32 results about "Shear strength test" patented technology

The invention provides a hierarchical mixture design index and optimization method according to functional requirements of different pavement layers (a surface layer, a middle surface layer and a lower surface layer) in combination with climate zoning and traffic load characteristics. According to the method, key mechanical parameters (the dynamic stability of a surface layer is greater than or equal to 6000 times / mm, and the low-temperature bending strain of a lower surface layer is greater than or equal to 2500 mu epsilon) are determined according to the horizon function, and then the mineral aggregate gradation and the special asphalt dosage are optimized through coupling analysis of volume parameters (the void ratio is 3%-5%, and the mineral aggregate void ratio is greater than or equal to 17%) and mechanical properties. And meanwhile, a bonding layer interface shear strength test (greater than or equal to 1.2 MPa) is introduced, so that the structural integrity is ensured.

The present application relates to the technical field of rock shearing, and especially relates to a rock shearing strength test device, a test system and a test method, wherein the test device comprises a counterforce base, horizontal loading devices, horizontal bearing plates, a vertical loading box, a vertical fixing box and vertical loading devices; the counterforce base has a loading chamber, a pair of horizontal loading devices are symmetrically arranged on two opposite side walls of the loading chamber, and each horizontal loading device is connected with a horizontal bearing plate; the vertical loading box and a groove on the vertical fixing box jointly form a space for placing a rock sample, and a roller is arranged on the contact surface of the vertical loading box and the vertical fixing box; the vertical loading devices apply a load to the sample through the vertical loading box. In the test process, the deformation and rupture characteristics of the rock shearing surface can be directly observed, the present application is more intuitive than the existing rock shearing device, is closer to the actual engineering, and has the characteristics of convenient operation and low cost.

The application discloses a kind of pressure-maintaining core cross plate shear device and shear strength test method, device includes sample pressure-maintaining system, test system, control system, data acquisition system;Sample pressure-maintaining system is guaranteed by ball valve to ensure the pressure state, reach the purpose of pressure-maintaining stable before and after testing, test system carries out shear test to test sample shear strength by cross plate, control system realizes the extension and contraction of telescopic rod and the work of torque applicator, ensure that cross plate enters sample and carries out work, data acquisition system is in real time by torque sensor, HX711 module, single-chip microcomputer, RS485 communication serial port acquisition, transport and process data, and save in PC end.The application can carry out the pressure-maintaining core shear test device of testing on ship.It has strong guiding function to study submarine landslide generation mechanism, realize the safe exploitation of flammable ice and ensure the safety of submarine engineering construction.

The invention relates to the technical field of geotechnical engineering and geological disaster prevention and control, and discloses a loess slope stability calculation method considering a stress state, and the method comprises the steps: building a slope three-dimensional model according to the landform, geologic structure and rock-soil body physical and mechanical parameters of a slope; applying a load in the side slope three-dimensional model and setting boundary conditions to obtain a stressed side slope three-dimensional model; carrying out stress field solving on the three-dimensional model of the stressed side slope to obtain a global stress field of the side slope; for each collected soil sample, extracting a corresponding stress tensor from the stressed slope three-dimensional model, and determining a confining pressure condition corresponding to an indoor shear strength test; according to the confining pressure condition, an indoor shear strength test is carried out, and a soil shear strength index under the actual stress field condition is obtained; a soil sample representative horizon method is adopted, the stratigraphic position corresponding to each soil sample is analyzed, the slope stability is calculated, and the slope safety coefficient and the potential sliding surface position are obtained. Therefore, the accuracy of slope stability analysis is improved.

The application discloses an anchor bolt shearing strength test device, and relates to the field of new anchor bolt material detection. The upper end of a preset base frame is provided with a driving motor assembly, the surface of the preset base frame is provided with a hydraulic driving assembly, and the output ends of the driving motor assembly and the hydraulic driving assembly are both provided with movable nesting pieces. The anchor bolt shearing strength test device is provided with a guiding and locking mechanism. The guiding and locking mechanism keeps the eccentricity-preventing and centering positioning state of the detected workpiece. The upper and lower ends of the locking butt joint pieces work together to keep the anchor bolt centered during the locking process, ensure that the shearing force is always perpendicular to the anchor bolt axis, and make the guiding and locking mechanism and the guiding spherical wrapping piece on the end side contact each other. The guiding spherical wrapping piece provides flexible wrapping while its uniform expansion characteristic further assists the anchor bolt in keeping the centered position, effectively eliminates the additional bending moment caused by eccentric loading, makes the measured shearing strength value closer to the real strength of the material, forms multi-dimensional positioning constraints, and improves the test accuracy and repeatability.

The invention discloses a triaxial shear strength testing method for a sewage discharge tunnel circular seam plugging ice plug body. The method comprises the following steps: S1, cutting a cylindrical sponge sample from medium-density sponge; s2, sleeving the side surface of the cylindrical sponge sample with a rubber membrane, and mounting a bottom steel support at the bottom; s3, injecting water into the cylindrical sponge sample in the rubber membrane to obtain a cylindrical sponge sample after water injection; s4, the cylindrical sponge sample after water injection is placed in a test block curing box and frozen at different set temperatures to form cylindrical sponge ice samples, and the set temperatures are the same as the average temperature of an ice plug body planned to be formed through liquid nitrogen freezing construction; s5, placing the cylindrical sponge ice sample in a triaxial testing machine, and performing a triaxial shear strength test under a set confining pressure to determine the shear strength of the cylindrical sponge ice sample under a simulated working condition; and S6, according to the test data in the S5, obtaining the triaxial shear characteristics of the cylindrical sponge ice at different set temperatures. The technical difficulty that an in-situ shear test cannot be performed on the ice plug body on site is solved.

The invention discloses a fractured rock mass high-pressure grouting sample manufacturing device and an interface shear strength testing method.The sample manufacturing device comprises a permeable stone box body, a fixed rock block and a movable rock block, and the fixed rock block is installed in one side of the permeable stone box body in a sealed mode and fixed through a rigid fixing supporting body; the movable rock block is mounted in the other side of the permeable stone box body in a sliding and sealing manner and is supported by a spring group; the interface shear strength test method comprises the following steps: mounting a test part on a sample, and mounting an adjustable cushion block for adjusting the position of the sample relative to a shear gap at the bottom of the sample so as to adjust the shear position; different shearing positions of the multiple groups of samples are tested, and data are recorded respectively. According to the manufacturing device for the fractured rock mass high-pressure grouting sample, the in-situ dehydration process of slurry in the high-pressure grouting process is simulated, the slurry stone body strength in the sample and the interface bonding strength of the slurry and rock are close to the in-situ state, and non-negligible errors caused by test conditions are greatly reduced.

The utility model discloses a device for testing shear strength of cement stabilized soil, which belongs to the technical field of soil detection and comprises a base, a shear box is arranged on the base and comprises a lower box and an upper box, the upper box is placed at the top end of the lower box and provided with four second through holes, and the second through holes are communicated with the lower box. According to the utility model, the tops of the four positioning rods on the positioning assembly slide into the four through holes II in the upper box, so that the upper box can be conveniently positioned and fixed, the placement time of a sample is greatly shortened, and the test efficiency of the direct shear apparatus is effectively improved; the lifting scraping disc is pushed to move upwards in the lower box through the lifting cleaning assembly, so that the fractured part of the sample in the lower box can be quickly taken out, residual sample scraps on the surface of the inner wall of the lower box can be conveniently scraped and cleaned, the operation time is greatly shortened, and the cleaning efficiency of the fractured part of the sample in the lower box is effectively improved.

The invention relates to the technical field of water conservancy projects, in particular to an asphalt concrete material shear strength testing device. Comprising a test box, the inner walls of the two sides of the test box are slidably connected with sliding blocks, the interiors of the sliding blocks are rotatably connected with bidirectional lead screws, one ends of the bidirectional lead screws are fixedly connected with rockers, the two sides of the bidirectional lead screws are in threaded connection with threaded blocks, the interiors of the threaded blocks are fixedly connected with connecting rods, and the outer walls of the connecting rods are rotatably connected with first rotating plates; a first rotating shaft is fixedly connected into the first rotating plate, and a pressure applying assembly is arranged on the lower surface of the supporting plate. According to the asphalt concrete material shear strength testing device provided by the invention, different extrusion heights between the pressure applying assembly and the test piece are adjusted to test the performance of the test piece under different stress conditions, and the ultimate shear force performance test of continuous extrusion until the test piece is fractured is realized; the pressure applying assembly is ensured to accurately apply different shear forces to different test pieces, test errors caused by inaccurate pressure applying positions are reduced, and the precision of test results is improved.

This invention discloses a method for testing the shear strength of the frozen soil-concrete interface in underground excavation and obstacle removal operations. The steps are as follows: S1, pouring concrete test blocks of the same strength as the actual underground continuous wall under the working conditions; S2, placing the concrete test block into one end of a mold box, and filling the other end of the mold box with the same type of core soil as the core layer in the actual working conditions; S3, placing the mold box into a test block curing box, and freezing it at different set temperatures to form frozen soil-concrete samples; S4, placing the frozen soil-concrete samples into a testing machine, applying vertical pressure to the frozen soil-concrete samples, and applying dynamic load in the horizontal direction using a shear actuator; S5, obtaining the test results of the shear strength of the frozen soil-concrete interface at different temperatures, and analyzing the overall stability of the frozen soil in the core layer under dynamic load. This invention solves the technical dilemma of not being able to conduct in-situ shear strength tests on the frozen soil-concrete core layer on-site, reducing the significant risks of underground continuous wall and frozen soil core layer construction during obstacle removal.

This application discloses a piezoelectric ceramic shear strength testing device, belonging to the technical field of testing equipment. The device includes: a base, a test column, a test base, and a limiting plate. The base has a through hole extending vertically, and its upper surface has a groove. The test column is placed in the through hole and can move vertically along it. A downward-opening test groove is provided on the outer wall of the test column, and the top of the test column is connected to a driving mechanism. The test base is placed in the groove, and its upper surface has a horizontal placement groove for placing piezoelectric ceramic specimens. The placement groove and the test groove face each other. The limiting plate is positioned above the test base. This device provides circumferential limiting for the piezoelectric ceramic specimens, effectively preventing slippage, warping, or skew during shear loading, thus improving the accuracy and repeatability of the shear strength test.

The application provides an interface shear strength test method, which comprises the following steps: step one, curing device manufacturing, manufacturing a hollow circular table with a preset inclined angle θ with the horizontal plane as a curing device; step two, combination body manufacturing, inverting and fixing the curing device on a first flat plate, pouring the prepared cement slurry into the cavity of the curing device until it overflows, placing a second flat plate on top to compact, curing and forming in a high-temperature and high-pressure environment, and then removing the first flat plate and the second flat plate to obtain a combination body; and step three, pressure test, placing the combination body on a fixing device, coaxially placing a pressure head on the top surface of the curing device, and starting a pressure test device to measure the interface shear strength. According to the test method, the curing device is designed as a hollow circular table with a certain inclined angle with the horizontal plane, and the inclined angle is specified to be within a certain range, so that the integrity of the demoulded sample can be effectively ensured, the reliability of the experimental results is ensured, and the demoulded sample can be further analyzed.

The utility model discloses a kind of shearing strength test fixtures for arc-shaped workpiece, it is related to tooling jig technical field. Including base, two guide rods are fixed on base, the upper portion of base is provided with pressing block, sliding hole is opened in pressing block, sliding slot is opened in the front end of pressing block, installation cavity is opened in the rear end of pressing block, push block is slidably arranged in sliding slot, the front end of push block is provided with inclined extrusion surface, moving plate is arranged in installation cavity, two clamping blocks are fixed on moving plate, recess is opened in guide rod. The utility model is pushed by push block by pressure head descending extrusion, clamping block is inserted in the recess of guide rod, the position of pressing block is fixed, prevent pressing block from moving in testing process, manually fixed without operator, after testing is completed, pressure head is lifted, clamping block can be removed from recess, can be carried out blanking, up and down material process is more simple, convenient to operate, can effectively improve work efficiency.

The invention relates to a manufacturing mold for a polymer-based wear-resistant lubricating material injection shear test piece. The manufacturing mold comprises an upper mold, a middle mold and a lower mold, assembling the middle mold into the test piece groove of the lower mold according to the mode that the test piece round hole is on the left, combining the upper mold according to the mode that injection molding openings are aligned, inserting a test piece round hole positioning pin, carrying out injection molding from right to left, opening the upper mold after injection molding is completed, and integrally taking out the middle mold and the injection molding sample strip from the position of the piece taking groove by using a tool; the whole is used for shear strength testing. According to the invention, the injection shear strength data can be simply and effectively obtained, the mold can flexibly carry out shear performance test and optimization test according to design requirements, and the related research and development cost is remarkably reduced.

The utility model relates to a clamp for high-temperature shear strength of a composite material welding interface, and belongs to the technical field of material detection. The clamp comprises an upper clamp body and a lower clamp body, the upper clamp body sequentially comprises an upper clamping rod, an upper platform and an upper vertical block from top to bottom, the cross section of the upper clamping rod and the cross section of the upper platform are circular, the cross section of the upper vertical block is semicircular, and the peripheral face of the upper platform coincides with the peripheral face of the upper vertical block. The lower clamp sequentially comprises a lower vertical block, a lower platform and a lower clamping rod from top to bottom, the sections of the lower clamping rod and the lower platform are circular, the section of the lower vertical block is semicircular, and the peripheral surfaces of the lower platform and the lower vertical block coincide; the arc-shaped bulge directions of the lower vertical block and the upper vertical block are opposite; a through groove is formed in the lower vertical block, and the center line of the through groove is parallel to the horizontal plane. The clamp is simple in structure, accurate in shear strength test result and suitable for a composite sample or a sample with a small size.

The present application provides a kind of carbon fiber laminated plate and foam sandwich structure glue rivet joint strength analysis method, including predetermined test condition to test specimen is carried out shear strength test, based on test condition establishes the test finite element model corresponding to test specimen, runs test finite element model and carries out simulation calculation etc.Steps.The present application reveals the difference of carrying capacity and failure mode of glue rivet joint in carbon fiber laminated plate and foam sandwich structure of glue rivet connection under shear and pull load by test and simulation combined analysis, establishes high-precision finite element model, can accurately predict glue rivet joint performance, optimize key design parameters provide possibility, break through the limitation of existing theoretical model or simplified model.

The invention discloses a landslide soil shear strength testing device, and relates to the field of soil shear strength testing, the landslide soil shear strength testing device comprises a mounting plate, a disc is rotatably arranged in the mounting plate, a horizontal limiting mechanism is arranged on the disc, the horizontal limiting mechanism is connected with a drilling testing mechanism, a plurality of movable supporting mechanisms are arranged below the mounting plate, and the movable supporting mechanisms are connected with the drilling testing mechanism. The multiple movable supporting mechanisms are all rotationally connected with a second gear ring arranged on the lower surface of the mounting plate, the front side of the mounting plate is fixedly connected with a support mechanism, and the support mechanism is rotationally connected with the first gear ring and the second gear ring. According to the landslide soil body shear strength testing device, linear movement adjustment of the drilling testing mechanism is achieved, the testing coverage range of the landslide soil body shear strength is greatly expanded, and it is guaranteed that testing data are more representative and comprehensive; the supporting stability of the device in a landslide soil body is obviously improved, and a solid guarantee is provided for the accuracy of a shear strength test result.

The utility model relates to an auxiliary device for a compression-shear strength test of a formed marble adhesive, which comprises a bottom plate, a fixed side plate and a push-pull side plate, the fixed side plate and the bottom plate are fixed by welding, and the push-pull side plate can translate on the bottom plate to control the distance between the push-pull side plate and the fixed side plate. Limiting fixing blocks are arranged on the opposite side walls of the fixing side plate and the push-pull side plate to clamp a test block. The limiting fixing blocks on the fixed side plate and the push-pull side plate can quickly clamp a test piece, the test piece can be quickly positioned without a marking tool and a steel ruler, the requirement of a test on the size of a stone lap joint surface is ensured, and meanwhile, the influence of shaking and inclination of the test piece on a test result during sample preparation is avoided.

The invention provides a cemented sand gravel in-situ testing device and a deformation modulus and shear strength testing method.The cemented sand gravel in-situ testing device comprises a force transmission base plate, a plurality of pull rods are hinged to the force transmission base plate and evenly distributed around the force transmission base plate, and anchoring assemblies are hinged to the lower ends of the pull rods and anchored to the ground; a force transmission column, a vertical jack, a first base plate and a pressure bearing plate for pressurizing the top of a test piece are sequentially and downwards arranged on the lower side of the force transmission seat plate; a plurality of vertical displacement sensors are distributed on the top of the bearing plate, and the vertical jack is connected with a vertical pressure sensor for measuring the pressure of the vertical jack. According to the invention, the in-situ test of the cemented sand gravel is realized, and the cost is low; material disturbance and stress release in the sampling and sample preparation process are avoided, the result is real, and data are accurate; and a reliable technical support is provided for evaluating the mechanical property of the large-particle-size cemented sand gravel.

The application discloses a kind of steel beam shear strength testing devices for building structure engineering, it is related to shear strength test technical field, to solve the technical problem of low functionality of steel beam shear strength testing devices for building structure engineering, including testing machine body, lifting slide unit, fixed mechanism, mounting seat B, testing mechanism and transmission mechanism.The application is designed by testing mechanism structure, when plug-in assembly is plugged with mounting seat B, it can drive inner turntable relative to outer turntable rotation, two opposite components drive four test components to move two by two, simulate the bidirectional shear force of flange, test the shear performance of flange under this working condition, when plug-in assembly is plugged with inner turntable, it can drive inner turntable and outer turntable to rotate simultaneously, so that four test components rotate simultaneously, simulate the connecting part of flange to receive continuous torsional shear force, test the shear strength of flange under torsional shear, improve the functionality of steel beam shear strength testing device.

The invention relates to the technical field of coarse-grained soil shear strength estimation data analysis, and discloses a coarse-grained soil shear strength estimation method and device, computer equipment and a storage medium. The method comprises the following steps: obtaining the fractal dimension of coarse-grained soil, obtaining reproduced soil, obtaining the fractal dimension of the reproduced soil, and preparing a parallel-level counterweight soil preparation sample when the error between the fractal dimension of the coarse-grained soil and the fractal dimension of the reproduced soil meets a preset threshold range, and carrying out a shear strength test on the parallel-level counterweight soil preparation sample to obtain an internal friction angle and cohesive force so as to estimate the shear strength of the coarse-grained soil. The device, the computer equipment and the storage medium all correspond to the method. The reduced scale grading method based on the fractal dimension similarity criterion effectively maintains the particle skeleton structure, reduces the cohesive force estimation error and improves the shear strength parameter measurement precision through the cohesive force correction coefficient equation according to the maximum particle size scaling ratio, is better in adaptability to the large scaling ratio, and provides a new way for economically and efficiently obtaining the coarse-grained soil strength parameter.

This invention provides an integrated geological engineering rock mechanics testing device for oil and gas wells, comprising a shell, two clamping assemblies, a first testing assembly, and a second testing assembly. The shell is equipped with two clamping assemblies, and the second testing assembly is used to perform direct shear strength testing on rock samples. This invention relates to the fields of geological engineering and oil and gas well testing. By providing two clamping assemblies on the shell, two rock samples from the same batch can be simultaneously fixed. Combined with the first and second testing assemblies respectively positioned above the two clamping assemblies, uniaxial compressive strength and direct shear strength tests can be completed synchronously without the need for batch testing. This not only shortens the testing cycle and reduces the labor intensity of operators but also ensures batch consistency of the two test samples, avoiding the influence of testing environment and batch differences on the data. This makes the test data more correlated and comparable, providing more reliable parameter support for integrated geological engineering design.

The invention belongs to the technical field of strength tests, and particularly relates to a method for testing the bonding interface strength of a two-phase composite material. The method mainly comprises the steps that S1, a second composite material is bonded to the upper portion of a first composite material, the first composite material and the second composite material have the same width D, and the length of the first composite material is larger than the length L of the second composite material; s2, tensile loads are applied to the two ends of the first composite material till the bonding interface of the first composite material and the second composite material is in an initial damage state; s3, the elongation K1 of the first composite material and the equivalent modulus E2 of the second composite material in the length direction are determined; and S4, calculating the shear strength t of the bonding interface according to the following formula: t = K1 * E2 / (D * L / 2). According to the invention, related shear strength tests can be carried out for specific bonding thickness, and a general scheme is provided for strength evaluation of bonding interfaces of various heterogeneous materials.

The utility model relates to a precast pile anti-shearing detection support device which comprises a combined channel and a sliding track which are arranged in parallel, and a fixed support and a sliding support which are bridged at the top ends of the combined channel and the sliding track, the bottom end of the fixed support is movably connected with a first gear, and the bottom end of the sliding support is movably connected with a second gear. A first rack and a second rack are sequentially arranged at the top end of the combined channel, a first indicating ruler and a second indicating ruler are sequentially arranged on the side wall of the combined channel in the length direction, the gears are meshed with the corresponding racks respectively, the bottom end of the sliding support is adjustably connected with the combined channel through a horizontal adjusting rod, and a limiting rod is arranged at the bottom end of the sliding support in a penetrating mode. The limiting rod is in rolling connection with the combined channel and the sliding rail, the top end of the sliding support is fixedly connected with a cross beam, the cross beam is provided with a water level, a precast pile is erected at the top ends of the fixed support and the sliding support, and a distribution beam is arranged at the top end of the precast pile. The precast pile shear resistance detection support device has the advantages of being convenient to adjust, improving the adjusting precision, improving the safety and the like.

The invention relates to a method, a device, equipment and a medium for estimating the shear strength of a waterproof bonding layer, and the method comprises the following steps: carrying out shear strength test on a plurality of composite plate-shaped test pieces in a plurality of temperature and humidity combinations to obtain a shear test result; the shear test result comprises the initial shear strength of each temperature and humidity combination; calculating the initial shear strength of other temperature and humidity combinations according to the initial shear strength of the target temperature gradient and the initial shear strength of the target relative humidity gradient in the temperature and humidity combinations to obtain shear strength conversion coefficients of different temperatures and humidity; predicting shear strength in other temperature and humidity environments according to the shear strength conversion coefficient to obtain predicted shear strength; by establishing a multi-temperature and humidity combined test system and combining the shear strength conversion coefficient to predict the shear strength, the influence of the temperature and humidity coupling effect on the shear performance of the waterproof bonding layer in actual engineering can be accurately simulated, and the method has the advantage of improving the shear strength prediction precision under complex environmental conditions.

The utility model relates to engineering test technical field discloses an engineering material shearing strength test device of adjustable loading angle, including support platform, the top rear side fixedly connected with fixed plate of support platform, the front side top of fixed plate is rotatively connected with adjusting disc, the front side of adjusting disc is opened with the sliding slot, the inner wall left and right sides of sliding slot all are slidably connected with a plurality of clamping blocks, the front side edge of adjusting disc is fixedly connected with the sliding frame, the inner wall rotationally connected with two -way screw rod of sliding frame, the rear side of adjusting disc all are opened with a plurality of adjusting holes. In the utility model, adjusting disc has the sliding slot and makes clamping block slide under the assistance of sliding frame, rotates two -way screw rod and makes clamping block synchronous movement clamps tightly material, pulls out the positioning frame and can rotate adjusting disc angle, after loosening, the positioning frame is clamped back adjusting hole under the action of spring, simple structure, convenient operation can adjust multiple angles, improve shearing test accuracy, satisfy the adjustment demand.

The utility model relates to soil sample detection technical field especially relates to a kind of shearometer for soft soil shear strength test, it includes folding plate groove, folding plate groove bottom is placed with water collecting tank, folding plate groove upper side is fixedly installed with frame, and frame bottom is provided with the shear strength test component for soft soil detection;Shear strength test component includes box groove, upper sleeve frame, valve plate and first hydraulic rod, first hydraulic rod output end is fixedly connected with valve plate, and valve plate bottom is fixedly installed with upper water-permeable stone plate, and upper water-permeable stone plate and upper sleeve frame inner wall sliding contact, and valve plate side wall is evenly connected with several drainage hoses, and drainage hose inside end extends to upper water-permeable stone plate upper side, and box groove bottom is provided with several bottom through-holes.The utility model is provided with shear strength test component, has complete water filtration and drainage path, can keep mesa clean, facilitate the normal progress of subsequent test, reduce the workload of staff, strengthen practicality.

This application relates to a testing device and method for the shear strength of weathered granite soil under high-pressure seepage. This application is applicable to the field of geotechnical testing technology. The main structure of the testing device for the shear strength of weathered granite soil under high-pressure seepage is as follows: Inside the test chamber, from bottom to top, are arranged a lower water collection and diversion component, a soil sample installation area, and an upper water collection and equalization component. All three are completely covered by a flexible impermeable membrane, forming a sample assembly. A high-pressure seepage control mechanism is connected to the upper water collection and equalization component to apply a constant high-pressure seepage water pressure to the test soil sample; a controllable drainage and liquid collection mechanism is located at the bottom of the chamber and connected to the lower water collection and diversion component to discharge seepage water; an axial consolidation loading mechanism is located above the chamber to apply a constant axial consolidation pressure; the shear execution end of the in-situ shearing mechanism is pre-embedded in the test soil sample to perform in-situ shearing; a data acquisition instrument is connected to corresponding sensors to synchronously collect shear torque, shear stress, and pore water pressure.

The invention discloses a fan blade foam core material shear key design method, which comprises the following steps of: firstly, establishing a finite element simulation model to facilitate simulation of a subsequent shear strength test, performing shallow slot design between deep slots on the basis of the existing deep slot design, and designing a shear key between the deep slots on the basis of the existing deep slot design. The size, the shape and the set angle of the shallow slot can be set at will, and the design of the shallow slot transverse shear key can enhance the shear strength according to simulation data; by designing the positions of the through holes, the positions of part of the through holes coincide with the deep grooves, so that the vertical shear key is designed, the size, the shape and the inclination angle of the through holes can be set at will, and it can be obtained through simulation data that the mode that part of the through holes coincide with the deep grooves is designed, and the shear strength can be enhanced; the method can effectively improve the shear strength of the foam core material, and is suitable for structural design of the foam core material in the fan blade.