1255 results about "Fatigue testing" patented technology

A method for virtual fatigue testing includes reading a coarse-grid finite-element-model of a component from one or more libraries with a computer, and identifying static stress locations neighboring at least one of fasteners and non-fastener stress concentration regions in the component by a static analysis of a component intermediate-grid finite-element-model of the component, identifying hot spot locations in the component intermediate-grid finite-element-model by performing a fatigue screening on the component, generating details for the component intermediate-grid finite-element-model based on the hot spot locations, and predicting crack results by a deterministic durability-and-damage-tolerance analysis of the details for a component fine-grid finite-element-model of the component, calculating a crack margins for the component fine-grid finite-element-model by a probabilistic durability-and-damage-tolerance analysis of the crack results, and generating an output file that contains the final crack initiation margin and the final crack growth margin.

The invention relates to the technical field of coupler detection, in particular to a coupler torsional fatigue testing machine which comprises a base, a fixed column, a movable column and a torsion driving mechanism, the fixed column is fixedly installed on one side of the base, and the movable column is assembled on the other side of the base in a sliding mode along the Y axis and fixed through multiple sets of radial displacement adjusting pieces; a first mandrel connecting part is rotatably arranged at the top of the fixed column, a second mandrel connecting part is fixedly arranged at the top of the movable column, the central axes of the first mandrel connecting part and the second mandrel connecting part are arranged in the X-axis direction, and the two ends of a to-be-tested coupler are detachably assembled on a first mandrel and a second mandrel through tensioning connecting parts respectively; the torsion driving mechanism is installed on the base. The torsional fatigue testing machine for the coupler can firmly lock the diaphragm coupler with a complex structure, is enough to specially detect the torsional fatigue strength of the diaphragm coupler, and is relatively high in detection efficiency.

The invention discloses a multi-axis high-low-cycle composite heat engine fatigue test device and a test method, and relates to the technical field of fatigue test.A clamping swing mechanism and a high-cycle loading mechanism in the device are located on two planes perpendicular to each other, a low-cycle load acts on a test piece through a fatigue testing machine, and a high-cycle load acts on the test piece; the high-cycle load acts on the clamping swing mechanism through the high-cycle loading mechanism, so that high-cycle loading and low-cycle loading of different paths are achieved, and multi-axis loading of the vibration load is achieved due to the asymmetry of the clamping swing mechanism. According to the fatigue test device and test method for the multi-axis high-low-cycle composite heat engine, the real load environment of a blade material is considered, engineering practice is fitted, and a basis is provided for life evaluation.

The invention discloses a fatigue testing device and method for an implant and an abutment, and belongs to the field of dental implant testing. Fatigue test equipment for an implant and an abutment comprises a test box, piston boxes are fixedly connected to the two sides of the top of the test box, an arc-shaped plate is fixedly connected between the piston boxes on the two sides, the fatigue test equipment further comprises a detection seat, the detection seat is installed on the top of the arc-shaped plate, and a positioning groove is formed in the detection seat; according to the invention, the swing arm rod drives the detection seat to swing back and forth, and the impact plate, the piston plate, the first spring and the second spring are arranged to generate various horizontal and vertical acting forces on the combination of the implant and the abutment, so that various different chewing actions and force changes are effectively simulated, the test is closer to the actual situation, and the test efficiency is improved. Therefore, the fatigue performance of the combination of the implant and the abutment in a long-time use period can be evaluated, and the representativeness and the accuracy of a fatigue test result are effectively improved.

The invention discloses a fatigue test method for a cabin structural member of an offshore wind power generator. A test piece is subjected to surface treatment, a multi-sensor array is arranged, the test piece is placed in a combined system of a multi-axis dynamic loading unit and a collaborative environment simulation cabin, an intelligent control and analysis platform synchronously applies a multi-axis alternating load, salt spray corrosion and a circulating temperature and humidity environment, and real marine service conditions are simulated; the state of a test piece is evaluated in real time based on criteria such as a strain concentration coefficient and acoustic emission energy, a strengthening test is started for potential damage risks, a load strategy is adjusted to track crack propagation when microcracks are monitored, and after the test is ended, a fatigue life prediction model is established or calibrated by combining failure test piece analysis data. And outputting a life evaluation result and a structure improvement suggestion. Through the multi-factor collaborative simulation and self-adaptive control technology, the authenticity and efficiency of the test are improved, and technical support is provided for design optimization and reliability guarantee of offshore wind power cabin structural parts.

The invention belongs to the technical field of fatigue testing, and discloses a testing machine phase difference optimization method and system and a rubber product fatigue testing machine. The method comprises the steps of presetting a loading path signal, collecting sensor data, and performing feature extraction on the sensor data to obtain phase difference features; taking the parameters of the test piece and the phase difference characteristics as input of a dual-channel lightweight model, and obtaining a phase difference predicted value of each channel; based on a multi-target dynamic parameter optimization algorithm, control parameters of the test machine are optimized and adjusted in combination with the phase difference predicted value and the inter-channel coupling characteristics; the strain distribution of the test piece is monitored in real time, and when the strain unevenness is larger than a preset strain threshold value, channel load redistribution is triggered, and the phase difference is optimized again; according to the invention, test piece characteristics and loading path changes can be sensed in real time, the phase difference prediction error is reduced, the test efficiency is improved, the energy consumption is reduced, and the authenticity of multi-axis load simulation, the phase control precision and the comprehensive performance of the system are remarkably improved.

The invention provides a fretting fatigue testing device and method in an atmosphere environment, and relates to the technical field of material performance testing in a complex environment, and the device comprises an upper clamp, a lower clamp and a sealing cavity; the upper clamp and the lower clamp are respectively fixed in an upper chuck and a lower chuck of the first load loading mechanism; the sealing cavity is used for providing a sealed service atmosphere environment for a fatigue specimen and comprises two flange end covers and a tubular connecting piece, the two flange end covers are respectively connected with the upper clamp and the lower clamp in a sealing manner; the two ends of the tubular connecting piece are in sealing connection with the upper end cover and the lower end cover respectively, and sealing connection of at least one end is of a detachable structure. The device can realize accurate simulation and steady state maintenance of service gas, is suitable for multiple scenes such as dry / wet air, inertia, oxygen / hydrogen enrichment and corrosive gas, and overcomes the limitation that traditional atmospheric environment test data cannot be used for real life prediction.

The invention relates to the field of spring fatigue testing equipment, in particular to a switch spring fatigue fault degree testing device and method.The switch spring fatigue fault degree testing device comprises a spring fatigue testing device body, the spring fatigue testing device body comprises a bottom bin, and a servo motor is arranged in the bottom bin and installed in an installation base; the servo motor is installed on one side of the middle in the bottom bin, the top driving end of the servo motor is fixedly connected with a driving gear, one side of the driving gear is in meshed connection with a gear ring, the gear ring is fixedly connected to the lower portion of the periphery of a rotating sleeve, and the rotating sleeve is fixedly connected to the middle of the bottom end of a connecting disc. According to the invention, the top arc at the tail end of the sliding rod can drive the elastic plate to deform synchronously, so that the radian of the elastic plate can be changed, people can test fatigue data of the switch spring main body under different compression coefficients, and the test data can be more comprehensive.

The invention discloses a two-degree-of-freedom clamp capable of adjusting the bending moment and direction of a turbine blade and a test method. The two-degree-of-freedom clamp comprises a blade clamping component, an upper adjustable U-shaped head, a lower adjustable U-shaped head, an upper clamping rod and a lower clamping rod. The blade clamping component is in threaded connection with the upper adjustable U-shaped head and the lower adjustable U-shaped head, the other end of the upper adjustable U-shaped head and the other end of the lower adjustable U-shaped head are connected with the upper clamping rod and the lower clamping rod respectively, and the other end of the upper clamping rod and the other end of the lower clamping rod are connected with an upper clamping head and a lower clamping head of the fatigue testing machine respectively. The upper clamping rod and the upper adjustable U-shaped head are adjustably connected in pairs in the transverse direction intersecting with the vertical axis so as to adjust the eccentricity of the turbine blade load. The eccentric angle of the blade load can be adjusted by adjusting the rotation cycle of the blade clamping component. According to the clamp disclosed by the invention, by adjusting the eccentricity and the eccentricity angle during a turbine blade test, different bending moment directions and relative sizes of different sections during the turbine blade test can be realized, so that the aim of simulating a real load is fulfilled.

The invention relates to a fatigue test device and method for an energy storage spring, and the method comprises the following steps: 1, taking the energy storage spring in a to-be-tested high-voltage circuit breaker, measuring the parameters of the energy storage spring, and carrying out the preliminary machining; 2, the energy storage spring obtained after primary machining is installed on a fatigue test device; 3, statically and statically loading the energy storage spring to the compression height H1 on the fatigue test device; 4, initial stress measurement and fatigue test of the energy storage spring are carried out, and test data are obtained; and 5, processing the obtained experimental data to obtain an experimental result. The method comprises the following steps: firstly, performing two-stage compression on a spring to H1 by performing staged static loading, then adjusting the compressed spring and a compression device to a starting point of a maximum compression stroke of a fatigue testing machine, and reserving enough compression displacement space for large-stroke compression fatigue.

The invention discloses a method and device for testing the fatigue crack growth rate of a metal material based on temperature gradient change, and relates to the technical field of metal material detection. Mounting a constant low-temperature component and a constant high-temperature component close to two ends of the sample respectively; pasting a plurality of thermocouples on the middle surface of the sample; a magnetic powder dynamic moving assembly is installed on the surface of the sample, and a constant-temperature state is given to magnetic powder; loading a bidirectional tension-compression fatigue testing machine along the through hole of the sample; a thermal imager is arranged far away from the parallel sample, and a thermal imaging image is shot; according to the data, the fatigue crack growth rate of the sample at the corresponding temperature is obtained; according to the method, the fatigue crack growth rate of the metal material can be rapidly tested, meanwhile, the temperature gradient is formed in the sample, the influence of the temperature on the crack growth rate can be obtained in different temperature areas, the device required by the whole test is simple in structure, low in cost and convenient to load and disassemble, and the whole efficiency of the test is effectively improved.

The invention provides a fatigue test method, system and equipment based on texture change of carbon fibers and a medium, and belongs to the technical field of material tests.The method comprises the steps that a carbon fiber composite material is selected as a test sample; applying a fatigue load to the test sample according to a designed test condition, and collecting a surface image of the test sample; the method comprises the following steps of: preprocessing an acquired image, clustering according to the gray level and texture similarity of pixels to obtain a plurality of clustering subareas, and marking different clustering areas by using different colors to complete color mapping; extracting texture feature parameters from the image after color mapping, and performing PCA dimension reduction to obtain key texture feature parameters; and comparing the key texture feature parameters of the image under different test conditions, identifying texture feature changes, and completing fatigue performance evaluation. According to the method, image processing and texture feature analysis are combined, so that non-destructive testing of the CFRP fatigue performance is realized, and the testing accuracy and efficiency are improved.

The invention discloses a device for a bending-torsion coupling fatigue test. The device comprises a frame, a test piece end fixing mechanism and a test piece force applying mechanism. Wherein the frame forms a square frame body structure. The test piece end fixing mechanism is mounted on the inner side of the frame and used for clamping one end of the test piece. The test piece force application mechanism and the test piece end fixing mechanism are transversely arranged in the frame at an interval, and the test piece force application mechanism comprises a lifting mechanism fixed on two opposite inner walls of the frame, a bending and twisting force application mechanism connected with the lifting mechanism, and a twisting force application driving mechanism in transmission fit with the bending and twisting force application mechanism and connected to the frame; the bending and twisting force applying mechanism and the test piece end fixing mechanism are transversely and oppositely arranged and are used for clamping and fixing the other end of the test piece. Under the condition that a traditional uniaxial fatigue testing machine is not modified, the upper and lower uniaxial loads of the fatigue testing machine can be converted into the bending-torsion multi-axial combined load of the test piece, accurate bending-torsion torques can be obtained, and effective data support is provided for a fatigue test.

The utility model provides a platy sample fixture for stress corrosion fatigue test, which comprises an upper chuck, a lower chuck, a corrosion container and a plurality of locking bolts, the upper end of the upper chuck is provided with a fatigue testing machine fixing part, and the lower end of the upper chuck is provided with a platy sample slot with a downward opening; an upper threaded hole communicated with the plate-shaped sample inserting groove is formed in the side wall of the upper chuck, the locking bolt is in threaded connection with the upper threaded hole, the plate-shaped sample inserting groove with an upward opening is formed in the upper end of the lower chuck, a lower chuck connecting hole is formed in the bottom of the corrosion container, and the lower chuck connecting hole is in threaded connection with the outer side wall of the lower chuck. And a lower threaded hole communicated with the plate-shaped sample slot is formed in the side wall of the lower chuck. By adopting the high-strength corrosion-resistant alloy and the acrylic solution pool, the plate-shaped sample clamp for the stress corrosion fatigue test has excellent corrosion resistance and mechanical strength, the stability of a sample in a corrosive medium is ensured, so that the accuracy and the reliability of a test result are improved, meanwhile, a lower chuck connecting hole is in threaded connection with the outer side wall of the lower chuck, and the stability of the test result is improved. And the corrosive liquid is prevented from leaking.

The invention belongs to the technical field of testing equipment, and particularly relates to a multipurpose high-frequency fatigue testing machine which comprises main control equipment and a fatigue testing machine body, the fatigue testing machine body comprises a bottom machine and an electromagnetic high-frequency generating machine body, and a balance weight table is assembled under the electromagnetic high-frequency generating machine body through connecting rod connection; clamp assemblies are assembled on the surface of the bottom machine and the lower surface of the counterweight table; the multiple balance weights are adjustably stacked on the surface of the balance weight table and used for being matched with the resonance points by replacing balance weights; and the plate clamp is detachably assembled with the clamp assembly and is used for detecting cracks generated in the test process of the test sample. The device can replace manpower to flexibly adjust the counterweight, realizes rapid and convenient operation, can timely detect a cracked plate in a test, and is convenient to timely stop the test before the sample is fractured.

The invention relates to a bending-torsion coupling transmission shaft fatigue test device and method, and relates to the technical field of test equipment. Comprising a test bench, a bending loading device arranged at one end of the test bench, a torque loading device arranged at the other end of the test bench, and a test piece bearing device arranged between the bending loading device and the torque loading device, the test piece bearing device comprises a guide rail which is arranged on the test bed and extends from the bending loading device to the torque loading device, a positioning seat which is in sliding connection with the guide rail, and a bearing plate which is arranged on the positioning seat and can be lifted, so that a simulation test of a coupling effect can be carried out on bending and torsion of a transmission shaft, and the test piece bearing device can also be used for bearing the transmission shaft. And the bending test can be carried out under the condition that the transmission shaft is supported at a specific position.

The invention discloses asphalt pavement material fatigue test equipment based on pressure change, and relates to the technical field of fatigue test. Comprising a bearing assembly used for being assembled with a pressure applying assembly and a vehicle body running outside an asphalt pavement; and the pressure applying assembly is mounted at the bottom of the outer side of the bearing assembly and is used for carrying out a fatigue test of pressure change on the asphalt pavement material. According to the device, pressure is applied discontinuously in the testing process, an intermittent pressurizing mode is adopted, the situation that the testing result is affected by the over-elastic effect generated by continuous pressing of the asphalt pavement is effectively avoided, and in addition, through intermittent matching between a contact structure and a threaded lead screw structure, the testing result is more accurate. The asphalt pavement material can obtain a short recovery period after test pressurization, the recovery period is closer to the stress state in actual use, the damage to the asphalt pavement in the test process is reduced to a certain extent, and the consumed service life of the asphalt pavement material due to test is shortened.

The present application relates to the field of fatigue testing, and in particular to a method and device for thermal fatigue assessment of safety hook rigging based on artificial intelligence; the method comprises: obtaining current monitoring data of the hook rigging to be assessed; obtaining a thermal fatigue prediction result of the hook rigging to be assessed through a thermal fatigue prediction model according to the current monitoring data; wherein the thermal fatigue prediction model is obtained by training with historical monitoring data and fatigue test data on sample hook rigging; the historical monitoring data is the state data of the sample hook rigging during actual use; the fatigue test data is the state data obtained by fatigue testing the sample hook rigging; the thermal fatigue prediction result indicates the degree of thermal fatigue of the hook rigging to be assessed; the present application can solve the technical problem existing in the prior art of lacking a method for determining the thermal fatigue state of the hook rigging.

A fatigue performance test device and method. When being used for testing the tensile fatigue performance of a rubber material, the test device comprises loading frames (1), a pressing mechanism, and gaskets (3), and when being used for testing the shear fatigue performance of the rubber material, the test device comprises loading frames (1) and a pressing mechanism. During testing, the loading frames (1) are fixed by means of positioning panels (6), and after samples (5) are mounted in place, the positioning panels (6) are removed, and a fatigue testing machine is used to load the two loading frames (1), so as to test the tensile fatigue performance or the shear fatigue performance. A plurality of samples (5) can be mounted at the same time for testing the fatigue performance, and mutual influence is avoided, so that the test efficiency is effectively improved, the test cost is reduced, and the test cycle is shortened.

To provide a vibration unit for thin plate bending fatigue test and a thin plate bending fatigue test device that allow fine adjustment of a frequency and enable high-accuracy testing.SOLUTION: A vibration unit for thin plate bending fatigue test comprises a track-shaped drive coil 2, a magnet 3a, a magnet 3b, a drive arm 4, a specimen holder 5, a drive coil tray 6, a bearing 7, a yoke 8a and a yoke 8b. The track-shaped drive coil 2, the drive coil tray 6 as a holding part, the magnet 3a and the magnet 3b constitute the drive part. The bearing 7 constitutes a rotation part, and the drive arm 4 and the specimen holder 5 constitute the arm part. The bearing 7 comprises a pivot bearing 70 and a boss 71. One end of the bearing 7 is connected to one end of the drive arm 4 using a fastener 9c, and to the other end of the drive arm 4 the specimen holder 5 is attached with a fastener 9d. The other end of the bearing 7 is connected to the drive coil tray 6 using a fastener 9b. The track-shaped drive coil 2 is fixed to the drive coil tray 6.SELECTED DRAWING: Figure 2

The invention discloses a pressure switch fatigue test system and method based on data analysis, and relates to the field of switch pressure test. The method comprises the following steps: S1, constructing an instantaneous pressure regulation factor based on a preset target pressure value and a current pressure deviation, and superposing external disturbance compensation to generate a real-time pressure signal; s2, based on the real-time pressure signal, an analog current signal is generated through nonlinear coupling, the dynamic proportion of the pressure to the current change rate is synchronously adjusted, and the corrected current change rate is output; s3, comparing the real-time pressure signal with a preset pressure threshold value, judging the on-off state of the switch, and performing cumulative statistics on the on-off times of the switch; s4, based on the real-time pressure and current signals, fatigue damage is dynamically evaluated through a stress-strain feedback model, and the switch fatigue degree is calculated in an accumulated mode to generate an accumulated fatigue damage strength index. Through fusion of dynamic regulation and control, current synchronization and a damage integration mechanism, working conditions are accurately simulated, nonlinear damage is quantified, and test authenticity and life reliability are improved.

The invention provides a metal plate bending fatigue testing device, and relates to the technical field of bending fatigue testing assistion.The metal plate bending fatigue testing device comprises a portal frame, a testing device support, a testing pressure applying assembly and two bearing assemblies, and the testing pressure applying assembly comprises a hydraulic push rod, a T-shaped plate, a rotating air cylinder, an adjustable pressure applying piece and a roller assembly; the two bearing assemblies each comprise a supporting round rod, a transverse rod base and a vertical plate base, two round rollers are arranged between the two supporting round rods, and ratchet wheel assemblies are arranged at the two ends of the two round rollers; according to the technical scheme, a T-shaped plate is controlled by a hydraulic push rod to drive an adjustable pressure applying piece and a roller assembly to move towards the bottom, and a rotary air cylinder drives the adjustable pressure applying piece to drive the roller assembly to rotate, so that a sample plate is supported by a supporting round rod and a round roller, and the roller assembly applies pressure when rolling at the center of the top of the sample plate; the effect of expanding the bending angle of the sample plate is achieved, and the basic requirement for simulating the working state is provided for data acquisition in the subsequent sample plate fatigue test.

The utility model discloses a fatigue testing machine for an automobile tire steel cord. The fatigue testing machine comprises a rack, and a controller, a front winding clamp, a middle winding clamp, a rear winding clamp, a motor eccentric wheel mechanism, a force application mechanism and a broken wire sensing device which are arranged on the rack, the front winding clamp, the middle winding clamp and the rear winding clamp are used for clamping and fixing a to-be-tested steel cord; the motor eccentric wheel mechanism can drive the middle winding clamp to move left and right in a reciprocating mode, and the motor eccentric wheel mechanism is electrically connected to the controller; the force applying mechanism is used for applying gravity to the steel cord to be tested; the broken wire sensing device is used for judging whether the to-be-detected steel cord is broken or not in the detection process; the broken wire sensing device is electrically connected to the controller; a motor eccentric wheel mechanism is matched to drive the middle winding clamp to reciprocate left and right to simulate repeated bending of the steel wire; therefore, repeated bending tests can be carried out on the steel cords with different specifications under the condition that the steel cords bear the tensile force.

The automobile part torsional fatigue test bench comprises a bench body, a driving mechanism is arranged at one end of the top surface of the bench body, a workpiece carrying structure is arranged at the other end of the top surface of the bench body, a force application structure is arranged at the position, close to the driving mechanism, of the top surface of the bench body, and the driving mechanism comprises a driving bin. The end, away from the force application structure, of the driving bin is fixedly connected with a servo motor, and the two sides of the middle of the interior of the driving bin are fixedly provided with a cycloidal-pin wheel speed reduction assembly and a planetary speed reduction assembly correspondingly. The driving mechanism is driven by the servo motor, a huge oil supply hydraulic system does not need to be used, the occupied area is small, the output torsion load can be switched through the cycloidal-pin wheel speed reduction assembly or the planetary speed reduction assembly, the load output through the planetary speed reduction assembly is low, constant loads can be repeatedly applied to a workpiece for a long time, and the working efficiency is improved. The output load of the cycloidal-pin wheel speed reduction assembly is high, destructive testing of the maximum load can be carried out, and two detection modes can be considered.

The invention relates to a synchronous loading and self-adaptive compensation system for a fatigue test and a working method thereof.The synchronous loading and self-adaptive compensation system for the fatigue test is characterized in that the synchronous loading and self-adaptive compensation system comprises a T-shaped beam capable of being connected with a fatigue testing machine, the two lower side portions of the T-shaped beam are connected with pentagonal steel plates respectively, and the pentagonal steel plates are connected with the T-shaped beam. A plurality of groups of loading units are mounted between the two pentagonal steel plates, each loading unit comprises a hard shell and a rotating disc rotationally connected with the hard shell, a driving mechanism for driving the rotating disc to swing and rotate is arranged on the hard shell, a spherical hinge is fixedly mounted on the rotating disc, and the rotating disc is fixedly connected with the driving mechanism. The lower part of the spherical hinge is connected with an electric telescopic rod which can be electrically controlled to stretch out and draw back, and the lower end of the electric telescopic rod is provided with a loading block acting on the test piece; the problems of'void impact 'and'loading eccentricity' are fundamentally solved, and efficient, accurate and safe multi-test-piece synchronous fatigue test is realized.

The invention relates to the technical field of fatigue testing, and discloses a blade multi-degree-of-freedom traction loading device and a fatigue testing method.The blade multi-degree-of-freedom traction loading device comprises a rail supporting structure, a blade base structure, a blade clamp and a multi-direction loading assembly, and the blade base structure bears and fixes the root of a tested blade; the blade clamp is fixed with the blade; the multidirectional loading assembly comprises a track and at least one traction actuator, and the track is fixed on the track supporting structure; the traction actuator is arranged on the track, and the traction actuator is configured to be capable of moving along the track; the traction actuator comprises a track displacement driving mechanism and a traction mechanism; the traction actuator is configured to move on the track through the track displacement driving mechanism; the traction mechanism is connected with the blade clamp, and the traction mechanism is configured to apply an adjustable traction force to the to-be-tested blade. The traction direction is adjusted by pulling the actuator to move to different positions along the track, and different traction forces are applied in cooperation with the traction mechanism, so that multiple loading modes are realized.

The utility model discloses a transmission shaft torsional fatigue testing machine, which relates to the technical field of transmission shaft testing and comprises a workbench, a torsion component arranged on one side of the top surface of the workbench, a slide rail component arranged on the other side of the top surface of the workbench, and an angle adjusting mechanism arranged on the top surface of the slide rail component. A supporting component is arranged between the sliding rail assembly and the angle adjusting mechanism, the supporting component is arranged on the top face of the workbench, and a protection assembly is arranged above the workbench. In the using process of the device, the transmission shaft can be stably clamped, and accurate torsion testing can be achieved; the structure of the testing machine is optimized, and stability and reliability are improved; wear-resistant materials and structural reinforcement design are adopted, vulnerable parts are reduced, the service life is prolonged, a comprehensive and reliable basic database can be established through a fatigue life test, analysis design reliability is provided, development time is shortened, development cost is reduced, and the problems of product life reliability and bearing capacity are solved.

The utility model relates to the technical field of shock absorption performance testing, and discloses a motorcycle shock absorber performance testing device which comprises a fatigue testing machine and a transmission assembly. Structural components such as the fatigue testing machine are arranged, the fatigue life and reliability of the motorcycle shock absorber are tested through the fatigue testing machine, the transmission assembly drives the connecting rod to test the motorcycle shock absorber, the motorcycle shock absorber is fixed through the mounting assembly, and the position of the bottom mounting assembly is adjusted through the adjusting assembly. According to the motorcycle shock absorber fatigue testing device, the position of the push column is adjusted through a plurality of threaded holes, so that the stretching length of the motorcycle shock absorber is adjusted, the rotating disc is prevented from inclining in the rotating process through the connecting ring, and the effect of conveniently carrying out fatigue testing on the motorcycle shock absorbers with different lengths is achieved; the problem that the accuracy of a test result is influenced by the temperature rise of hydraulic oil when the motorcycle shock absorber is driven by a hydraulic column to be stretched repeatedly is solved.

The invention relates to the technical field of fatigue detection, and discloses a microcomputer-controlled fatigue test device which comprises a workbench, a turntable and a limiting mechanism are installed on the workbench, the turntable is driven to rotate, the limiting mechanism is fixedly connected to the workbench and located in a hole in the center of the turntable, and a swing mechanism is installed on the turntable. The swing mechanism is installed at the eccentric position of the rotating disc, a first installation block capable of swinging is arranged on the swing mechanism, the first installation block extends to the position over the limiting mechanism, one end of a cable to be detected is installed on the first installation block, and the other end of the cable to be detected is installed on the limiting mechanism; through cooperation of the swing mechanism and the rotating disc, the cable is initially vertically arranged, and the swing mechanism and the rotating disc can drive the vertically arranged cable to carry out torsion test, bending test and bending and torsion superposition test, so that the detection of the cable can better fit the use environment of the cable; and the accuracy of data testing is improved.

The invention belongs to the field of mechanical testing equipment, and particularly relates to a bicycle pedal assembly crank dynamic fatigue testing device which comprises a base, the base is a bearing carrier of the testing device, and supports are symmetrically and fixedly connected to the two sides of the base; the device further comprises a mounting block fixedly connected to the top of the support, motors are fixedly mounted on the mounting block, output shafts of the motors on the two sides face the opposite sides and are fixedly connected with mounting shafts, and driving discs are assembled at the ends of the mounting shafts. The two shaft arms of the bicycle crank are clamped and rotated through the driving disc driven by the motor, the dynamic motion state in the actual riding process can be simulated, the resistance generated by parts such as a chain to the crank is simulated through cooperation with the magnetic field effect between the electromagnetic block and the magnetic resistance piece, the resistance can be adjusted by changing the power-on strength of the electromagnetic block, and the stability of the bicycle crank is improved. Therefore, different conditions in actual use can be simulated more accurately.