386 results about "Deformation mechanism" patented technology

The invention is suitable for the technical field of earth surface monitoring, and provides an earth surface deformation monitoring method and system based on a time sequence InSAR, and the method comprises the following steps: carrying out the SAR image screening and interferogram generation, and collecting corresponding meteorological data and thermal infrared data; performing space-time adaptive atmospheric phase correction, taking the air pressure vertical gradient and the temperature anomaly as driving factors of atmospheric delay, and separating an atmospheric phase through a space-time weighted model; dynamic deformation modeling is carried out, and deformation is decomposed into linear deformation and nonlinear deformation; the method comprises the following steps: taking a mining area road network as a geometric constraint, unwrapping a coherent region by adopting a minimum cost flow algorithm, converting an unwrapping phase into sight-line-direction deformation, and calculating horizontal and vertical deformation components in combination with InSAR sight-line-direction deformation and a digital elevation model. The method adapts to a complex deformation mechanism of a mining area by capturing linear and nonlinear deformation. Through sight line deformation and DEM geometric projection, vertical and horizontal deformation separation is realized, and the deformation direction is determined.

The invention relates to a multi-process forming judgment method based on two-way tensile limit strain, which comprises the following steps: on the basis of a deformation mechanism experienced during material forming, associating complex loading characteristics of a two-way tensile test with a complex deformation process of a part, and analyzing the loading history of a plate by utilizing a method of combining the test and simulation; the limit strain of the material in different deformation directions at different stages is ingeniously obtained, so that the forming result of the material is accurately judged; the method can ensure that the limit strain of the sheet cannot be influenced by bending stress and friction force, overcomes the technical problem that the existing method cannot meet the multi-process forming judgment of parts, greatly improves the accuracy and effectiveness of forming simulation analysis, is particularly suitable for occasions of multi-process forming analysis of metal sheet materials, and has wide application prospects. And the application requirements of engineering practice and scientific research work are widely met.

The invention discloses a foundation pit high-performance mobilization strength design method and system. The method comprises the steps that S1, wall deformation is decomposed into deformation mechanism superposition of different shapes; s2, calculating soil body strains corresponding to different shape deformation mechanisms; s3, superposing the soil body strain corresponding to different shape deformation mechanisms, and determining the total shear strain of the soil body; s4, calculating soil mass mobilization shear stress according to an assumed soil pressure mobilization mechanism; s5, calculating horizontal soil pressure according to the soil mass mobilization shear stress; and S6, numerical integration is conducted on the horizontal soil pressure twice, bending moment caused by the supporting load is added, and the structural bending moment applied to the wall is obtained. The technical problem that in the prior art, errors are caused to foundation pit deformation design due to the fact that soil mobilization strength is ignored is solved, and the technical effects that the soil mobilization strength is considered, and wall deformation and stress can be rapidly calculated only through a simple constitutive model are achieved.

The invention discloses an aging deformation mechanism analysis method for large-scale excavation of a high slope under an ultra-deep unloading condition, belongs to the technical field of reservoir bank slope deformation analysis, and obtains key parameters such as the volume, the sliding direction and the water level change of an accumulation body by integrating technical means such as geological exploration, hydrological monitoring and displacement measurement. By utilizing the parameters, a slope stability index, an energy function and a water-force coupling equation are constructed, and a set of complete analysis system is formed. According to the method, the accuracy and the real-time performance of slope stability evaluation are improved, and deep understanding of a slope deformation mechanism is realized through numerical simulation and an optimization algorithm. In addition, the scheme also provides prevention and control measures based on an evaluation result, and active prevention of risk management is realized. Through application of the scheme, the safety and management efficiency of the reservoir bank slope can be remarkably improved, and powerful support is provided for sustainable development of hydropower engineering.

The invention provides a sedimentation inversion prediction method based on water-soil coupling and well reservoir dynamic feedback, which comprises the following steps: by collecting geological, hydrological, deformation monitoring and engineering construction data, constructing a three-dimensional geologic model containing a shallow unconsolidated formation and an underlying bedrock layer, and setting physical boundary constraints; establishing a water-soil bidirectional coupling model, integrating a seepage model and a deformation model, and realizing bidirectional coupling through a dynamic feedback mechanism; calculating the leakage / extraction amount based on the dynamic water level in the well and the hydraulic long pipe model, dividing the layer leakage amount and feeding back the layer leakage amount to the seepage model; model parameters are inversed and calibrated in combination with actually measured data; and finally, predicting a settlement spatio-temporal evolution process based on the calibration model, and generating a risk prevention and control scheme in combination with building settlement indexes. The method has the advantages that comprehensive information is obtained through multi-source data fusion, the deformation mechanism model considering the water-soil bidirectional coupling and the well storage effect is established, and the defects in multi-factor coupling, boundary condition processing and parameter inversion in the prior art are overcome.

The invention discloses a reservoir bank landslide deformation mechanism analysis method in combination with InSAR deformation characteristics and fluid-solid coupling, and the analysis method comprises the steps: firstly, recovering a deformation field of a reservoir bank landslide through employing a multi-temporal InSAR, and carrying out the induction factor analysis of a deformation independent component in combination with an ICA method; secondly, the saturated permeability coefficient of the slip mass material is corrected in an auxiliary mode based on the InSAR deformation time sequence; then, a seepage analysis result is coupled to an FLAC3D model for stress-strain analysis; and finally, revealing the deformation mechanism of the reservoir bank landslide based on InSAR deformation spatio-temporal evolution characteristics and a fluid-solid coupling analysis result. According to the reservoir bank landslide deformation mechanism analysis method, reservoir bank landslide InSAR deformation spatio-temporal evolution, one-dimensional pore water diffusion model auxiliary correction saturated permeability coefficient and coupling pore pressure stress analysis are carried out aiming at the limitation of InSAR and a numerical simulation technology in the reservoir bank landslide deformation problem.

The invention discloses a multi-scale strain measurement method for a metal material at an ultralow temperature, and the method combines a DIC technology and HR-EBSD analysis, and achieves the precise strain measurement from a macro scale to a micro scale. Macroscopic strain distribution on the surface of a sample is accurately captured through a DIC technology, and HR-EBSD analysis is utilized to further go deep into a microscopic level, so that a microscopic deformation mechanism of a material in an ultralow-temperature environment is disclosed. The overall strain of the material is researched from the macroscopic perspective, the specific region of interest in the macroscopic strain state is further deepened, the microscopic strain distribution of the region of interest is explored, and the deformation behavior and the mechanical property of the material at the ultralow temperature can be more comprehensively understood. Besides, a non-direct contact type heat exchange mode is adopted, so that accurate temperature control is realized, and meanwhile, the influence of water mist or condensation and the like generated by evaporation and condensation of a cooling medium on a test result is avoided.

The invention discloses a multi-structure novel auxetic metamaterial replaceable energy dissipation metal damper, and relates to the technical field of anti-seismic equipment, the multi-structure novel auxetic metamaterial replaceable energy dissipation metal damper comprises a fixing seat, through the fixing seat, plate-shaped auxetic supporting and columnar double-deformation mechanism novel auxetic metamaterial double structures are used for energy dissipation at the same time, so that the anti-seismic function is achieved; the building can be dynamically protected under the earthquake vibration impact effect; the modular replaceable energy consumption core body design is adopted, and quick disassembly and replacement of damaged components are achieved through the assembly type design; meanwhile, a self-adaptive displacement compensation structure is combined, and the stability of the main body structure is maintained in the continuous energy consumption process; according to the device, the anti-seismic reliability of a building structure in the whole life cycle is remarkably improved, the later operation cost is reduced through the maintenance-friendly design, and all-around performance optimization from earthquake protection to daily maintenance is achieved.

The invention relates to the technical field of seepage deformation and hydrodynamic erosion, and discloses an accumulation body risk assessment method and system based on a seepage deformation mechanism, and the method comprises the steps: measuring the loss of particles in an accumulation body and the seepage flow change through a slip band seepage erosion test, and constructing a hydrodynamic erosion constitutive model; carrying out numerical simulation through a particle discrete element and computational fluid dynamics method, and establishing a numerical calculation model of the typical landslide accumulation body; and analyzing seepage deformation of the accumulation body under the action of the variable water head, and evaluating the stability of the accumulation body. The method can solve the problem of risk assessment and management of the landslide accumulation body under the action of dynamic hydrodynamic load, especially how to effectively assess the stability of the accumulation body and take protective measures in time under complex hydrogeological conditions, so as to ensure the engineering safety.

The invention discloses a low-temperature titanium alloy material and a preparation method, the low-temperature titanium alloy material is an alpha + beta type two-phase titanium alloy, an alpha stable element (Al), a beta stable element (Mo / Nb / V) and a neutral element (Zr) are used as main composition elements, and the content (O) of interstitial elements is controlled. The influence mechanism of each component element on the low-temperature mechanical property and the low-temperature deformation mechanism is determined, so that the mass percentage content of each component and the interstitial element content are accurately controlled. On the basis, the low-temperature titanium alloy material involved in the invention can be used for manufacturing profiles or components in various forms, and low-temperature titanium alloy components in different forms can be manufactured by combining a numerical simulation technology optimization process scheme. The low-temperature mechanical properties of the low-temperature titanium alloy material under the condition of 20K can meet the requirements that the tensile strength Rm is larger than or equal to 1500MPa, the elongation A is larger than or equal to 12%, and the low-temperature strength and plasticity matching is excellent.

The invention relates to an underground deep deformation estimation method based on ground surface settlement remote sensing monitoring, which comprises the following steps of: on the basis of dividing a goaf stratum into a caving zone, a fissure zone, a bending zone and a loose zone, according to a goaf deformation mechanism, transverse deformation diffusion and deformation body expansibility of each layer zone; and an in-layer deformation and interlayer deformation transfer formula of each layer belt is established, and a layer-by-layer superposition method for final permanent deformation of the stratum of the goaf is realized. According to layer-by-layer transmission of goaf settlement deformation from deep deformation to earth surface deformation, relational expressions between earth surface deformation and underground deep deformation in different stages are provided respectively, and finally, according to a final permanent deformation value of a goaf stratum, an underground arbitrary-depth stratum deformation estimation method in different stages based on earth surface deformation remote sensing monitoring is provided. According to the method, the problem that the surrounding rock deformation load cannot be estimated according to actual measurement in tunnel and underground engineering safety evaluation through coal mining deformation in the mining active period is solved.

The invention discloses a fire-fighting water storage tank welding auxiliary device, and relates to the technical field of fire-fighting water storage tank processing, the fire-fighting water storage tank welding auxiliary device comprises a base, an outer stabilizing mechanism, an inner stabilizing mechanism and a horizontal adjusting seat installed on an external supporting device, the base is provided with a supporting mechanism, and the horizontal adjusting seat is provided with the outer stabilizing mechanism and the inner stabilizing mechanism; the outer stabilizing mechanism and the inner stabilizing mechanism are each provided with an anti-deformation mechanism and a welding head. Through cooperation of the bearing assembly, the side supporting assembly and the second side supporting piece, the water storage tank body and the sealing cover piece can be adaptively borne and supported during welding, and the welding efficiency and stability are improved; through a multi-point supporting structure, the stability of a welding head during welding is improved, and the problem that a welding seam is discontinuous is solved; the temperature of the front welding area and the temperature of the rear welding area are properly increased, the cooling speed can be reduced, the shrinkage difference caused by rapid cooling is reduced, residual stress generated in the welding process is released, and the deformation risk is reduced.

The invention relates to the technical field of deep foundation pit monitoring, and discloses a deep foundation pit micro-deformation InSAR remote sensing method and system and a storage medium. The method comprises the following steps: synchronously acquiring data through a ground radar and an InSAR satellite, and obtaining a point target set and an original scattering characteristic sequence; obtaining a net deformation phase sequence without influence through registration residual correction, phase deduction and weighted fusion processing, and carrying out phase consistency quality control and unwrapping processing to obtain an accumulated deformation quantity sequence; constructing a deformation mechanism correlation characteristic matrix based on correlation analysis of the cumulative deformation quantity sequence and radar reflection intensity amplitude attenuation characteristics; and fusing the deformation mechanism correlation feature matrix and the real-time differential interference image group, extracting deformation rate and phase gradient change, and further generating a deep foundation pit local micro-deformation risk early warning index set. According to the invention, the tiny deformation of the surrounding area of the foundation pit can be effectively detected, potential risks are warned in advance, and the safety and monitoring efficiency in the construction process are improved.

The invention relates to a method for calculating dislocation structure energy based on discrete dislocation kinetics, which comprises the following steps of: decomposing strain and stress generated by plastic deformation in a crystal into an elastic field generated by dislocation in an infinite continuous medium and an additional field used for correcting real boundary conditions; and the stress and strain states of the target crystal material under the actual plastic deformation condition can be accurately captured, so that the influence of a real boundary on the plastic deformation process is deeply reflected. Dynamic evolution of a large number of discrete dislocation sections is directly considered through the discrete dislocation dynamics theory, the plastic behavior of a material is essentially simulated, the evolution process of a dislocation substructure can be directly captured, the plastic deformation mechanism of the material is essentially reproduced, and then a calculation formula of dislocation structure energy is deduced; the calculation precision of dislocation structure energy is improved, and the internal mechanism of different plastic deformation behaviors of the crystal material can be deeply understood.

The invention relates to the technical field of foundation pit supports, in particular to a repeatable assembly type steel support for foundation pit construction, which comprises an extension steel support, a butt joint steel support, a main steel support, an axial force supplement steel support, two jacks and two steel enclosing purlins, the butt joint steel support is fixedly connected with the main steel support, and the axial force supplement steel support is slidably connected with the inner wall of the main steel support; the two ends of the axial force supplementing steel support and the two ends of the extension steel support are fixedly connected with the jacks respectively. The quick dismounting and mounting mechanism is arranged to be linked with the anti-deformation mechanism, the axis of the extension steel support is limited, and the situation that when the axial force is insufficient, the joint of the extension steel support and the butt joint steel support collapses due to the gravity effect is prevented. Meanwhile, the gravity direction of the steel support is changed through a fixing plate on the gravity compensation axial force mechanism, the gravity of the steel support acts on a hinged plate downwards all the time, then a sliding plate and the axial force compensation steel support are driven to abut against the foundation pit, the installation time is shortened through the design, and the self-weight influence of the steel support is effectively controlled.

The invention relates to the field of cable cabling, in particular to density-adjustable cabling equipment and a control method thereof.The cabling equipment comprises a feeding mechanism, a pre-deformation mechanism, a bundling mechanism and a control unit; the feeding mechanism comprises a first guide disc driven by a driving unit to rotate, a main unwinding wheel used for unwinding a main wire core and a plurality of auxiliary unwinding wheels used for unwinding stranded cables. The pre-deformation mechanism comprises a pre-deformation device, and the pre-deformation device is provided with a first diameter measuring unit and a second diameter measuring unit; the bundling mechanism comprises a box body and a pulling piece, the distance between the box body and the pre-deformation mechanism is adjustable, a cabling through hole for a main cable core to penetrate through is formed, and the control unit can calculate a target spiral angle of the stranded cable under the condition that the preset distance is met, and further calculates the rotating speed of the first driving unit and the pulling speed of the pulling piece; according to the invention, the cabling process can be accurately controlled, the cable coating density can be flexibly adjusted, the cabling quality can be guaranteed, and the production reliability can be improved.

The invention provides a three-layer lamination differential type conical surface multi-dimensional deformation mechanism, and particularly belongs to the technical field of aircrafts. The three groups of outer-layer supporting sheets, middle-layer supporting sheets and inner-layer supporting sheets are circularly and sequentially arranged, so that the differential type supporting sheets cannot interfere with one another and can form a complete conical surface shape after being completely unfolded in place, and a conical surface formed by the supporting sheets is good in leakproofness and supporting performance. The device comprises a conical surface body and an actuating ring, and further comprises a guide ring, a transmission assembly and a supporting assembly. An actuating ring and a guide ring are arranged on the outer side of the conical surface body, the guide ring is located below the actuating ring, a supporting assembly is arranged below the guide ring and arranged at an opening of the bottom face of the conical surface body, and a transmission assembly is arranged between the guide ring and the supporting assembly. A spherical hinge is fixedly mounted on the bottom surface of the actuating ring, a spherical hinge is fixedly mounted on the top surface of the guide ring, and a rigid rod is arranged between the two spherical hinges; a guide groove is formed in the inner side of the actuating ring, and a linear guide piece is arranged in the guide groove.

The invention provides a molecular dynamics method for simulating mechanical properties of a high-entropy alloy. By exploring the mechanical property response and plastic deformation mechanism of the high-entropy alloy through the method, not only can the atomic structure transformation, stress-strain change and dislocation evolution process of the high-entropy alloy in the nanoindentation process be deeply analyzed to realize real-time observation of the internal deformation behavior of the material, but also the calculation tasks can be processed in batches, so that the calculation efficiency is improved. And the calculation efficiency is greatly improved, so that an important theoretical support is provided for engineering application of the high-entropy alloy and design and development of excellent performance.

The utility model relates to the field of spinning, in particular to a woven fabric traction adjusting device for a warp knitting machine, which comprises a machine shell, a machine frame, a traction device and a control device, and a conveying roller is arranged on the inner side of the machine shell; the anti-deformation mechanism is arranged on the inner side of the machine shell, and the surface of the anti-deformation mechanism penetrates to the exterior of the machine shell; wherein the anti-deformation mechanism comprises an anti-wrinkling assembly arranged on the inner side of the machine shell, and an edge shifting assembly is arranged on the surface of the anti-wrinkling assembly; when the woven fabric is pulled, the central area of the woven fabric can be smoothed under the action of the crease-resistant assembly, the device drives the smoothing plate to be attached to the lower inclined face of the woven fabric by manually adjusting the position of the positioning rod, the pulled woven fabric is supported in an auxiliary mode, wrinkles generated in the pulling process of the woven fabric are smoothed, and the smoothness of the woven fabric is improved. Therefore, wrinkles in the middle area of the woven fabric are reduced in the traction process, and deformation of the woven fabric caused by traction is reduced.

The deformable land-air amphibious robot comprises a robot body, a deformation mechanism, a land-air combined power device, an environment sensor and a controller, the deformation mechanism is installed on the robot body, the land-air combined power device is installed on the deformation mechanism, and the controller communicates with and controls a transverse rod steering engine, a longitudinal rod steering engine and the land-air combined power device. The environment sensor is installed on the machine body. The air-ground amphibious robot integrates a rotor power device and a wheel driving force device and can deform in multiple modes, and compared with existing cage type and wheel type air-ground amphibious robots, the air-ground amphibious robot has the advantages of being compact in structure, low in weight, long in endurance and high in task efficiency. Deformation resistance can be reduced through cooperative tilting in the air-ground switching process, the height / width size of the aircraft can be adjusted through cooperative tilting in the flight / ground movement process, and the aircraft has better obstacle space passing capacity, flight stability and holder detection view.

The invention belongs to the field of material science and metamaterials, and particularly relates to an internal stress self-loading two-rod two-cable tension characteristic negative poisson ratio metamaterial structure which comprises an internal stress self-loading two-rod two-cable tension metamaterial cell element structure and a rotating hinge. The two-rod and two-cable tensioning metamaterial cell element structure capable of automatically loading the internal stress comprises a rigid shell part, a T-shaped rod piece, a pressed elastic assembly, a tensioned elastic assembly and a hydrogel driving assembly. The characteristics of self-stabilization, self-recovery, self-adjustment and the like of the overall tensioning structure are combined, the unique deformation mechanism of the negative Poisson's ratio material is reserved, the local stress concentration effect of a traditional material is overcome, the limitation that the tensioning structure depends on external loading internal stress is broken through, the energy absorption, shock absorption, impact resistance and other performance of the negative Poisson's ratio material are improved, and the tensile strength of the negative Poisson's ratio material is improved. The method is expected to be developed vigorously and can realize application value in multiple fields.

The invention provides a copper foil thickness analysis method and device. The copper foil thickness analysis method comprises the steps that tension values of all layer number positions and thickness measurement results of the corresponding layer number positions in the copper foil winding process are obtained; analyzing a deformation mechanism by combining the obtained interlayer relative displacement and torsion angle according to the compression deformation analysis result to obtain stress distribution mode data; compensating thickness measurement data based on the stress distribution mode data to obtain compensated thickness measurement data; setting a normal thickness range and an anomaly judgment threshold based on the compensated thickness measurement data, and determining a sensitivity identification threshold parameter of thickness anomaly detection; judging a thickness anomaly state according to the sensitivity identification threshold parameter of the thickness anomaly detection to obtain a thickness anomaly detection result; and in combination with the thickness anomaly detection result and historical winding process thickness measurement data, thickness anomaly detection combination parameters are determined.

The invention discloses an arch dam aging deformation mechanism analysis method, and relates to the field of hydraulic structure safety. The method comprises the steps that based on three-dimensional terrain and geological data, a high-precision arch dam-foundation overall finite element mesh model is established, concrete materials and permeation partitions are divided carefully, and an anti-seepage and drainage system structure is embedded; by means of multi-source monitoring data, real boundary conditions such as water temperature and air temperature and thermodynamic parameters are dynamically recognized and optimized through the intelligent inversion technology; respectively analyzing the aging influence of single factors such as a temperature field and valley amplitude deformation on arch dam deformation by adopting finite element simulation; on the basis of the normalized deformation response data, a Bayesian optimized long-short-term memory neural network and a hierarchical correlation propagation algorithm are adopted, contribution weights of all factors to deformation are calculated, and weight rationality is verified through global sensitivity analysis. According to the method, quantitative separation and evaluation of the main deformation influence effect of the arch dam are realized, and a theoretical basis can be provided for structural health monitoring and safety management.

The embodiment of the utility model provides a shock absorber, a vibration isolation device, two device covers and refrigeration equipment, and belongs to the technical field of refrigeration, a first deformation mechanism has positive rigidity, and one end of the first deformation mechanism is installed on a main base. The adjusting blocks are connected with the other end of the first deformation mechanism, the adjusting blocks and the main base are arranged in the first direction, the adjusting blocks are arranged on the two opposite sides of the first deformation mechanism in a striding mode in the second direction, and the second direction and the first direction are arranged in a crossed mode. The auxiliary bases are arranged on the two opposite sides of the main base in the second direction. The second deformation mechanisms have negative stiffness, the auxiliary bases on each side are correspondingly provided with the second deformation mechanisms, and the second deformation mechanisms on each side are rotationally connected with the corresponding auxiliary bases and the corresponding ends of the adjusting blocks correspondingly. According to the shock absorber, the vibration isolation device, the two device covers and the refrigeration equipment, the good vibration isolation effect is achieved in a low-frequency interval, and vibration noise of the two device covers can be reduced.

The utility model relates to the technical field of angle steel members, and discloses an angle steel member compression test loading device which comprises a base, the upper surface of the base is fixedly connected with a reaction frame through bolts, the reaction frame is provided with an angle steel member, and the reaction frame is provided with a first detection device and a second detection device. The first detection device is used for detecting the stress condition of the angle steel component in the vertical direction, the second detection device is used for detecting the stress condition of the angle steel component in the horizontal direction, the first detection device is provided with a fixing device, and the fixing device is used for fixing the detected angle steel component. According to the method, the compression resistance and the stability of the angle steel component can be evaluated more accurately, more reliable reference is provided for engineering application, the stress condition of the angle steel component in the vertical direction can be comprehensively understood, including the degree, the distribution, the development trend and the like of compression deformation, and the stress performance and the deformation mechanism of the angle steel component can be understood more deeply.

The invention relates to the technical field of welding, and discloses a complex sheet metal frame cabinet tailor-welding method which comprises the following steps: S1, splitting: assembling an upper frame, a lower frame and a middle stand column according to a design structure of a frame cabinet; s2, bending is conducted, specifically, corners of the upper frame, the lower frame and the middle stand column are bent; s3, splicing is conducted, specifically, the upper frame, the lower frame and the middle stand columns are spliced into a frame, and the middle stand columns are clamped in the bent positions; and S4, welding is conducted, specifically, the spliced exposed parts of the upper frame, the lower frame and the middle stand column are welded. Through the four-step process of modular splitting, precise bending, mechanical interlocking and flat welding optimization, an innovative frame of mechanical positioning and then welding fixing is constructed, welding deformation is controlled from the source, the assembly consistency is improved, mechanical structure design and the welding process are deeply coupled, and the welding efficiency is improved. And a dual anti-deformation mechanism of physical interlocking constraint and welding heat input control is formed.

The invention provides a high-cycle fatigue strength evaluation method based on damage influence, and belongs to the technical field of aero-engines. The method comprises the following steps: performing a high-cycle fatigue test on a to-be-tested material to obtain first high-cycle fatigue strength, and performing a damage fracture test corresponding to a damage type to obtain a damage life, the damage type comprising creep damage and low-cycle damage; determining interruption time on the basis of the damage life, performing a damage fracture test on the basis of different interruption time, then performing a high-cycle fatigue strength test to obtain second high-cycle fatigue strength, and constructing a damage model; constructing a crystal plasticity constitutive model based on the damage model to perform simulation calculation on the to-be-tested material to obtain a simulation damage value; and correcting the first high-cycle fatigue strength based on the second high-cycle fatigue strength and the simulated damage value to obtain an evaluation result of the to-be-tested material. According to the method, deformation mechanisms of different damage types are clearly distinguished, the method is more flexible, interruption time setting refers to influences of different damage degrees, and the method is more accurate, safer and more reliable.

The invention relates to a deformation treatment method for steep-dip phyllite, and relates to the field of civil engineering. The deformation treatment method comprises the steps that a tunnel body is excavated, the reserved deformation amount between a primary support and a secondary lining is designed, the tunnel body comprises a vault and a side wall, the deformation amount of the reserved vault is S1, the deformation amount of the reserved side wall is S2, and S1 is smaller than S2; and primary supporting and secondary lining are carried out in the tunnel body. According to the deformation treatment method for the steep-dip phyllite, under comprehensive analysis of geological survey and monitoring measurement, the heterogeneous deformation mechanism of surrounding rock after excavation is determined, it is proposed that the arch crown and the side wall adopt different reserved deformation amounts, and the deformation convergence rule of the surrounding rock on site is met; and therefore, instability and collapse of the right wall due to the gravity effect under the condition of blasting disturbance are avoided.

The invention discloses a method for improving the rolling quality of a thin-wall cladding tube, which comprises the following steps of: configuring a rolling tool mold and a tube blank; rolling a pipe blank by using the rolling tool mold to obtain a rolled cone in the rolling process; sampling is carried out on different positions of the rolling cone to obtain a plurality of sampling sections, and characteristic parameters of each sampling section are obtained; based on the multiple characteristic parameters, the deformation mechanism of the pipe blank in the rolling process is judged; according to the deformation mechanism, parameters of the rolling tool and mold are adjusted, and a new rolling tool and mold is formed; and the steps are repeated, and parameters of the rolling tool and mold are iteratively optimized. The rolling quality and performance of the zirconium alloy thin-wall cladding tube are improved, and therefore safe and reliable operation of a nuclear reactor is guaranteed.

The invention discloses a preparation method of a heterostructure high-performance metastable beta titanium alloy capable of inducing a deformation mechanism in a multilevel and sequential mode, and belongs to the technical field of metal materials. The method comprises the following steps: firstly, carrying out hot rolling in a beta single-phase region to prepare a blank and crushing coarse grains; substructures such as twin crystals and martensite are introduced through cold rolling; and through short-time annealing in a beta single-phase region, a multi-stage heterogeneous lamellar structure composed of thick equiaxed crystal grains, deformation recovery crystal grains and fine recrystallized crystal grains in an alternating manner is successfully constructed. The characteristic that twin crystals and martensite induce different stresses under different grain sizes is utilized, during deformation, thick equiaxed grains firstly start a deformation mechanism, and then fine recrystallized grains are activated; and in the later period of plastic deformation, the interior of the primary deformation strip further triggers a secondary deformation mechanism. The unique behavior of'grading-time sequence 'activation of a multi-deformation mechanism along with the increase of the dependent variable enables the metastable beta titanium alloy to keep excellent plasticity, and meanwhile, the work hardening rate is remarkably improved.