336 results about "Shear stress" patented technology

The invention belongs to the technical field of direct shear-seepage tests of rock joints, and discloses a numerical test method for direct shear-seepage of rock joints under different boundary conditions, which comprises the following steps of: establishing a joint surface numerical model by using finite element software, and performing tests for simulating joint shear mechanical behaviors by applying different boundary conditions. And the contact state and the opening distribution of the joint surface under different shear displacements are obtained, so that the shear stress evolution mechanism of the joint surface is better revealed, and the mechanical behavior of the rough joint surface in the shear process is accurately expressed. According to the method, the evolution law of mechanical properties in the joint shearing process can be reflected, the influence of shearing deformation on the joint seepage characteristics can be reflected, joint opening data distribution is imported into programming software to be processed, a joint seepage numerical model is constructed, then multi-physics field simulation analysis software is imported, and the joint seepage performance is improved. The flow velocity, the osmotic pressure and the streamline distribution characteristics in the flowing process are calculated, so that the joint permeability characteristics are analyzed.

The invention discloses a gear pair life prediction method based on dynamic stress, belongs to the technical field of reliability design of mechanical transmission systems, and aims to solve the problem of inaccurate life prediction caused by neglecting a dynamic effect and a real surface topography in an existing gear design method. The method comprises the following steps: firstly, acquiring gear pair interface mechanical property parameters considering shafting vibration, dynamic load and surface roughness, wherein the parameters comprise transient oil film pressure, friction coefficient, oil film thickness and shear stress; solving a three-dimensional subsurface stress field by adopting an algorithm and calculating von Mises equivalent stress distribution; stress volume integration is conducted on different rough surfaces, the honed surface is used as the reference, the relative fatigue life of other surfaces is calculated based on the Zaretsky life prediction theory, and accurate prediction and process optimization of the contact fatigue life are achieved; meanwhile, the dynamic bending stress of the tooth root is calculated based on the dynamic normal load, and the bending fatigue safety coefficient is checked.

The invention relates to the technical field of material layer automatic control, and discloses a silo intelligent storage control system, which comprises a data acquisition module for acquiring and preprocessing silo data through multiple types of sensors; the data analysis module is used for calculating to obtain a state evaluation parameter set; the intelligent decision-making module determines an early warning level through a double-threshold early warning mechanism, and obtains a control decision-making parameter set based on the state evaluation parameter set and the early warning level; and the execution control module is used for executing the control decision parameter set. According to the method, the silo space is discretized into the three-dimensional voxel grid, accurate three-dimensional description of the material distribution state is achieved, the shear stress of each voxel is calculated on the basis of fused data such as the material level height and the pressure difference, the flow state of each voxel is accurately judged by comparing the shear stress with the yield threshold value, and the flow state of each voxel is accurately judged. Scientific basis is provided for making a discharging strategy, blind operation is avoided, quantitative evaluation of the silo operation risk is achieved, and scientific basis is provided for preventive maintenance.

The invention provides a shale reservoir hydraulic fracturing wellbore casing deformation risk judgment method which comprises the steps that geological parameters and principal stress of a target area are obtained, and the principal stress comprises horizontal principal stress, maximum principal stress and vertical principal stress. And determining an included angle between the fault plane and the hydraulic fracture plane according to the normal vector of the fault plane and the normal vector of the hydraulic fracture plane. And calculating by substituting the geological parameters, the principal stress and the included angle into an established stress calculation model of the fault plane to obtain shear stress and normal stress of the fault plane in the target area. And calculating by substituting the shear stress and the normal stress into the established displacement component calculation model to obtain the slip component of the fault plane in the target area. And performing safety early warning based on the risk level. The fault slip amount is calculated by accurately identifying the stratum physical property parameters and the fault structure, so that the casing deformation risk is judged.

The invention discloses an aerodynamic load determination method and device of a train and the train, and relates to the field of aerodynamics. The method comprises the steps that geometric shape data of the train with the load to be determined are obtained; inputting the geometric shape data of the train with the to-be-determined load into the prediction model to obtain the pressure and shear stress of the train with the to-be-determined load, which are output by the prediction model; and according to the pressure and the shear stress of the train with the to-be-determined load, determining the resistance, the lift force and the lateral force of the train with the to-be-determined load. The prediction model is trained through the data of the train with the known load, the trained prediction model only needs to input the geometric file of the train object to be calculated, the pressure and the shear stress can be obtained, the threshold in the professional field is not involved, and therefore all workers have the operable ability. Simulation calculation is replaced by the prediction model, the prediction model does not need to be subjected to simulation calculation again, the pressure and the shear stress are directly output, the calculation time is shortened, and the calculation efficiency is improved.

The invention provides a concrete waste crushing particle size distribution analysis method and device, and the method comprises the steps: obtaining concrete waste image data, extracting a particle contour and geometric parameters through image recognition, determining a particle contact point displacement feature, and recognizing a stress concentration region migration path. Obtaining a particle morphology data set containing stress transfer path deflection information; performing gray value processing on the particle surface image, identifying a cement paste stripping area caused by shear stress component change through brightness difference to obtain interface stripping stress state distribution information, and calculating shear breaking ultimate strength distribution characteristics based on stress transfer path deflection information; and fuzzy clustering processing is carried out on the particle data set, if boundary fuzzy particles exist, crushing force transmission characteristics of the boundary fuzzy particles are obtained according to mechanical response time-frequency analysis, and the crushing risk level of the boundary particles is identified in combination with a particle internal crack initiation force threshold.

The invention relates to a turbulence boundary layer inner and outer region normalization method and device and a storage medium. The method comprises the following steps: firstly, determining an outer zone scale based on the thickness of a turbulent boundary layer, time-average axial velocity distribution and edge velocity; and then calculating a local shear stress parameter based on the dynamic viscosity, the local axial velocity gradient and the wall shear stress. And calculating by adopting a set normalization formula to obtain the target speed loss after normalization processing. A local shear stress parameter based on a local axial velocity gradient is introduced, so that the correction force for velocity loss can be enhanced, and the divergence phenomenon of an inner section is effectively inhibited. Meanwhile, the local shear stress parameter of the outer region tends to be a constant due to the stable velocity gradient, and it is ensured that the velocity loss profile of the outer region keeps good self-similarity. Therefore, according to the turbulence boundary layer inner and outer region normalization method, inner region divergence reduction and outer region good self-similarity maintenance can be taken into consideration, so that the normalization precision of the inner and outer regions of the turbulence boundary layer is improved.

The invention relates to a bladed turbomachine assembly extending around an axis of rotation and comprising blades (11a, 11b), each blade (11a, 11b) extending in a radial direction with respect to the axis of rotation up to a heel (14a, 14b), characterized in that it comprises: – an electrically conductive rod (26) which passes through the heels (14a, 14b) of the blades (11a, 11b), this rod (26) being subjected to shear stress if a heel (14a, 14b) shifts along the direction of the axis of rotation relative to another circumferentially adjacent heel (14a, 14b); – detection means connected to the ends of the rod (26) to identify that this rod (26) is broken when it is no longer electrically conductive. Figure for the summary: Figure 8

The invention discloses a high-performance cast cold roll evaluation method based on stress of a working layer and a bonding layer, and belongs to the technical field of metallurgical mechanical equipment design and life evaluation, and the method comprises the following steps: calculating the maximum contact pressure between a working roll and a supporting roll and the flattening width of a contact surface; further determining the maximum shear stress in the working roll and the depth position corresponding to the shear stress; according to radius changes of the working roller in different wear stages, the maximum contact pressure and the contact surface flattening width in different wear stages are calculated for multiple times, and then normal stress at the position of a bonding layer in each stage and shear stress derived from the normal stress are calculated; performing simulation verification on calculation data based on a stress field of finite element simulation; comparing the shear stress of the bonding layer obtained after calculation with the total stress level after the residual stress is considered, and the allowable shear stress of the same material; and the risk is judged. The service life of the roller can be prolonged, and the equipment loss cost of cold-rolled strip steel production is reduced.

The invention provides a method for designing the safety thickness of a rock clamping body in the construction period of an oblique crossing tunnel, and belongs to the technical field of tunnel construction, and the method comprises the following steps: S1, calculating the stress of a rock clamping infinitesimal body in the oblique crossing tunnel; s2, calculating an included angle theta between the position of the infinitesimal body and the axis of the new tunnel; s3, simulating stress distribution of a tunnel bottom surrounding rock plane; s4, determining a shear stress range of an infinitesimal body of the interlaced rock mass; s5, calculating the stress extreme value of the infinitesimal body of the interlaced rock mass; s6, setting basic conditions of the safety thickness of the interlayer rock; and S7, calculating the safety thickness of the sandwiched rock mass by adopting an iteration method. According to the design method for the safety thickness of the rock clamping mass in the construction period of the oblique crossing overpass tunnel, stable operation safety of the existing line tunnel is guaranteed, and meanwhile it is guaranteed that the construction activity of a newly-built tunnel is efficiently promoted in a safe environment.

The application provides a small displacement non-welding shear stress measurement system and method, which comprises a parallel link structure, two probe fixing devices, an external frame and two differential pressure measurement devices; the parallel link structure comprises a top plate, a first target plate, a second target plate, a first bottom fixed plate and a plurality of circular links, the external frame comprises a structural frame, a hollow plate and two transparent acrylic plates, the probe fixing device comprises a displacement sensor with external threads, a first fixed nut, a second fixed nut and a sleeve with internal and external threads, and the two displacement sensors are used for measuring the first displacement of the first target plate in the first horizontal direction and the second displacement of the second target plate in the second horizontal direction respectively. The application simultaneously monitors the displacement of the parallel link structure in two directions by using two displacement sensors, and realizes shear stress measurement when the water flow direction changes.

Provided is a substrate fabrication method allowing for easy separation of a carrier and a device layer. This substrate fabrication method includes: a step for preparing a laminate comprising, in the following order, a release layer and a device layer on a carrier; a step for obtaining a laminate with a resin layer by laminating a curable resin–containing resin layer on the carrier-side surface of the laminate; a step for changing the shape of the carrier or the laminate with a resin layer by subjecting the laminate with a resin layer to a curing treatment of the curable resin to shrink the resin layer, thereby pulling the carrier in a direction that follows the shrinkage of the resin layer; and a step for generating shear stress between the carrier and the device layer by utilizing the shape change of the carrier, thereby releasing the device layer from the laminate with a resin layer at the position of the release layer.

The present application provides a method and apparatus for determining the dimensions of a mandrel, a device, a medium, and a product. The method comprises: establishing a cross-sectional model of a pipe on the basis of dimensions of an initial mold, performing mesh discretization of the cross-sectional model of the pipe, then assigning a shear relaxation modulus function to each mesh cell, and obtaining a viscoelastic model of the pipe; on the basis of an actual stress and an actual temperature field, performing deformation simulation on the viscoelastic model, and obtaining a deformation model of the pipe; and obtaining optimized mandrel dimensions on the basis of a comparison result of the cross-sectional model and the deformation model. In the solution of the present application, the cross-sectional model is established on the basis of dimension requirements of the pipe, the viscoelastic model can characterize the relaxation modulus of the pipe under shear stress, and the environmental conditions of the pipe during a cooling and solidification stage can be extracted using the actual stress and the actual temperature field, thereby improving the accuracy of deformation simulation and mandrel dimension adjustment and accordingly enhancing the anti-sag performance of the pipe.

This invention provides a method for calculating the bearing capacity of tunnel anchors based on the rock mass quality index BQ, comprising the following steps: S1, obtaining the surface and strata conditions of the anchor site area, as well as the structural types of the main cable and tunnel anchor, and establishing a two-dimensional planar model and a three-dimensional spatial model; S2, statistically analyzing the rock strata composition and proportion on the side of the anchor body through model intersection and segmentation; S3, calculating the rock mass quality index BQ and the corrected index CBQ for each rock stratum on the side of the anchor body according to the strata conditions; S4, calculating the comprehensive rock mass quality index KBQ based on the proportion of each rock stratum on the side of the anchor body and the corrected index CBQ, and calculating the shear strength parameter; S5, calculating the allowable pull-out load on the side of the anchor body without through shear or local shear stress failure based on the shape parameters of the anchor body and the shear strength parameter on the side of the anchor body. This invention proposes a method for calculating the allowable pull-out load of tunnel anchors based on the rock mass quality index BQ, which can accurately evaluate the bearing performance of tunnel anchors.

The application discloses a design method of an integrated mechanical model of a compression-resistant composite anti-floating anchor rod, and specifically comprises the following steps: obtaining a parameter set of a multi-layer structure of a target geotechnical engineering anti-floating anchor rod, analyzing the hierarchical interface mechanical behavior, generating an interface shear stress transfer function, embedding the function into an axisymmetric stress analysis framework, obtaining an axial force and a side resistance distribution function of the whole length of the anchor rod, constructing an integrated mechanical balance equation set, segmentally numerically solving the equation set, outputting mechanical response characteristic curves at different depths, and finally determining a limit anti-floating bearing capacity prediction value according to the curves as a design output.

The utility model discloses a device for enhancing the bonding strength between layers of a white board. The device is characterized by further comprising a dynamic pressing mechanism arranged on a rack, after an adhesive is added to the paper layers of the white board paper through the coating device, bubbles retained in the adhesive are discharged by vibrating the paper layers through the arrangement of the eccentric wheel excitation device before a calendaring process, and meanwhile, the permeability of glue can be improved, so that the gluing quality between the paper layers is improved; the phenomena of bubbles, edge warping and the like after the paper layer is bonded are avoided; the pressure of the compression rollers is gradually increased one by one, the pressure of the first compression roller on the paper layer is minimum, and then the pressure is gradually increased one by one, so that the shear stress of the paper layer is reduced, and the uniformity of the adhesive layer is improved; therefore, the bonding strength between the paper layers is enhanced; the heating device is arranged on the pressing roller, heat is transmitted to the paper layer through the roller in the roller pressing process, rapid curing of glue is promoted, and therefore the production speed is increased.

The invention relates to a display panel and a display terminal. The display panel comprises a substrate, a display part and a binding part, wherein the display part comprises a plurality of metal layers and at least one flat layer; the binding part comprises a test terminal, a binding terminal and a first protection part, and the first protection part and a flat layer are arranged on the same layer; the binding terminal comprises a first terminal and a second terminal, the test terminal is located between the first terminal and the second terminal, the first protection part is located between the binding terminal and the test terminal, and the thickness of the first protection part is smaller than that of each flat layer. According to the display panel, the thickness of the first protection part arranged on the same layer is set to be smaller than that of the first flat layer, so that the thickness difference between the first protection part and the film layer below can be reduced, and the shear stress borne by the film layer covering the edge of the first protection part in the binding process is reduced; therefore, the risk that the film layer covering the edge of the first protection part cracks due to overlarge stress is reduced.

The application relates to the technical field of highway and railway bridge design, and discloses a corrugated steel web curved box girder torsional stress analysis method based on prestress effect, which comprises the following steps: S1, determining the mechanical characteristics of the corrugated steel web box girder bridge; S2, performing equivalent load processing on the prestress effect and performing reasonable simplification; S3, establishing a constraint torsion differential equation of the corrugated steel web combined curved box girder to obtain the constraint torsional normal stress and the constraint torsional shear stress of the required section; S4, combining the curved beam boundary conditions, the torsional double moment and the torsional stress formula of the box girder under various load conditions, adopting the initial parameter method to superimpose the boundary conditions into the general solution form of the constraint torsion differential equation of the corrugated steel web combined curved box girder, extracting the calculation data of the torsional stress of the corrugated steel web combined curved box girder, and analyzing to obtain the torsional stress result of the corrugated steel web combined curved box girder. The corrugated steel web curved box girder bridge torsional performance based on the prestress effect is researched by adopting the application.

The invention discloses a dynamic calculation method and device considering wave current-pipeline-seabed coupling and a medium, and belongs to the technical field of dynamic calculation. The method comprises the steps that geometric features and material parameters are defined, and a calculation model is established; the fluid-solid coupling equation and the structural dynamics model are jointly calculated through a CFD solver; starting and stopping of seabed scouring are judged according to the scouring shear stress of fluid to the seabed, the seabed elevation of a scoured area is updated, the gradient of the scoured area is calculated and compared with a silt repose angle, and collapse control and smoothing are conducted on the local gradient of the seabed through comparison; and after seabed local slope collapse control and smoothing are completed, structural vibration response is solved according to the lift force and the drag force of the fluid on the pipeline structure. According to the method, in the synchronous dynamic process of waves, seabed evolution and pipeline vibration, local scour depth evolution and pipeline vibration amplitude can be predicted at the same time, and motion response time histories such as pipeline displacement, speed and stress are stably output.

This invention discloses a method for preparing the ZrS2 monoclinic P21 / m phase via high-pressure shearing, belonging to the field of semiconductor material synthesis and preparation. ZrS2 exists as a trigonal P3m1 phase under normal temperature and pressure. An appropriate amount of ZrS2 P3m1 phase is weighed and placed at the center of the anvil of a double-sided rotating hydraulic press. The original sample is pressurized until the target pressure is reached. Then, the anvil is rotated by a certain angle, applying pressure and shear stress simultaneously. The sample removed after depressurization is the monoclinic P21 / m phase ZrS2. This invention uses high-pressure, high-shear treatment to prepare the ZrS2 monoclinic P21 / m phase while maintaining the same composition. The process can be carried out at room temperature without adding any external additives, and is simple and easy to operate.

The present invention relates to a dispersion comprising i) a dispersant; ii) at least one polythiophene dispersed in the dispersant i); and the Ostwald de l / l / ae / e relationship for the dispersion. T =Ky n The exponent n in the power law is in the range of 0.62 to 0.92. T The present invention relates to a dispersion in which is the shear stress, K is the fluid viscosity constant, Y is the shear rate dy / dt, and the dispersion has a solid content of at least 1.5% by weight based on the total weight of the dispersion. The present invention also relates to a process for preparing a dispersion, a dispersion obtained by the process, a process for preparing a laminate, a laminate obtained by the process, and the use of the dispersion for forming a solid electrolyte layer in a capacitor.

This invention relates to the field of debris flow monitoring and prevention, and specifically to a debris flow prevention device and early warning method with integrated monitoring. The invention includes a force plate, baffles, rigid piles, and an intelligent early warning module. It uses a three-component mechanical sensor and a pore water pressure sensor to monitor in real time, capturing the shear stress, normal stress, and pore water pressure at the bottom of the debris flow, and analyzing the differences in internal stress distribution. A single rigid pile and two baffles constitute a protective unit, deployed along the channel. The cooperation between the force plate and the baffles forms a linkage between monitoring and prevention. When the force plate detects the passage of debris flow, the baffles move upstream to intercept it; when the force plate detects a decrease in debris flow flow, the baffle opening turns downstream for self-cleaning. The intelligent early warning module integrates multi-source sensor data based on 5G communication, and triggers a three-level graded early warning through theoretical quantitative analysis such as corrected Froude numbers and corrected impact loads. This invention achieves coordinated flow perception, graded early warning, and dynamic protection, improving prevention efficiency and early warning accuracy.

The invention relates to the technical field of industrial detection, in particular to a drainage pipe shearing quality detection method and system based on shape recognition. The method comprises the following steps: acquiring a grayscale image of a shear section of a drainage pipe, extracting sub-pixel edge points, constructing a polar coordinate sub-pixel edge sequence containing an original radial distance and a shear phase angle, and calculating a mechanical collapse index; calculating an elastic modal weight and a plastic collapse weight based on the shear phase angle; and acquiring a local curvature and a local gradient distribution standard deviation of the sub-pixel edge points, calculating a theoretical radial distance in combination with an original radial distance, a mechanical collapse index, an elastic modal weight and a plastic collapse weight, further calculating a real diameter and a roundness error of the drainage pipe, and generating an equipment adjustment feedback signal. Through light shape decoupling and rheological compensation mechanisms, the influence of reflective interference and shear stress deformation is effectively inhibited, and high-precision detection of the shear quality of the drainage pipe is realized.

The invention belongs to the technical field of nacelle air inlet duct resistance reduction, and relates to a nacelle air inlet duct resistance reduction structure and method.The nacelle air inlet duct resistance reduction structure comprises an inner annular flexible film section embedded in the inner wall of a nacelle air inlet duct, and the front edge and the rear edge of the inner annular flexible film section are in sealed connection with adjacent inner wall steps through bonding layers; the outer annular flexible film section is embedded in the outer wall of the nacelle air inlet channel, and the front edge and the rear edge of the outer annular flexible film section are in sealed connection with the adjacent outer wall steps through bonding layers respectively; under the action of aerodynamic load, the flow velocity gradient and the adverse pressure gradient of a near-wall area of the surface are passively adjusted through the structural flexibility and deformation response of different positions of the surface of the inner and / or outer annular flexible film section, so that the shear stress and friction resistance of airflow to the surface are reduced.

The application particularly relates to a cast stainless steel multiaxial low-cycle fatigue prediction method, which comprises the following steps: measuring or calculating the axial strain amplitude and the corresponding axial stress, the shear strain amplitude and the corresponding shear stress, and the phase difference between the axial strain amplitude and the shear strain amplitude of a cast stainless steel concerned part; calculating the equivalent axial strain amplitude and the equivalent shear strain amplitude of the cast stainless steel concerned part after correction and containing the influence of thermal aging; and substituting the equivalent axial strain amplitude and the equivalent shear strain amplitude of the cast stainless steel concerned part after correction and containing the influence of thermal aging and the phase difference therebetween into a cast stainless steel multiaxial low-cycle fatigue prediction model containing the influence of thermal aging to calculate the multiaxial low-cycle fatigue life and the fatigue crack direction of the cast stainless steel after thermal aging. The cast stainless steel multiaxial low-cycle fatigue prediction method can accurately predict the fatigue life of the cast stainless steel under multiaxial low-cycle fatigue loading and the direction of fatigue crack initiation and initial propagation.

The present application relates to a kind of lightweight biomimetic discontinuous fiber spiral composite protective structure, belong to lightweight protective structure design technical field.The lightweight high-strength high-toughness biomimetic discontinuous fiber spiral composite protective structure of the present application is stacked by unit intermittent fiber fabric according to different arrangement angles and arrangement ways, under the condition of local stress concentration in relaxation layer, shear stress is distributed to the intermittent connecting part in each layer, the concentration of interlaminar shear stress is relieved, using the interlaminar shear stress distribution mechanism of the composite material makes crack frequently deflect when it bears load, can delay material failure and destruction, greatly improve the bearing and energy absorption capacity of the composite protective structure.

The present application relates to the technical field of digital twinning of hydraulic engineering, and more particularly to a digital twinning automatic construction method for hydraulic engineering. The method comprises the following steps: partition monitoring and multi-level sampling of the hydraulic engineering construction area to obtain a multi-level hydrodynamic data set; constructing a hydrodynamic vector field using the multi-level hydrodynamic data set; constructing a triangular monitoring area through the hydrodynamic vector field; calculating the area average vorticity of the triangular monitoring area and analyzing the flow velocity vector at the three corner vertices of the triangular monitoring area to obtain a local vorticity distribution map; determining the shear stress distribution map around the construction equipment according to the local vorticity distribution map; determining the influence range on the construction equipment according to the shear stress distribution map to form a multi-parameter influence radius table. The present application realizes real-time two-way coupling analysis of the hydrodynamic environment and construction activities through digital twinning technology of hydraulic engineering, providing efficient and accurate technical support for automatic construction of hydraulic engineering.

The application provides an intelligent rock-soil in-hole shear instrument and a use method, and relates to the technical field of stress testing. The shear instrument is provided with an intelligent walking mechanism, and a front-end walking mechanism and a rear-end walking mechanism are arranged for the movement of the shear instrument in a borehole, so that the installation position can be accurately positioned in the borehole. A front-end shear mechanism and a rear-end shear mechanism apply a normal stress to the surrounding rock of the borehole, and a shear force loading mechanism applies a shear stress to the surrounding rock of the borehole. The shear instrument can directly perform a shear test on the rock mass in the borehole, so that the distortion of the rock mass strength parameters caused by stress release, structure disturbance and other factors in the process of taking the rock sample from the underground is avoided. In addition, the structure of the shear instrument has stronger adaptability to the complex underground environment, the mechanical response information of the rock mass at different positions can be more comprehensively obtained, and the accuracy and reliability of the test results are improved.

The invention relates to the technical field of single crystal growth, and discloses an integrated process method for purifying germanium from zinc leaching residues and pulling a single crystal, which comprises the following steps: periodically executing a stable growth period and a transient disturbance period in an equal-diameter growth period, and monitoring a driving torque signal in the stable period; the disturbance period is triggered by duration or torque drift, and transient torsional shear stress is induced on the solid-liquid interface and an impurity boundary layer is damaged by controlling the rotating speed of the crystal and the rotating speed of the crucible in a coupling mode at the same time and changing the relative angular speed of the crystal and the rotating speed of the crucible at the same time. Targeted efficient removal of an impurity boundary layer is achieved, and violent disturbance to a melt body is avoided.

The invention belongs to the technical field of double-configuration structure magnesium alloys, and particularly relates to a processing method for preparing a double-configuration structure high-toughness magnesium alloy through gradient differential temperature extrusion. According to the method, gradient temperature regulation and control are adopted to achieve the extrusion process of variable-temperature extrusion, the temperature in an extrusion cavity is gradually reduced from front to back, the temperature gradient is formed, and differential-temperature extrusion is achieved. In the asymmetric extrusion process, the upper and lower surfaces of an alloy blank have different flow velocities when passing through a runner, so that a flow velocity difference is generated. The generation of the flow velocity difference leads to the introduction of additional asymmetric shear stress in the thickness direction of the die, so that the extruded profile grains are effectively refined, and the grain size presents a double-configuration structure. The prepared profile is excellent in performance, the current situation that the structure of the extruded profile is not uniform is effectively improved, and meanwhile the product quality can be greatly improved.