988 results about "Fatigue testing" patented technology

The invention relates to a driver fatigue detection method based on face video analysis, belonging to the field of vehicle active safety and mode recognition. The method comprises the steps of: carrying out face detection on a face image to be detected for primarily positioning local organs, such as eyes, nose and mouth; further obtaining face characteristic points positioned accurately; and finally, on the basis of an accurate positioning result of multiple frames of face characteristic points to be detected, carrying out quantization description on a face motion characteristic, and obtaining the result of fatigue detection on a driver to be detected according to a face motion statistical indicator. The driver fatigue detection method has high reliability, has no special requirements on hardware, does not involve complex operation, and has good instantaneity so as to be applied in real time in practice. The driver fatigue detection method has better robustness on the aspects of eyeglasses wearing, face angles, nonuniform illumination and the like, and can be suitable for various types of vehicles for reminding a driver of being in a fatigue state so that traffic accidents are avoided.

The invention relates to a material mechanical property in-situ testing system and method in a dynamic and static load spectrum, and belongs to the field of mechanical tests. The system integrates the following functions: a static testing function of biaxial drawing and shearing in an orthogonal plane, a shearing static testing function, a double shaft pull-pull mode fatigue testing function, and a static/dynamic press testing function. A complicated static/dynamic load spectrum can be established. Multi-mode composite load mechanical property evaluation can be performed on a film material or a block material, for example: high-cycle fatigue tests based on double-shaft pre-stretching load and impact press tests based on double-shaft stretching-shearing pre-load. At the same time, special defects are pre-fabricated on the central area and cross shaped arm area of a test piece; the analysis functions of a variable-zoom optical imaging system or a digital speckle strain analysis system can be utilized; the provided system and method can also be used to research the deformation behavior and cracking expansion rules of micro defects in a component under a multi-dimensional stress, and an evaluation tool is provided for performance degradation rules of products and optimized preparation method of materials.

The invention relates to a steel wire fretting fatigue testing machine and a method. The testing machine mainly comprises a horizontal loading device, an axial clamping device and an axial tensile compression device, wherein the horizontal loading device consists of a concave horizontal support saddle, a guiding support saddle, a wedged slide block, a loading steel wire, a pressure sensor, a loading rod and a locking nut; the axial clamping device consists of a spoke-type tensile compression sensor, a threaded rod connected with the spoke-type tensile compression sensor and an upper holding block fixed on the threaded rod; and the axial tensile compression device consists of an oil cylinder, a threaded rod connected with the piston of the oil cylinder and a lower holding block fixed on the threaded rod. The steel wire fretting fatigue testing machine has the advantages that by exerting horizontal set load on an axial steel wire through the horizontal loading device and by acting axial fatigue stress on a steel wire sample through the axial clamping device and the axial tensile compression device, the testing machine realizes fretting fatigue test of the coaction of fretting wear and axial fatigue stress of the steel wire sample; dynamic adjustment of the concave horizontal support saddle ensures that an axial fatigue steel wire does not generate bending stress; moreover, fluctuation ranges of both amplitude and frequency are wide and easy to control and measure by utilizing computer program.

The invention discloses a full-automatic high-pressure container gas circular charging and discharging fatigue test system which not only can realize the full-automatic control of the high-pressure gas circular charging and discharging fatigue test but also can carry out the on-line automatic detection to the fatigue condition of the high-pressure container. The automatic control of the circular charging and discharging is realized through the dynamic response signals of a temperature sensor arranged inside the tested container, the dynamic response signals of each pressure sensor on the high-pressure pipelines and switching of solenoid valves controlled by the control strategy. The gas medium in the circular charging and discharging process can be recycled after the pressurizing by a pressure-releasing receiving tank and a gas compressor so as to avoid the gas waste and environment contamination. The dynamic fatigue states of the high-pressure container in the circular charging and discharging process are acquired through the changing of response signals of a hydrogen sensor arranged in a sealed bin of the tested container and the response signals of a strain sensor stuck to the surface of the tested container; and when the released hydrogen concentration reaches the set value or the strain of the container material exceeds the set value in the charging and discharging process, the fatigue test system is closed automatically.

The invention relates to an online material biaxial static-dynamic performance test platform under service temperature, belonging to the field of precision drive. The large-stroke biaxial synchronous identical-speed or synchronous different-speed displacement output is realized by virtue of four groups of piezoelectric actuators which are orthogonally distributed, and the biaxial static tensile test or dynamic fatigue test for a block-shaped material or a film material with a characteristic size being in a millimeter scale can be carried out under a high/low temperature service condition by combining with an embedded high temperature electrothermal alloy sheet/parr patch. The online material biaxial static-dynamic performance test platform is likely to use in conjunction with a scanning electron microscope with a relatively-large vacuum cavity or other microimaging device with an open-type carrier space, such as an optical microscope, an atomic power microscope and a high speed camera, so that the multimode biaxial static tensile test or the large-frequency-range biaxial dynamic fatigue test can be carried out, and the research for the microstructure evolution behavior and fatigue failure mechanism of various structural materials or functional materials under a complicated service condition such as a high/low temperature condition and a static-dynamic plane stress condition can be facilitated.

The present invention is directed to the fabrication of a test apparatus and the test apparatus itself. The test apparatus is designed to be a component used in a durability/fatigue testing unit.

The invention discloses a test method for the fatigue damage and the service life of a horizontal axis wind turbine blade, aiming to obtain a more exact blade fatigue performance parameter by adopting a test detection and computational analysis means having low cost and high efficiency so as to meet the requirements of blade design, research and development and detection. The method is characterized in that on the basis of the characteristic that the impeller speed of a horizontal axis wind turbine is lower, and the period change frequency of various fatigue loads is also lower, a series of steps of carrying out static loading testing on the wind turbine blade to obtain a stress/strain amplitude distribution condition under the effect of various fatigue loads and analyzing by combining a material property curve and a cumulative damage theory are adopted to realize the evaluation to the blade fatigue performance. Compared with the traditional horizontal axis wind turbine blade fatigue testing technology, the method has the advantages of short period, low cost, capability of obtaining a final service life parameter of the blade, and the like.

A method of simulating life of a rotor blade mounting feature mounted in a complementary rotor disc mounting feature comprises the steps of providing two specimen mounting features (37) each having portions defining pressure faces matching in profile respective faces of the rotor blade mounting feature; providing a fixture (38) having two opposed mounting features (39) each having portions defining pressure faces (78) matching in profile respective faces of the rotor disc mounting feature; mounting the specimen mounting features (37) in the fixture mounting features (39); applying a first load to the specimen mounting features (37); measuring a strain in a region (86) of the fixture (38) between the fixture mounting features (39); applying a second load to the fixture (38), the second load being substantially perpendicular to the first load; and controlling the second load in response to the measured strain. A high cycle load may simultaneously be applied to the specimen mounting features (37). Claims are also included for an apparatus (10) for carrying out the method.

The invention discloses a device for testing composite asphalt pavement interlayer shear fatigue, and a method thereof. According to the present invention, a skew shearing experiment is adopted to determine the composite asphalt pavement interlayer shear fatigue lives under different temperature conditions. The device comprises a loading bar, a load testing system, a pressing block, a supporting block and a support platform, wherein the pressing block and the supporting block are provided with a concave part, when the loading rod loads, a specimen requiring test is positioned in a space formed by docking of the two concave parts. The testing method is: placing the specimen in the supporting block and the pressing block, loading on the specimen through a testing machine to generate the skew shearing failure to obtain the maximum failure load, and carrying out the shear fatigue experiment under the repeated load effect according to 0.2-0.8 times the maximum failure load. The device and the method are simple and easy to operate, the actual stress state of the composite asphalt pavement can be accurately simulated, and the important significances are provided for the designs and the evaluations of the composite asphalt pavement interlayer shear property and the interlayer structure and material, and the design of the asphalt layer thickness.

The invention relates to a material micro-mechanical property biaxial tension-fatigue test system and a test method thereof, and belongs to the field of precise scientific instruments. The test method is characterized in that orthogonal tensile load is applied to a test piece to make two mutually vertical tensions exist in one plane, and fatigue load can also be applied to the test piece on the basis of the tensile load in order to research the micro-mechanical properties of a material under different load forms and load sizes. The system is composed of a precise loading-transmitting unit, a fatigue unit, a mechanics and deformation signal detection unit, and a test piece clamping unit. The test system has the advantages of novel and compact structure, respective realization of uniaxial tension test, biaxial tension test, uniaxial tension-fatigue test and biaxial tension-fatigue test, good compatibility with an optical microscope, and dynamic research of the relationship between the microstructure of the material and the deformation damage mechanism under tension-fatigue load conditions.

A high-temperature creep fatigue test system, which consists of a fatigue testing machine, specimen holders, a high temperature furnace, a sample, a high temperature extensometer, a cooler and host computer. Upper and lower specimen holders are in threaded connection to ensure the uniform axial loading of the specimen; the specimen holders are connected to the fatigue testing machine; the high-temperature extensometer is connected with the specimen through a jaw; a high temperature furnace mounted on the fatigue testing machine moves to a corresponding position, and wraps the specimen inside; the cooler through inlet and outlet pipes is respectively connected to the upper and lower specimen holders; the fatigue testing machine and the high-temperature extensometer are connected to the host computer; the host computer by reading real-time measurement strain of the high-temperature extensometer controls the fatigue testing machine, so as to conduct strain-controlled high-temperature creep fatigue test. The present invention has the beneficial effects that deformation of the material in high-temperature creep fatigue test can be measured, and has the characteristics of easy operation and high measurement accuracy.

The present invention discloses a fatigue test device for a vehicle body thin plate, and a test method thereof, and belongs to the field of material fatigue test. The test device comprises: a centering apparatus and an anti-bending constraining apparatus. The centering apparatus comprises a vertical column and two centering clamping blocks, wherein the vertical column is provided with a reference plane correspondingly attaching to holding fixtures so as to make a center line of a fatigue specimen parallel to the reference plane, and the two centering clamping blocks are intervally and vertically arranged on the reference plane of the vertical column, such that the fatigue specimen is centered to a center line of test fixtures. The test method comprises: selecting a thin plate fatigue specimen and measuring a static tension curve; carrying out calibration on test force, selecting the initial test force, and setting a condition fatigue limit of the material; adopting the fatigue test device to carry out centering and anti-bending constraining on the fatigue specimen, and adopting a testing machine to carry out a fatigue test on the fatigue specimen. According to the present invention, uniformity of the test process is ensured and influence on the tested result due to additional factors is reduced by the centering apparatus and the anti-bending constraining apparatus, the test efficiency is improved, and the test cost is saved.

The invention belongs to a fatigue life determining technology for an operating system of an aircraft and relates to a fatigue test method for a full-aircraft main operating system of the aircraft. According to the fatigue test method, the fatigue coordination loading of an operating load and an operating displacement can be carried out, a fatigue test including the operating load and an operating displacement spectrum on the full-aircraft main operating system of the aircraft can be implemented, and meanwhile, the problem of simultaneous test of aircraft body fatigue on the same fatigue testing machine is taken into account, so that the fatigue properties of components and supporting parts of the full-aircraft main operating system and static performance indicators of the full-aircraft main operating system are all actually assessed; the actual loaded conditions of the main operating system of the aircraft under normal operating and emergency operating conditions are more truly reflected, the fatigue properties of the structure and mechanism of the main operating system of the aircraft are embodied; and the test cost is reduced, and the reliability of a test result is improved.

The invention relates to a ship-shaped switch fatigue test device which is used for testing a ship-shaped switch comprising two press ends. The ship-shaped switch fatigue test device comprises a working platform, a bracket, a first drive device and a second drive device, wherein the working platform is used for fixing the ship-shaped switch; the bracket is fixed on the working platform, and a press column for pressing the ship-shaped switch is arranged on the bracket; the first drive device is used for driving the press column to move up and down so as to press the ship-shaped switch; and thesecond drive device is used for driving the press column to horizontally move above the ship-shaped switch. The ship-shaped switch fatigue test device can carry out a fatigue test on a plurality of ship-shaped switches simultaneously and improves the test efficiency, the force and the frequency for pressing the ship-shaped switch each time keep consistent, and the test effect is better.

The invention discloses a fatigue testing machine of a ball socket bearing of a main rotor of a helicopter. The fatigue testing machine is characterized in that a first rolling guide (26) and a second rolling guide (29) are fixedly connected to a central upright post (16); a first supporting sleeve(25) is fixedly connected on the first rolling guide (26); a second supporting sleeve (30) is fixedly connected to the second rolling guide (29); both the first supporting sleeve (25) and the second supporting sleeve (30) support a main shaft of a rotor wing (3); an inner hole of an inner ring (24) of the ball socket bearing of an auto bank unit of a main rotor is matched with an outer cylindrical surface of the main shaft of the rotor wing(3); the inner ring (24) of the ball socket bearing of the auto bank unit of the main rotor is sheathed with an outer ring thereof to form a spherical pair. The invention can accurately simulate the real working conditions of the ball socket bearing of the auto bank unit of the main rotor, such as the temperature, the load, and the like, and accurately simulate the real movements of the ball socket bearing of the auto bank unit of the main rotor, such as the speed, the acceleration and the like. The invention has the advantages of compact structure, beautiful appearance and convenient operation and maintenance.

The invention discloses a clamping device for pipe-flat plate line contact fretting wear experiments. In the clamping device, a cylindrical pipe clamping assembly and a flat plate clamping assembly are arranged to stably clamp experimental samples i.e., a cylindrical pipe and a flat plate respectively; a cylindrical pipe pressing assembly and a flat plate pressing assembly are arranged to respectively provide pressing forces along horizontal opposite directions for the cylindrical pipe and the flat plate, and therefore, the flat plate and the cylindrical pipe are in line contact and bear stable and uniform normal load and the pipe-flat plate line contact fretting wear experiments can be carried out in cooperation with a uniaxial fatigue testing machine. The clamping device is simple in structure, convenient for operation, capable of carrying out the experiments in cooperation with the conventional uniaxial fatigue testing machine, has no need for introducing a biaxial fretting wear testing machine, thereby reducing the experimental cost.

The invention provides spring fatigue testing equipment applied to the field of testing, and also relates to a testing method of the equipment. A bracket (23) of the spring fatigue testing equipment has a reverse T-shaped structure; a cam disk (1) is arranged on a transmission shaft (2); the side face of the cam disk (1) is provided with a slide block type slot (5); a locking block (12) is fixed to a side edge of the bracket (23); a rocker shaft (10) passes through a big hole (34) and a circular hole (36); another rocker shaft (14) passes through a small hole (35); a small end (8) of the rocker shaft is propped against the locking block (12); one end of the rocker shaft (14) opposite to the small end (8) of the rocker shaft is connected with a slide block (20); the slide block (20) is embedded in the slot (5); the transmission shaft (2) is connected with a motor (24); and the motor (24) is connected with a control switch (28). The invention realizes high-efficiency testing of the spring fatigue equipment, greatly reduces the required power output and also realizes unmanned operation.

The invention relates to a fatigue resistance testing device for a rubber membrane. A reciprocating transmission mechanism adopts a double-eccenter connecting rod type structure and is positioned on the top of the device; the top end of a reciprocating rod is connected with a counter; the reciprocating transmission mechanism is in driving communication with a motor arranged on the right top of the device; the bottom end of the reciprocating rod is in mechanical connection with a membrane clamping mechanism; the bottom of the center of the clamping mechanism is provided with a balancing spring; the right end of the membrane clamping mechanism is communicated with an air pressure pump through a valve; the middle part of an air inlet pipe is connected in series with an air pressure sensor and an air pressure meter; the middle part of the reciprocating rod is provided with a fixing piece; the upper part and the lower part of the reciprocating rod are provided with a sliding sleeve respectively; and the sliding sleeve restricts the moving direction of the reciprocating rod. The fatigue resistance testing device has the advantages of simple structural principle, large testing range, high efficiency, convenient operation and use, safe and reliable operation and good automation degree.

The invention relates to a flexural fatigue mode adjustable tester for testing mechanical properties of materials, and a testing method thereof, belonging to the field of precision instruments. The tester comprises a flexural fatigue loading unit, a test piece clamping unit, an associated movement unit and a precise detection unit, wherein the flexural fatigue loading unit is powered by a direct current servo motor, a crank and rocker mechanism is driven to realize reciprocating swinging of a rocker by primary worm gear reduction, the rocker drives the clamping unit to realize reciprocating rotation, a bended test sample is repeatedly bent along with the reciprocating rotation of the clamping unit, and the associated movement unit does associated rotation and translation under the driving of the bended test sample. The tester has the advantages that the error of converting bending moment in three-point bending loading is avoided, the influence of the friction force of a support roller on the testing result is avoided, the bending moment and the bending angle can be accurately measured, different fatigue modes can be realized, and fatigue testing with different stress amplitudes and different average stresses can be realized.

The invention discloses a system for predicting the fatigue limit of a magnesium alloy member based on infrared thermal imaging, and a method thereof. The system comprises: fatigue tester jigs (1); a fatigue test piece (2) comprising a magnesium alloy base material and a welded joint test piece; a fatigue test control system (3); a fatigue test system (4) used for the fatigue test of the magnesium alloy base material and the welded joint test piece to obtain a magnesium alloy fatigue limit under a cycle frequency of 10<7 >; an infrared temperature measurement system (8) for obtaining the surface temperature change curve of the fatigue test piece (2) in the fatigue test process and recording the temperature change data of the fatigue test piece (2) in the fatigue process; and a comprehensive analysis system (5) applying origin software to compare the obtained magnesium alloy fatigue limit with a fatigue limit obtained through routine fatigue tests in order to judge the measurement accuracy. The system and the method can be used for estimating the dangerous point and the fatigue limit of a welding structure in service.

The invention discloses a fatigue life test method of metallic film on a flexible substrate, which comprises processing fatigue test under integral circulation stress load on a metallic film/flexible substrate system with better interface combination, recording the stress-strain curvature and resistance change-circulation frequency curvature of the metallic film, detecting the metallic film microcosmic structure under different circulation frequencies in the fatigue process to obtain a metallic film surface damage topography-resistance change-circulation frequency curvature. The invention uses the sharp increase of resistance change on the resistance change-circulation frequency curvature to represent metallic film damage and define a fatigue life Nf. The strain amplitude delta epsilon and relative fatigue life Nf obtained from the stress-strain curvature forms the metallic film fatigue property failure evaluation of the metallic film/flexible substrate system. The inventive method has simple test, accurate measurement and prior property.

The invention discloses a device for testing a phase change memory unit. The device comprises a signal generator, a measuring module, a conversion connection interface, a probe station, a controller, a unit array interface circuit and a digital oscilloscope, wherein a control signal is applied through the controller; an excitation signal is applied through the signal generator; and direct current I-V characteristics, pulse I-V characteristics, threshold voltage, threshold current, the minimum write pulse amplitude, the minimum write pulse width, the minimum erasing pulse amplitude, the minimum erasing pulse width, data retention time, erasing fatigue testing and other electrical characteristics of the phase change memory unit are tested by acquiring signals through the measuring module or the oscilloscope. By the device, the direct current I-V characteristics, the pulse I-V characteristics, the threshold voltage, the threshold current, amorphous resistance, crystalline resistance, the minimum write pulse amplitude, the minimum write pulse width, the minimum erasing pulse amplitude, the minimum erasing pulse width, the data retention time, the erasing fatigue testing and other electrical characteristics of the phase change memory unit can be accurately measured.

The invention relates to an elastic backing board for vibration absorption for railway tracks and a manufacturing method of the elastic backing board. The elastic backing board comprises the following raw materials by weight: 100 parts of silicone rubber, 25 to 70 parts of reinforcing agent, 1 to 6 parts of structure control agent, and 0.5 to 3 parts of vulcanizing agent. According to the invention, the silicone rubber with excellent elasticity is adopted as the main material, and the rubber backing board with an excellent fatigue property and lower static rigidity is prepared through the processing technologies of mixing, vulcanization forming and the like. The elastic backing board provided by the invention has the properties as follows: 1, high elasticity and low static rigidity; 2, excellent fatigue property (the elastic backing board passes 30,0000 times of fatigue testing according to the regulation of tentative technical specifications for fastener systems on passenger special lines); and 3, favorable oil resistance, weatherability, aging resistance, insulating property and shock-absorbing and cushioning effects, and improvement on the riding comfort and safety of high-speed trains.

The present invention is directed to the fabrication of a test apparatus and the test apparatus itself. The test apparatus is designed to be a component used in a durability/fatigue testing unit. One such test apparatus made in accordance with the present invention is a life-size model of an Abdominal Aortic Aneurysm made with any rapid prototyping process that creates solid freeform parts with flexible material. A preferred rapid prototyping process used to make the AAA model in accordance with the present invention is the process known as selective laser sintering (SLS), while the preferred material used in said process is an elastomeric polymer.

A high-frequency fatigue testing machine dynamic load error compensation method includes the following steps: 1) establishing a three-freedom-degree vibration mechanical model having the system with damping, and analyzing relevant factors affecting a dynamic load error; 2) determining a key factor affecting the dynamic load error; 3) making a pasted strain piece of a middle section of a calibration rod into a calibration sensor, and calculating the stiffness by using a finite element method; 4) taking a calibration sensor with known stiffness, fixing the upper end to a testing machine, allowing the lower end to press a standard force sensor, applying a static load, and calibrating by the standard force sensor; 5) calculating the difference between the amplitude of the calibration sensor and the amplitude of the force measuring sensor, and recording the corresponding calibration sensor stiffness; 6) changing the calibration sensors with different stiffness, repeating the step 4) and the step 5), and thus obtaining a relation curve of the error and the sensor stiffness; and 7) carrying out error compensation on a corresponding dynamic load measurement value by the calculated error value. The measuring accuracy of the fatigue testing machine dynamic load is effectively improved.

The invention discloses a spring fatigue test device, which is used for testing the fatigue strength of a spring (9) to be tested, and comprises a clamp bottom plate (1), a lower positioning plate (3), an upper pressure plate (5) and spring positioning pins (4) for fixing the spring (9) to be tested. The spring (9) to be tested is sleeved on the spring positioning pins (4); and the spring positioning pins (4) are in clearance fit with the mounting holes on a lower positioning plate (3). When the technical scheme is adopted, the clamping is reliable, the spring to be tested can be changed conveniently, the device is suitable for fatigue tests of springs of different specifications, and can replace the conventional manual operation method, improve test efficiency and reduce production cost.

The invention relates to the technical field of a high-pressure fatigue test, and particularly relates to a complete high-pressure fatigue testing device and method in which the highest testing pressure is 70MPa. According to the high-pressure fatigue testing complete device and method provided by the invention, a large-flow high-pressure piston pump is used for directly pressurizing a test piece; after the value of a pressure reaches a set test pressure value, the pressure is kept for a certain period; a double-position three-way electromagnetic valve is switched to control an air cylinder to reset; an unloading valve is automatically reset to be switched on for unloading; when the value of the pressure reaches a lower limit pressure value, the pressure is kept for the certain period, and the pressure is increased again. With the adoption of the high-pressure fatigue test device and method provided by the invention, a pressure cycling processing of pressure increasing, pressure maintaining, pressure decreasing and pressure keeping can be completed, so that the cycle of stress when a high-pressure container or pipe piece is forced in work can be simulated; the one-time cycle is performed, and the test time is added by one until a set cycle time is reached or a test container is cracked, so as to effectively test whether the fatigue service life and the limit of the test piece can meet using requirements or not. The device has the advantages of being simple in system, high in reliability, good in simulation effect and the like.

The invention discloses a method for testing bursting pressure of a bursting sheet which is characterized in that the tested bursting sheet is subjected to pressure test and fatigue test lower than the expected bursting pressure through a pipeline and a device arranged on the pipeline by using compressed air as power. The method has the advantages of filling the technical blank and providing technical support for normal, quick and accurate bursting sheet inspection. The method has the prominent advantages of high automation degree, convenient operation and the like, and has foreseeable huge economic value and social value.

The invention provides a driver fatigue driving detection system based on machine vision and a detection method, and belongs to the technical field of machine vision and machine learning. The system belongs to a non-intrusive type detection system. When detection is performed, needed information is acquired through a camera, normal driving of a driver is not influenced, and equipment is low in price and small in size; and a Bluetooth camera only needs to be installed in a vehicle, and app software is installed in a mobile phone, and then fatigue detection for the drive can be achieved. Information acquisition of the system is convenient and easy; when the system is used, only the camera is externally added, and then the system can adapt to any-type vehicle and any road condition; and the system has a consistent fatigue judgment criteria and the high fatigue judgment accuracy rate. The system integrates fatigue characteristics of eyes, a mouth and a face, the accuracy rate of fatigue judgments in complex driving environment is improved, and system parameters are rapidly updated through combination with the machine learning according to feedback of the driver so that the system adapts to different characteristics of different drivers. The system has the advantages of short training time, the rapid computing speed and high real-time performance.

The invention discloses a testing device and a testing method for the fretting fatigue of an end-tooth structure. The testing device comprises a concave tooth fixing assembly, a convex tooth clamping assembly and a normal force loading assembly, wherein the concave tooth fixing assembly is used for realizing the fixation of a concave tooth test piece; the convex tooth clamping assembly is used for realizing the loading of a convex tooth test piece; the normal force loading assembly is used for realizing the application of a load in a horizontal direction; a fretting fatigue testing level loading device adopts a symmetrical structure layout and the load is realized by a hydraulic loading system; the hydraulic loading system adopts a closed force system framework structure and has no output of external force, and the load of a fatigue tester in the vertical direction is not influenced; and a concave tooth test piece bears a pre-tightening force load in the horizontal direction and is tightly pressed by a concave tooth pressing plate in the vertical direction, so that the loading direction in the horizontal direction of a loading process keeps unchanged. According to the testing device, a common single-shaft fatigue tester is matched by similarly simulating the stress condition of end teeth under an actual working environment, so that a fretting fatigue test of an end-tooth structure simulating piece can be carried out and the experiment cost is reduced.