72 results about "Shear testing" patented technology

The invention discloses an on-line monitoring and fault early warning system for the running state of a dynamic compression-shear testing machine, belongs to the technical field of fault diagnosis, and aims to solve the problems of poor adaptability to multiple motion modes, lagging fault early warning and fuzzy fault positioning in the prior art. According to the system, core collaborative link fault sensitive point monitoring parameters are matched according to a current motion mode, a dynamic threshold value is generated to construct a fault judgment threshold value system, real-time data subjected to cyclic division are collected and loaded to generate a time sequence data set, a reference candidate range state is judged based on the threshold value, and a fault judgment reference library is constructed; and executing deviation analysis prediction trend through the reference library, generating a compensation instruction, identifying potential faults in combination with a threshold value, an actual value and a prediction value, calculating a link fault probability, and completing diagnosis. According to the invention, monitoring adaptability and accuracy can be improved, compensation in advance and accurate fault early warning are realized, and stable operation and test accuracy of equipment are guaranteed.

The invention provides a dynamic load-oriented brazed diamond bonding strength testing device and method. The dynamic load-oriented brazed diamond bonding strength testing device comprises a base, a test framework, a self-adaptive sample holding unit, a data acquisition unit and a visual auxiliary alignment unit, the self-adaptive sample holding unit realizes stable clamping and angle adjustment of a sample through a rotatable platform, a translation bottom table, a hydraulic clamping cylinder and an angle adjusting piece; the data acquisition unit acquires a shear force-displacement curve by using a fiber bragg grating sensor, and a high-speed camera records a fracture process; and the vision-assisted alignment unit (high-resolution industrial camera) is used for calibrating the positions of the sample and the pressure head. The method comprises the steps of intelligent pre-characterization clamping, variable load dynamic shear testing, in-situ fracture mode judgment, multi-mode effective fracture area measurement and multi-dimensional strength characterization. According to the invention, the sample positioning and clamping stability is improved, the loading interference is reduced, the interface bonding strength is quantitatively and reliably represented under the dynamic load, and the test accuracy and repeatability are guaranteed.

The utility model discloses an in-situ shear test device, which relates to the technical field of in-situ testing, and comprises a movable frame, an arc-shaped clamping plate, a limiting screw rod and a sampling sleeve, the movable frame comprises two connecting lug plates, the two arc-shaped clamping plates are located between the two connecting lug plates, and the inner arc sides of the two arc-shaped clamping plates are oppositely arranged; the two limiting screw rods are in threaded connection with the corresponding connecting lug plates respectively; a clamping groove is formed in the outer wall of the sampling sleeve in the circumferential direction, one end of each limiting screw rod penetrates through the corresponding connecting lug plate and can push the two arc-shaped clamping plates to move relatively, and the inner arc sides of the two arc-shaped clamping plates can abut against the clamping groove; and a cutting knife assembly is arranged on the outer arc side of the arc-shaped clamping plate. The in-situ shear test device disclosed by the utility model can reduce contamination, is convenient to disassemble and clean, and improves the test efficiency.

This invention provides a multi-field coupled shear testing device, including a test host, a pressure chamber, a power distribution cabinet, and a water supply device. The test host is supported by a workbench. The confining pressure chamber, together with the vertical, horizontal, and longitudinal loading systems, applies a three-dimensional static load. Within the horizontal loading system, an impact transmission rod connects to a nitrogen high-pressure emission chamber to achieve impact loading. The sealed high-temperature chamber has a vacuum glass window on the outside, and the internal shear box chassis is raised and equipped with water channels. A membrane is used to wrap the specimen to prevent leakage. The vertical loading system has a built-in cooling device, and an acoustic emission probe is installed on the pressure rod to monitor damage in real time. This device achieves multi-field coupling of high temperature, high pressure, seepage, and impact through modular design, offering high loading accuracy and convenient operation. It solves the functional conflicts and monitoring lag problems of traditional equipment and is suitable for multi-field mechanical property testing of geotechnical materials.

A bidirectional constant stiffness constraint rock shear testing device includes; a base 1; a fixed component, including an L-shaped shearing plate 2 and a fixed pressure head 8 connected with each ot

The invention belongs to the technical field of rock-soil and ecological engineering experiments, and particularly relates to a double-sided shear tester for the shear strength of root soil and an experimental method. The sample shearing mechanism is used for placing a sample obtained by in-situ culture of a target soil body; the sample shearing mechanism is arranged in the middle of the main body frame; the sample shearing mechanism comprises a lower fixing ring and an upper fixing ring which are fixed with the main body frame, and a shearing ring which is in horizontal sliding fit with the main body frame, the shearing ring is positioned between the lower fixing ring and the upper fixing ring, the lower fixing ring and the upper fixing ring are coaxially arranged, and when the shearing ring and the lower fixing ring are coaxial, the shearing ring and the upper fixing ring are coaxially arranged. The inner sides of the lower fixing ring, the shearing ring and the upper fixing ring form a cavity for placing a sample; a counter-force unit is arranged in the lower fixing ring, and a pressurizing unit is arranged in the upper fixing ring; one side of the shearing ring is in transmission fit with the movable end of the telescopic mechanism, and a sensor is arranged on the shearing ring; the moving direction of the shearing ring is parallel to the radial direction of the lower fixing ring. The invention further discloses a testing method using the device.

This invention discloses an in-situ self-reaction force testing device and method for transverse shearing of pre-embedded channels. The device includes a reaction beam, two reaction fixed supports, two force transmission rods, a force sensor, a force transmission box, a sleeve, a displacement sensor, a connecting rod, and a force application mechanism. The sleeve is fixed to the shearing test point of the pre-embedded channel. The force transmission box is sleeved outside the sleeve. The force sensor is connected to the force transmission box and the connecting rod. The connecting rod is slidably connected to the reaction beam and fixedly connected to the force application mechanism, and is driven by the force application mechanism to move relative to the reaction beam. The two reaction fixed supports are symmetrically arranged on both sides of the shearing test point and fixedly connected to the pre-embedded channel. The two force transmission rods are symmetrically arranged on both sides of the connecting rod. One end of each force transmission rod is fixedly connected to the reaction beam, and the other end abuts against the pre-embedded channel. The displacement sensor is used to measure the movement distance of the transverse shearing test point. This testing device has a wide range of applications, few components, is easy to assemble and disassemble, is small in size and light in weight, and is easy to carry.

This invention discloses a method for obtaining the strength of a pillar considering friction factors, comprising: preparing rock samples with different aspect ratios and configuring contact surface materials with different tribological properties; determining the cohesion and friction coefficient of each contact surface material through shear testing, conducting compressive strength tests on rock samples with different contact surface materials to obtain rock sample strength data under different friction levels and aspect ratios; selecting a pillar strength calculation formula corresponding to the actual contact conditions between the pillar and the surrounding rock, calculating the strength of the target pillar under design conditions, and calculating the load on the pillar itself based on the pillar area bearing theory; calculating the pillar safety factor based on the pillar strength and the load, and optimizing the pillar design accordingly.

This invention belongs to the field of testing technology, specifically relating to a dynamic shear test device and method for a flexible connection assembly of an aircraft fuel system. The test device includes a reciprocating assembly, a clamping assembly, and a loading assembly. A second push block in the reciprocating assembly is connected to a first locking block in the clamping assembly. The loading assembly is located on one side of the clamping assembly. The reciprocating assembly applies a shear load to the flexible connection assembly. The clamping assembly is responsible for clamping and fixing the test tube. The loading assembly injects pressure into the test tube. By connecting two test tubes using the flexible connection assembly, and controlling the pressurization module in the loading assembly to pressurize the test tube and the electric cylinder in the reciprocating assembly to apply thrust to the test tube, the internal working pressure and external shear load of the flexible connection assembly are tested. This provides standard equipment and methods for conducting life testing research on flexible connection assemblies, and also provides a reference for the selection of flexible connection assemblies.

The invention discloses a high-speed ring shear test device and a use method thereof, and belongs to the technical field of high-speed ring shear tests. According to the high-speed ring shear test device provided by the invention, a composite structure system with high-speed rotation driving and controllable axial loading is constructed, so that high-speed dynamic simulation of mechanical behaviors of a soil sample is realized. According to the upper rotation driving system, a first servo motor is matched with a low-friction bearing to drive an upper shearing cover plate, the stability of high-speed rotation around a shaft is guaranteed by reducing mechanical transmission resistance, and therefore the speed limit of a traditional ring shearing device is broken through; the shearing execution cavity and the inner ring of the shearing cavity form a stepped shearing cavity through an annular groove with increasing diameter at the bottom of the upper shearing cover plate, so that effective constraint of a soil sample in the high-speed shearing process is ensured, and the shearing area is maintained to be constant through an annular cavity structure. The lower axial loading system is linked with the lower shearing device through a shearing box supporting disc, so that the axial stress loading condition can be accurately controlled, and the stress states of different depths in the actual landslide can be simulated.

The utility model provides a kind of LNG bubble piece shearing test workpiece's glue removing device, including bottom plate, driving mechanism, cutter and limiting assembly are provided on the bottom plate, the cutter is set in the movement output end of driving mechanism, the driving mechanism is used to drive cutter to reciprocate, the limiting assembly forms the glue removing station of limiting shearing test workpiece movement, shearing test workpiece is placed in the glue removing station, the glue removing station is located directly below the movement path of cutter, the movement path of the cutter tip is the plane parallel to the plane where glue removing station is located;According to the structure characteristics and cleaning requirement of shearing test workpiece are fixed, ensure that there is no deviation, no shaking in cleaning process;By simple electrical control driving cutter reciprocation, the residual bubble piece on shearing test workpiece is cleaned, cleaning speed is fast, effectively guaranteeing fixture rapid turnover reuse;Simple structure, easy to maintain;High degree of automation, effectively save time and labor cost.

The present application relates to a kind of laboratory concrete early strength blade shear test device, comprising: test table, shear test system and data monitoring system;The shear test system is arranged on the test table, to detect the sample on the test table;The data monitoring system is arranged on the shear test system to collect test data;The shear test system and the data monitoring system are connected with the computer control in laboratory.The concrete early strength blade shear test device provided by the present application realizes the automatic control of cross plate penetration, shear, and the real-time continuous intelligent monitoring of shear parameters, avoids the influence of human subjective factors, so the evaluation result is more reliable, ensures the accuracy of test result.

The invention provides three-sample dynamic double-shear test equipment and a three-sample dynamic double-shear test method, and relates to geotechnical engineering. The three-sample clamp system comprises two horizontal bearing tables, and a downwards sunken avoiding groove is formed between the two horizontal bearing tables; two lateral dynamic constraint systems; a vertical dynamic loading system; the measurement and control system is used for controlling the two horizontal actuators to clamp the middle sample between the two single-side samples and controlling the vertical actuators to apply vertical loads to the two single-side samples and the middle sample, so that the middle sample moves downwards relative to the two single-side samples; therefore, two parallel shearing surfaces are formed on the contact side surfaces of the two single-side samples and the middle sample. The method has the beneficial effects that the possibility of deflection of the sample is eliminated from the mechanical principle, the extreme uniformity of stress distribution on the shear surface is ensured, and the non-representative local damage of the joint surface is effectively avoided, so that the shear test precision is remarkably improved.

The invention relates to a track shoe shearing test bench and a using method thereof, in particular to an engineering mechanical performance testing device, in particular to a multifunctional test bench used for simulating shearing characteristics of crawler-type equipment under different soil and snow soil conditions, and belongs to the technical field of mechanical design and vehicle engineering. The device drives a fixed pulley to realize mechanical steering through a vertical servo electric cylinder transmission unit, ensures that a track shoe does not generate vertical displacement during shearing through a horizontal guide rod, draws the track shoe at a constant speed to shear a ground medium, and obtains a relationship between displacement and shearing force when the track shoe shears the ground medium at a constant speed through a tension sensor. The creeper tread shearing test bed can efficiently and accurately simulate the ground medium shearing condition of the creeper tread under the actual working condition, it is ensured that vertical displacement does not occur in the creeper tread shearing process, accurate and reliable test data are provided for design, research and development and quality detection of the creeper tread, and the performance and reliability of the creeper tread can be improved.

The application relates to the technical field of underground construction, and relates to a high-pressure grouting stratum reinforcing method based on dynamic regulation and control, which comprises the following steps: confirming a grouting reinforcing environment based on a grouting reinforcing instruction, sampling rock and soil of a rock hole to be grouted by using a sampling ring cutter, obtaining test rock and soil blocks, carrying out penetration shear testing on the test rock and soil blocks, obtaining a rock and soil penetration index, a rock and soil specific weight and a rock and soil stress equation, carrying out property evaluation on the rock and soil penetration index, the rock and soil specific weight and the rock and soil stress equation based on a pre-constructed grouting pressure difference model, obtaining an initial grouting pressure, a limit hole bottom pressure and an initial grouting consistency, dynamically fine-tuning grouting of a set grouting system based on the limit hole bottom pressure, obtaining a target grouting system, confirming a reinforcing construction stratum based on the target grouting system and the construction stratum, and completing grouting stratum reinforcement. The application can improve the safety and automation degree of grouting construction and improve the grouting reinforcing effect of the stratum.

The invention relates to the technical field of in-situ determination of shear strength of a soil body, in particular to an in-situ determination method and system for shear strength of the soil body in a saturated state, and a vane monitoring management module in the system is used for monitoring the shear strength of the soil body in situ after the in-situ soil body to be measured reaches the saturated state. Vertically penetrating the vane of the portable vane shear apparatus into a preset depth in the saturated soil body along the central axis of the inner ring of the double-ring permeation water injection test device at the same test point; shearing and breaking the in-situ soil body to be measured, and synchronously recording the peak torque and the residual torque. According to the invention, the double-ring permeation saturation process and the vane shear test process are creatively integrated at the same pilot point to form a continuous, in-situ and integrated test process for saturation determination; through an integrated testing process of first saturation and second shearing, the technical effects of clear testing state, high testing efficiency and high data reliability are achieved, and the industrial problem that the in-situ shearing strength in the saturation state cannot be clearly obtained by a traditional method is fundamentally solved.

The application relates to the technical field of compression-shear testing machines, in particular to a dynamic compression-shear testing machine adaptive control method and system based on machine learning, which comprises the following steps: constructing a material parameter prediction model to predict the detection parameters and mechanical properties of the material; correcting the control parameters of the compression-shear machine through an adaptive control algorithm according to the real-time response data of the material in the testing process; collecting the surface image and internal ultrasonic signal of the material, extracting failure characteristic parameters such as crack area proportion, number of broken sections and maximum fracture length, and weighting and fusing to construct a critical failure criterion of the material; triggering safety protection when the material failure characteristic parameters reach a preset threshold value, automatically stopping the test and recording relevant data; and using the recorded data under the failure condition to incrementally learn and continuously optimize the material parameter prediction model. The method realizes intelligent adaptive control of the dynamic compression-shear testing process, and improves the testing efficiency, precision and safety.

The utility model relates to the field of compression-shear testing machines, and discloses a dynamic anti-backlash structure of a compression-shear testing machine. The dynamic anti-backlash structure of the compression-shear testing machine comprises a testing machine main body which comprises a loading frame and a workbench installed in the loading frame; the loading frame is used for loading the working table, the working table is used for loading the working table, the loading frame is used for loading the working table, and the gap eliminating device is arranged between the loading frame and the working table and is used for eliminating a gap of the working table in the moving process. The reverse force provided by the elastic element is used for counteracting the gap in the moving process of the workbench, the elastic element in the gap eliminating device can eliminate the gap and absorb impact force and vibration generated in the testing process, abrasion between mechanical parts is reduced, the vibration amplitude of the testing machine is effectively reduced through the buffering function, and the testing efficiency is improved. The operation stability of the equipment is improved, the service life of the testing machine is prolonged, and the maintenance cost and the maintenance frequency of the equipment are reduced.

The invention discloses a multifunctional integrated tension automatic tester, and relates to the technical field of tension testers, the multifunctional integrated tension automatic tester comprises a test platform, the edge of one side of the upper end surface of the test platform is fixedly connected with a back plate, one side of the back plate is provided with a tension test mechanism, the tension test mechanism is provided with a bending shear assembly, and the bending shear assembly is provided with a bending shear. The bending shear assembly and the back plate are both provided with clamps, one end of the back plate is fixedly provided with a control table, the left side of the upper end face of the testing platform is fixedly connected with a fixing table, one side of the fixing table is provided with an adjusting table, and the adjusting table is installed on the testing platform through an adjusting piece. By means of the tester, a tension test, a middle or edge shearing test, a pressure test, a stripping test, a middle or edge bending test and a pressure resistance test can be conducted on different test materials, the integration degree is high, the acquisition cost of equipment and the occupied space of the equipment can be greatly reduced, and the test efficiency is improved. More convenience and practicability are realized.

This invention belongs to the field of building material testing technology, specifically relating to a mechanical sensing-type asphalt admixture preparation shear strength testing device. It includes a fixed frame with a test chamber fixedly connected inside. A drive unit is fixedly connected to the upper end of the test chamber, providing driving force for the device. A mixing unit is fixedly connected to the middle of the drive unit, used for mixing asphalt and admixtures. A shearing unit is fixedly connected to the lower end of the drive unit, used for testing the shear strength of the mixture formed by the asphalt and admixtures. The shearing unit includes a mounting base, shear blades, a separating ring, and a layering block. The mounting base is fixedly connected to the drive unit, and multiple shear blades are provided, with each shear blade fixedly connected to the outer edge of the mounting base. This invention ensures stable high-speed operation through a three-blade symmetrical inclined design, integrating mixing and shearing functions, effectively improving the uniformity of material mixing and the accuracy and reliability of shear testing.

The application discloses a low-temperature ice sample or rock sample mechanical property detection device and a monitoring method thereof. The device comprises a shearing device, a temperature control device and a shearing mechanism. The shearing device comprises a loading frame, the shearing mechanism arranged in the space surrounded by the loading frame and the actuating mechanism mounted on the loading frame and used for applying a load to the shearing mechanism and the ice sample or the rock sample. The temperature control device is assembled with the shearing device and comprises a temperature control box and a control system used for controlling the temperature of the temperature control box. The temperature control box is inserted into the space surrounded by the loading frame to seal and surround the shearing mechanism. The low-temperature ice sample or rock sample mechanical property detection device can realize high-precision temperature control shearing test of the ice sample or the rock sample.

The application discloses a bonding process of a split permanent magnet with a magnetic flux bridge, comprising the following steps: S1, cleaning and pretreating the inner wall of a stator shell, and optionally performing roughening treatment on a preset magnetic flux bridge accommodating groove seat surface of the stator shell; S2, coating a controlled thickness adhesive on the magnetic flux bridge accommodating groove and the magnet bonding area of the inner wall of the stator shell, and controlling the thickness of the adhesive in the range of 0.08-0.20 mm; S3, placing a rigid soft magnetic flux bridge on the adhesive of the magnetic flux bridge accommodating groove, and pressing to diffuse the adhesive to form a controlled bonding layer; S4, placing at least one permanent magnet on the magnet bonding area of the inner wall of the stator shell, and making the magnetic flux bridge adjacent to the boundary area of the permanent magnet or located between the boundary areas of the permanent magnet; S5, curing the adhesive to form an integrated assembly, and uniformly applying pressure through a radial clamp during the curing process; and S6, detecting the air gap magnetic flux uniformity through a Hall probe or a Gauss meter after curing, and verifying the bonding integrity through a shear test.

The invention provides a fragile joint base material tensile shear test tool, equipment and method, the fragile joint base material tensile shear test tool comprises two support plates, any support plate is provided with an accommodating groove, two mutually bonded fragile test pieces can be respectively embedded in the accommodating grooves of the two support plates, the support plate base material is metal, and the support plate base material is made of metal. And the shear force transmission assembly is detachably connected to an external shear force test assembly so as to transmit the shear test force of the external shear force test assembly to the brittle test piece. According to the invention, the carrier plate is used for replacing a traditional clamp for direct clamping, clamping force and shearing force of an external shearing force test assembly are uniformly dispersed to the whole carrier plate by means of the rigid metal carrier plate, local stress concentration of a brittle test piece is avoided, and meanwhile, load impact is rigidly supported and buffered by means of the carrier plate; the problem that glass and other brittle test pieces are prone to fragmentation in a traditional mode is fundamentally solved, and the device has the advantages of being simple in structure, convenient to operate, wide in application range, high in detection precision, long in service life, capable of protecting the brittle test pieces and the like.

The utility model discloses an indoor table type vane shear tester capable of automatically penetrating and shearing. The indoor table type vane shear tester comprises a soil sampling cylinder and a vane shear plate head capable of entering the soil sampling cylinder along the opening direction of the soil sampling cylinder, the vane shear plate head is arranged on an up-down sliding device driven by a first stepping motor and can move up and down along the opening direction of the soil sampling cylinder; the up-down sliding device comprises a ball screw sliding guide rail parallel to the opening direction of the soil sampling cylinder, and a cantilever beam structural part which is arranged on the ball screw sliding guide rail and can be driven by the ball screw sliding guide rail to move up and down; the cantilever beam structural member is provided with a second stepping motor for driving the vane shear plate head to rotate; and an output shaft of the second stepping motor is coaxial with the center line of the opening of the soil sampling cylinder. According to the utility model, the vertical moving speed and distance of the vane shear plate head and the rotating speed and angle of the vane shear plate head can be accurately controlled, and the vane shear test accuracy and reliability are improved.

The utility model discloses a kind of composite material shear test fixture of linkage slide rail enhanced rigidity, including first slide rail, second slide rail, first clamping component and second clamping component;The first slide rail and second slide rail are parallel and horizontally arranged upside down;The upper end of first clamping component is slidably connected with first slide rail, and the lower end of first clamping component is connected with second slide rail;The lower end of second clamping component is slidably connected with second slide rail, and the upper end of second clamping component is connected with first slide rail;One side of test sample is fixed with the inside of first clamping component, and the other side of test sample is fixed with the side of second clamping piece.The beneficial effects of the utility model are that: first slide rail and second slide rail are additionally provided, respectively connected to form rigid closed loop by corresponding clamping component, the horizontal rigidity of entire shear test fixture is enhanced, avoid test sample to occur in shear test process, improve test accuracy.

This invention relates to the field of rock mechanics testing instruments, and discloses a fluid-solid isolation strain rate shear strength testing device and method in rock. The device includes a high-pressure power source assembly, a fluid-solid isolation force transmission assembly, a rock shear testing assembly, a core collection assembly, and a signal acquisition unit. The high-pressure power source assembly includes a liquid storage tank for storing liquid carbon dioxide, with an injection port and a detonation port on the tank. The fluid-solid isolation force transmission assembly includes a transfer cylinder and a transmission piston. The rock shear testing assembly includes a constraint ring and a flexible centering support assembly. The core collection assembly includes a flexible baffle facing the shear opening and a core collection box located below the shear opening. The signal acquisition unit includes the pressure sensor and a non-contact laser displacement sensor. This invention enables low-cost and high-efficiency testing of strain rate shear strength in rock.

The invention relates to the technical field of compression-shear testing machines, in particular to a dynamic compression-shear testing machine adaptive control method and system based on machine learning, and the method comprises the steps: building a material parameter prediction model, and predicting the detection parameters and mechanical properties of a material; according to the real-time response data of the material in the test process, correcting the control parameters of the pressure shearing machine through a self-adaptive control algorithm; the method comprises the following steps: acquiring a material surface image and an internal ultrasonic signal, extracting failure characteristic parameters such as a crack area proportion, a fracture number and a maximum fracture length, and carrying out weighted fusion to construct a material critical failure criterion; when the material failure characteristic parameter reaches a preset threshold value, safety protection is triggered, the test is automatically stopped, and related data are recorded; and performing incremental learning and continuous optimization on the material parameter prediction model by using the data recorded under the failure condition. By means of the method, intelligent self-adaptive control over the dynamic compression shear test process is achieved, and the test efficiency, precision and safety are improved.

The invention discloses a multi-dimensional judgment method applied to brake shoe anti-shearing test equipment, which comprises the following steps of: synchronously acquiring a continuous curve of shearing force and displacement, and recording displacement of a failure point; calculating the maximum shear strength; calculating a shear toughness index; calculating a shear stability index; calculating a comprehensive anti-shearing performance index; and performing result judgment based on the comprehensive anti-shearing performance index. The toughness and the process stability are combined, a three-dimensional judgment model is constructed on the basis of the traditional strength dimension, and scientific quantification and risk early warning of anti-shear test results are achieved. According to the multi-dimensional judgment method applied to the brake shoe anti-shearing test equipment, the toughness and the process stability are combined, the three-dimensional judgment model is constructed on the basis of the traditional strength dimension, and scientific quantification and risk early warning of anti-shearing test results are achieved.