Simulation device for unequal biaxial residual stress
The non-isotropic dual-axis residual stress simulation device addresses the high cost and complexity of existing devices by using a cross-shaped loading table with adjustable screws and optical measurement components, enabling efficient and affordable residual stress simulation.
Patent Information
- Application Number
- CN202422931691.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-29
- Publication Date
- 2025-07-15
- Estimated Expiration
- 2034-11-29
AI Technical Summary
The existing biaxial tensile testing machines are expensive and complex in operation, making it difficult to accurately simulate the residual stress state of structures such as welded joints.
Design a non-isometric biaxial residual stress simulation device, including a cross-shaped loading table, a cross-shaped cover plate, an optical measurement assembly and a bottom plate, and apply non-isometric biaxial compression and tensile residual stress through fasteners, combined with an optical measurement assembly and a slide rail device to achieve simple and low-cost stress simulation.
Residual stress simulation with simple structure, low cost and convenient operation is realized, which is suitable for structural integrity evaluation of in-service equipment.
Smart Images
Figure CN223107107U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of residual stress simulation devices, and in particular to a simulation device for non-equal biaxial residual stress. Background Art
[0002] In the prior art, how to accurately obtain the residual stress state of structures such as welded joints plays an important role in the structural integrity assessment of in-service equipment; usually, when measuring residual stress by methods such as the drilling method and the indentation method, a series of calibration tests under different residual stress states need to be carried out on the material to be measured, so as to obtain the mapping relationship between the residual stress state and the quantity to be measured; most of the existing residual stress simulation devices use biaxial tensile testing machines, and measure the magnitude of the simulated residual stress by installing strain gauges, extensometers, etc. These customized biaxial testing machines are expensive, huge in size and complex in operation, resulting in high costs for simulating residual stress. Therefore, there is room for improvement in the above technology. Summary of the Utility Model
[0003] The utility model aims to at least solve one of the technical problems existing in the prior art. For this reason, an object of the utility model is to provide a simulation device for non-equal biaxial residual stress, and the device has the advantages of simple structure, low cost and convenient operation.
[0004] The simulation device for non-equal biaxial residual stress according to an embodiment of the utility model includes: a cross-shaped loading table, a cross-shaped cover plate, an optical measurement component, a bottom plate and a cross-shaped specimen. The cross-shaped loading table is connected to the bottom plate through a first fastener, and the cross-shaped cover plate is pressed against the height baffle around the cross-shaped loading table through a second fastener; a plurality of compression force application holes are arranged on the cross-shaped loading table, and a plurality of tensile force application holes are arranged on the cover plate. The first fastener passes through the compression force application holes to apply non-equal biaxial compressive residual stress to the cross-shaped specimen, and the second fastener passes through the tensile force application holes to apply non-equal biaxial tensile residual stress to the cross-shaped specimen; the optical measurement component is connected to the bottom plate through a magnetic base, a slide rail device is arranged on the optical measurement component, and a camera is arranged on the slide rail device.
[0005] The simulation device for non-equal biaxial residual stress according to the utility model has the advantages of simple structure, low cost and convenient operation.
[0006] According to an embodiment of the utility model, the cross-shaped loading table of the simulation device for non-equal biaxial residual stress includes: a cross-shaped base and a support block. The cross-shaped base is used to calibrate the height of the cross-shaped cover plate, and the support block is used to support the cross-shaped specimen. A plurality of the compression force application holes are correspondingly arranged on the cross-shaped base.
[0007] According to an embodiment of the present utility model, in a simulation device for non-equal biaxial residual stress, a base connection hole is provided in the central region of the cross-shaped loading platform. There are multiple base connection holes, and the multiple base connection holes are used for connecting the cross-shaped loading platform and the base. The base connection hole is a through hole without threads.
[0008] According to an embodiment of the present utility model, in a simulation device for non-equal biaxial residual stress, a cover plate connection hole is further provided in the central region of the cross-shaped loading platform. There are multiple cover plate connection holes, and the multiple cover plate connection holes are used for connecting the cross-shaped loading platform and the cross-shaped cover plate. The cover plate connection hole is a threaded hole.
[0009] According to an embodiment of the present utility model, in a simulation device for non-equal biaxial residual stress, an observation hole is provided in the center of the cross-shaped cover plate. The observation hole is used to observe the speckle distribution on the surface of the cross-shaped specimen collected by the optical measurement component.
[0010] According to an embodiment of the present utility model, in a simulation device for non-equal biaxial residual stress, the cross-shaped specimen is adapted to the cross-shaped loading platform. One side of the cross-shaped specimen is arranged on the support block, and the other side of the cross-shaped specimen is used for measurement by the optical measurement component.
[0011] According to an embodiment of the present utility model, in a simulation device for non-equal biaxial residual stress, the cross-shaped specimen includes four cantilevers. The central region of the cross-shaped specimen is a region to be measured, and the region to be measured is connected to the four cantilevers.
[0012] According to an embodiment of the present utility model, in a simulation device for non-equal biaxial residual stress, a motor module is installed at the end of the slide rail device. The motor module is used to realize the movement of the slide rail device.
[0013] According to an embodiment of the present utility model, in a simulation device for non-equal biaxial residual stress, the slide rail device includes a longitudinal slide rail device and a transverse slide rail device. The longitudinal slide rail device is used to adjust the camera focus, and the transverse slide rail device is used to adjust the camera position.
[0014] According to an embodiment of the present utility model, in a simulation device for non-equal biaxial residual stress, the first fastener and the second fastener are bolts; the compression force application hole and the tension force application hole are threaded holes.
[0015] Additional aspects and advantages of the present utility model will be given in part in the following description, will become apparent in part from the following description, or will be understood through the practice of the present utility model. Description of the Drawings
[0016] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, where:
[0017] Figure 1 is a schematic structural diagram of a cross-shaped loading table according to an embodiment of the present utility model;
[0018] Figure 2 is a schematic structural diagram of a cover plate of a cross-shaped loading table according to an embodiment of the present utility model;
[0019] Figure 3 is a schematic structural diagram of an optical measurement assembly according to an embodiment of the present utility model;
[0020] Figure 4 is a schematic structural diagram of a bottom plate according to an embodiment of the present utility model;
[0021] Figure 5 is a schematic structural diagram of a cross-shaped specimen according to an embodiment of the present utility model;
[0022] Figure 6 is an installation schematic diagram of a simulation device according to an embodiment of the present utility model.
[0023] Reference numerals:
[0024] 1, cross-shaped base; 2, compression force application hole; 3, support block; 4, height baffle; 5, cover plate connection hole; 6, base connection hole; 7, observation hole; 8, tensile force application hole; 9, cross-shaped loading table connection hole; 10, magnetic seat; 11, longitudinal slide rail device; 12, motor module; 13, slider; 14, camera; 15, telecentric lens; 16, ferromagnetic bottom plate; 17, loading table connection hole; 18, cantilever; 19, area to be measured; 20, optical measurement assembly; 21, bottom plate; 22, cross-shaped cover plate; 23, cross-shaped loading table. Detailed implementation manners
[0025] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary only for explaining the present utility model and should not be construed as limiting the present utility model.
[0026] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.
[0027] The following refers to Figures 1-6 Describe a simulation device for non-equiaxial biaxial residual stress according to an embodiment of the present utility model. As Figures 1-3 shown, the simulation device for non-equiaxial biaxial residual stress according to an embodiment of the present utility model includes: a cross-shaped loading table 23, a cross-shaped cover plate 22, an optical measurement assembly 20, a bottom plate 21, and a cross-shaped specimen. Further, the cross-shaped loading table 23 is connected to the bottom plate 21 through a first fastener, and the cross-shaped cover plate 22 is pressed against the height baffle 4 around the cross-shaped loading table 23 through a second fastener; further, a plurality of compression application holes 2 are provided on the cross-shaped loading table 23, and a plurality of tension application holes 8 are provided on the cross-shaped cover plate 22. The first fastener passes through the compression application holes 2 to apply non-equiaxial biaxial compressive residual stress to the cross-shaped specimen, and the second fastener passes through the tension application holes 8 to apply non-equiaxial biaxial tensile residual stress to the cross-shaped specimen; further, the optical measurement assembly 20 is connected to the bottom plate 21 through a magnetic base 10, and a slide rail device is provided on the optical measurement assembly 20, and a camera 14 is provided on the slide rail device.
[0028] The simulation device for non-equiaxial biaxial residual stress according to the present utility model has the advantages of simple structure, low cost, and convenient operation.
[0029] For the simulation device for non-equiaxial biaxial residual stress according to an embodiment of the present utility model, the cross-shaped loading table 23 includes: a cross-shaped base 1 and a support block 3. Further, the cross-shaped base 1 is used to calibrate the height of the cross-shaped cover plate 22 to avoid direct contact between the cross-shaped cover plate 22 and the cross-shaped specimen; further, the support block 3 is used to support the cross-shaped specimen, which is convenient for applying a load to the cross-shaped specimen, so as to apply residual stress by the bending method; further, a corresponding number of compression application holes 2 are provided on the cross-shaped base 1.
[0030] In the description of the present utility model, the "first feature" and "second feature" may include one or more of such features.
[0031] According to a simulation device for non-equibiaxial residual stress according to an embodiment of the utility model, a base connecting hole 6 is provided in the central area of the cross-shaped loading platform 23, and there are multiple base connecting holes 6. Furthermore, the multiple base connecting holes 6 are used for connecting the cross-shaped loading platform 23 and the cross-shaped base 1, and the base connecting holes 6 are through holes without threads.
[0032] In the description of the present invention, "plurality" means two or more.
[0033] According to a simulation device for non-equibiaxial residual stress according to an embodiment of the utility model, a cover plate connecting hole 5 is further provided in the central area of the cross-shaped loading platform 23, and there are multiple cover plate connecting holes 5. Furthermore, the multiple cover plate connecting holes 5 are used for connecting the cross-shaped loading platform 23 and the cross-shaped cover plate 22, and the cover plate connecting holes 5 are threaded holes.
[0034] Further, in a specific embodiment, the cross-shaped base 1 may include two groups (four in each group) of force application holes, and loads can be applied to the four cantilevers 18 of the cross-shaped specimen by screwing in bolts, thereby simulating non-equibiaxial compressive residual stress in the test area 19 of the cross-shaped specimen. Further, the two groups of force application holes are respectively suitable for cross-shaped specimens with different cantilever 18 lengths; further, the center of the cross-shaped loading platform 23 includes four base connection holes for connecting the base and four cover connection holes for connecting the cross-shaped loading platform cover 22. In the description of the present utility model, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features not being in direct contact but being in contact through another feature between them.
[0035] According to the non-equibiaxial residual stress simulation device of one embodiment of the utility model, an observation hole 7 is provided at the center of the cross-shaped cover plate 22. Further, the observation hole 7 is used to observe the speckle distribution collected by the optical measurement component 20 on the surface of the cross-shaped specimen.
[0036] According to a simulation device for non-equibiaxial residual stress in one embodiment of the utility model, the cross-shaped specimen is adapted to the cross-shaped loading platform 23 , and further, one side of the cross-shaped specimen is arranged on the support block 3 , and the other side of the cross-shaped specimen is used for measuring the optical measurement component 20 .
[0037] In the description of the present invention, a first feature “above”, “over” and “above” a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.
[0038] According to an embodiment of the present utility model, for the simulation device of non-equal biaxial residual stress, the cruciform specimen includes four cantilevers 18. Further, the central region of the cruciform specimen is the region to be measured 19, and the region to be measured 19 is connected to the four cantilevers 18. In this way, by screwing a bolt through the force application hole, a deformation force is applied to the cantilever 18, and non-equal biaxial residual stress can be simulated in the region to be measured 19 of the cruciform specimen.
[0039] According to an embodiment of the present utility model, for the simulation device of non-equal biaxial residual stress, a motor module 12 is installed at the end of the slide rail device, and the motor module 12 is used to move the slide rail device. For example, in a specific embodiment, the motor module 12 is a self-locking reduction motor module. Through the self-locking reduction motor module, rapid movement and fine adjustment of the slide rail can be achieved, so as to facilitate precise focusing and positioning, and the self-locking reduction motor module can provide sufficient holding torque for the slide rail device.
[0040] According to an embodiment of the present utility model, for the simulation device of non-equal biaxial residual stress, the slide rail device includes a longitudinal slide rail device 11 and a transverse slide rail device. Further, the longitudinal slide rail device 11 is used to adjust the focus of the camera 14, and further, the transverse slide rail device is used to adjust the position of the camera 14, so as to ensure that the camera 14 can capture the region to be measured 19 of the cruciform specimen.
[0041] According to an embodiment of the present utility model, for the simulation device of non-equal biaxial residual stress, the first fastener and the second fastener are bolts; further, the compression force application hole 2 and the tensile force application hole 8 are threaded holes.
[0042] In summary, the simulation device of non-equal biaxial residual stress according to the present utility model has the advantages of simple structure, low cost, and convenient operation.
[0043] In the description of this specification, the descriptions with reference to terms such as "an embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.
[0044] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present utility model, and the scope of the present utility model is defined by the claims and their equivalents.
Claims
1. A simulation device for non-equal biaxial residual stress, characterized in that, Including: A cross-shaped loading table, a cross-shaped cover plate, an optical measurement assembly, a bottom plate, and a cross-shaped specimen. The cross-shaped loading table is connected to the bottom plate by a first fastener, and the cross-shaped cover plate is pressed against the height baffles around the cross-shaped loading table by a second fastener; a plurality of compression force application holes are provided on the cross-shaped loading table, and a plurality of tensile force application holes are provided on the cover plate. The first fastener passes through the compression force application holes to apply non-uniform biaxial compressive residual stress to the cross-shaped specimen, and the second fastener passes through the tensile force application holes to apply non-uniform biaxial tensile residual stress to the cross-shaped specimen; the optical measurement assembly is connected to the bottom plate by a magnetic base, a slide rail device is provided on the optical measurement assembly, and a camera is provided on the slide rail device.
2. The simulation device for non-equal biaxial residual stress according to claim 1, characterized in that The cross-shaped loading table includes: a cross-shaped base and support blocks. The cross-shaped base is used to calibrate the height of the cross-shaped cover plate, and the support blocks are used to support the cross-shaped specimen. A plurality of the compression force application holes are correspondingly provided on the cross-shaped base.
3. The simulation device for non-equal biaxial residual stress according to claim 2, wherein A base connection hole is provided in the central area of the cross-shaped loading table. There are a plurality of the base connection holes, which are used for connecting the cross-shaped loading table and the base. The base connection holes are through holes without threads.
4. The simulation device for non-equal biaxial residual stress according to claim 3, characterized in that, A cover plate connection hole is further provided in the central area of the cross-shaped loading table. There are a plurality of the cover plate connection holes, which are used for connecting the cross-shaped loading table and the cross-shaped cover plate. The cover plate connection holes are threaded holes.
5. The simulation device for non-equal biaxial residual stress according to claim 4, wherein An observation hole is provided in the center of the cross-shaped cover plate, which is used to observe the speckle distribution on the surface of the cross-shaped specimen collected by the optical measurement assembly.
6. The simulation device for non-equal biaxial residual stress according to claim 5, characterized in that The cross-shaped specimen is adapted to the cross-shaped loading table. One side of the cross-shaped specimen is placed on the support blocks, and the other side of the cross-shaped specimen is used for measurement by the optical measurement assembly.
7. The simulation device for non-equal biaxial residual stress according to claim 6, wherein, The cross-shaped specimen includes four cantilevers. The central area of the cross-shaped specimen is the area to be measured, and the area to be measured is connected to the four cantilevers.
8. The simulation device for non-equal biaxial residual stress according to claim 7, characterized in that, A motor module is installed at the end of the slide rail device, and the motor module is used to move the slide rail device.
9. The simulation device for non-equal biaxial residual stress according to claim 8, characterized in that, The slide rail device includes: a longitudinal slide rail device and a transverse slide rail device. The longitudinal slide rail device is used to adjust the focus of the camera, and the transverse slide rail device is used to adjust the position of the camera.
10. The simulation device for non-equal biaxial residual stress according to claim 9, characterized in that, The first fastener and the second fastener are bolts; the compression force application holes and the tensile force application holes are threaded holes.