CN115266434B - Carbon-carbon composite material anti-fatigue detection equipment - Google Patents
Carbon-carbon composite material anti-fatigue detection equipment Download PDFInfo
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- CN115266434B CN115266434B CN202211172117.9A CN202211172117A CN115266434B CN 115266434 B CN115266434 B CN 115266434B CN 202211172117 A CN202211172117 A CN 202211172117A CN 115266434 B CN115266434 B CN 115266434B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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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
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0058—Kind of property studied
- G01N2203/0069—Fatigue, creep, strain-stress relations or elastic constants
- G01N2203/0073—Fatigue
Abstract
The invention relates to the technical field of anti-fatigue detection, in particular to carbon-carbon composite material anti-fatigue detection equipment, which comprises: the detection machine base is fixedly provided with a control terminal, the surface of the detection machine base is fixedly provided with a driving motor, a driving end seat and a load end seat which are positioned on the same horizontal straight line, and the transduction connecting structure and the load rheostat are respectively and slidably arranged on the surfaces of the driving end seat and the load end seat. Through setting up transduction connection structure, utilize motion pivot and transducing dish to rotate and reciprocating motion in the inside of quiet baffle and reciprocal baffle respectively under driving motor's drive, export driving motor's rotating mechanical energy, convert the rotation and reciprocal bulldozing of spline shaft coupling one end into, twist reverse and extrusion deformation to the one end that detects the tablet, the tablet carries out distortion deformation and bending deformation in multiple motion uses the scene with better simulation in step.
Description
Technical Field
The invention relates to the technical field of anti-fatigue detection, in particular to carbon-carbon composite material anti-fatigue detection equipment.
Background
The carbon-carbon composite material is a carbon matrix composite material reinforced by carbon fibers and fabrics thereof, has the advantages of low density, high strength, high specific modulus, high thermal conductivity, low expansion coefficient, good friction performance, good thermal shock resistance, high dimensional stability and the like, is a few of alternative materials applied at 1650 ℃ at present, has the highest theoretical temperature as high as 2600 ℃, and is considered to be one of high-temperature materials with the greatest development prospect. Fatigue fracture toughness is an important parameter for the fracture performance of pyrolytic carbon materials, and characterizes the ability of a material to resist crack propagation and brittle fracture, generally denoted by KIC. The method has the advantages that the fatigue fracture toughness value of the material is accurately tested, factors influencing the fatigue fracture toughness of the material are researched, the fracture performance of the pyrolytic carbon can be determined and improved, and the method has important significance on damage tolerance and a service life prediction program of the carbon-carbon composite material.
At present, the material fatigue resistance detection equipment mainly makes the stress of the material deform by reciprocating pressurization on the surface of the material, so that the working state of the material in use is simulated through a plurality of times of impact, the simulation can only react the stress effect of the material in a single direction, complex deformation such as torsion of the material cannot be tested, the fatigue resistance of the material in a load state cannot be tested, single test of a test result has contingency, and detection data cannot accurately reflect the comprehensive fatigue resistance of the material, so that certain defects exist.
In view of this, research and improvement are carried out to solve the existing problems, and a carbon-carbon composite material anti-fatigue detection device is provided to solve the problems that the existing detection data is single and the load test cannot be carried out, so as to achieve the purposes of solving the problems and improving the practical value through the technology.
Disclosure of Invention
The present invention is directed to solving one of the technical problems of the prior art or the related art.
Therefore, the technical scheme adopted by the invention is as follows: carbon-carbon composite material antifatigue check out test set includes: the detection device comprises a detection machine base, an energy conversion connecting structure, a load rheostat and a constant temperature heater embedded and installed on the surface of the detection machine base, wherein a control terminal is fixedly installed on the surface of the detection machine base, a driving motor, a driving end seat and a load end seat which are positioned on the same horizontal straight line are fixedly installed on the surface of the detection machine base, the energy conversion connecting structure and the load rheostat are respectively installed on the surfaces of the driving end seat and the load end seat in a sliding mode, an input shaft and a driven shaft are respectively rotatably sleeved on the surfaces of the driving end seat and the load end seat in a sleeved mode, and one end of the input shaft is fixedly connected with the output end of the driving motor through a coupler;
the transduction connecting structure comprises a static guide plate, a moving shaft pin, a spline coupler, a reciprocating guide plate and a transduction disc fixedly sleeved on the surface of the moving shaft pin, the moving shaft pin is rotatably sleeved on the inner sides of the static guide plate and the reciprocating guide plate, one end of the moving shaft pin is slidably sleeved on the inner side of the spline coupler, one end of the spline coupler is fixedly connected with the end part of a driven shaft, and the transduction disc is positioned in the reciprocating guide plate; the load rheostat comprises a first control end box, a fluid rotating box, a second control end box, an electromagnet and a rotating shaft which is rotatably sleeved on the inner side of the first control end box and the fluid rotating box, wherein one end of the rotating shaft is fixedly connected with the end part of a driven shaft, a plurality of resistance pulp plates which are positioned on the inner side of the fluid rotating box are fixedly arranged at the other end of the rotating shaft, the fluid rotating box is filled with magnetic fluid, and an adjusting seat which is fixed on the surface of a load end seat is slidably arranged on the bottom surface of the second control end box.
The present invention in a preferred example may be further configured to: the control terminal is internally provided with a controller, the surface of the control terminal is provided with a control panel, the input ends of the driving motor, the load rheostat and the constant temperature heater are electrically connected with the output end of the controller, and the constant temperature heater is of a PCT heater structure.
The invention in a preferred example may be further configured to: the input shaft, the driven shaft, the moving shaft pin, the spline coupler and the rotating shaft are located on the same horizontal straight line, and jigs are fixed to one end of the moving shaft pin and one end of the load end seat through threads.
The present invention in a preferred example may be further configured to: the movable shaft pin structure is characterized in that a first abutting groove is formed in one side of the movable shaft pin, a plurality of first abutting pins are arranged on the inner side of the static guide plate, one side of each first abutting pin is in sliding abutting joint with the surface of the corresponding first abutting groove, the number of the first abutting grooves is a plurality of grooves which are evenly distributed on the surface of the movable shaft pin in the circumferential direction, and the adjacent movable shaft pins are connected end to end.
The present invention in a preferred example may be further configured to: the inner side of the reciprocating guide plate is provided with a plurality of second offsets, the surface of the energy conversion plate is provided with a plurality of second abutting grooves which correspond to the second offsets one by one, the surfaces of the second abutting grooves are in sliding abutting joint with the surfaces of the second offsets, and the number of the second abutting grooves is different from that of the first abutting grooves.
The present invention in a preferred example may be further configured to: the surface of the static guide plate is fixedly provided with a sliding guide pin which is sleeved on the surface of the reciprocating guide plate in a sliding mode, the surface of the static guide plate is provided with a spring of which the other end is abutted to the surface of the reciprocating guide plate, and the bottom surface of the moving guide plate is provided with a sliding seat fixed on the surface of the driving end seat in a sliding mode.
The present invention in a preferred example may be further configured to: the quantity of electromagnet is a plurality of, and is a plurality of the electromagnet is equallyd divide for two sets ofly and evenly arranges in the inboard of first control end box and second control end box, first control end box and second control end box respectively fixed mounting change the both sides of box in the fluid.
The present invention in a preferred example may be further configured to: the periphery of the resistance paddle board is in sliding butt joint with the inner side of the fluid rotating box, and a plurality of overflowing holes which are uniformly distributed are formed in the surface of the resistance paddle board.
The beneficial effects obtained by the invention are as follows:
1. according to the invention, by arranging the transduction connecting structure, the motion shaft pin and the transduction disc are driven by the driving motor to respectively rotate and reciprocate in the static guide plate and the reciprocating guide plate, the rotary mechanical energy of the driving motor is output and converted into the rotation and reciprocating pushing of one end of the spline coupler, one end of the detection material sheet is twisted and extruded to deform, and the material sheet synchronously performs various motions so as to better simulate the twisting deformation and the bending deformation in a use scene.
2. According to the invention, by arranging a novel load structure, a fluid rotating box structure filled with magnetorheological fluid is utilized to generate load resistance to the movement of one end of the material sheet, the resistance is controlled by a magnetic field, the power of an electromagnet is changed to improve or reduce the viscosity of the magnetorheological fluid, the rotation of a rotating shaft is limited by the magnetorheological fluid to generate load resistance to the movement of one end of the material sheet, and the resistance is adjusted at will, so that the anti-fatigue detection in various load strengths is carried out.
3. According to the invention, the constant temperature heater structure is carried on the surface of the detection machine base, and the detection material sheet is heated by radiation heating through the constant temperature heater so as to be heated, so that the fracture performance of the pyrolytic carbon of the carbon-carbon composite material under different temperature environments can be measured, the diversity of detection data can be increased, and the detection result can more truly reflect the use effect of the material.
Drawings
FIG. 1 is a schematic overall structure of an embodiment of the present invention;
FIG. 2 is a schematic diagram of a transducer connection configuration in accordance with an embodiment of the present invention;
fig. 3 is a schematic view of a load varistor mounting structure according to an embodiment of the present invention;
FIG. 4 is a cross-sectional structural view of a transducer connection structure in accordance with an embodiment of the present invention;
fig. 5 is an exploded view of a load varistor in accordance with an embodiment of the present invention;
FIG. 6 is a schematic view of a static guide and a moving pin configuration according to an embodiment of the present invention;
FIG. 7 is a schematic diagram of a reciprocating guide plate and transducer disk configuration in accordance with an embodiment of the present invention.
Reference numerals:
100. detecting the engine base; 110. a control terminal; 120. a drive motor; 130. a drive end mount; 140. a load end mount; 131. an input shaft; 141. a driven shaft;
200. a transduction connection structure; 210. a static guide plate; 220. a moving guide plate; 230. a motion shaft pin; 240. a spline coupler; 250. a reciprocating guide plate; 260. a transduction disk; 211. sliding the guide pin; 212. a spring; 213. a first offset; 221. a slide base; 231. a first resisting groove; 251. second offsetting; 261. a second resisting groove;
300. a load varistor; 310. a first control end box; 320. a fluid transfer box; 330. a second control end box; 340. an electromagnet; 350. a rotating shaft; 331. an adjusting seat; 351. a resistance paddle board;
400. a constant temperature heater.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings in conjunction with the following detailed description. It should be noted that the embodiments of the present invention and features of the embodiments may be combined with each other without conflict.
The following describes a carbon-carbon composite material fatigue resistance detection device provided by some embodiments of the invention with reference to the accompanying drawings.
Referring to fig. 1 to 7, the anti-fatigue detection device for carbon-carbon composite provided by the invention comprises: the detection device comprises a detection machine base 100, a transduction connecting structure 200, a load rheostat 300 and a constant temperature heater 400 embedded and installed on the surface of the detection machine base 100, wherein a control terminal 110 is fixedly installed on the surface of the detection machine base 100, a driving motor 120, a driving end seat 130 and a load end seat 140 which are positioned on the same horizontal straight line are fixedly installed on the surface of the detection machine base 100, the transduction connecting structure 200 and the load rheostat 300 are respectively installed on the surfaces of the driving end seat 130 and the load end seat 140 in a sliding mode, an input shaft 131 and a driven shaft 141 are respectively sleeved on the surfaces of the driving end seat 130 and the load end seat 140 in a rotating mode, and one end of the input shaft 131 is fixedly connected with the output end of the driving motor 120 through a coupler;
the transduction connection structure 200 comprises a static guide plate 210, a moving guide plate 220, a moving shaft pin 230, a spline coupler 240, a reciprocating guide plate 250 and a transduction disc 260 fixedly sleeved on the surface of the moving shaft pin 230, the moving shaft pin 230 is rotatably sleeved on the inner sides of the static guide plate 210 and the reciprocating guide plate 250, one end of the moving shaft pin 230 is slidably sleeved on the inner side of the spline coupler 240, one end of the spline coupler 240 is fixedly connected with the end part of the driven shaft 141, and the transduction disc 260 is positioned inside the reciprocating guide plate 250; the load varistor 300 includes a first control end box 310, a fluid rotating box 320, a second control end box 330, an electromagnet 340, and a rotating shaft 350 rotatably sleeved inside the first control end box 310 and the fluid rotating box 320, one end of the rotating shaft 350 is fixedly connected with the end of the driven shaft 141, and the other end is fixedly mounted with a plurality of resistance paddles 351 located inside the fluid rotating box 320, the fluid rotating box 320 is filled with a magnetic fluid, and the bottom surface of the second control end box 330 is slidably mounted with an adjusting seat 331 fixed on the surface of the load end seat 140.
In this embodiment, a controller is disposed inside the control terminal 110 and a control panel is disposed on the surface thereof, the input terminals of the driving motor 120, the load resistor 300 and the thermostatic heater 400 are electrically connected to the output terminal of the controller, and the thermostatic heater 400 is a PCT heater structure.
Specifically, the control terminal 110 is used for controlling the power of the driving motor 120, the load rheostat 300 and the constant temperature heater 400, and the constant temperature heater 400 is used for carrying out radiant heating on the detection material sheet to heat the detection material sheet so as to measure the fracture performance of the carbon-carbon composite pyrolytic carbon in different temperature environments, increase the diversity of detection data and enable the detection result to more truly reflect the use effect of the material.
In this embodiment, the input shaft 131, the driven shaft 141, the moving shaft pin 230, the spline coupler 240 and the rotating shaft 350 are located on the same horizontal straight line, and jigs are screwed to one end of the moving shaft pin 230 and one end of the load end socket 140.
Specifically, the material sheet rotation is controlled by the input shaft 131, the driven shaft 141, the moving shaft pin 230, the spline coupler 240 and the rotating shaft 350 which are located on the same axis, and the material sheet is clamped and fixed by jigs at one end of the moving shaft pin 230 and one end of the load end base 140.
In this embodiment, a first abutting groove 231 is formed on one side of the moving shaft pin 230, a plurality of first abutting pins 213 are formed on the inner side of the stationary guide plate 210, one side of each first abutting pin 213 is slidably abutted against the surface of the corresponding first abutting groove 231, the number of the first abutting grooves 231 is several, the first abutting grooves 231 are uniformly distributed on the surface of the moving shaft pin 230 in the circumferential direction, and the adjacent moving shaft pins 230 are connected end to end.
In this embodiment, a plurality of second offsets 251 are disposed inside the reciprocating guide plate 250, a plurality of second offsets 261 corresponding to the second offsets 251 are disposed on the surface of the transducer plate 260, the surface of the second offsets 261 slidably abuts against the surface of the second offsets 251, and the number of the second offsets 261 is different from the number of the first offsets 231.
Specifically, the transducer disc 260 continuously contacts with the second abutting pin 251 inside the reciprocating guide plate 250 under the urging of the spring 212, the shape of the second abutting groove 261 is reflected to be the abutting pushing of the reciprocating guide plate 250 against the transducer disc 260, so that the reciprocating guide plate 250 slides in a reciprocating manner on the surface of the load end seat 140, the spring 212 is linked with the static guide plate 210 to drive the moving shaft pin 230 to slide in a reciprocating manner inside the spline coupler 240, and the first abutting groove 231 and the first abutting pin 213 on the surface of the moving shaft pin 230 are in sliding abutting engagement to enable the moving shaft pin 230 and the static guide plate 210 to move in a reciprocating manner.
In this embodiment, a sliding guide pin 211 slidably fitted over the surface of the reciprocating guide plate 250 is fixedly installed on the surface of the stationary guide plate 210, a spring 212 having the other end abutting against the surface of the reciprocating guide plate 250 is provided on the surface of the stationary guide plate 210, and a slide seat 221 fixed to the surface of the driving end seat 130 is slidably installed on the bottom surface of the moving guide plate 220.
Specifically, the stationary guide plate 210 can move relative to the reciprocating guide plate 250, the spring 212 is linked with the stationary guide plate 210 to drive the moving shaft pin 230 to perform reciprocating sliding motion on the inner side of the spline coupler 240, and the integral motion of the moving guide plate 220 and the stationary guide plate 210 and the relative motion of the moving shaft pin 230 and the stationary guide plate 210 cause one end of the moving shaft pin 230 to drive the material sheet to perform disordered motion.
In this embodiment, the number of the electromagnets 340 is several, the electromagnets 340 are divided into two groups and uniformly arranged inside the first control end box 310 and the second control end box 330, and the first control end box 310 and the second control end box 330 are respectively and fixedly installed on two sides of the fluid rotating box 320.
Specifically, the power of the electromagnet 340 is changed to increase or decrease the viscosity of the magneto-rheological fluid, the rotation of the rotating shaft 350 is limited by the magneto-rheological fluid to generate load resistance for the movement of one end of the material sheet, and the resistance is adjusted at will.
In this embodiment, the outer periphery of the resistance blade 351 is in sliding contact with the inner side of the fluid rotating box 320, and a plurality of evenly distributed overflowing holes are formed in the surface of the resistance blade 351.
Specifically, the magneto-rheological fluid can only pass through the overflowing holes on the surface of the resistance paddle 351 during the rotation of the resistance paddle 351, so that the resistance paddle 351 is subjected to resistance action on the relative movement with the magneto-rheological fluid inside the fluid rotating box 320, and load resistance is provided for the rotation of the driven shaft 141.
The working principle and the using process of the invention are as follows:
when the carbon-carbon composite material anti-fatigue detection equipment is used, firstly, a carbon-carbon composite material sheet with a proper length is selected, the positions of the load rheostat 300 and the driven shaft 141 are adjusted through the adjusting seat 331, clamping and fixing of two ends of the sheet are carried out through the spline coupler 240 and the driven shaft 141 end jig, and the position of the load rheostat 300 is locked after clamping and fixing; the driving motor 120 intermittently drives the input shaft 131 to rotate to drive the spline coupler 240 and the moving shaft pin 230 to synchronously rotate and drive one end of a material sheet to rotate, the other end of the material sheet is connected with the rotating shaft 350 through the driven shaft 141, the rotating shaft 350 rotates, the resistance paddle 351 on the surface of the resistance paddle is moved in the magneto-rheological fluid in the fluid rotating box 320, the magneto-rheological fluid provides the running resistance of the rotating shaft 350, the other end of the material sheet is blocked to rotate and has certain hysteresis under the action of the rotating resistance of the load rheostat 300, and therefore the material sheet is twisted through the rotating speed difference between the moving shaft pin 230 and the driven shaft 141; meanwhile, the surface transduction disc 260 of the moving shaft pin 230 continuously contacts with the second resisting pin 251 in the reciprocating guide plate 250 under the pushing of the spring 212 in the rotation of the spline coupler 240, the shape reaction of the second resisting groove 261 is the abutting pushing of the reciprocating guide plate 250 relative to the transduction disc 260, the reciprocating guide plate 250 slides in a reciprocating manner on the surface of the load end seat 140, the spring 212 is linked with the static guide plate 210 to drive the moving shaft pin 230 to slide in a reciprocating manner on the inner side of the spline coupler 240, the first resisting groove 231 and the first resisting pin 213 on the surface of the moving shaft pin 230 are in sliding abutting connection to enable the moving shaft pin 230 and the static guide plate 210 to move in a reciprocating manner, the material sheet is driven to move in a disorder manner through the integral movement of the moving guide plate 220 and the static guide plate 210 and the relative movement of the moving shaft pin 230, so that the fatigue performance in a real use scene is closer to that the material sheet is heated by radiation heating through the constant temperature heater 400, thereby measuring the carbon pyrolysis breaking performance of carbon-carbon composite materials under different temperature environments, increasing the diversity of the detection data and enabling the use result to be more real reaction material; the structure of the fluid rotating box 320 filled with magnetorheological fluid generates load resistance to the movement of one end of the material sheet, the resistance is controlled by a magnetic field, the viscosity of the magnetorheological fluid is improved or reduced by changing the power of the electromagnet 340, the rotation of the rotating shaft 350 is limited by the magnetorheological fluid to generate load resistance to the movement of one end of the material sheet, and the resistance is adjusted at will, so that the anti-fatigue detection in various load strengths is performed.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the claims and their equivalents.
Claims (8)
1. Carbon-carbon composite material antifatigue check out test set, its characterized in that includes: the detection device comprises a detection machine base (100), an energy conversion connecting structure (200), a load rheostat (300) and a constant temperature heater (400) embedded and installed on the surface of the detection machine base (100), wherein a control terminal (110) is fixedly installed on the surface of the detection machine base (100), a driving motor (120), a driving end seat (130) and a load end seat (140) which are located on the same horizontal straight line are fixedly installed on the surface of the detection machine base (100), the energy conversion connecting structure (200) and the load rheostat (300) are respectively installed on the surfaces of the driving end seat (130) and the load end seat (140) in a sliding mode, an input shaft (131) and a driven shaft (141) are respectively sleeved on the surfaces of the driving end seat (130) and the load end seat (140) in a rotating mode, and one end of the input shaft (131) is fixedly connected with the output end of the driving motor (120) through a coupler;
the transduction connecting structure (200) comprises a static guide plate (210), a moving guide plate (220), a moving shaft pin (230), a spline coupler (240), a reciprocating guide plate (250) and a transduction disc (260) fixedly sleeved on the surface of the moving shaft pin (230), the moving shaft pin (230) is rotatably sleeved on the inner sides of the static guide plate (210) and the reciprocating guide plate (250), one end of the moving shaft pin is slidably sleeved on the inner side of the spline coupler (240), one end of the spline coupler (240) is fixedly connected with the end of a driven shaft (141), and the transduction disc (260) is located inside the reciprocating guide plate (250);
the load rheostat (300) comprises a first control end box (310), a fluid rotating box (320), a second control end box (330), an electromagnet (340) and a rotating shaft (350) which is rotatably sleeved on the first control end box (310) and the fluid rotating box (320), wherein one end of the rotating shaft (350) is fixedly connected with the end of a driven shaft (141) and the other end of the rotating shaft is fixedly provided with a plurality of resistance paddle boards (351) which are positioned on the inner side of the fluid rotating box (320), the fluid rotating box (320) is filled with a magnetic transition fluid, and an adjusting seat (331) fixed on the surface of the load end seat (140) is slidably installed on the bottom surface of the second control end box (330).
2. The carbon-carbon composite material fatigue resistance detection device as claimed in claim 1, wherein a controller is arranged inside the control terminal (110) and a control panel is arranged on the surface of the control terminal, the input ends of the driving motor (120), the load rheostat (300) and the constant temperature heater (400) are electrically connected with the output end of the controller, and the constant temperature heater (400) is of a PCT heater structure.
3. The carbon-carbon composite material fatigue resistance detection device according to claim 1, wherein the input shaft (131), the driven shaft (141), the moving shaft pin (230), the spline coupler (240) and the rotating shaft (350) are located on the same horizontal straight line, and jigs are fixed to one end of the moving shaft pin (230) and one end of the load end seat (140) through threads.
4. The carbon-carbon composite material fatigue resistance detection device according to claim 1, wherein a first abutting groove (231) is formed in one side of the moving shaft pin (230), a plurality of first abutting pins (213) are arranged on the inner side of the stationary guide plate (210), one side of each first abutting pin (213) is in sliding abutting contact with the surface of the corresponding first abutting groove (231), the number of the first abutting grooves (231) is a plurality, the first abutting grooves are uniformly distributed on the surface of the moving shaft pin (230) in the circumferential direction, and the adjacent moving shaft pins (230) are connected end to end.
5. The carbon-carbon composite material fatigue resistance detection device according to claim 1, wherein a plurality of second offsets (251) are arranged on the inner side of the reciprocating guide plate (250), a plurality of second offset grooves (261) corresponding to the second offsets (251) in a one-to-one manner are formed in the surface of the transduction disc (260), the surface of each second offset groove (261) is in sliding abutting contact with the surface of each second offset (251), and the number of the second offset grooves (261) is different from that of the first offset grooves (231).
6. The carbon-carbon composite material fatigue resistance detection device as claimed in claim 1, wherein a sliding guide pin (211) slidably sleeved on the surface of the reciprocating guide plate (250) is fixedly installed on the surface of the stationary guide plate (210), a spring (212) with the other end abutting against the surface of the reciprocating guide plate (250) is arranged on the surface of the stationary guide plate (210), and a sliding seat (221) fixed on the surface of the driving end seat (130) is slidably installed on the bottom surface of the moving guide plate (220).
7. The carbon-carbon composite material fatigue resistance detection device according to claim 1, wherein the number of the electromagnets (340) is several, the electromagnets (340) are divided into two groups and uniformly arranged at the inner sides of the first control end box (310) and the second control end box (330), and the first control end box (310) and the second control end box (330) are respectively and fixedly installed at two sides of the fluid rotating box (320).
8. The carbon-carbon composite material fatigue resistance detection device as claimed in claim 1, wherein the periphery of the resistance paddle plate (351) is in sliding contact with the inner side of the fluid rotating box (320), and a plurality of evenly distributed overflowing holes are formed in the surface of the resistance paddle plate (351).
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| CN107340190A (en) * | 2017-08-24 | 2017-11-10 | 吉林大学 | Multistage quiet Dynamic Coupling mechanical loading unit for high frequency fatigue test |
| CN111855447A (en) * | 2020-07-30 | 2020-10-30 | 四川大学 | Ultrasonic fatigue stress amplifying device with unified sample size |
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