and nut to be in the same place bottom mounting and the portion of hanging and the test piece of workstation below fixed, and rethread fixed part's screw hole is with bottom mounting and unipolar fatigue testing machine fixed connection, and the top is connected with unipolar fatigue testing machine through-hole and the unipolar fatigue testing machine of test piece equally, and this moment axial fixity finishes.
Screwing a normal load adjusting bolt on the first partition plate, simultaneously respectively penetrating a fixing screw rod through the first partition plate and the second partition plate which are bilaterally symmetrical, adjusting the axial position of the whole normal fixing device by adjusting the bolt on the second normal fixing piece, enabling the first partition plate to be clamped at the step of the workbench, after fine adjustment is finished, respectively realizing normal positioning on the two partition plates by utilizing a limiting nut, and simultaneously fixing the workbench and the first partition plate together by utilizing the bolt to ensure the axial stability of the workbench.
The invention can specifically control and accurately adjust the axial load, can reflect the change condition of the axial load in real time due to the fact that the strain gauge is adhered to the surface of the test piece, finely adjusts the axial load according to observation data, enables the axial load to be more in line with the expected change condition, and more accurately simulates the actual use condition. Meanwhile, a load cell is also arranged in the normal direction, so that the stability of the normal load can be ensured.
Although the embodiments of the present invention and the accompanying drawings are disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention and the appended claims, and therefore the scope of the invention is not limited to the disclosure of the embodiments and the accompanying drawings.
Claims (6)
1. The utility model provides a normal load loading device based on unipolar fatigue testing machine which characterized in that: the device comprises a normal load loading unit and a normal fixing unit, wherein the normal load loading unit comprises a test piece, a micro-motion gasket clamping slide block, a first cover plate, a second cover plate, a workbench, a force measuring sensor and a normal load adjusting bolt; the normal fixing unit comprises a first partition plate, a second partition plate, a fixing screw, a limiting nut, a fixing nut, a locknut, a first normal fixing piece and a second normal fixing piece;
the micro-motion gasket is placed at the vacant position of the first cover plate and covers the micro-motion gasket clamping slide block, a gasket clamp is fixedly combined through an inner hexagon bolt, the gasket clamp is symmetrically installed in through grooves on the left side and the right side of the workbench, the force measuring sensors are symmetrically installed and placed in the through grooves, the inner sides of the force measuring sensors are in contact with the gasket clamp, and the second cover plate is fixed on the upper surface of the workbench through the inner hexagon bolt; the test piece penetrates through the through hole of the workbench from top to bottom, the lower end of the test piece is fixedly connected with the bottom fixing piece at the bottom end of the workbench, and the upper end of the test piece is connected with the single-shaft fatigue testing machine through the through hole arranged on the test piece;
the first partition plate is fixed at a step of the workbench through a limiting nut, the normal load adjusting bolt passes through a threaded hole in the center of the first partition plate to be in contact with the force measuring sensor, through holes are formed in four corners of the first partition plate and the second partition plate, fixing screws can pass through the through holes, the first normal fixing piece and the second normal fixing piece are connected through bolts and fixed with stand columns on two sides of the single-axis fatigue testing machine, and the first normal fixing piece is connected with the second partition plate through the screws and clamped with the second partition plate through the fixing nut and the anti-loosening nut; the second partition plate is fixed on the fixing screw rod through a limiting nut.
2. The normal load loading device based on the uniaxial fatigue testing machine according to claim 1, wherein: the micro gasket is arranged on the first cover plate in a clamping mode and can be replaced.
3. The normal load loading device based on the uniaxial fatigue testing machine according to claim 1, wherein: and a second strain gauge is stuck to the axial surface of the test piece.
4. The normal load loading device based on the uniaxial fatigue testing machine according to claim 1, wherein: first strain gauges are symmetrically attached to the left side and the right side of the hanging part at the lower end of the workbench.
5. The normal load loading device based on the uniaxial fatigue testing machine according to claim 1, wherein: the front end face and the rear end face of the workbench are provided with observation holes.
6. The normal load loading device based on the uniaxial fatigue testing machine according to claim 1, wherein: the working platform is characterized in that a working step ladder threaded hole is formed in the lower end face ladder position of the working platform, a threaded hole is formed in the position corresponding to the first partition plate, and the working platform and the first partition plate are fixed through bolts penetrating the threaded hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010624899.XA CN111650063A (en) | 2020-07-02 | 2020-07-02 | Normal load loading device based on single-shaft fatigue testing machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010624899.XA CN111650063A (en) | 2020-07-02 | 2020-07-02 | Normal load loading device based on single-shaft fatigue testing machine |
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| CN111650063A true CN111650063A (en) | 2020-09-11 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112665834A (en) * | 2021-01-07 | 2021-04-16 | 北京理工大学 | Radial loading device and loading method for stress test of optical lens |
| CN113281200A (en) * | 2021-06-22 | 2021-08-20 | 浙江工业大学 | Manual controllable micro fatigue transverse loading device |
| CN113442077A (en) * | 2021-06-29 | 2021-09-28 | 盐城工学院 | Special fixture for laminated composite material drilling experiment |
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| CN104297079A (en) * | 2014-09-16 | 2015-01-21 | 南京航空航天大学 | Testing device and testing method for fretting fatigue of end-tooth structure |
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Application publication date: 20200911 |