CN114509339B - Biax residual stress calibration device that impresss - Google Patents
Biax residual stress calibration device that impresss Download PDFInfo
- Publication number
- CN114509339B CN114509339B CN202210041199.7A CN202210041199A CN114509339B CN 114509339 B CN114509339 B CN 114509339B CN 202210041199 A CN202210041199 A CN 202210041199A CN 114509339 B CN114509339 B CN 114509339B
- Authority
- CN
- China
- Prior art keywords
- cross
- residual stress
- sample
- force application
- shaped sample
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000012360 testing method Methods 0.000 claims abstract description 33
- 230000007246 mechanism Effects 0.000 claims abstract description 24
- 239000000523 sample Substances 0.000 claims description 70
- 230000003287 optical effect Effects 0.000 claims description 29
- 238000005259 measurement Methods 0.000 claims description 21
- 230000005294 ferromagnetic effect Effects 0.000 claims description 11
- 238000006073 displacement reaction Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 7
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 238000007373 indentation Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 5
- 230000005291 magnetic effect Effects 0.000 claims description 3
- 230000008569 process Effects 0.000 claims description 2
- 230000006835 compression Effects 0.000 description 12
- 238000007906 compression Methods 0.000 description 12
- 238000005452 bending Methods 0.000 description 6
- 238000009826 distribution Methods 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 238000010146 3D printing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910001234 light alloy Inorganic materials 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- 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
-
- 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
-
- 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
- G01N3/068—Special adaptations of indicating or recording means with optical indicating or recording means
-
- 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
-
- 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
- G01N2203/0254—Biaxial, the forces being applied along two normal axes of the specimen
-
- 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
- G01N2203/026—Specifications of the specimen
- G01N2203/0262—Shape of the specimen
- G01N2203/0272—Cruciform specimens
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention relates to a dual-shaft residual stress press-in calibration device, which comprises a cross-shaped sample and a force application mechanism, wherein the force application mechanism is respectively arranged at the outer sides of four shaft ends of the cross-shaped sample and is respectively detachably connected with the shaft ends, and the force application mechanism is used for applying tensile stress or compressive stress to the cross-shaped sample along the axial direction so as to simulate the residual stress; still include upper cover plate and universal support, the cross sample by the upper cover plate compresses tightly universal support is last, the middle part of upper cover plate is equipped with the central test hole that is used for the test of impressing. The invention solves the technical problem that the existing stress calibration device can only apply uniaxial or equibiaxial residual stress, so that other types of residual stress complex states can not be fully simulated and tested. In addition, the invention is suitable for detecting samples with various sizes, and greatly improves the universality.
Description
Technical Field
The invention relates to the technical field of experimental mechanics testing devices, in particular to a biaxial residual stress pressing-in calibration device.
Background
Residual stress widely exists in structures such as welding seams, 3D printing and the like, and the existence of the residual stress has non-negligible influence on the stress corrosion resistance, fatigue performance and ultimate bearing capacity of the component. Therefore, the accurate measurement of the residual stress has important significance for guaranteeing the safe service of the structure containing the residual stress. Compared with the traditional residual stress detection means such as a drilling method, the pressing method is used as a detection means which is almost lossless and convenient to operate, and has a good application prospect in residual stress evaluation.
The key point of the indentation method for measuring residual stress is to calibrate the indentation response under different stress states of a material with the same work hardening behavior as the measured material. In consideration of the complexity of the residual stress state in the actual structure, the calibration should comprise various combinations of residual stresses such as uniaxial stretching, uniaxial compression, equibiaxial stretching, equibiaxial compression, non-equibiaxial stretching, non-equibiaxial compression and non-equibiaxial stretching compression as far as possible. However, the conventional residual stress calibration device can only apply uniaxial or equibiaxial residual stress, and has the disadvantages of larger sample size requirement, poor matching with the press-in test, and incapability of conveniently installing an optical measurement module.
In addition, the existing dual-axis residual stress calibration device mostly adopts a bending mode (along the vertical direction of a sample) to apply stress, and residual stress simulation is realized after bending moment conversion, so that the device is complicated in specific operation and data processing, and even force application on two sides is difficult to ensure due to the fact that the stress is applied in the bending mode, off-line displacement in digital image acquisition and virtual strain are caused easily due to sample tilting or side turning, and the subsequent press-in test is influenced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a dual-shaft residual stress pressing-in calibration device, which solves the technical problem that the prior stress calibration device can only apply single-shaft or equi-dual-shaft residual stress so as to not fully simulate and test the complex state of other types of residual stress.
The technical scheme adopted by the invention is as follows:
The double-shaft residual stress press-in calibration device comprises a cross-shaped sample and a force application mechanism, wherein the force application mechanism is respectively arranged at the outer sides of four shaft ends of the cross-shaped sample and is respectively detachably connected with the shaft ends, and the force application mechanism is used for applying tensile stress or compressive stress to the cross-shaped sample along the axial direction so as to simulate the residual stress; still include upper cover plate and universal support, the cross sample by the upper cover plate compresses tightly universal support is last, the middle part of upper cover plate is equipped with the central test hole that is used for the test of impressing.
The further technical scheme is as follows:
the force application mechanism is connected with the base through a fastener and is symmetrically distributed by taking the sample as a center; each force application mechanism comprises a motor, a speed reducer, a force application pin and a load sensor, wherein one end of the force application pin is connected with the output of the speed reducer, and the other end of the force application pin is connected with the shaft end.
When the cross-shaped test sample is used, the force application directions of the two groups of force application mechanisms at opposite positions are opposite, so that the center of the cross-shaped test sample after residual stress is applied is ensured to be unchanged.
The upper cover plate is detachably connected with the base, the center of the center test hole is coaxial with the center of the cross-shaped sample, the outer ring of the upper cover plate, which is positioned in the center test hole, is provided with a mounting hole for a force application bolt, and the force application bolt is used for pressing the cross-shaped sample from the upper surface.
The universal support is detachably connected with the base, the height of the universal support is adjustable, the upper surface of the universal support is a supporting surface, and the supporting surface is coaxially arranged with the cross sample and is used for being in contact with the middle position of the bottom surface of the cross sample.
The universal support is connected with the base through a stud, an upper nut and a lower nut are arranged on the stud, the upper nut is used for adjusting the height of the universal support, and the lower nut is used for fastening and connecting the stud with the base.
In use, the fastening of the cross-shaped sample and the compensation of the out-of-plane displacement are accomplished by rotating the upper nut, wherein the rotation angle of the nut is adjusted as requiredCalculated by the following formula:
In the method, in the process of the invention, For sample thickness variation, E, v are respectively the young's modulus and poisson's ratio of the sample material, H is the thickness of the sample, σ 1 and σ 2 are the residual stress applied to the sample, the tensile stress is positive, and the compressive stress is negative; pi is the circumference ratio, and P is the pitch of the stud used for the universal support.
The supporting surface is circular, and the diameter of the circular shape is 1-3 times of the width of the middle shaft section of the cross-shaped sample.
The base is used for installing the press-in detector and the optical measurement module.
The base is provided with a ferromagnetic connecting seat, the structure of the optical measurement module comprises an optical measurement device, a supporting structure with adjustable height, and a magnetic meter seat arranged at the bottom of the supporting structure and used for being connected with the ferromagnetic connecting seat in a matched mode.
The beneficial effects of the invention are as follows:
the invention can apply any combination of biaxial stress to simulate residual stress, and can ensure that the center of the pressed-in sample after stress application is kept in place. The force application device is used for realizing various residual stress combinations along the axial direction, including uniaxial stretching, uniaxial compression, equibiaxial stretching, equibiaxial compression, non-equibiaxial stretching, non-equibiaxial compression and non-equibiaxial stretching compression, and various complex residual stress states can be simulated and tested.
Compared with the existing device for applying the residual stress in a bending mode, the device provided by the invention has the advantages that the applied residual stress is uniformly distributed along the thickness direction, the thickness of a test sample is not limited, and the sample cannot tilt. Any combination of biaxial stresses can be applied to simulate residual stresses and ensure that the center of the pressed-in specimen remains in place after the stress is applied. And bending moment conversion calculation is not needed, so that the degree of automation is high, and the positioning and testing precision is effectively improved.
The invention provides center positioning for the sample through the universal support and ensures the fastening of the sample after stress application. The compensation of out-of-plane displacement is realized through the height adjustment of the universal support, the digital image acquisition precision is ensured, and the problems of virtual focus and virtual strain are avoided.
According to the application, a detachable combined structure is formed by the base, the optical test module and the press-in tester, so that the press-in tester and the optical measurement module can be conveniently replaced, the press-in of the press-in tester pressure head of the instrument in the center area of the cross press-in sample can be ensured, the strain distribution of the center area of the cross press-in sample is measured by an optical means, the disassembly and assembly are convenient, the convenience is provided for digital image acquisition, and the matching degree of optical measurement and press-in test results is improved.
The application overcomes the defect that the existing calibration device can only apply uniaxial or equibiaxial residual stress, is suitable for various sample sizes, and has good universality.
Drawings
Fig. 1 is a top view of the device of the present invention.
Fig. 2 is a cross-sectional view of the device of the present invention.
Fig. 3 is a schematic view of the upper cover plate structure of the device of the present invention.
Fig. 4 is a cross-sectional view of an optical measurement module of the device of the present invention.
In the figure: 1. a base; 2. a force application mechanism; 3. a cross-shaped sample; 4. a ferromagnetic connecting seat; 5. an upper cover plate; 6. a universal support; 6-1, installing a nut; 6-2, lower nut; 7. a central test hole; 8. a force-applying bolt; 9. a stud; 10. an inner ring threaded hole; 11. an outer ring threaded hole; 12. a level gauge; 13. an industrial camera; 14. fastening a knob; 15. a light source; 16. an optical lens; 17. a slide rail; 18. a magnetic gauge stand.
Detailed Description
The following describes specific embodiments of the present invention with reference to the drawings.
The device for calibrating the biaxial residual stress in the embodiment comprises a cross-shaped sample 3 and a force application mechanism 2, as shown in fig. 1, wherein the force application mechanism 2 is respectively arranged on the outer sides of four shaft ends of the cross-shaped sample 3 and is detachably connected with the shaft ends through connecting pieces, and the force application mechanism 2 is used for applying tensile stress or compressive stress to the cross-shaped sample 3 along the axial direction so as to simulate the residual stress; as shown in fig. 2, the device further comprises an upper cover plate 5 and a universal support 6, when in use, the cross-shaped sample 3 is pressed on the universal support 6 by the upper cover plate 5, and a central test hole 7 for pressing in test is formed in the middle of the upper cover plate 5.
The biaxial residual stress pressing calibration device of the embodiment can directly apply tensile stress and compressive stress in the axial direction of four shaft sections forming a cross-shaped sample in a plane through the force application mechanism 2, and the force application direction is shown as an arrow direction in fig. 1.
By controlling the magnitude and direction of the urging force of the urging mechanism 2, various combinations of residual stresses including uniaxial stretching, uniaxial compression, equibiaxial stretching, equibiaxial compression, non-equibiaxial stretching, non-equibiaxial compression, and non-equibiaxial tension and compression can be applied without obtaining a residual stress simulation by urging force in the vertical direction and then bending moment conversion. And is suitable for samples of various sizes.
The four force applying mechanisms 2 are arranged in total, are respectively connected with the base 1 through fastening bolts and other fastening pieces, and are symmetrically distributed by taking the sample as a center; each force application mechanism comprises a motor, a speed reducer, a force application pin and a load sensor, wherein one end of the force application pin is connected with the output of the speed reducer, and the other end of the force application pin is connected with the shaft end.
The upper cover plate 5 of this embodiment is detachably connected with the base 1, as shown in fig. 3, the middle part of the upper cover plate 5 is provided with a central test hole 7 for press-in test and convenient digital image acquisition on the surface of a pressed sample, and the center of the central test hole 7 is coaxially arranged with the center of a cross sample.
Specifically, the outer ring of the upper cover plate 5, which is located in the central test hole 7, is provided with mounting holes for the force application bolts 8, which are named as inner ring threaded holes 10 shown in fig. 3, and four holes are formed in total. As shown in fig. 2, four forcing bolts 8 pass through the inner ring screw holes 10 to press the cross-shaped specimen 3 from the upper surface.
Specifically, outer ring threaded holes 11 are formed in four corners of the outer ring of the central test hole 7 of the upper cover plate 5, and as shown in fig. 2, the upper cover plate 5 passes through the outer ring threaded holes 11 through four studs 9 to be fixedly connected with the base 1.
As shown in fig. 2, the bottom of the universal support 6 of the present embodiment is also detachably connected with the base 1 through a stud, on which an upper nut 6-1 and a lower nut 6-2 are provided, the upper nut 6-1 is used for adjusting the height of the universal support 6, and the lower nut 6-2 is used for fastening and connecting the stud with the base 1.
Specifically, the upper surface of the universal support 6 is a support surface, and the support surface is coaxially arranged with the cross-shaped sample 3 and is used for being in contact with the middle part of the bottom surface of the cross-shaped sample 3.
Specifically, the supporting surface is circular, and the diameter of the circular is 1-3 times of the width of the intermediate shaft section of the cross-shaped sample.
In particular, the diameter of the stud at the bottom of the universal support 6 should be no less than the width of the intermediate shaft section of the cross-shaped specimen.
Specifically, the universal support 6 is made of cemented carbide.
When the cross-shaped test sample is used, two groups of motors at opposite positions can be uniformly controlled by the same encoder, and are set to have the same displacement and opposite force application directions so as to ensure that the center of the cross-shaped test sample after residual stress is applied is kept unchanged.
After the stress is applied, the sample thickness change Δh is calculated by the following formula:
Where E, v are Young's modulus and Poisson's ratio, H is the thickness, σ 1 and σ 2 are residual stress applied to the specimen, the tensile stress is positive, and the compressive stress is negative.
Fastening of cross-shaped sample and compensation of out-of-plane displacement is accomplished by rotating upper nut 6-1, wherein the nut rotation angle is adjusted as desiredCalculated by the following formula:
Where pi is the circumference ratio, ΔH is the sample thickness variation, and P is the pitch of the stud used for universal support.
As shown in fig. 1, a ferromagnetic connection base 4 is mounted on a base 1 of the present embodiment, and is used for mounting a press-in detector, an optical measurement module, and the like.
The dual-shaft residual stress press-in calibration device can be matched with an optical measurement device and a press-in tester.
As shown in fig. 4, the structure of the optical measurement module includes:
optical measuring device: an industrial camera 13, an optical lens 16 connected to the industrial camera 13, and a light source 15;
Height-adjustable support structure: a cross beam, a fastening knob 14 and a slide rail 17;
and a magnetometer mount 18 disposed at the bottom of the support structure.
The magnetometer holder 18 is used for being matched and connected with the ferromagnetic connecting seat 4. By adjusting the switch of the magnetometer mount 18, a quick connection and disconnection of the optical measurement module to the base 1 can be achieved. The two slide rails 17 are parallel to each other and are vertically arranged with the base, and two ends of the cross beam are respectively arranged at the positions of the slide rails 17 on the slide rails 17 through the fastening knob 14 so as to adjust the height.
Specifically, the cross beam comprises two concentric circular holes, and the diameter of the circular hole connected with the upper surface of the cross beam (namely, far away from the base circular hole) is larger than the diameter of the circular hole connected with the lower surface of the cross beam (namely, close to the base circular hole). The light source is fixed on the lower surface of the beam through a magnet, the industrial camera 13 is arranged in a round hole connected with the upper surface of the beam, and the optical lens 16 connected with the industrial camera passes through the round hole connected with the lower surface of the beam. The upper surface of the beam is provided with a level 12 to determine the levelness of the beam.
Specifically, the base itself adopts light alloy, and the quick location and the assembly and disassembly of the press-in detector and the optical measurement module provided with the magnetometer base are facilitated through the ferromagnetic connecting seat on the base.
For cross-shaped samples, residual stress distribution can be estimated by load cell readings, and strain distribution of the cross-shaped pressed-in sample central region after stress application can also be determined by optical measurement (such as digital image correlation techniques). After the residual stress measurement is completed, the optical measurement module is quickly disassembled, the press-in detector is replaced, and the ferromagnetic connecting seat on the base can ensure that the press-in detector press-in head of the instrument is pressed in the center area of the cross press-in sample. And after the press-in test is finished, separating the magnetometer seat of the press-in detector from the ferromagnetic connecting seat, replacing the optical measuring module again, and collecting images of residual contours and strain distribution on the surface of the press-in sample.
The residual stress press-in calibration device provided by the application adopts a modularized design. By adopting four force application mechanisms which are symmetrically distributed, any combined biaxial stress can be applied to the pressed-in sample according to test requirements so as to simulate residual stress, and the center of the pressed-in sample after the stress is applied can be ensured to be kept in place. The ferromagnetic connecting seat on the base provides convenience for quick positioning, assembly and disassembly of the press-in detector and the optical measurement module provided with the magnetometer seat, and can ensure that (1) the strain distribution of the center area of the cross press-in sample after stress is applied is determined in an optical measurement mode (such as a digital image related technology); (2) The optical measurement module is quickly disassembled, the press-in detector is replaced, and the press-in of the press-in detector of the instrument in the center area of the cross press-in sample is ensured; (3) And after the indentation test is finished, the indentation detector is quickly disassembled, the optical measurement module is replaced, and the image acquisition of the residual profile and the strain distribution on the surface of the indentation sample is carried out. The fastening of the pressed-in sample and the compensation of the out-of-plane displacement can be completed by rotating the upper nut, so that the digital image acquisition precision is ensured.
Those of ordinary skill in the art will appreciate that: the above is only a preferred embodiment of the present invention, and the present invention is not limited thereto, but it is to be understood that the present invention is described in detail with reference to the foregoing embodiments, and modifications and equivalents of some of the technical features described in the foregoing embodiments may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The double-shaft residual stress press-in calibration device comprises a cross-shaped sample and a force application mechanism, and is characterized in that the force application mechanism is respectively arranged at the outer sides of four shaft ends of the cross-shaped sample and is respectively detachably connected with the shaft ends, and the force application mechanism is used for applying tensile stress or compressive stress to the cross-shaped sample along the axial direction so as to simulate the residual stress; the device also comprises an upper cover plate and a universal support, wherein the cross-shaped sample is pressed on the universal support by the upper cover plate, and a central test hole for press-in test is formed in the middle of the upper cover plate;
the universal support is detachably connected with the base, the height of the universal support is adjustable, the upper surface of the universal support is a supporting surface, and the supporting surface is coaxially arranged with the cross-shaped sample and is used for being in contact with the middle position of the bottom surface of the cross-shaped sample;
the universal support is connected with the base through a stud, an upper nut and a lower nut are arranged on the stud, the upper nut is used for adjusting the height of the universal support, and the lower nut is used for fastening and connecting the stud with the base;
in use, the fastening of the cross-shaped sample and the compensation of the out-of-plane displacement are accomplished by rotating the upper nut, wherein the rotation angle of the nut is adjusted as required Calculated by the following formula:
In the method, in the process of the invention, For sample thickness variation, E, v are respectively the young's modulus and poisson's ratio of the sample material, H is the thickness of the sample, σ 1 and σ 2 are the residual stress applied to the sample, the tensile stress is positive, and the compressive stress is negative; pi is the circumference ratio, and P is the pitch of the stud used for the universal support.
2. The biaxial residual stress press-in calibration device according to claim 1, wherein the force applying mechanism is connected with the base through a fastener and is symmetrically distributed with the sample as a center; each force application mechanism comprises a motor, a speed reducer, a force application pin and a load sensor, wherein one end of the force application pin is connected with the output of the speed reducer, and the other end of the force application pin is connected with the shaft end.
3. The device for calibrating the pressing-in of the double-shaft residual stress according to claim 2, wherein when the device is used, the application directions of the two sets of application mechanisms at opposite positions are opposite, so that the center of the cross-shaped sample after the residual stress is applied is kept unchanged.
4. The dual-shaft residual stress press-in calibration device according to claim 1, wherein the upper cover plate is detachably connected with the base, the center of the center test hole is coaxially arranged with the center of the cross-shaped sample, and the outer ring of the upper cover plate, which is positioned in the center test hole, is provided with a mounting hole of a force application bolt, and the force application bolt is used for pressing the cross-shaped sample from the upper surface.
5. The biaxial residual stress press-in calibration device according to claim 1, wherein the supporting surface is circular, and the diameter of the circular is 1 to 3 times the width of the intermediate shaft section of the cross-shaped sample.
6. The biaxial residual stress press-in calibration device according to claim 1, wherein the base is used for mounting a press-in detector and an optical measurement module.
7. The device for calibrating the biaxial residual stress indentation of the optical measuring module according to claim 6, wherein the base is provided with a ferromagnetic connecting seat, the structure of the optical measuring module comprises an optical measuring device, a supporting structure with adjustable height, and a magnetic gauge stand arranged at the bottom of the supporting structure and used for being connected with the ferromagnetic connecting seat in a matching manner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210041199.7A CN114509339B (en) | 2022-01-14 | 2022-01-14 | Biax residual stress calibration device that impresss |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210041199.7A CN114509339B (en) | 2022-01-14 | 2022-01-14 | Biax residual stress calibration device that impresss |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114509339A CN114509339A (en) | 2022-05-17 |
| CN114509339B true CN114509339B (en) | 2024-06-04 |
Family
ID=81550395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210041199.7A Active CN114509339B (en) | 2022-01-14 | 2022-01-14 | Biax residual stress calibration device that impresss |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114509339B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115077760B (en) * | 2022-06-21 | 2023-09-26 | 中国航发贵州黎阳航空动力有限公司 | Residual stress test auxiliary device and test method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507318A (en) * | 2011-10-20 | 2012-06-20 | 中国人民解放军装甲兵工程学院 | Equi-biaxial residual stress applying device |
| CN108871671A (en) * | 2018-07-19 | 2018-11-23 | 浙江工业大学 | A kind of introducing device of any residual stress of plane |
| CN110095216A (en) * | 2019-05-31 | 2019-08-06 | 南京工程学院 | A kind of two dimension prestress application device and its working method |
| CN110530718A (en) * | 2019-08-29 | 2019-12-03 | 江苏大学 | A kind of twin shaft residual stress introducing device based on white light interferometric surface topography |
| CN110595658A (en) * | 2019-09-27 | 2019-12-20 | 浙江工业大学 | Residual stress introducing device capable of keeping central position motionless |
| CN110608834A (en) * | 2019-09-26 | 2019-12-24 | 浙江工业大学 | Double-shaft prestress applying device capable of avoiding bending stress |
-
2022
- 2022-01-14 CN CN202210041199.7A patent/CN114509339B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507318A (en) * | 2011-10-20 | 2012-06-20 | 中国人民解放军装甲兵工程学院 | Equi-biaxial residual stress applying device |
| CN108871671A (en) * | 2018-07-19 | 2018-11-23 | 浙江工业大学 | A kind of introducing device of any residual stress of plane |
| CN110095216A (en) * | 2019-05-31 | 2019-08-06 | 南京工程学院 | A kind of two dimension prestress application device and its working method |
| CN110530718A (en) * | 2019-08-29 | 2019-12-03 | 江苏大学 | A kind of twin shaft residual stress introducing device based on white light interferometric surface topography |
| CN110608834A (en) * | 2019-09-26 | 2019-12-24 | 浙江工业大学 | Double-shaft prestress applying device capable of avoiding bending stress |
| CN110595658A (en) * | 2019-09-27 | 2019-12-20 | 浙江工业大学 | Residual stress introducing device capable of keeping central position motionless |
Non-Patent Citations (2)
| Title |
|---|
| 橡胶等双轴拉伸十字形试样的设计与有限元分析;周华森;杨晓翔;;橡胶工业(第10期);全文 * |
| 激光冲击7050铝合金薄板试样形成残余应力洞的机制;曹宇鹏;周东呈;冯爱新;花国然;蒋苏州;;中国激光(第11期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114509339A (en) | 2022-05-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5851613B2 (en) | Portable digital display hardness tester | |
| US5020357A (en) | Calibration stand for sensor | |
| US8132447B2 (en) | Universal testing machine | |
| CN105973694A (en) | Nano indentation testing device under stretch-four-point bending preload | |
| US5585570A (en) | Rising step-load test apparatus | |
| CN104913974A (en) | Material micro-mechanical property biaxial tension-fatigue test system and test method thereof | |
| CN204718885U (en) | Material Micro Mechanical Properties is biaxial stretch-formed-fatigue test system | |
| JPS586882B2 (en) | extensometer | |
| CN114509339B (en) | Biax residual stress calibration device that impresss | |
| CN106996897B (en) | Neutron diffraction height Wen Cejiao instrument and special mechanical loading device thereof | |
| CN112857989B (en) | Device for testing in-situ mechanical properties of pipe under service working condition | |
| WO2013135026A1 (en) | Portable digital display hardness measuring device | |
| CN103499489B (en) | A kind of across yardstick, various visual angles in-situ mechanical motion capture test platform | |
| CN114719752A (en) | Method for measuring geometric parameters of precision part based on universal tool microscope and measuring head | |
| CN110726636A (en) | Four-axis centering adjustment system and method for biaxial tensile testing machine | |
| US6622571B2 (en) | Apparatus for measuring tension and stress capable of adjusting an angle of measurement | |
| CN113484339A (en) | Large-diameter pipeline welding line detection device based on residual stress gauge and detection method thereof | |
| CN103293058B (en) | Crack monitoring device | |
| CN210664312U (en) | Flatness detection device | |
| JP3162609U (en) | Thin plate testing machine | |
| CN101788252B (en) | Adjustable and movable lever indicator bracket on test flat plate and application method thereof | |
| CN112964586A (en) | Auxiliary device for measuring Rockwell hardness of metal inclined plane | |
| CN110608658A (en) | Flatness detection device and flatness detection method | |
| CN220019203U (en) | Measuring device for creep test of slow tensile corrosion | |
| CN217465603U (en) | Measuring device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |