130results about "Material strength using steady shearing forces" patented technology

This invention discloses a temperature-compensated seepage-shear coupling true triaxial testing apparatus and control method. The apparatus includes a pressure chamber, a shear box, a temperature control system, a pressure application system, and a temperature-displacement corrector. The shear box is housed within the pressure chamber. The temperature control system includes a heat transfer jacket, multi-point thermometers, and a temperature controller. The heat transfer jacket is fitted over the shear box, and the multi-point thermometers are located within the cavity. The pressure application system includes a confining pressure loading device, a pressure head, and a pressure controller. The confining pressure loading device injects a confining pressure medium into the pressure chamber, and the pressure head applies a force to the shear box. The temperature-displacement corrector is electrically connected to the temperature control system and the pressure application system. This apparatus features a temperature control system to precisely regulate the temperature during the test, thereby simulating deep environments at different temperatures. Furthermore, the temperature-displacement corrector dynamically corrects the force applied by the pressure application system, reducing additional forces caused by thermal expansion or contraction and improving stress control accuracy.

The present application relates to the field of rock mechanics property testing, and discloses a test device for rock shear creep impact disturbance loading. The device comprises a control box, an air compressor, a fixed plate, a pressure sensor, a fixed base, an air cylinder, a speed regulating throttle valve, an anti-rotation rod, an anti-rotation plate and a ram. The control box is connected with the pressure sensor and the air compressor through wires; the loading end of the pressure sensor is connected with the fixed base, and the base is installed on the fixed plate; the rear end cover of the air cylinder is connected with the fixed base, and the piston rod end is connected with the ram; the lower part of the ram is provided with an anti-rotation rod connecting lug, and the anti-rotation rod is fixed with the anti-rotation plate through the connecting lug. The air compressor is connected with the speed regulating throttle valve, the ram reciprocating motion is controlled by adjusting air pressure through the control box, and shear impact disturbance loading is realized. The present application can simulate real disturbance working conditions such as blasting and earthquake, has intelligent regulation and control functions of disturbance frequency and load, and is suitable for rock shear creep impact disturbance test.

The present application relates to the technical field of tire performance detection, and particularly relates to a tire tread rubber ground adhesion performance evaluation method and system based on a wet-state epoxy floor master curve. Under a wet-state epoxy floor test interface, dynamic mechanical tests of multiple temperatures and multiple frequencies are performed on a tread rubber sample to obtain viscoelastic response data, a reference temperature is selected, and the data is horizontally translated based on a time-temperature equivalence principle to construct a tan delta master curve with a clear energy dissipation peak value characteristic. In the master curve, a peak value is identified and parameters such as peak value equivalent frequency, peak value tan delta and peak width are extracted, and based on this, the ground adhesion performance of different tread rubbers under the working conditions of a wet-state smooth floor such as an underground garage is quantitatively or semi-quantitatively evaluated. The method integrates wideband response, avoids the contingency of a single point index, improves repeatability and comparability, and is suitable for formula screening and performance comparison.

This invention provides a method and apparatus for testing the mechanical properties of bolted composite materials in a single shear test, relating to the field of material testing and analysis. The method includes: calculating pixel equivalents and establishing a displacement conversion relationship between image displacement and actual physical displacement; adjusting the front and rear positions of the first extensometer clip and / or the second extensometer clip using positioning screws based on the spot deviation; activating the extensometer and high-speed camera to acquire extensometer displacement data sequences and tracer point sequence images, performing image displacement conversion processing on the sequence images to obtain a high-speed camera displacement data sequence; calculating the displacement deviation between the extensometer displacement data sequence and the high-speed camera displacement data sequence to generate a corrected extrusion deformation; and calculating the mechanical property parameters using real-time load, the corrected extrusion deformation, and preset specimen geometric parameters. This achieves high-precision measurement of extrusion deformation and automatic calculation of multi-dimensional mechanical property parameters in a single shear test.

The application discloses a kind of methods for evaluating the delamination fracture performance of wind power blade sandwich structure, it is related to blade sandwich structure experiment and simulation field, S1: prefabricated crack sample preparation;S2: sample processing;S3: experimental test;S4: theoretical analysis;S5: simulation modeling;S6: simulation model verification;S7: interface delamination backtracking analysis;The application can accurately obtain the delamination fracture material parameters of wind power blade sandwich structure, analyze the delamination failure load of sandwich structure by simulation model, obtain interface damage, crack propagation and other information of sandwich structure, and quantitatively evaluate the resistance of blade sandwich structure to delamination crack propagation.

This invention relates to the field of photovoltaic (PV) support technology, and discloses a method and apparatus for testing the strong wind resistance of cable-stayed PV supports. The method includes: conducting a static loading test on the PV panel to determine its ultimate wind resistance capacity; conducting a static tensile test on the connecting clips to obtain their ultimate tensile and compressive bearing capacity; conducting a static shear test on the connecting clips to obtain their ultimate shear bearing capacity; conducting a wind uplift test on the PV array; using aerodynamic testing to measure the wind load shape coefficient on the surface of the PV module and capture the abrupt change in the shape coefficient during the individual failure process of the PV panel; and using aerodynamic damping aerodynamic testing to measure the aerodynamic damping parameters of the PV panel under strong winds and their variation with wind speed. This invention enables strong wind resistance testing of cable-stayed PV supports, providing technical support for optimized support design.

This invention discloses a mechanical performance testing device and method for simulating the detachment of a plate rubber bearing. The device includes a loading beam, a support platform, a loading head, a plate rubber bearing, a bearing mounting platform, a hinge assembly, a push-pull mechanism, a horizontal displacement adjustment mechanism, and a control system. The support platform has a bearing mounting platform at its top left end, a plate rubber bearing at its top, a loading head at its top, and a loading beam at its top. The support platform is hinged to the right end of the loading beam. The fixed end of the push-pull mechanism is embedded in the support platform, and its output end is hinged to the bottom of the loading beam. One end of the horizontal displacement adjustment mechanism is horizontally fixed to the support platform, and its other end is detachably connected to the side wall of the bearing mounting platform. The control system is connected to both the push-pull mechanism and the horizontal displacement adjustment mechanism. The device simulates the bearing compression performance under eccentric detachment conditions and the bearing compression and shear performance under displacement detachment conditions in actual bridges.

The utility model relates to the technical field of shearing rheometer, and disclose a kind of asphalt dynamic shearing rheometer, including rheometer body, upper plate connected on rheometer body and lower plate connected on the operating platform of rheometer body, the outer wall of the operating platform of rheometer body is connected with mounting ring, L type slide is rotatably connected in the mounting ring, the top of L type slide is slidably connected with scraper, the bottom surface of scraper is slidably connected with the top surface of lower plate, the end outer wall of scraper is slidably connected with lower plug plate.The utility model is cooperatively arranged by mounting ring, L type slide, scraper and lower plug plate, so that overflow is rotated around lower plate by scraper and scraped off, overflow is cut off with the lower insertion of lower plug plate, scraper moves out, and lower plug plate is taken out, so that overflow is concentrated and away from the side of upper plate, overflow is cleaned separately after being separated from upper plate, and the operation between upper plate and lower plate is not delayed.

This utility model relates to the field of rock mechanics testing technology, and in particular to a cylindrical rock core direct shear test device. The cylindrical rock core direct shear test device includes a base plate, two sets of support plates, a support beam, and two sets of linear guide rails; a control box, installed on the outer wall of the support plates; two sets of guide rods, each set installed in a through slot in one of the two support plates, with a lifting plate slidably mounted on each set of guide rods. An upper shear sleeve is fixedly mounted on the lifting plate, and a positive pressure mechanism is installed on the support beam directly above the upper shear sleeve; a sliding frame, slidably mounted on the two sets of linear guide rails, with a connecting column fixedly mounted at the top of the sliding frame, and a lower shear sleeve fixedly mounted at the top of the connecting column. A clamping assembly for holding the cylindrical rock core is mounted on the lower shear sleeve. The cylindrical rock core direct shear test device provided by this utility model has the advantages of convenient loading and unloading and accurate testing.

The present application relates to the technical field of plate performance testing, and particularly relates to a kind of plate edge durability test method;It comprises the following steps: cutting plate sample into standard size test piece;Using thermal mechanical analyzer respectively test the linear expansion coefficient of test piece edge material and base material;The test piece after processing is placed in environmental test chamber and is subjected to cyclic test;Test piece is fixed on load testing device, and constant load is applied along the direction perpendicular to the edge interface of plate plane;Using flatness tester to measure the overall warping of test piece, compare with the warping data before testing, calculate the warping change, evaluate the actual effect of plate balanced laminating process on preventing warping after edge sealing;Using weighted scoring method to calculate the comprehensive score of edge durability;Realize that the long-term durability of plate edge sealing under complex working conditions can be comprehensively and accurately evaluated, and provide scientific and comprehensive technical support for edge sealing process optimization, material selection and structure design.

The application discloses a kind of cultivation shear irrigation integrated device of root-soil complex, it is related to geotechnical-plant interaction test instrument field, including integrated cultivation shear component, monitoring irrigation component and shear loading component;Integrated cultivation shear component includes upper half ring cutter, lower half ring cutter, flange and detachable screw, upper half ring cutter and lower half ring cutter end each connection has flange, two flanges are attached and overlapped, detachable screw is provided with the aperture of flange, monitoring irrigation component includes moisture detector, intelligent valve, controller, water and fertilizer supply box, water pipe and remote computer, the probe of moisture detector is provided with the moisture detector aperture of upper half ring cutter and lower half ring cutter side wall, controller is connected with moisture detector wiring, and is connected with remote computer, intelligent valve signal.The application uses the cultivation shear irrigation integrated device of root-soil complex described above, realizes root-soil complex in-situ cultivation, intelligent irrigation, shear test integrated operation.

The application belongs to the technical field of oil detection, and particularly relates to a spinning oil online detection system based on edge computing, which comprises the following steps: obtaining spinning oil frequency shift and energy loss data, fitting to obtain oil film adsorption capacity, viscoelasticity and shear loss modulus, combining microfluidic pressure signal to calculate fluid shear force, constructing a friction energy loss database and normalizing to form a feature vector, fusing with dielectric constant and ion mobility data, extracting interface conductance and molecular motion parameters, establishing a lubrication and charge conduction coupling model, converting the model into a spatial charge density matrix, matching the matrix with time domain data of the yarn tension transient state, calculating a correlation coefficient and generating an antistatic and smoothness coupling evaluation index, fitting a prediction model through multi-temperature and humidity, and outputting a quantitative conclusion to guide the formula and process. Through multi-sensing fusion and edge computing, the application realizes full-dimensional detection and optimization of oil performance, and improves detection precision and production efficiency.

The application discloses a kind of microscale high-precision compression-shear integrated mechanical loading device and method based on piezoelectric actuator.The device includes integrated strain gauge system piezoelectric actuator, high-precision mechanical sensor, X / Y / Z three-way piezoelectric displacement table and test table.Piezoelectric actuator and Y direction displacement table are fixed on the vertical two ends of test table, Z direction displacement table is placed on Y direction table, X direction displacement table is connected with Z direction table through steering mounting base A, and high-precision mechanical sensor is fixed on X direction table through steering mounting base B.The application realizes closed-loop control of piezoelectric actuator displacement through strain gauge system, effectively compensates hysteresis and creep error;combined with high-precision force sensor, force and displacement signals are synchronously collected;three-way displacement table is used to accurately center and switch compression, shear and other loading modes.The device is compatible with scanning electron microscope, can be in-situ observed, and is suitable for high-precision mechanical property testing of microscale materials.

A model test device for simulating environmental load and scouring effect on a suction caisson includes a laminar shear box. Multiple scouring pit simulation mechanisms are arranged around the suction caisson inside the laminar shear box, each scouring pit simulation mechanism includes a bracket disposed in the laminar shear box, the bracket is equipped with a telescopic arm connected to a cutting plate, and the cutting plate is curved fan-shaped. When the cutting plates move to positions where they are in contact with an outer wall of the suction caisson, the cutting plates are mutually connected to form a ring surrounding the suction caisson. An inner edge of the ring forms a complete circle attached to the outer wall of the suction caisson, an outer edge of the ring is higher than its inner edge, and the outer edge is located above the saturated soft clay in the water body.

The application discloses a hole wall in-situ shearing testing device for a conical heavy dynamic penetration test, and relates to the technical field of geological exploration equipment. The rack is provided with a shearing testing assembly, a penetration assembly and a power piece, and is further provided with a hole forming assembly. The cutter plate is provided with a plurality of blades, and the hinge joints of the blades are fixedly connected with soft bags. The soft bags are filled with fillers. The driving piece is used for changing the volume fraction of at least one kind of filler in the soft bags. The fillers are used for limiting the rotation of the hinge joints of the blades. According to the deformation amount, the influence degree of the soft bags at different depths on the shock wave is judged. The soft bags with a deformation amount less than a set value are phase changed from a non-blocking state to an over-blocking state, so as to reduce the interference of the soil disturbed by the dynamic penetration on the accuracy of the in-situ shearing test result.

This application discloses a creep testing device for a fiber composite-steel interface. The device horizontally supports the specimen using a first support and a second support. A first loading mechanism applies a downward vertical force to the specimen, with the point of application located between the first end and a pre-fabricated crack. A second loading mechanism applies a downward vertical force to the specimen, with the point of application located between the second end and the pre-fabricated crack. The fiber composite-steel beam interface of the specimen primarily bears Type II interfacial shear stress caused by bending deformation, while the Type I peel stress approaches zero. This avoids the combined stress-shear + peel stress generated by direct tension in traditional lap joints, enabling the test results to accurately reflect the interface's durability under pure shear.

The application relates to a comprehensive evaluation method for the durability of semi-flexible base materials and belongs to the field of pavement material performance evaluation. The evaluation method can improve the freeze-thaw durability of semi-flexible base materials by increasing the total amount of cement and emulsified asphalt and the mass ratio of emulsified asphalt to cement for the splitting strength and the compressive strength under the set specific evaluation conditions. For the fatigue durability under the action of freeze-thaw cycles, the fatigue durability of semi-flexible base materials can be improved by reducing the mass ratio of emulsified asphalt to cement. Therefore, the mass ratio of emulsified asphalt to cement of semi-flexible base materials needs to be reasonably determined by comprehensively considering the freeze-thaw durability and the fatigue durability. The application provides a multi-index evaluation method for the freeze-thaw durability and the fatigue durability, comprehensively analyzes and evaluates the durability of semi-flexible base materials, and realizes the coupling test and evaluation of the freeze-thaw durability and the fatigue durability.

This invention discloses a perforation method for preventing casing deformation by reducing reservoir stress differences, relating to the field of oil and gas extraction technology. The method includes the following steps: S1, acquiring reservoir and fracture information; S2, using the acquired information to determine the slip stress in natural fracture development zones, faults, or interlayers, and judging whether the slip stress reaches the slip condition. If so, proceed to step S3; otherwise, proceed to step S5; S3, using the acquired information, preset and adjust the location, fracture length, and net pressure of the anti-casing deformation perforation until the slip stress does not reach the slip condition; S4, pumping fracturing fluid into the anti-casing deformation perforation and sealing all perforation holes with temporary plugging material; S5, performing the main fracturing operation. This invention can reduce the horizontal stress difference in natural fracture or fault areas without sacrificing the reservoir stimulation effect, i.e., without changing the hydraulic fracture initiation location and fracture length in high-quality reservoir sections, by perforating and pumping in slip risk areas such as natural fractures or faults.

The present application belongs to the technical field of road engineering material testing, and particularly relates to a determination method for judging asphalt similarity based on a rheological curve, which adopts a dynamic shear rheometer to perform frequency scanning at multiple temperature points, and constructs a complex modulus master curve or a phase angle master curve based on the time-temperature equivalence principle. Through calculation of the overlapping degree of the confidence intervals of the difference factor F1, the similarity factor F2 and the WLF temperature sensitivity parameters, quantitative evaluation of the viscoelastic behavior of asphalt materials in the full temperature domain and the full frequency domain is realized. The present application first proposes a double-track determination framework, which can simultaneously reflect the differences in the master curve form and the temperature response characteristics, and supports comparison of multiple states such as unaged, RTFOT aged, PAV aged through a multi-condition batch processing mechanism. The method has high detection efficiency and strong repeatability, and is suitable for engineering application scenarios such as asphalt production quality control, road construction acceptance and oil source compatibility evaluation.

The application discloses a vane shear testing device for deep soft soil, and belongs to the technical field of in-situ geotechnical testing, which can solve the problem that the depth measured by the existing in-situ vane shear test is relatively shallow and cannot meet the existing engineering needs. The device comprises a conveying assembly connected with the bottom end of a drill rod of a drilling machine and used for conveying inflation fluid, a sleeve with the top end connected with the conveying assembly, the diameter of the sleeve matching the diameter of a drill hole, a capsule assembly fixed in the sleeve and connected with the conveying assembly and used for receiving the inflation fluid, the capsule assembly being coaxially arranged with the sleeve, a shearing assembly fixed on the outer wall of the capsule assembly, an avoiding hole arranged on the side wall of the sleeve, the capsule assembly being used for expanding by the inflation fluid to drive the shearing assembly to extend out of the avoiding hole, and a conical sharp head connected with the bottom end of the sleeve. The application is used for the vane shear testing of deep soft soil.

The utility model belongs to mechanical analysis equipment technical field provides a kind of engineering component internal force analysis appearance, the engineering component internal force analysis appearance includes mandrel and multiple component module;Multiple component module is successively sleeved on mandrel and mutually abuts and forms engineering component model, and component module is slidably engaged with mandrel;At least the outer peripheral surface or axial end surface of two adjacent component modules is respectively provided with angle scale stripe and pointer stripe;The outer peripheral surface of each component module is provided with grid stripe.The engineering component internal force analysis appearance provided by the utility model, the position of angle scale stripe is pointed to by pointer stripe, and torsion angle is directly and intuitively shown, and then torsion strain is directly and intuitively shown;When simulating the bending condition of engineering component, component module will turn over outward, and the outer side portion is mutually far away, and then bending strain is directly and intuitively shown.

The application discloses a kind of optical fiber pressure sensor life prediction methods based on multi-factor aging.The method is oriented to interface failure mechanism, assesses the life of sensor, first by standardized test determines the initial shear strength of adhesive layer material;Then predict working shear stress by finite element analysis;Then design and execute multi-factor accelerated aging test, obtain the strength degradation data under the joint action of temperature, humidity, cyclic loading, finally combine real-time monitoring data to correct working shear stress, calculate the service life under specified reliability based on Weibull statistics.The application first improves Eyring model, and combines the improved Eyring model with strength degradation model, establishes a systematic parameter determination standard and reliability evaluation system, significantly improves the reliability and service life predictability of sensor in actual engineering.

The application relates to the technical field of shearing experiments, and discloses a supporting and fixing device for shearing experiments of metal material composite plates, which comprises a workbench, the top of the workbench is fixedly connected with a supporting plate, the top of the supporting plate is fixedly connected with an oil cylinder, the output end of the oil cylinder is fixedly connected with a moving plate, the bottom of the moving plate is fixedly connected with a shearing plate and an extension rod respectively, the end, away from the moving plate, of the extension rod is fixedly connected with a pressing plate, the inner wall of the top of the workbench is slidably connected with a limiting plate, two limiting grooves are arranged on the surface of the limiting plate, the inner walls of the two limiting grooves are movably connected with two moving rods respectively, and one end of the moving rod is fixedly connected with a clamping plate. The clamping plate is gathered and the limiting plate is pressed down, so that the workpiece can be clamped; even if the thickness and the width of the workpiece are changed, the device can still tightly fix the workpiece on the workbench.

This application discloses a rapid method for determining the macroscopic strength parameters of layered rock masses. For layered rock masses without discontinuous joints or fractures, the method includes the following steps: S1. Conducting conventional uniaxial triaxial compression tests on matrix rock blocks to obtain the stress-strain curves of the matrix rock blocks, and fitting the peak strength and residual strength of the matrix rock blocks under different confining pressures to obtain the strength parameters of the matrix rock blocks; S2. Conducting shear tests on bedding samples to obtain the stress-strain curves of the bedding surfaces, and fitting the peak strength and residual strength of the bedding surfaces under different normal stresses to obtain the strength parameters of the bedding surfaces; S3. Taking the average of the peak strength of the matrix rock blocks and the peak strength of the bedding surfaces, as well as the average of the residual strength of the matrix rock blocks and the residual strength of the bedding surfaces, to obtain the macroscopic equivalent strength parameters of the layered rock mass without discontinuous joints or fractures.

This utility model discloses a door and window physical performance testing device that facilitates the fastening of doors and windows in the field of door and window testing equipment technology. It includes a support frame, with physical testing components arranged on the top and sides of the support frame. Door and window panels are placed on one side of each physical testing component. The physical testing component includes a stamping testing part installed on the top of the support frame. Placement adjustment parts are arranged on both sides of the support frame. This door and window testing device, through the coordinated work of the support frame and the physical testing components (which include identically constructed stamping testing parts and placement adjustment parts), utilizes a hydraulic cylinder to adjust the distance between two sets of stamping positioners. This allows for flexible adaptation to door and window panels of different lengths and specifications. This flexible adjustment mechanism not only meets diverse testing needs and reduces time and labor costs associated with frequent parts replacement, but also achieves high efficiency and convenience in the testing process.