CN110261239B - Force application device for testing mechanical properties of materials under coupling of volume force, surface force and temperature - Google Patents
Force application device for testing mechanical properties of materials under coupling of volume force, surface force and temperature Download PDFInfo
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- CN110261239B CN110261239B CN201910539157.4A CN201910539157A CN110261239B CN 110261239 B CN110261239 B CN 110261239B CN 201910539157 A CN201910539157 A CN 201910539157A CN 110261239 B CN110261239 B CN 110261239B
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- 238000012360 testing method Methods 0.000 title claims abstract description 111
- 239000000463 material Substances 0.000 title claims abstract description 37
- 230000008878 coupling Effects 0.000 title claims abstract description 17
- 238000010168 coupling process Methods 0.000 title claims abstract description 17
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 17
- 238000001514 detection method Methods 0.000 claims abstract description 4
- 238000010438 heat treatment Methods 0.000 claims description 22
- 229910052573 porcelain Inorganic materials 0.000 claims description 21
- 238000000034 method Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 10
- 230000001808 coupling effect Effects 0.000 claims description 8
- 238000011056 performance test Methods 0.000 claims description 7
- 238000005259 measurement Methods 0.000 claims description 4
- 210000001503 joint Anatomy 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000035882 stress Effects 0.000 description 15
- 238000002474 experimental method Methods 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000008646 thermal stress Effects 0.000 description 3
- 239000002737 fuel gas Substances 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- 238000004154 testing of material Methods 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
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- 238000010276 construction Methods 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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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
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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
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/18—Performing tests at high or low temperatures
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/02—Details
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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
- G01N2203/0014—Type of force applied
- G01N2203/0026—Combination of several types of applied forces
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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
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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
- G01N2203/022—Environment of the test
- G01N2203/0222—Temperature
- G01N2203/0226—High temperature; Heating means
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- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a force application device for testing mechanical properties of materials under volumetric force-surface force-temperature coupling. The top end of the pull rod is connected with a bearing frame of the hypergravity test cabin, the bottom end of the pull rod is connected with the upper end of the test piece through the clamping head, and the lower end of the test piece is screwed into the area loading block and fixedly connected with the area loading block; applying different surface forces to the test piece through the area loading blocks with different weights and the centrifugal force of different rotating speeds of the centrifugal machine; the lower end face of the surface force loading block is placed on the buffer device, the detection ends of the three thermocouples are welded at different positions of the test piece, the strain gauge is installed on the test piece in a welded mode, and the output ends of the three thermocouples and the strain gauge are led out through wires and connected to an external signal collector. The force application device used in the hypergravity environment can be used for testing the mechanical properties of materials in the volumetric force-surface force-temperature coupling environment, can effectively solve the problem of difficult mechanical property testing of the materials under the hypergravity, surface force and high temperature test conditions, and has the advantages of simple structure, operation scheme and higher safety coefficient.
Description
Technical Field
The invention relates to the technical field of mechanical property testing of materials, in particular to a force application device for mechanical property testing of materials under volumetric force-surface force-temperature coupling.
Background
The high-pressure turbine working blade is used as one of key components of hot end components of an aeroengine and a gas turbine, and works under coupling loading conditions such as high temperature, high pressure, high rotating speed, alternating load and the like for a long time in service, so that the high-pressure turbine working blade is a rotating component with the worst working condition in the engine, and the use reliability of the high-pressure turbine working blade directly influences the performance of the whole engine. The turbine working blade rotates around the axis of the engine at high speed during service, and the function of the turbine working blade is to utilize the expansion work of the fuel gas to convert potential energy and heat energy of the fuel gas into mechanical work of the rotor, so that the turbine working blade mainly bears the coupling effect of centrifugal load, thermal load, pneumatic load and vibration load during service. Centrifugal stress generated by centrifugal load belongs to a bending torsion structure blade with volume force, so that an stacking line and a radial line are not completely overlapped, and radial tensile stress, torsional stress and bending stress are generated at the same time. The thermal stress generated by the thermal load is closely related to the geometric constraint, and the more the geometric constraint is, the larger the thermal stress is. Aerodynamic force generated by aerodynamic load is a surface distribution pressure, belongs to area force, acts on each surface of the blade, and is unevenly distributed along the blade height and the blade width directions. Therefore, the turbine rotor blade undergoes shear deformation, tensile deformation and torsional deformation simultaneously under the coupling action of radial tensile stress, torsional stress, bending stress and thermal stress, which is clearly different from the deformation behavior in the laboratory uniaxial stress state.
But the performance data of the materials for the turbine blades of the aero-engine at present mainly come from the mechanical performance data of laboratory standard test pieces. Although the mechanical property data of the standard test piece can provide experimental basis for blade strength design to a certain extent, compared with an actual blade, the standard test piece cannot comprehensively reflect the influence of centrifugal load-thermal load coupling conditions on the microstructure and crack propagation path of the blade in the performance test process. Therefore, the prior art lacks a device and a mode capable of testing the mechanical properties of materials according to the working condition environment of the engine blade.
Disclosure of Invention
The invention aims to solve the problem of material performance test under the coupling effect of volume force, surface force and temperature under the conditions of supergravity and high temperature test, and provides a force application device which is simple to assemble, convenient to use, high in safety coefficient and applicable to mechanical performance test under the supergravity working condition.
The invention provides a force application device for testing the mechanical properties of materials under the coupling of volume force, surface force and temperature for testing the properties of the materials under the coupling environment of high rotation speed and high temperature, and solves the key problem of testing the mechanical properties of the materials under the high rotation speed. By using the device, the material mechanical property data under the coupling environment of volume force, surface force and temperature can be obtained in real time under the super-gravity environment.
The technical scheme adopted by the invention is as follows:
the force application device is arranged in the hypergravity test cabin and comprises a pull rod, a wire fixing device, a chuck, a thermocouple, a test piece, a tightening nut and a surface force loading block; the top end of the pull rod is connected with a force bearing frame of the hypergravity test cabin, and the pull rod is mainly used for bearing tensile stress generated by the coupling action of volume force and surface force in the material performance test process; the bottom end of the pull rod is connected with the upper end of the test piece through the chuck, and the test piece is a sample of the mechanical property of the material to be tested; the lower end of the test piece is provided with an external thread, and the external thread at the lower end of the test piece is screwed into a threaded hole of the area loading block and is fastened and connected through a tightening nut; the area loading block is in a block structure with adjustable self weight, and different surface forces are applied to the test piece through the area loading blocks with different weights and the centrifugal force of different rotating speeds of the centrifugal machine; the lower end surface of the surface force loading block is arranged on a buffer device, and the buffer device is arranged at the bottom of the hypergravity test cabin; the detection ends of the three thermocouples are welded at different positions of the test piece, the strain gauge is installed on the test piece, the output ends of the three thermocouples and the strain gauge are led out by wires to be connected to an external signal collector, a plurality of wire fixing devices are installed in the middle of the pull rod, and the wires are led out by the wire fixing devices and fixed in position.
The upper end face and the lower end face of the clamping head are provided with threaded holes, external threads at the bottom end of the pull rod are screwed into the threaded holes of the upper end face of the clamping head connected to the upper end face, external threads are also arranged at the upper end of the test piece, and the external threads at the upper end of the test piece are screwed into the threaded holes of the upper end face of the clamping head connected to the upper end face of the clamping head.
The top end of the pull rod is provided with an outer flange, the outer flange is provided with a fixing screw hole for connecting with a bearing device of the mechanical property test cabin of the material, and a bolt penetrates through the fixing screw hole to fix the top end of the pull rod to the bearing device of the mechanical property test cabin of the material.
The wire fixing device comprises a first fixing ring, a second fixing ring, a fixed porcelain seat and a porcelain seat protecting piece; the first fixing ring and the second fixing ring are provided with semicircular gaps, and the semicircular gaps of the first fixing ring and the second fixing ring are in butt joint to form a circular opening sleeved outside the pull rod; the porcelain seat protection piece is fixed on the side face of the second fixing ring through bolts, a fixed porcelain seat is clamped between the porcelain seat protection piece and the second fixing ring, and a hole for penetrating an output lead of the thermocouple and the strain gauge is formed in the fixed porcelain seat.
The force application device is arranged in the hypergravity environment of the centrifugal machine.
The high-gravity experimental cabin is internally provided with a high-temperature furnace, a force bearing frame, a signal collector and a wire distribution frame, wherein a buffer device is arranged at the bottom of an inner cavity of the high-temperature furnace, the force bearing frame is arranged at the top of the inner cavity of the high-temperature furnace, and a force application device is arranged between the force bearing frame and the buffer device; the lead wire output by the signal collector is connected with the conductive slip ring of the main shaft guide centrifuge of the weak signal guide centrifuge through a wire distribution frame and then is connected with the ground measurement and control center; the high-temperature furnace is provided with three strong-current independent loops, the three strong-current independent loops control heating bodies in different areas in the heating part to heat at high temperature, and the three strong-current independent loops on the ground are connected into a wire distribution frame of the hypergravity experimental cabin through a main shaft conductive slip ring of the main shaft conductive centrifuge of the centrifuge.
The beneficial effects of the invention are as follows:
the force application device used in the hypergravity environment can be used for testing the mechanical properties of materials in the volumetric force-surface force-temperature coupling environment, can effectively solve the problem of difficult mechanical property testing of the materials under the hypergravity, surface force and high temperature test conditions, and has the advantages of simple structure, operation scheme and higher safety coefficient. The device is suitable for a high gravity environment of 1g-2000g, and the temperature is from room temperature to 1250 ℃.
Drawings
FIG. 1 is a front view of a force applying device;
FIG. 2 is a three view of the construction of the tie rod;
fig. 3 is a schematic view of a wire fixing device.
FIG. 4 is a schematic structural diagram of the system for testing mechanical properties in a hypergravity environment.
In the figure: the device comprises a pull rod 1, a wire fixing device 2, a chuck 3, a thermocouple 4, a test piece 5, a tightening nut 6 and a surface force loading block 7;2-1, fixing screw holes; 3-1, a first fixing ring; 3-2 a second securing ring; 3-3, fixing the porcelain base; 3-4 porcelain base protection pieces.
Detailed Description
The invention is further described below with reference to the drawings and examples.
As shown in fig. 1, the force application device is arranged in a hypergravity test cabin and comprises a pull rod 1, a wire fixing device 2, a chuck 3, a thermocouple 4, a test piece 5, a tightening nut 6 and a surface force loading block 7; the top end of the pull rod 1 is connected with a bearing frame of the hypergravity test cabin, and the pull rod 1 is mainly used for bearing tensile stress generated by the coupling action of volume force and surface force in the material performance test process; the bottom end of the pull rod 1 is connected with the upper end of the test piece 5 through the chuck 3 and is used for fixing the test piece 5, and the test piece 5 is a sample of the mechanical property of the material to be tested.
The lower end of the test piece 5 is provided with external threads, the external threads at the lower end of the test piece 5 are screwed into threaded holes of the area loading block 7 and are tightly connected through a tightening nut 6, the test piece 5 and the surface force loading block 7 are connected through the tightening nut 6, and the tightening nut 6 is used for connecting the test piece 5 and the surface force loading block 7; the area loading block 7 is specifically a block structure with self weight capable of being adjusted, the area loading block 7 applies surface force to the test piece 5 through centrifugal force generated by self weight under the super-gravity environment, and the area loading block 7 with different weight applies different surface forces to the test piece 5 through the centrifugal force of different rotating speeds of the centrifugal machine; the lower end surface of the surface force loading block 7 is placed on a buffer device, the buffer device is placed at the bottom of the hypergravity test cabin, the buffer device is implemented by adopting the buffer block, and the buffer device prevents the test piece 5 from being broken to damage the test piece cabin in the mechanical property test process; the detection ends of three thermocouples 4 are welded at different positions of a test piece 5 and are used for testing the experimental temperature of the test piece 5, the strain gauge is arranged on the test piece 5 and used for testing the experimental temperature and the strain, the output ends of the three thermocouples 4 and the strain gauge are led out by leads to be connected to an external signal collector, a plurality of wire fixing devices 2 are arranged in the middle of a pull rod 1, and the leads are led out by the wire fixing devices 2 and are fixed in positions.
Screw holes are formed in the upper end face and the lower end face of the clamping head 3, external threads at the bottom end of the pull rod 1 are screwed into the screw holes in the upper end face of the clamping head 3 connected to the upper end face, external threads are also formed in the upper end of the test piece 5, and external threads at the upper end of the test piece 5 are screwed into the screw holes in the upper end face of the clamping head 3 connected to the upper end face, so that the bottom end of the pull rod 1 is connected with the upper end of the test piece 5 through the clamping head 3. The clamping head 3 is used for fixing a test piece 5 and is mainly used for bearing tensile stress generated by coupling action of volume force and surface force in the material performance test process.
As shown in fig. 2, an outer flange is arranged at the top end of the pull rod 1, a fixing screw hole 2-1 for connecting a material mechanical property test cabin force bearing device is formed in the outer flange, and bolts penetrate through the fixing screw hole 2-1 to fix the top end of the pull rod 1 to the material mechanical property test cabin force bearing device.
As shown in fig. 3, the wire fixing device 2 comprises a first fixing ring 3-1, a second fixing ring 3-2, a fixed porcelain seat 3-3 and a porcelain seat protecting piece 3-4; the first fixing ring 3-1 and the second fixing ring 3-2 are provided with semicircular gaps, the semicircular gaps of the first fixing ring 3-1 and the second fixing ring 3-2 are in butt joint to form a circular opening sleeved outside the pull rod 1, and the pull rod 1 is a cylindrical rod; the porcelain seat protection piece 3-4 is fixed on the side face of the second fixed ring 3-2 through bolts on two sides, a fixed porcelain seat 3-3 is clamped between the porcelain seat protection piece 3-4 and the second fixed ring 3-2, the bolts also penetrate through the fixed porcelain seat 3-3, and the fixed porcelain seat 3-3 is provided with a hole for penetrating through output leads of the thermocouple 4 and the strain gauge.
The wire fixing device 2 is used for fixing the extension wires of the thermocouple and the strain gauge and preventing the extension wires from being broken in the mechanical test process.
The force application device is arranged in the hypergravity environment of the centrifugal machine. The hypergravity test cabin is a material mechanical property test cabin under the hypergravity environment and is arranged in a hanging basket of the centrifugal machine.
As shown in fig. 4, a high-temperature furnace, a force-bearing frame, a signal collector and a wire distribution frame are also arranged in the concrete implementation hypergravity experiment cabin, a buffer device is arranged at the bottom of the inner cavity of the high-temperature furnace, the force-bearing frame is arranged at the top of the inner cavity of the high-temperature furnace, and a force application device is arranged between the force-bearing frame and the buffer device; the lead wire output by the signal collector is connected with the conductive slip ring of the main shaft guide centrifuge of the weak signal guide centrifuge through a wire distribution frame and then is connected with the ground measurement and control center; the high-temperature furnace is provided with three strong-current independent loops, the three strong-current independent loops control heating bodies 18 in different areas in the heating part to heat at high temperature, and the three strong-current independent loops on the ground are connected into a wiring frame of the hypergravity experiment cabin through a main shaft conductive slip ring of a main shaft conductive centrifuge of the centrifuge; the main shaft conductive slip ring of the main shaft conductive centrifuge of the centrifuge is connected with the power supply cabinet. The first strong current independent loop is connected with an upper heating area of the high-temperature furnace through a wire distribution frame, the second strong current independent loop is connected with a heating area in the high-temperature furnace, and the third strong current independent loop is connected with a lower heating area of the high-temperature furnace.
In the specific implementation, three independent temperature control temperature extension wires for controlling the high-temperature furnace are connected to a signal collector, and the signal collector converts the received temperature signal from an analog signal to a digital signal; the digital signal is connected with the signal slip ring through the wire distribution frame and then connected with the ground measurement and control center.
The mechanical property test working process of the device is as follows:
the first step: connecting a test piece 5 to the lower end of the pull rod 1 by using a chuck 3, and welding a thermocouple 4 and a strain gauge on the test piece 5;
and a second step of: then placing the hypergravity experiment cabin in a hanging basket of a centrifuge, placing a high-temperature furnace in the hypergravity experiment cabin, placing a buffer device at the bottom of an inner cavity of the high-temperature furnace, placing a bearing frame at the top of the inner cavity of the high-temperature furnace, placing a force application device between the bearing frame and the buffer device of the inner cavity of the high-temperature furnace, and installing a test piece 5 to be heated;
and a third step of: connecting a wire of a thermocouple welded on the surface of the test piece 5 for temperature measurement with a signal collector, wherein the signal collector receives analog signals of temperature and strain and converts the analog signals into digital signals;
fourth step: the ground three strong-current independent loops are respectively connected to the upper heating zone, the middle heating zone and the lower heating zone of the high-temperature furnace, so that the upper heating zone, the middle heating zone and the lower heating zone of the high-temperature furnace are respectively and independently heated, and different heating temperatures are set in different heating zones;
fifth step: the centrifuge rotating shaft is provided with a tachometer, a tachometer signal wire arranged on the centrifuge rotating shaft is connected with a conductive slip ring of a main shaft guide centrifuge of a weak signal guide centrifuge, the real-time temperature and the heating rate of a high-temperature furnace are controlled by three thermocouples on a heating device, the rotating speed of the centrifuge is controlled by the tachometer, and the stress F applied to a test piece 5 is calculated by the following formula:
F＝m·a＝m·R(2πN/60) 2
wherein m is the mass of the test piece 5; a is centrifugal acceleration, R is the effective distance from the test piece 5 to the axis of the rotating shaft of the centrifugal machine; n is the rotational speed of the centrifuge.
In the test process of the test piece, the stress state of the test piece is as follows: and simultaneously receives centrifugal stress generated by self weight and surface force generated by the surface force loading block.
The invention is characterized in that:
1) The stress-strain curve of the test piece in a stressed state can be obtained in real time through the strain gauge welded at the working section of the test piece, so that the dynamic stress-strain curve of the material under the centrifugal force-high temperature coupling effect can be obtained through testing, and the mechanical property result of the material can be obtained;
2) In the experimental process, the centrifugal force can be dynamically changed by controlling the rotating speed, so that the surface force applied to the test piece can be further applied;
3) Changing the surface force applied to the test piece by changing the weight of the surface force loading block;
4) The thermocouple can independently control different temperatures of the three areas of the heating device to realize uniform temperature heating or gradient heating, and then the temperature distribution of the test piece 5 can be set according to the requirement.
The invention has simple assembly and convenient use, can obtain the temperature and stress change of the sample surface in real time through the thermocouple and the strain gauge, and effectively solves the problem that the mechanical property test of the material can not be carried out in the hypergravity environment. The invention is suitable for detecting the temperature from normal temperature to 1250 ℃ in a 1g-2000g hypergravity environment.
Claims (6)
1. A force application device for testing mechanical properties of materials under the coupling of volume force, surface force and temperature is characterized in that: the force application device is arranged in the hypergravity test cabin and comprises a pull rod (1), a wire fixing device (2), a chuck (3), a thermocouple (4), a test piece (5), a tightening nut (6) and a surface force loading block (7); the top end of the pull rod (1) is connected with a bearing frame of the hypergravity test cabin, and the pull rod (1) is mainly used for bearing tensile stress generated by the coupling action of volume force and surface force in the material performance test process; the bottom end of the pull rod (1) is connected with the upper end of the test piece (5) through the chuck (3), and the test piece (5) is a sample of the mechanical property of the material to be tested; the lower end of the test piece (5) is provided with external threads, and the external threads at the lower end of the test piece (5) are screwed into threaded holes of the surface force loading block (7) and are fastened and connected through the tightening nut (6); the surface force loading block (7) is in a block structure with an adjustable self weight, and different surface forces are applied to the test piece (5) through the surface force loading blocks (7) with different weights and the centrifugal force of different rotating speeds of the centrifugal machine; the lower end surface of the surface force loading block (7) is arranged on a buffer device which is arranged at the bottom of the hypergravity test cabin; the detection ends of the three thermocouples (4) are welded at different positions of the test piece (5), the strain gauge is installed on the test piece (5), the output ends of the three thermocouples (4) and the strain gauge are led out by wires and connected to an external signal collector, a plurality of wire fixing devices (2) are installed in the middle of the pull rod (1), and the wires are led out by the wire fixing devices (2) and fixed in position.
2. The force application device for testing mechanical properties of materials under volumetric force-surface force-temperature coupling according to claim 1, wherein: the upper end face and the lower end face of the clamping head (3) are provided with threaded holes, external threads at the bottom end of the pull rod (1) are screwed into the threaded holes of the upper end face of the clamping head (3) connected with the clamping head, external threads are also arranged at the upper end of the test piece (5), and external threads at the upper end of the test piece (5) are screwed into the threaded holes of the upper end face of the clamping head (3) connected with the clamping head.
3. The force application device for testing mechanical properties of materials under volumetric force-surface force-temperature coupling according to claim 1, wherein: the top end of the pull rod (1) is provided with an outer flange, the outer flange is provided with a fixing screw hole (2-1) for connecting with a bearing device of the mechanical property test cabin of the material, and a bolt penetrates through the fixing screw hole (2-1) to fix the top end of the pull rod (1) to the bearing device of the mechanical property test cabin of the material.
4. The force application device for testing mechanical properties of materials under volumetric force-surface force-temperature coupling according to claim 1, wherein: the wire fixing device (2) comprises a first fixing ring (3-1), a second fixing ring (3-2), a fixed porcelain seat (3-3) and a porcelain seat protection piece (3-4); the first fixing ring (3-1) and the second fixing ring (3-2) are provided with semicircular gaps, and the semicircular gaps of the first fixing ring (3-1) and the second fixing ring (3-2) are in butt joint to form a circular opening sleeved outside the pull rod (1); the porcelain seat protection piece (3-4) is fixed on the side face of the second fixing ring (3-2) through bolts, a fixed porcelain seat (3-3) is clamped between the porcelain seat protection piece (3-4) and the second fixing ring (3-2), and a hole for penetrating an output lead of the thermocouple (4) and the strain gauge is formed in the fixed porcelain seat (3-3).
5. The force application device for testing mechanical properties of materials under volumetric force-surface force-temperature coupling according to claim 1, wherein: the force application device is arranged in the hypergravity environment of the centrifugal machine.
6. The force application device for testing mechanical properties of materials under volumetric force-surface force-temperature coupling according to claim 1, wherein: the high-temperature furnace, the bearing frame, the signal collector and the wire distribution frame are also arranged in the hypergravity test cabin, the buffer device is arranged at the bottom of the inner cavity of the high-temperature furnace, the bearing frame is arranged at the top of the inner cavity of the high-temperature furnace, and the force application device is arranged between the bearing frame and the buffer device of the inner cavity of the high-temperature furnace; the conducting wire output by the signal collector is connected with the conducting slip ring of the main shaft of the weak signal centrifuge through a wire distribution frame and then is connected with the ground measurement and control center; the high-temperature furnace is provided with three strong-current independent loops, the three strong-current independent loops control heating bodies (18) in different areas inside the heating body to heat at high temperature, and the three strong-current independent loops on the ground are connected into a wire distribution frame of the hypergravity test cabin through a conductive slip ring of a main shaft of the centrifugal machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910539157.4A CN110261239B (en) | 2019-06-20 | 2019-06-20 | Force application device for testing mechanical properties of materials under coupling of volume force, surface force and temperature |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910539157.4A CN110261239B (en) | 2019-06-20 | 2019-06-20 | Force application device for testing mechanical properties of materials under coupling of volume force, surface force and temperature |
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| CN110261239A CN110261239A (en) | 2019-09-20 |
| CN110261239B true CN110261239B (en) | 2024-04-05 |
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| CN201910539157.4A Active CN110261239B (en) | 2019-06-20 | 2019-06-20 | Force application device for testing mechanical properties of materials under coupling of volume force, surface force and temperature |
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| CN114526851B (en) * | 2022-04-25 | 2022-07-15 | 中国飞机强度研究所 | Method for measuring thermal stress of metal-composite material mixed structure for airplane |
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