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1646 results about "Fatigue testing" patented technology
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HIGH CYCLE FATIGUE. Historically, high cycle fatigue (LCF) refers to situations that require more than 10 4 cycles to failure where stress is low and deformation is primarily elastic. In high-cycle fatigue situations, materials performance is commonly characterized by an S-N curve, also known as a Wöhler curve .
Acoustic-optical-electric synergistic welding material fatigue performance testing method and system
InactiveCN119246289AEfficient fusionimprove accuracyBiological modelsMaterial strength using repeated/pulsating forcesFeature extractionMulti-task learning
The invention relates to the technical field of welding material performance testing, and discloses an acoustic-optical-electric synergistic welding material fatigue performance testing method and system, and the method comprises the steps: synchronously collecting a first multi-mode signal data set of a welding material in a fatigue testing process; carrying out fusion processing to obtain a fusion feature vector; performing time sequence feature extraction to obtain time sequence comprehensive representation; constructing and training an initial fatigue performance multi-task learning model comprising a shared feature extractor and a task-specific sub-network based on time sequence comprehensive representation; implementing domain adaptation and transfer learning on the fatigue performance multi-task learning model to obtain a target fatigue performance multi-task learning model; acquiring a second multi-mode signal data set in real time and inputting the second multi-mode signal data set into the target fatigue performance multi-task learning model to obtain a welding material fatigue performance test result, so that acoustic, optical and electric multi-mode signals can be effectively integrated, and high-precision, multi-task and migratable welding material performance test is realized.
Owner:深圳市朝日电子材料有限公司
Fatigue test equipment for corrugated pipe in vacuum state
PendingCN119290563ASolve the lack of spaceImprove applicabilityFluid pressure measurementMaterial strength using repeated/pulsating forcesCircular discPressure transmission
The invention discloses corrugated pipe fatigue test equipment in a vacuum state, which comprises a machine body and a moving assembly arranged at the bottom of the machine body, and a hollow pull pipe is arranged on the machine body in a sliding manner. A to-be-tested corrugated pipe is fixed through a flange plate and covered with a transparent cover, a connecting rod and a threaded base are connected and fixed through a nut pipe sleeve, a lower disc and an upper disc are arranged on a guide rod, a fastening nut is rotated, the upper disc is pressed downwards, the upper disc transmits pressure to the lower disc through an elastic piece a, and the transparent cover is fixed; a closed space is formed inside the corrugated pipe, the vacuum pump vacuumizes the inside and the outside of the corrugated pipe through the connecting pipe c and the connecting pipe a, at the moment, the driving unit drives the cam, the corrugated pipe is repeatedly stretched and compressed under the action of the elastic piece b, the fatigue strength of the corrugated pipe is tested in a vacuum state, and the fatigue strength is measured according to the length of the corrugated pipe to be tested. The height of the driving unit is controlled through the electric control telescopic rod, it is guaranteed that the corrugated pipe has enough space for testing, and the applicability is good.
Owner:HEFEI XINBO WELDED BELLOWS CO LTD
Fatigue test method and system for automobile seat cushion framework
ActiveCN119290426AGuaranteed accuracyGuaranteed generalization abilityVehicle testingOptically investigating flaws/contaminationCar seatFatigue loading
The invention relates to the technical field of seat cushion framework detection, in particular to an automobile seat cushion framework fatigue test method and system. The method comprises the following steps: acquiring information data of an automobile seat cushion framework sample; performing skeleton key part screening on the automobile cushion skeleton sample information data to obtain skeleton key part screening data; performing sensor data acquisition on the automobile seat cushion framework sample based on the framework key part screening data to obtain stress sensor acquisition data and deformation sensor acquisition data; and carrying out loading mode design on the information data of the automobile seat cushion framework sample to generate fatigue loading mode data of the automobile seat cushion framework. According to the invention, the accuracy and reliability of the fatigue test of the automobile seat cushion framework are improved by accurately screening key parts of the framework, designing a real loading mode, deeply detecting damage, predicting the service life and optimizing materials.
Owner:SHENZHEN BAIDAI YAXING TECH CO LTD
Virtual fatigue testing
PendingUS20250148167A1Geometric CADDesign optimisation/simulationStress concentrationFatigue testing
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.
Owner:THE BOEING CO
Fatigue resistance test device for automobile sealing strip
ActiveCN222379337UReduce testing costsShorten the test cycleMachine sealing rings testingFatigue testingTest bench
The utility model relates to an automobile sealing strip fatigue resistance test device, the test device is used for carrying out fatigue resistance test on a sealing strip on an automobile window assembly, and the automobile sealing strip fatigue resistance test device comprises a test bench; the fixing mechanism is arranged on the test board and is used for fixing the vehicle window assembly; the pressing and releasing mechanism comprises a driving assembly and a profiling part connected with the driving assembly, the driving assembly can drive the profiling part to repeatedly press the sealing strip, and the profiling part is provided with a profiling face matched with the surface of the sealing strip. According to the fatigue resistance test device for the automobile sealing strip, through cooperative arrangement of the test bench, the fixing mechanism and the pressing and releasing mechanism, the fatigue resistance test can be performed on the sealing strip on the automobile window assembly in a low-cost and high-efficiency manner, and the fatigue resistance test device has relatively good universality and compatibility.
Owner:FUYAO GLASS IND GROUP CO LTD
A large-tonnage axial bidirectional fatigue loading test device for elastic support joints
ActiveCN114964744Breduce frictionimprove accuracyMachine part testingWind energy generationFatigue loadingRubber elasticity
The present invention relates to the technical field of fatigue testing of rubber elastic elements, specifically to a large-tonnage radial-axial bidirectional fatigue loading test device for elastic support joints, comprising a radial loading component, an axial loading component, a fixed component and a loading platform, wherein the fixed component is placed above the loading platform, the radial loading component applies a radial loading force to the elastic support joint in the fixed component from the bottom of the loading platform upward, the axial loading component applies an axial loading force perpendicular to the radial loading force to the elastic support joint in the fixed component from the upper side of the loading platform, and the power output rod of the axial loading component and the radial loading component are in a linkage state of the same upper and lower. The present invention can perform fatigue loading tests on elastic support joints in radial and axial directions at the same time, with a large loading load, and can meet the large-tonnage loading requirements of fan equipment.
Owner:ZHUZHOU TIMES NEW MATERIAL TECHNOLOGY CO LTD +1
Carbon fiber unidirectional resin composite board bending fatigue test device and method
PendingCN119164804AMaterial strength using steady bending forcesMaterial strength using repeated/pulsating forcesFiberComposite plate
The invention discloses a carbon fiber one-way resin composite board bending fatigue test device and method, the carbon fiber one-way resin composite board bending fatigue test device comprises a seat plate, two end portion limiting assemblies and a carbon fiber composite sample plate, and a lifting extrusion platform is arranged at the top of the seat plate and located between the two end portion limiting assemblies. According to the bending fatigue test device and method for the carbon fiber one-way resin composite plate, through the arrangement of the seat plate, the end limiting assembly, the lifting extrusion platform and the two upper extrusion rods, after the two ends of a carbon fiber composite sample plate are limited, the two upper extrusion rods can be used for achieving a multi-point bending extrusion test on the carbon fiber composite sample plate; and by matching with the arrangement of the bottom extrusion assembly and the linkage assembly, the lower part of the carbon fiber composite sample plate can be extruded when the upper part of the carbon fiber composite sample plate is extruded, so that the multi-point bending fatigue test of the carbon fiber composite sample plate is more comprehensively realized.
Owner:INNER MONGOLIA HONGCHANG NEW MATERIALS CO LTD
Coupling torsional fatigue testing machine
ActiveCN119643338Alock firmlystable structureMachine part testingMaterial strength using repeated/pulsating forcesTorsion fatigueCoupling
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.
Owner:NINGBO SHENGYU TRANSMISSION TECH CO LTD
Fatigue test device and test method for multi-axis high-low-cycle composite heat engine
PendingCN120102110AMachine part testingMaterial strength using tensile/compressive forcesFatigue testingMechanism (engineering)
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.
Owner:BEIJING UNIV OF TECH
Wind power blade biaxial fatigue testing device and testing method
ActiveCN119223566AReduce capacity requirementsavoid power lossMachine part testingVibration testingElectric machineryFatigue testing
The invention relates to the technical field of axial fatigue testing, and particularly discloses a wind power blade biaxial fatigue testing device and a testing method.The wind power blade biaxial fatigue testing device comprises a base and a blade body, the root of the blade body is installed on a test bed base, and a clamp is arranged on the side wall of the blade body; a traction assembly used for adjusting the vibration frequency of the clamp is arranged at the top end of the base, the clamp comprises two transverse plates, the two transverse plates are located on the two sides of the blade body respectively, second clamping blocks are arranged on the opposite sides of the two transverse plates, and four second double-end studs are arranged between the two transverse plates in a penetrating mode. According to the invention, the blades are loaded in a resonance form through the cable, the additional power loss of an inertia mass block is avoided, the requirement on the capacity of the motor is reduced, the cable is uniformly wound and unwound, the knotting and abrasion of the cable are effectively avoided, the service life of the cable is prolonged, and a switchable single-shaft and double-shaft fatigue test structure is provided.
Owner:SHANGHAI ZHONGFRAME ROBOT CONTROL TECH DEV CO LTD
Full-size pipeline fatigue test method, device, equipment and medium
The invention discloses a full-size pipeline fatigue test method, device, equipment and medium, and relates to the field of materials and engineering.The full-size pipeline fatigue test method comprises the steps that defect prefabrication is conducted on a preset full-size pipeline to obtain a to-be-detected pipeline, and the 3D scanning technology is used for scanning the pipeline surface of the pipeline to obtain feature data corresponding to defects on the pipeline surface; a periodic load is applied to the pipeline through a preset internal pressure loading system, and meanwhile, the pipeline surface of the pipeline is monitored in real time based on the characteristic data by using a preset digital data image correlation method so as to determine the current surface strain condition of the pipeline; whether the pipeline enters a fatigue failure state or not is judged based on the current surface strain condition, and if the pipeline enters the fatigue failure state, the fatigue life of the pipeline is determined based on the number of load cycles. Therefore, the strain state of the to-be-detected pipeline is monitored in real time, and the fatigue life of the to-be-detected pipeline is evaluated.
Owner:CHINA UNIV OF PETROLEUM (BEIJING)
Lateral vibration and axial superposition fatigue test method
ActiveCN119198399Aavoid breakingSustainable transportationMaterial strength using repeated/pulsating forcesClassical mechanicsFatigue testing
Owner:SHANGHAI AERONAUTICAL MATERIAL STRUCTURE TESTING CO LTD
Fatigue test equipment and method for implant and abutment
PendingCN120702891AWeather/light/corrosion resistanceMaterial strength using repeated/pulsating forcesMechanical engineeringDental implant
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.
Owner:DONGGUAN DENOYA MEDICAL INSTR CO LTD
Fatigue test method for cabin structural member of offshore wind power generator
PendingCN121632819AWeather/light/corrosion resistanceMaterial strength using repeated/pulsating forcesSensor arrayMarine engineering
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.
Owner:NANTONG YUNDING PRECISION METAL MFG CO LTD
Method for detecting fatigue performance of asphalt pavement
InactiveCN119437950Aimprove accuracyMaterial strength using repeated/pulsating forcesRoad engineeringArchitectural engineering
The invention belongs to the technical field of road engineering, and particularly relates to a method for detecting the fatigue performance of an asphalt pavement, which comprises the following steps: firstly, manufacturing a composite small beam for detection: manufacturing a water-stable layer by using a concrete material; then a blocking agent is applied to the top face of the water-stable layer, so that bonding between the asphalt surface layer and the water-stable layer is blocked, the effect that interlayer thorough disengaging and bonding failure are achieved, and interlayer damage is simulated; paving an asphalt surface layer on the top surface of the cement-stabilized layer and compacting to form a test composite board, and cutting the test composite board to form a composite small beam; and putting the composite small beam into a fatigue testing machine, and repeating the loading times to obtain the fatigue life of the composite small beam. According to the scheme, a method for researching the influence of the interlayer state on the fatigue performance of the asphalt pavement is provided, and corresponding rationalized suggestions and theoretical bases can be provided for design and construction of the asphalt pavement based on the analysis; according to the method, the interlayer damage of the actual asphalt pavement is simulated, so that the detection accuracy is very high.
Owner:CHINA MCC22 GROUP CORP LTD +1
Testing machine phase difference optimization method and system and rubber product fatigue testing machine
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.
Owner:武汉捷沃汽车零部件有限公司
Fretting fatigue testing device and method in atmosphere environment
PendingCN121431257AMaterial strength using repeated/pulsating forcesAtmospheric sciencesFatigue testing
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.
Owner:NANJING TECH UNIV
Switch spring fatigue fault degree testing device and method
ActiveCN119574353Achange arcComprehensive test dataMachine part testingMaterial strength using repeated/pulsating forcesTop driveGear wheel
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.
Owner:江苏安弘电气有限公司
Two-degree-of-freedom clamp capable of adjusting bending moment and direction of turbine blade and test method
ActiveCN120831277AGas-turbine engine testingLighting and heating apparatusTurbine bladeClassical mechanics
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.
Owner:AECC HUNAN AVIATION POWERPLANT RES INST
Fatigue test method for energy storage spring and special auxiliary device
PendingCN120213430AMachine part testingCircuit interrupters testingClassical mechanicsFatigue testing
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.
Owner:STATE GRID HUBEI ELECTRIC POWER RES INST +1
Method and device for testing fatigue crack growth rate of metal material based on temperature gradient change
PendingCN120651657AThermometers using electric/magnetic elementsMaterial strength using tensile/compressive forcesCrazingMetallic materials
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.
Owner:UNIV OF SCI & TECH BEIJING
Integrated fatigue small crack initiation in-situ monitoring device and detection method
InactiveCN119394766ASimple structureeasy to operateMaterial analysis using acoustic emission techniquesNuclear energy generationAcoustic emissionEngineering
The invention discloses an integrated fatigue small crack initiation in-situ monitoring device and a detection method, and belongs to the technical field of material mechanical property testing. Comprising a fatigue test system, a digital image correlation test system and an acoustic emission test system, the fatigue test system is used for detecting the fatigue performance of a sample under loading force in situ and comprises a console and an in-situ fatigue testing machine, and two tensile fixtures are symmetrically arranged on the in-situ fatigue testing machine; the digital image correlation test system is used for in-situ detection of time and space trajectories of crack initiation and expansion under fatigue of a sample, and comprises a camera, a bracket and an image acquisition card; the acoustic emission test system is used for in-situ detection of an accumulation process of internal damage of a sample under fatigue, and comprises an acoustic emission sensor, a preamplifier and an acoustic emission acquisition card. By simultaneously capturing and recording the mechanical response, the optical image and the acoustic emission signal of the sample in the fatigue test period, real-time in-situ monitoring of multi-source information such as mechanical, optical and acoustic emission is realized.
Owner:XI AN JIAOTONG UNIV
Fatigue test method, system and equipment based on texture change of carbon fiber and medium
PendingCN120507208AMaterial strength using repeated/pulsating forcesPattern recognitionFatigue loading
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.
Owner:NAVAL AVIATION UNIV
Device for bending-torsion coupling fatigue test
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.
Owner:LANZHOU UNIVERSITY OF TECHNOLOGY
Plate-shaped sample clamp for stress corrosion 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.
Owner:CHENGDU ADVANCED METAL MATERIALS IND TECH RES INST CO LTD
Shoelace buckle fatigue tester and testing method thereof
PendingCN119086036ARealize quality inspectionSolve the durability problemMachine part testingMaterial strength using repeated/pulsating forcesShoe lacesFatigue testing
Owner:GTTC TECH DEV CO LTD +2
Fretting fatigue test device
PendingCN119269222Aevenly loadedImprove engineering applicabilityMaterial strength using repeated/pulsating forcesMachineFatigue testing
The invention provides a fretting fatigue test device, and belongs to the technical field of test devices. The device comprises a fatigue testing machine for providing a circulating axial load, a transverse load loading mechanism for providing a transverse load required by a test, and a loading test bench for providing a test platform for the transverse load loading mechanism. According to the invention, the constructed structure device is combined with the fatigue testing machine, the fretting fatigue test is carried out on the common fatigue testing machine, the centering position precision of the fretting pad and the sample is ensured through the designed loading test bed and the transverse load loading mechanism, the fretting pad can apply the same transverse load on the two sides of the sample, and the accuracy of the fretting fatigue test is ensured. According to the fretting fatigue testing device, the problems of uneven transverse load stress and the like in the fretting fatigue testing process are solved, the fretting fatigue testing accuracy is improved, the offset amplitude can be continuously applied, the influence of actual complex working conditions on parts can be better simulated, and the engineering applicability of the test is improved.
Owner:NCS TESTING TECHNOLOGY CO LTD +1
Multipurpose high-frequency fatigue testing machine
ActiveCN120927487AMaterial strength using repeated/pulsating forcesMechanical engineeringFatigue testing
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.
Owner:LIAONING ZHONGKE LILE TESTING TECH SERVICE CO LTD
Metal material low-temperature fracture toughness testing device for fatigue testing machine
PendingCN119198404Areduce dosagereduce internal volumeNuclear energy generationMaterial strength using repeated/pulsating forcesUpper jointMetallic materials
The invention discloses a metal material low-temperature fracture toughness testing device for a fatigue testing machine, relates to the technical field of material mechanical property testing, and solves the problem that room-temperature and low-temperature material testing cannot be performed on the same testing device. The device comprises a test barrel, an inner container, an extensometer, an upper joint and a lower joint, wherein the inner container is arranged in the test barrel; the extensometer is in contact with the sample and returns a real-time mechanical signal; the upper end of the upper connector is connected with a hydraulic chuck above the fatigue testing machine, and the lower end of the lower connector penetrates through the inner container and the testing barrel to be connected with a hydraulic chuck below the fatigue testing machine; the upper joint and the lower joint are opposite to each other and are used for clamping a sample; a sealing structure is arranged between the lower connector and the inner container. According to the invention, a testing machine does not need to be transformed, testing conditions for samples with different sizes are obtained by replacing different accessories, and meanwhile, a testing clamp can be replaced to test the mechanical properties of materials under different environmental conditions.
Owner:HARBIN INSTITUTE OF TECHNOLOGY (SHENZHEN) (INSTITUTE OF SCIENCE AND TECHNOLOGY INNOVATION HARBIN INSTITUTE OF TECHNOLOGY SHENZHEN)
Fatigue life prediction method and related device
ActiveCN119227471Aimprove accuracySustainable transportationDesign optimisation/simulationcomputer scienceFatigue testing
The invention provides a fatigue life prediction method and a related device, and relates to the technical field of composite material mechanics and experimental mechanics. The method comprises the steps of determining fatigue test parameters, performing fatigue test operation on a target composite material by utilizing the fatigue test parameters to obtain time-frequency scale diagrams of the target composite material under different fatigue times, and performing fatigue life prediction operation according to the fatigue test parameters and the time-frequency scale diagrams under the different fatigue times. And obtaining the fatigue life of the target composite material. According to the method, the fatigue life test is realized, the time-frequency scale maps of the target composite material under different fatigue times are used, and the data can represent the use condition data of the target composite material in an actual scene, so that the fatigue life prediction accuracy can be improved by using the data to predict the fatigue life.
Owner:AVIC BEIJING INST OF AERONAUTICAL MATERIALS