CN217084532U - Heatable fatigue mechanics testing arrangement under pretension/compression multiple mode - Google Patents
Heatable fatigue mechanics testing arrangement under pretension/compression multiple mode Download PDFInfo
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- CN217084532U CN217084532U CN202123028250.0U CN202123028250U CN217084532U CN 217084532 U CN217084532 U CN 217084532U CN 202123028250 U CN202123028250 U CN 202123028250U CN 217084532 U CN217084532 U CN 217084532U
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Abstract
The utility model relates to a fatigue mechanics testing arrangement under heatable pretension/compression multiple mode belongs to the mechanics of materials test field. The system can integrate the load on a test piece positioned in an orthogonal plane in a clamp cabin body to carry out (pre) tension/compression-fatigue mechanical test by an axial displacement screw rod under the action of a permanent magnet alternating current motor. The method is characterized in that: the device comprises a clamp cabin, a mechanical test platform, an axial displacement screw rod fixing sleeve, an axial displacement screw rod fixing loading ribbed plate, a permanent magnet type alternating current motor, a test piece, a pressure sensor, a non-contact type capacitance displacement sensor, a test bench, a bench column, a halogen lamp, a fixing bolt, a clamping plate, a protective cover and the like. The device can realize biaxial tension in an orthogonal plane, orthogonal biaxial compression, compression in an orthogonal plane and tension in an axis, and can also realize the experiment that in the orthogonal plane, an axis is a pretension/compression load, and an axis is a tension/compression fatigue load or a biaxial tension/compression fatigue test. The multi-load mode fatigue mechanical property test under variable temperature can be carried out by the real-time focusing irradiation of the halogen lamp on the surface of the test piece. Compared with the prior art, the utility model discloses can realize the tired mechanical test under the alternating temperature environment complicated preload mode, acquire fatigue failure mechanism and performance weakening law under the complicated service condition of material, expand traditional mechanical test technique and method.
Description
Technical Field
The utility model relates to a mechanics of materials testing arrangement, especially a can realize the mechanics of fatigue testing arrangement under the complicated predress load mode of serving of different temperatures.
Background
Under the long-term service condition, the structural/functional material often meets the load under various complex working conditions, and changes along with the change of time, the change of the stress and the change of a working environment place. The reason is because many structure/function material device and test piece are in this type of operational environment for a long time, make the material take place the macroscopic failure because of receiving the load effect, damage and the evolution that its microstructure produced under the condition of being in service, traditional mechanics test system can not study mechanical material's damage mechanism and some key properties of material to lack security and reliability, consequently, for improving material mechanical test's of being in service accuracy, science and reliability, obtain fatigue failure mechanism and performance weakening law under the complicated mechanical condition of being in service of material, develop specially the utility model discloses the innovative design.
Disclosure of Invention
The utility model relates to a mechanics of materials testing arrangement, especially a can realize the mechanics of fatigue testing arrangement under the complicated predress load mode of serving of different temperatures. The device can realize biaxial stretching, orthogonal biaxial compression and uniaxial compression stretching in the orthogonal plane, and can also realize the pretension/compression of one axis in the orthogonal plane, the tensile/compressive fatigue test of one axis or the biaxial tensile/compressive fatigue test. The failure mechanism and the performance weakening rule of the material under the service working condition are revealed, and the scientificity and the accuracy of the material service mechanical test are improved.
The utility model aims at realizing through the following technical scheme:
the utility model is characterized in that the device consists of a clamp cabin body, a mechanical test platform, an axial displacement screw rod fixing sleeve, a sleeve fixing base, an axial displacement screw rod fixing loading ribbed plate, a permanent magnet type alternating current motor, a test piece, a pressure sensor, a non-contact capacitance displacement sensor, a test bench, a bench post, a halogen lamp, a fixing bolt, a clamping plate and a protective cover;
the clamp cabin body is fixed on the test bed through the fixing clamping plates on the two sides by the fastening screws, and the clamp cabin body is fixed on the test bed frame by the clamping plates on the two sides and the fastening screws so as to assemble each part and the motor and change bearing load, so that the displacement and looseness caused by the vibration generated when the test bed works are prevented;
the axial displacement screw rod is connected with the permanent magnet alternating current motor and is arranged on a sleeve fastening ribbed plate at the outer side of the clamp cabin body, the axial displacement screw rod can be driven by the permanent magnet alternating current motor to stretch and contract in a reciprocating mode to achieve the effect of applying load to a test piece, the permanent magnet alternating current motor is connected with the axial displacement screw rod fixing and loading ribbed plate through a fastening screw, under the reciprocating effect of forward and reverse rotation of the motor, the test piece can be subjected to tensile/compression load test at the same time, for a plane biaxial fatigue test piece, as the test piece is relatively small in size, the conventional heating mode cannot meet the requirement, an effective plane biaxial fatigue test piece heating method needs to be researched, and the fatigue performance of a supporting material is researched;
the pressure sensor and the displacement sensor are relatively and respectively arranged at the testing end of the axial displacement screw rod, so that information of information load can be timely and accurately obtained when a clamp applies load, the pressure sensor is arranged at the testing end of the axial displacement screw rod mounting clamp, so that the pressure sensor can timely obtain the size of the applied load when a testing device applies load, and analysis and diagnosis are carried out on testing conditions under different working conditions, and the displacement sensor adopts a non-contact capacitance displacement sensor which is used for storing and transmitting the conditions and data of testing, loading and displacement into a computer for control;
the halogen lamps and the protective covers are respectively arranged on two sides of a working surface of a cabin body of the test bed, the halogen lamps are respectively fixed on two sides of a cabin body of a clamp on the test bed through fastening screws to focus and heat a test piece, the protective covers are arranged on two sides of the cabin body of the clamp on the test bed and can be detached when not used, so that fatigue cracks or fractures of the test piece when the test piece is loaded are prevented, the cabin body is bounced out to hurt people or objects, unnecessary loss is caused, and a certain safety protection effect is achieved;
the axial displacement screw rod fixing sleeve is coaxially connected with the axial displacement screw rod, the position of the axial displacement screw rod is fixed by fixing the loading ribbed plate by the axial displacement screw rod, and a pressure sensor and a non-contact type capacitance displacement sensor are respectively arranged at the testing end of the axial displacement screw rod in order to timely capture the magnitude of force and the change condition of the load capacity of testing displacement, and the two sensors are arranged in pairs in a crossed and opposite mode.
The stand column and the rack mainly play a certain role in supporting and bearing load and installing distributed parts on the test bed respectively.
Compared with the prior art, the utility model discloses can realize the fatigue mechanics test under the alternating temperature environment complicated preload mode, acquire fatigue failure mechanism and performance weakening law under the complicated mechanical condition of being on active service of material, expanded traditional mechanics test technique and method. The system and the method can realize biaxial stretching in an orthogonal plane, orthogonal biaxial compression and uniaxial compression stretching in the orthogonal plane, realize that one axis in the orthogonal plane is pre-stretching/compression and one axis is a stretching/compression fatigue test or a biaxial stretching/compression fatigue test, can research the fatigue failure mechanism and the performance weakening rule of the material in a complex stress state, make up for the traditional mechanical test system and method, and provide a reliable test tool for improving the scientificity and accuracy of mechanical material research.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a permanent magnet ac motor of fig. 1;
FIG. 3 is a sleeve of the axial displacement screw of FIG. 1;
FIG. 4 is the halogen lamp of FIG. 1;
FIG. 5 is the axial displacement screw fixed loading rib of FIG. 1;
FIG. 6 is the axial displacement screw of FIG. 1;
FIG. 7 is the protective cover of FIG. 1;
FIG. 8 is the pressure sensor of FIG. 1;
fig. 9 is the non-contact capacitive displacement sensor of fig. 1.
In the drawings: the device comprises a permanent magnet alternating current motor 1, a permanent magnet alternating current motor 2, a longitudinal fixed loading ribbed plate of an axial displacement screw rod 3, a sleeve 4, a fastening screw of the loading ribbed plate fixed by the axial displacement screw rod 5, a clamping plate of the loading ribbed plate fixed by the axial displacement screw rod 6, a clamp cabin 7, a halogen lamp 8, an axial fixed loading ribbed plate of the axial displacement screw rod 9, an axial displacement screw rod 10, a halogen lamp base fastening screw 11, a halogen lamp base 12, a mechanical test platform 13, a supporting pillar 14, a fixed loading ribbed plate 15, a mechanical test platform loading boss 16, a clamping plate of the clamp cabin 17, an adjusting bolt of a halogen lamp support 18, a sleeve fixing base 19, a test piece 20, a test piece pin 21, a protective cover 22, a pressure sensor 23 and a non-contact type capacitance displacement sensor 24.
Detailed Description
The details of the present invention and its embodiments are further described below with reference to the accompanying drawings.
Referring to fig. 1 to 9, the present invention relates to the field of mechanical testing, and more particularly to a fatigue mechanical testing device capable of realizing different temperatures under complex service (pre) load modes. The system and the method can realize biaxial stretching in an orthogonal plane, orthogonal biaxial compression and uniaxial compression stretching in the orthogonal plane, can realize that one axis in the orthogonal plane is pre-stretching/compression, and one axis is a stretching/compression fatigue test or a biaxial stretching/compression fatigue test, can research the fatigue failure mechanism and the performance weakening rule of the material in a complex stress state, make up for the traditional mechanical test system and method, and provide a reliable test tool for improving the scientificity and accuracy of mechanical material research.
The utility model relates to a fatigue mechanics testing arrangement under heatable pretension/compression multiple mode, including permanent-magnet AC motor 1, permanent-magnet AC motor's fastening screw 2, the vertical fixed loading floor 3 of axial displacement lead screw, sleeve 4, the fastening screw 5 of the fixed loading floor of axial displacement lead screw, the splint 6 of the fixed loading floor of axial displacement lead screw, the anchor clamps cabin 7, halogen lamp 8, the axial fixed loading floor 9 of axial displacement lead screw, axial displacement lead screw 10, halogen lamp base fastening screw 11, halogen lamp base 12, mechanics test platform 13, support bench 14, fixed loading floor 15, mechanics test platform loading boss 16, the splint 17 of the anchor clamps cabin, the adjusting bolt 18 of halogen lamp support, sleeve fixing base 19, test piece 20, test piece pin 21, safety cover 22, pressure sensor 23, A non-contact capacitive displacement sensor 24.
The permanent magnet type alternating current motor 1 is connected with a longitudinal fixed loading rib plate 3 of the axial displacement screw rod through a fastening screw 5, and a positioning sleeve 4 is arranged in the permanent magnet type alternating current motor and used for assembling an axial displacement screw rod 10.
The axial displacement screw rod 10 forms an orthogonal double-shaft clamping subsystem, the axial displacement screw rod 10 can simultaneously carry out tensile/compressive load tests on a test piece through reciprocating forward and reverse rotation work of a motor under the driving action of the permanent magnet alternating current motor 1, and for a plane double-shaft fatigue test piece, as the size of the test piece is relatively small, and a conventional heating mode cannot meet requirements, an effective plane double-shaft fatigue test piece heating method needs to be researched, and fatigue performance of a supporting material needs to be researched.
The longitudinal fixed loading ribbed plates 9 of the axial displacement screw rod are respectively connected with the fixed clamping plates 17 of the axial displacement screw rod on two sides of the clamp cabin body, so that the axial displacement screw rod is positioned and the load bearing effect of the clamp cabin body during working is enhanced.
The halogen lamp 8 is respectively arranged on two sides of the clamp cabin body 7 on the test bed through the fastening screws 11 for the bases of the halogen lamps, the illumination of the halogen lamps is focused on the test piece 20 in a correlation mode, therefore, various stress-strain conditions of the test piece 20 under the heating condition can be measured, the focused heat can control the angle of the illumination of the test piece according to the adjusting bolt 18 for adjusting the halogen lamp support, the stress-strain conditions of the test piece under the normal temperature state can be used as accurate and reliable comparison, and more reliable test basis is provided for the research of optimized mechanical materials and the service of the improved structure.
The halogen lamp 8 is respectively arranged on two sides of the clamp cabin body 7 on the test bed through the fastening screws 11 for the bases of the halogen lamps, the illumination of the halogen lamps is focused on the test piece 20 in a correlation mode, therefore, various stress-strain conditions of the test piece 20 under the heating condition can be measured, the focused heat can control the angle of the illumination of the test piece according to the adjusting bolt 18 for adjusting the halogen lamp support, the stress-strain conditions of the test piece under the normal temperature state can be used as accurate and reliable comparison, and more reliable test basis is provided for the research of optimized mechanical materials and the service of the improved structure.
The fixture cabin 7 is fixed on a mechanical test platform 16 through clamping plates 17 on two sides of the fixture cabin, and is mainly used for mounting parts and working systems of the test device, and in addition, the fixture cabin 7 and the mechanical test platform 16 have the capacity of bearing applied working load.
The sleeve fixing base 19 is respectively arranged at the bottoms of the four axial displacement screw rods by fastening screws so as to play a role in positioning and protecting the axial displacement screw rods 10, and the pin 21 of the test piece is mainly used for locking the test piece 20 so as to prevent the test device from deviating, generating errors and test inaccuracy when working load is applied.
The protective covers 22 are mainly installed on two side surfaces of the fixture cabin 7, and mainly function to prevent the test piece from jumping out of the fixture cabin due to fatigue cracks and fractures of the test piece when the test piece is loaded, so as to hurt people or objects, thereby causing unnecessary loss, playing a certain safety protection role, being detachable when not in use, and being installed according to circumstances. The pressure sensor 23 is installed opposite to the non-contact capacitance displacement sensor 24, and is installed at the clamp testing end of the axial displacement screw rod 10, the pressure sensor 23 is used for transmitting the tested pressure load to the computer for control and storage through the pressure sensor 23, the non-contact capacitance displacement sensor 24 is used for storing and transmitting the tested loading displacement condition and data to the computer for control, the motor controls the output force of the axial displacement screw rod through the force sensor and transmits the output force to the computer, and the like, so that the testing conclusion is obtained according to the mechanical testing curve on the computer, and the stress strain condition, the plastic deformation, the bending fatigue deformation, the yield stress of the test piece and the condition of the maximum stress point when the test piece is subjected to fatigue fracture are judged.
Claims (8)
1. A heatable prestretching/compression fatigue mechanics testing device under multiple modes is characterized in that: the device comprises a clamp cabin body (7), a mechanical test platform (13), an axial displacement screw rod (10), a sleeve (4), a sleeve fixing base (19), a fixed loading rib plate (15), a permanent magnet type alternating current motor (1), a test piece (20), a pressure sensor (23), a non-contact type capacitance displacement sensor (24), a test bench, a bench post (14), a halogen lamp (8), a fixing bolt (11), a clamping plate (6) and a protective cover (22);
the clamp cabin body (7) is fixed on the test bench by the clamp plates (6) on two sides of the cabin body through fastening screws, the axial displacement screw rod (10) is connected with the permanent magnet type alternating current motor through the fastening screws, the sleeve (4) is coaxial with the axial displacement screw rod (10) and is connected with the fixed loading rib plate (15), the pressure sensor (23) is arranged at the test end of the mounting clamp of the axial displacement screw rod (10), the axial displacement screw rod (10) is respectively connected with the permanent magnet type alternating current motor, the lateral fixed rib plate of the axial displacement screw rod (10) is respectively connected with the motor and two ends of the outer side of the clamp cabin body (7) through the fixing screws, the halogen lamp (8) can focus and heat the test piece (20) through the light on two sides of the test bench, the halogen lamp (8) is respectively fixed on two sides of the test bench through the fastening screws, the protective cover (22) is a transparent protective cover, are respectively arranged at both sides of the clamp cabin body (7).
2. The apparatus for fatigue mechanical testing in heatable pretension/compression multiple mode according to claim 1, characterized in that: the axial displacement screw rod (10) is driven and controlled by a motor so as to apply load to the test piece (20).
3. The apparatus for fatigue mechanical testing in heatable pretension/compression multiple mode according to claim 1, characterized in that: the axial displacement screw rod (10) plays a role in axial fixation and protection, and the sleeve fixing bottom plate is fixed on the inner side surface of the clamp cabin body (7) through a fastening screw so as to be pre-tightened and prevent looseness and deviation.
4. The apparatus for fatigue mechanical testing in heatable pretension/compression multiple mode according to claim 1, characterized in that: when the pressure sensor (23) is convenient for the testing device to apply load, the pressure sensor (23) can acquire the size of the applied load in time, so that the testing conditions of different working conditions can be analyzed and judged.
5. The apparatus for fatigue mechanical testing in heatable pretension/compression multiple mode according to claim 1, characterized in that: the non-contact type capacitance displacement sensor (24) and the pressure sensor (23) are arranged oppositely, so that the magnitude of the test displacement of the applied fatigue load under different displacement conditions can be diagnosed in time.
6. The apparatus for fatigue mechanical testing in heatable pretension/compression multiple mode according to claim 1, characterized in that: the axial displacement screw rod (10) can realize the test functions of biaxial tension/compression, one shaft tension and one shaft compression in an orthogonal plane under the drive of a permanent magnet alternating current motor, and can also realize the test function of tension/compression fatigue under the action of preload.
7. The apparatus for fatigue mechanical testing in heatable pretension/compression multiple mode according to claim 1, characterized in that: the halogen lamp (8) can measure and compare the mechanical load performance of the test piece (20) heated at normal temperature.
8. The apparatus for fatigue mechanical testing in heatable pretension/compression multiple mode according to claim 1, characterized in that: the protective covers (22) are respectively arranged on two sides of the clamp cabin body (7) to prevent the fatigue crack or fracture generated by loading of the test piece (20) from jumping out of the cabin body to hurt people or objects when the test device works, so that unnecessary loss is caused, a certain safety protection effect is achieved, and the test device can be detached when not used.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123028250.0U CN217084532U (en) | 2021-12-06 | 2021-12-06 | Heatable fatigue mechanics testing arrangement under pretension/compression multiple mode |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202123028250.0U CN217084532U (en) | 2021-12-06 | 2021-12-06 | Heatable fatigue mechanics testing arrangement under pretension/compression multiple mode |
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| CN217084532U true CN217084532U (en) | 2022-07-29 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117760833A (en) * | 2024-02-20 | 2024-03-26 | 中国特种设备检测研究院 | high-pressure hydrogen environment width Wen Yushan double-shaft compression testing device |
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2021
- 2021-12-06 CN CN202123028250.0U patent/CN217084532U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117760833A (en) * | 2024-02-20 | 2024-03-26 | 中国特种设备检测研究院 | high-pressure hydrogen environment width Wen Yushan double-shaft compression testing device |
| CN117760833B (en) * | 2024-02-20 | 2024-04-19 | 中国特种设备检测研究院 | High-pressure hydrogen environment wide Wen Yushan double-shaft compression testing device |
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