23 results about "Shear load" patented technology

This invention discloses a perforated steel connector and a wall connector for post-cast connections in the joint area of ​​modular concrete buildings. The connector is a long strip-shaped metal component, including a web and flanges forming guide surfaces at both ends of the web. The main cross-section adopts a cross-sectional shape where the flanges can be integrally inserted into and accommodated in the slots of a groove-shaped fastener. Through holes are regularly spaced along the length of the web. The groove-shaped fasteners are hung and fixed in pairs to the joint area of ​​the precast concrete module. The flanges at both ends of the steel connector are inserted into the groove-shaped fasteners. Post-cast concrete fills the groove-shaped fasteners and the through holes passing through the steel connectors, forming an integral connection node in the joint area. This invention addresses the shortcomings of the joint area, where the stress performance differs significantly from that of cast-in-place structures, the force transmission path is discontinuous, and interface slippage easily occurs under shear loads.

The application discloses a kind of laminated composite intercalation repair methods, belong to laminated composite maintenance technical field.The application uses the way of multilayer intercalation reinforcement patch, significantly increase the bonding area of patch and original laminated laminated composite material, can effectively improve the bonding strength of repair area, so that repair area will not become laminated laminated composite material / member dangerous area;The bonding surface is composed of multiple planes, and adjacent bonding surfaces bear tensile or shear load respectively, and after debonding or damage of a certain bonding surface, the crack will not spread to other bonding surfaces, significantly enhance the damage tolerance of repair bonding area, and further improve the mechanical properties of repair material / member.

The application provides a rock mass weak layer original state solution modification test device and method, which comprises a normal load system for applying a normal stress to a weak layer to be tested, a solution modification system for modifying the weak layer to be tested, a shear load system for applying a shear stress to the weak layer to be tested, and an observation system for observing deformation data in a test process; the normal load system is connected with a rock mass above the weak layer to be tested to simulate an in-situ stress state, the solution modification system is arranged around the weak layer to be tested to realize solution wrapping modification, the shear load system is connected with the weak layer to be tested on a side to carry out a shear mechanical test, and the observation system is arranged corresponding to the weak layer to be tested to collect deformation parameters. The application can carry out the weak layer original state solution modification test, and accurately obtains an influence mechanism of the solution modification on mechanical properties of the weak layer through the shear test.

The application provides an analysis method and system for nail group shear margin. The analysis method comprises: obtaining feature information corresponding to a nail group and initial shear load of each fastener; calculating shear margin of each fastener by distribution iteration one by one based on the feature information and the initial shear load; when there is a fastener with negative shear margin, removing the fastener with negative shear margin from the nail group, re-distributing the overload of the removed fastener to the remaining fasteners, repeating the distribution iteration until a termination condition is met; in response to the termination condition, determining the positive and negative of the shear margin of the current nail group, and determining a scaling coefficient of the initial shear load according to the positive and negative; and gradually scaling the initial shear load based on the scaling coefficient, performing the distribution iteration after each scaling until the positive and negative of the shear margin of the current nail group output by the distribution iteration is reversed and the scaling coefficient meets a preset precision requirement, and determining the shear margin of the nail group according to the scaling coefficient.

This invention discloses a method for calculating the critical preload margin of bolts under external loads. The method includes establishing a finite element model of an assembly connected by bolts and setting contact relationships and constraints; applying an external load to the finite element model and solving it to obtain the bolt working load; extracting the force values ​​in the x, y, and z directions at the contact position between the bolt head and the clamping element from the bolt working load; and calculating the shear load and axial load of the bolt working load using these force values; and calculating the critical preload margin required to ensure the clamping element does not separate using the shear load and axial load. This invention, through the contact settings used in finite element analysis, can obtain the actual working load borne by the bolt according to different external loads, and then evaluate the minimum bolt preload force required to prevent the clamping element from separating, i.e., the critical preload margin. This critical preload margin can then be used to guide bolt selection, safety assessment, and product optimization design.

This application relates to a two-stage energy-dissipating spring-loaded metal damper, comprising at least one first-stage steel plate deformation energy-dissipating component and at least one second-stage steel plate deformation energy-dissipating component. The components are arranged side-by-side and integrated into a single module with a detachable cover and base. The upper and lower ends of the energy-dissipating steel plate of the first-stage component are fixedly connected to a first connecting unit and a second connecting unit, respectively. The lower end of the energy-dissipating steel plate of the second-stage component is fixedly connected to the second connecting unit, and the upper end is connected to the first connecting unit via the spring-loaded energy-dissipating component. The spring-loaded energy-dissipating component includes a limiting plate, a limiting groove, a movable bolt, a spring, and a locking plate formed on the first connecting unit. The movable bolt passes longitudinally through all the limiting grooves in the same second-stage component, and the spring clamps it in the middle of the limiting groove. When the displacement reaches a preset threshold, the movable bolt deflects and passes over the locking plate. The spring rebounds, causing the locking plate to enter the limiting groove and lock the bolt at its end. The bolt makes close contact with the wall of the limiting groove, transmitting shear load and achieving second-stage energy dissipation. This invention features clear stages, reliable triggering, firm locking, and easy disassembly and maintenance.

This invention relates to the field of mining equipment technology, specifically to a hydraulic support lateral movement platform. The platform includes a base plate located at the working face inside the mine, and a translation unit. The base plate is equipped with a translation unit for moving the hydraulic support to be installed from the working face to the installation location. A fixing unit is also provided on the translation unit for securing the moving hydraulic support. An auxiliary movement unit is also provided on the translation unit to prevent excessive shear load on the translation unit. This invention utilizes the coordinated movement of hydraulic cylinders and slide rails, with the top plate sliding based on the base plate. This allows the hydraulic support to be installed to slide smoothly and safely from the working face to the installation location on the top plate. Jacks and limit blocks on the top plate stably fix the hydraulic support on the top plate during its movement, further ensuring the safety and stability of the hydraulic support's movement and transportation.

A wireline cutting tool. The wireline cutting tool comprises an elongated tubular body. A knife housing resides within the tubular body proximate an upper end, while a plunger resides within the tubular body proximate a lower end. An electric wireline passes through a bore of the knife housing and the plunger en route to an electrical connection sub. The electrical connection sub includes a pin that transmits signals from the electric wireline down to a downhole tool. The plunger is configured to slide up the bore of the lower sub in response to a first upward shear load applied by the wireline. This causes the plunger to act against knives residing within the knife housing. The knives are configured to travel up the bore of the upper sub in response to a second upward shear load applied by the plunger, pinching the wireline until severed. The second shear load is greater than the first shear load, creating a two-stage cutting tool.

The application discloses a rock-concrete interface dynamic shearing testing device and a testing method thereof, and belongs to the field of rock mechanics and rock engineering. The device comprises a dynamic shearing loading mechanism, a seepage loading mechanism, and a data acquisition mechanism. The dynamic shearing loading mechanism comprises a power assembly, an incident rod, a transmission rod and a buffer device. The incident rod is movably sleeved with the incident sleeve at one end, and the incident sleeve and the transmission sleeve are respectively abutted with two sides of a sample to clamp the sample. The transmission rod is fixedly sleeved with the transmission sleeve at one end, and the transmission sleeve is provided with a cavity near one end of the sample. The water outlet end of the water injection assembly is connected with the transmission sleeve, water is applied to the end face of the sample near the transmission sleeve, the water inlet end of the water injection assembly is connected with the incident sleeve, and the water passing through the sample is recycled. The device can test the mechanical properties of the rock-concrete interface under the coupling conditions of confining pressure, seepage and dynamic shearing, so that the actual stress state of the interface under a complex environment can be simulated.

The present application relates to the technical field of H-type vertical axis wind turbine blade, and particularly relates to a blade structure of an H-type vertical axis wind turbine which is formed by compounding a once-pultruded carbon fiber core material with other carbon fiber materials.1. The present application can improve the structural strength of the vertical axis wind turbine blade and solve the problem of fatigue fracture of the vertical axis wind turbine blade.2. The present application effectively utilizes the advantages of the carbon fiber pultrusion process, greatly improves the tensile properties in the length direction of the blade, and combines the core material and the composite material skin to improve the stiffness in the remaining directions of the blade.3. The carbon fiber pultruded plate and the carbon fiber fabric are laminated and combined to manufacture the blade contour; the core material used has high shear strength and compression stiffness; and the blade synthesized with other materials can effectively prevent buckling and resist planar shear load.4. The carbon fiber composite material blade structure of the H-type vertical axis wind turbine can not only improve the impact resistance and stability of the blade, but also focuses on solving the weight of the blade, reduces the weight of the wind wheel, and makes a major change to the structure.5. The light-weight carbon fiber composite material blade and the wind turbine blade structure can reduce the weight of the wind wheel by 70-80% compared with the traditional aluminum alloy blade, greatly reduce the weight of the blade, and have light weight, high strength, and long product life cycle.

The application provides a rock mass weak layer original state solution modification test device and method, which comprises a normal load system for applying a normal stress to a weak layer to be tested, a solution modification system for modifying the weak layer to be tested, a shear load system for applying a shear stress to the weak layer to be tested, and an observation system for observing deformation data in a test process; the normal load system is connected with a rock mass above the weak layer to be tested to simulate an in-situ stress state, the solution modification system is arranged around the weak layer to be tested to realize solution wrapping modification, the shear load system is connected with the weak layer to be tested on a side to carry out a shear mechanical test, and the observation system is arranged corresponding to the weak layer to be tested to collect deformation parameters. The application can carry out the weak layer original state solution modification test, and accurately obtains an influence mechanism of the solution modification on mechanical properties of the weak layer through the shear test.

This invention relates to the field of crushing and processing technology, specifically to a crushing and processing equipment and method for recycling agricultural product processing by-products, including a coarse crushing unit, an axial separating unit, and a fine crushing unit. The coarse crushing unit is used to cut rod-shaped by-products into small cylindrical segments. The axial separating unit includes a frame guide separating tooth assembly and two sets of adaptive clamping separating components. The two sets of adaptive clamping separating components can elastically and adaptively adjust their spacing in the horizontal direction and simultaneously apply a downward clamping and conveying force to the small cylindrical segments, cooperating with the guide separating tooth assembly to separate the small cylindrical segments into two halves along their axial symmetry plane. The fine crushing unit is used to finely crush the separated semi-cylindrical materials. This invention achieves the splitting of small cylindrical segments along their axial symmetry plane through a vertical layered layout and the coordinated work of the coarse crushing unit, the axial separating unit, and the fine crushing unit, thereby reducing the shear load on the fine crushing unit.

The present application provides a kind of explosive ignition critical load test system and method under punch-shear effect, comprising: in loading punch-shear loading device, by guide rod impact explosive sample, and by knock column to receive the load effect of explosive sample;In ignition critical load test system, according to the signal of guide rod and knock column collected by strain gauge, strain voltage signal is obtained by signal acquisition system;In explosive ignition observation system, by observation device and speed measuring device, ignition image and guide rod impact velocity are collected, according to ignition image and guide rod impact velocity, ignition critical velocity is obtained, corresponding critical strain voltage signal is obtained according to ignition critical velocity, and explosive ignition critical load is obtained according to critical strain voltage signal.The above technical scheme is used, and the coupling loading of punch and shear load is realized, and the pressure shear ratio is controllable and adjustable, so that explosive ignition critical load test under punch-shear load effect can achieve accurate effect.

The utility model relates to a kind of wing surface connecting structure based on rib butt joint, for airplane, comprising: left wing rib, right wing rib, butt plate and connecting piece, wherein, left wing rib and right wing rib are fixed by butt plate and connecting piece, the left wing rib and right wing rib are provided with recess or slide rail on opposite face, wherein, recess or slide rail is arranged in the upper edge and lower edge of the opposite face of left wing rib and right wing rib;Ear piece is provided between the upper edge and lower edge of left wing rib.This structure has the characteristics of easy disassembly and reassembly, and has high bending moment transmission efficiency.Slide rail and recess are arranged on two end ribs respectively, sliding mutual cooperation installation is realized, wing surface bending moment is transmitted, and ear piece is arranged in the height direction of web, wing surface shear load is transmitted.The design of end rib is based on wing surface airfoil, and high load transmission efficiency can be achieved, which is suitable for the connection structure design of small airplane wing surface.

This invention discloses a wet-dry cycle-shear coupled secondary sample preparation device and testing method. The device includes a shear system, a wet-dry cycle system, and a support structure. The shear system is used to apply horizontal shear loads and normal loads, the wet-dry cycle system is used to synchronously control the wetting and drying process of the original ring sample, and the support structure is used to fix the overall device. The testing method includes secondary coupled sample preparation and direct shear test. The secondary coupled sample preparation forms a preset shear surface through the coupling effect of wet-dry cycle and shear stress. The direct shear test measures soil strength parameters under multiple working conditions and analyzes the strength evolution law. This invention solves the problem that existing technologies cannot synchronously control the wet and dry state of secondary processed samples during shearing, realizes real-time coupling of wet-dry cycle and shear load, realistically simulates the actual stress state of expansive soil slopes, overcomes the limitations of in-situ sampling and single wet-dry cycle test, and provides a reliable test platform for long-term stability evaluation of expansive soil slopes.

This invention discloses a multidimensional hybrid experimental loading platform for vibration isolation device experiments, comprising a frame, a drive assembly, and a controller. The drive assembly includes a driver and a bracket with force application directions spatially orthogonal to each other. A driver positioned along a first direction drives the corresponding bracket to slide along the frame; a driver positioned along a second direction drives the corresponding bracket to slide along the bracket driven by the driver positioned in the first direction; and a driver positioned along a third direction drives the corresponding bracket to slide along the frame. The workpiece to be tested is clamped between the brackets driven by the drivers positioned in the second and third directions. The drivers positioned in the first and second directions work together to subject the workpiece to shear loads, while the driver positioned in the third direction subjects the workpiece to compressive loads. This multidimensional hybrid experimental loading platform for vibration isolation device experiments has the beneficial effect of simulating various vibration isolation stress conditions.

The application provides a method for determining the shear bearing capacity of a complexly doped solid waste concrete beam, and relates to the technical field of bridge and culvert engineering in the transportation industry. The method can effectively measure the shear bearing capacity of the concrete under controlled experimental conditions by preparing a plurality of proportioned concrete beam samples and applying a systematic incremental shear load, can establish a dynamic model between the performance and construction behavior of the concrete by recording and analyzing the state of the cracks during the loading process, and can further optimize the proportion selection of the concrete by selecting the sample with the shear bearing capacity exceeding the expected value and optimizing the crack change trend.

This invention provides a mineral compression-shear testing system and method at the microscale of rock. The system includes a holding mechanism, a normal loading component, a tangential loading component, and an image acquisition system. When the normal loading component is loaded, the rock thin-slice specimen held by the holding mechanism is pressed against the output end of the tangential loading component, thereby applying a shear load to the rock thin-slice specimen under constant normal stress. The image acquisition system is positioned facing the principal plane of the rock thin-slice specimen and is used to acquire, at least, a time-series image of the microcracks initiating at a pre-fabricated notch in the rock thin-slice specimen during the compression-shear test. The pre-fabricated notch is pre-drilled in the rock thin-slice specimen before the compression-shear test to form a controllable crack initiation location for observation. This invention, through independently decoupled normal and tangential loading components, achieves stable and repeatable observation of the entire process of shear loading and failure of rock thin-slice specimens under constant normal stress at the microscale.

The application discloses a kind of super-large tonnage swivel bridge bracket node strength detection equipment, it is related to swivel bridge bracket node detection technical field, including rack, synchronous trigger mechanism and load applying mechanism are arranged on rack;Synchronous trigger mechanism is used to trigger load applying mechanism movement, to realize simultaneously to bracket node workpiece Apply pressure, bending moment and shear load.The application is provided by setting synchronous trigger mechanism and load applying mechanism, and each load applying mechanism is provided with stable high-pressure oil by high-pressure oil pump, after receiving trigger instruction, three-way synchronous valve is opened to each output end simultaneously, high-pressure oil is distributed and transported to vertical pressure mechanism, lateral eccentric bending moment applying mechanism and horizontal shear applying mechanism simultaneously, the synchronous trigger of three-way load applying mechanism and simultaneous force exertion are realized;Further realized the synchronous exertion of pressure, bending and shear three-way load consistent with actual construction, make the simulation stress path of bracket node workpiece and actual stress path highly consistent.

This invention discloses a novel composite column consisting of a GFRP pipe-concrete-sandwich composite pipe and its preparation method, specifically relating to the field of building engineering technology. The column comprises an outer GFRP pipe, a sandwich composite pipe, and ECC concrete. The ECC concrete exhibits excellent mechanical properties and high ductility under tensile and shear loads, effectively enhancing the seismic resistance of the component. The sandwich composite pipe, composed of high-performance grouting material and thin-walled steel pipe, possesses outstanding compressive strength, providing axial force and working with the GFRP pipe to constrain the lateral deformation of the concrete. The ECC concrete also possesses good ductility and crack resistance, further enhancing the overall structural toughness. Integrating the advantages of ECC concrete, the sandwich composite pipe, and the GFRP pipe, its seismic performance is significantly superior to traditional components. Its synergistic effect of compressive strength, constraint, and ductility allows it to maintain stable performance even in corrosive environments with high salinity and humidity, effectively solving the corrosion problem of steel-concrete composite components.

A cap is provided that is designed to facilitate the guidance of one or simultaneously more elongated elements, such as cables, hoses or conduits, which can be at least partially loaded in shear, through a hose, pipe or duct. The cap has an elongated sleeve-shaped section and a closed and at least externally rounded head section. The sleeve-shaped section and the head section have an inner wall defining a cavity that is open on a side opposite the head section. The cavity has a clamping section in which the cross-section of the inner wall tapers toward the head section. The cross-section of the cavity widens in a step-like manner at the end of the clamping section where this section is at its smallest diameter. This forms a circumferential clamping edge at which the elongated elements jam when they are inserted into the cavity.

This invention discloses a wind turbine low-headroom safety control method based on blade root load negative shear characteristics. The method includes: real-time acquisition of load data in the blade root flapping direction of three blades using load sensors; acquisition of wind speed, rotational speed, and power data of the wind turbine; acquisition of the impeller azimuth angle; calculation of blade negative shear load and overall impeller negative shear load; three-level risk classification based on the negative shear load of each blade, the overall impeller negative shear load, and their historical load trends; and control of the pitch angle actuator to reduce the negative shear load and avoid tower sweep risk. This invention, by monitoring the blade root flapping direction load of the three blades and dividing the turbine into upper and lower halves by the impeller azimuth angle, can accurately identify the negative shear load state and implement graded control. This method can be adapted to different turbine models and installation scenarios, thereby avoiding tower sweep risk and protecting critical components of the unit.

The utility model relates to loom heald frame crossbeam technical field, specifically disclose a kind of high-strength loom heald frame alloy crossbeam, comprising: crossbeam body, the both ends end of crossbeam body is connected with side stop, the both ends end of crossbeam body is fixedly provided with mounting block, the both ends end of side stop is fixedly provided with connecting block, the cross section of connecting block is T-shaped and is arranged, the connecting groove that is compatible with connecting block is set in the outside wall of mounting block, and the connecting block is set in connecting groove;The utility model is through the cooperation of connecting block and connecting groove, first shear load between crossbeam body and side stop is transferred to T-shaped key surface, then the radial compression of connecting block is carried out using the anti-skid pad in two groups of symmetrical clamping mechanism, so that fixed bolt only receives pure axial tension, to be still able to keep stable for a long time under high-speed reciprocating vibration environment, avoid bolt loosening, so that heald frame easily become loose, guarantee the use effect of heald frame.