52 results about "Creep rate" patented technology

The invention belongs to the technical field of creep prediction, and particularly discloses a long-time creep data prediction method and device based on short-time creep data, and the method comprises the steps: obtaining the steady-state creep rate data of a material at different stress levels through a multi-stage stress staged loading method based on the short-time creep data obtained through a short-time creep test; determining a first fitting parameter value of the creep deformation performance model through nonlinear fitting; determining creep stress indexes under different stress levels based on the steady-state creep rate data and the creep stress; determining creep damage parameters under different stress levels based on the creep stress indexes and a creep damage parameter model; determining a second fitting parameter value of the creep deformation prediction model through nonlinear fitting, and predicting long-time creep deformation of the material; and determining a third fitting parameter value of the creep life prediction model based on the second fitting parameter value, and predicting the long-time creep life of the material. According to the invention, long-time creep performance prediction based on short-time creep data is realized.

A salt-cavern gas storage roof dolomite creep damage prediction method relates to the technical field of rock mechanics and comprises the following steps: acquiring elastic mechanical parameters and geological parameters of salt-cavern gas storage roof dolomite, and establishing a rock creep damage model under the action of graded circulation gas injection load; obtaining a rock creep rate control model under the action of the staged cycle gas injection load, performing parameter identification on the rock creep rate control model, and predicting the creep damage state of the dolomite of the reservoir roof under the action of the staged cycle gas injection load by using the rock creep rate control model subjected to parameter identification in combination with the elastic mechanical parameters and the geological parameters; according to the method, the creep mechanical behavior of the dolomite of the top plate of the salt-cavern gas storage under the action of the high-frequency cyclic load can be accurately represented, the creep time threshold value of the top plate can be accurately predicted, and the influence rule of the graded load on damage accumulation is quantified; therefore, an accurate quantitative decision basis is provided for gas injection load regulation and control and safe operation cycle optimization of the salt-cavern gas storage.

An analysis method for a metro line steel rail corrugation forming mechanism comprises the steps that numerical model input parameters are obtained, and a wheel-rail three-dimensional coupling numerical model suitable for a vehicle-rail / wheel set of a metro line is constructed; longitudinal and transverse half width lengths of wheel-rail contact spots in the stable running process of the vehicle / wheel are obtained so as to determine a creep force-creep rate relation curve; determining a creep rate saturation critical value to judge the creep saturation state of the wheel-rail system; a macroscopic determination program for determining the structural stability of the wheel-rail system; determining an analysis process of a steel rail corrugation forming mechanism; judging whether the contact interface creep is saturated or not, and analyzing the probability of occurrence of rail corrugation according to the judgment; and determining a wavelength fixing method for rail corrugation in an actual measurement interval, and verifying the effectiveness and applicability of the method. According to the method, the steel rail corrugation phenomenon on a subway line is focused, the analysis method is provided from the two aspects of microcosmic creep saturation and macroscopic structure stability, and therefore the occurrence probability of steel rail corrugation is reflected more accurately.

The invention belongs to the field of aero-engines, relates to a composite material numerical simulation and life estimation technology, and provides a method and a system for calculating creep damage and creep life of a ceramic matrix composite material. The method comprises the following steps: acquiring a material failure strain of a simulation test piece and a plurality of time-strain curves of a plurality of load levels at each creep temperature; according to all the time-strain curves at each creep temperature, creep damage evolution parameters of the composite material are solved through a probability theory t distribution method and a fitting method to obtain a creep rate formula; and acquiring the creep damage and the creep life of the tested piece according to a creep rate formula and the material failure strain through a finite element simulation method. According to the method, the material parameter dispersity is considered, the creep damage and the creep life of the composite material are rapidly and reasonably predicted, support is provided for forward design of the ceramic-based composite material structure, and the iteration speed and the research and development efficiency of the ceramic-based composite material structure are improved.

The invention discloses an anti-skid control method for a high-speed train at a higher speed, which comprises the following steps of: firstly, acquiring basic information such as the speed and the axle load of the high-speed train in real time through a sensor, establishing a real-time analysis model by virtue of data, then calculating a real-time adhesion coefficient, and further judging the rail surface state of wheel-rail contact of the high-speed train; the optimal creep rate under the current rail surface condition is calculated based on the information, the traction or braking torque is adjusted through a control strategy by comparing the optimal creep rate with the actual creep rate in real time, anti-skid control adjustment is conducted, and the adhesion utilization rate and operation safety are improved. According to the method, for a high-speed train at a higher speed, the torque is changed through adhesion control, so that anti-skid control is carried out, the adhesion utilization rate and the operation safety are improved, and wheel skid and abnormal abrasion can be effectively restrained.

The invention relates to a method for establishing a rock creep failure time prediction model under a conventional triaxial compression condition. The method comprises the following steps: performing conventional triaxial compression tests on a target rock under n groups of different creep stresses under preset confining pressure to obtain n creep curves; for any creep curve, acquiring creep failure time and constant-speed creep rate corresponding to the creep curve, so as to obtain a plurality of to-be-fitted points; linear fitting is carried out on the multiple to-be-fitted points to obtain a fitting curve, fitting parameters of the fitting curve are obtained, and the fitting parameters comprise the slope and the intercept; and obtaining a rock creep failure time prediction model of the target rock under the conventional triaxial compression condition according to the fitting parameters. When the model is used, only the target rock needs to be tested subsequently, and the damage time can be predicted according to the model when the creep rate is monitored, so that constructors can conveniently take protective measures in advance.

The invention relates to the technical field of nuclear fuel, in particular to a nuclear fuel cladding tube biaxial creep process monitoring system, which comprises a temperature stress data capture module, a regional state judgment module, a creep rate adjustment module, a thermal control stress regulation and control module and an effect feedback correction module. According to the method, temperature stress data of key parts are collected and subjected to structural conversion, data standardization and usability are improved, space-time information is fused to construct a coupling data table, accurate recognition of thermal stress is supported, the temperature stress trend of a boundary area is jointly analyzed, abnormal fluctuation sections are recognized, and the creep distribution recognition accuracy is improved; the method comprises the steps of analyzing continuous response increments and mutation points, forming a fine feature point set, enhancing strain mutation capture capability, extracting a key interface adjustment value, analyzing response differences before and after adjustment, realizing dynamic monitoring and verification of a control unit, improving regulation and control targeting, identifying an unreached target area through feedback comparison, constructing a return difference compensation mechanism, and realizing dynamic monitoring and verification of the control unit. And the regulation efficiency and the closed-loop regulation and control capability are enhanced.

The invention relates to the technical field of rock mechanics and underground engineering, in particular to an anchored jointed rock mass multi-field coupling creep characteristic analysis method which comprises the following steps: preparing anchored rock mass samples which are corroded by inorganic salt and contain different joint occurrences, and installing different pre-stressed anchor rods. And carrying out a graded loading creep compression experiment, and synchronously collecting axial deformation and acoustic emission signals. And drawing a creep time-history curve based on deformation data, and determining long-term strength and a creep stage by adopting a steady-state creep rate method. And calibrating the crack initiation and expansion process of the crack at each stage of creep deformation by using an acoustic emission signal. And analyzing response differences between crack development and anchoring failure under different inorganic salt components, concentrations, joint occurrence and prestressing forces, and determining the influence degree of each factor on the anchor rod support effect in each creep deformation stage. According to the method, synchronous quantitative analysis of macroscopic creep characteristics and microscopic damage evolution is realized by coupling chemical corrosion and prestress action, and the accuracy of long-term strength prediction and anchoring failure mechanism understanding is improved.

The invention discloses an alloy high-temperature tensile and creep deformation parameter identification and prediction method and device based on a physical mechanism and a storage medium, and relates to the field of alloy high-temperature tensile and creep plasticity constitutive parameter identification and prediction.The alloy high-temperature tensile and creep deformation parameter identification and prediction method comprises the steps that a sample is subjected to a tensile test and a creep test to obtain experimental data; the nominal yield stress and the steady-state creep rate are obtained through analysis; measuring and analyzing the sample by using a backscattered electron diffraction analysis technology to obtain data, establishing a finite element model according to the data, and performing tensile finite element simulation and creep finite element simulation to obtain simulation data; constructing a crystal plastic constitutive model, and obtaining primary target parameters of an improved plastic flow rule through a least square method; a true stress strain value and a creep strain time value which are obtained by comparing experimental data and simulation data are compared to obtain matched secondary target parameters, and then high-temperature mechanical response, deformation behaviors and failure behaviors of the sample in different states are predicted.

This application relates to the field of catenary elastic sling monitoring, and provides a method and system for measuring the tension of catenary elastic slings to solve the problems of insufficient accuracy of tension measurement and weak analysis ability. This application includes: based on the wind load and humidity of the catenary elastic sling, correlating the creep rate of the sling material at different temperatures with the weight coefficient of tension attenuation, and constructing a mapping database; using a radar array to monitor the parabolic deformation of the elastic sling under the sliding impact of the pantograph, combining with the yield strength temperature attenuation curve corresponding to the sling material, correcting the parameters of the parabolic equation, and inversely generating tension distribution data; analyzing the vibration frequency components in the phase difference signal, correlating the tension data with the historical creep rate in the same temperature range of the database, and establishing a cross-domain coupling relationship; using a convolutional neural network to fuse the weight coefficient of the creep rate and the vibration distortion characteristics to obtain a predicted value of tension attenuation. The technical solution provided by this application improves the accuracy of tension measurement and the analysis ability.

The invention provides a method for predicting high-temperature creep endurance life, which comprises the following steps of: respectively processing and analyzing creep test data of a target material in a high-stress state and a low-stress state by setting a boundary load value; the creep threshold value and the endurance life in the low-stress state are extrapolated by using the minimum creep rate and the endurance life in the high-stress state and the minimum creep rate in the partial low-stress state, and compared with the prior art, the accuracy of the obtained low-stress endurance life is higher. According to the method, an ultra-long low-stress endurance test is not needed, so that the test period and the test cost are greatly reduced.

This invention provides a method, system, and storage medium for determining the blasting time interval in open-pit mines. The method includes: determining the disturbance frequency that has the greatest impact on pore water pressure in soil and rock mass based on field monitoring and laboratory experiments, simulating extreme and dangerous working conditions; dynamically disturbing the sample based on this frequency, judging the consolidation state according to the pore pressure dissipation and creep rate after disturbance, and recording the stable consolidation time T when the conditions are met, obtaining time series at different blast center distances; performing a secondary disturbance after time T, quantitatively evaluating the consolidation effect based on the changes in peak pore pressure and permeability coefficient before and after the secondary disturbance; judging and correcting time T based on the evaluation results, and finally determining the safe time interval for macroscopic blasting operations. This invention can simultaneously consider pore pressure dissipation and soil skeleton deformation, accurately identify the consolidation state and structural damage of soil and rock mass, and provide a scientific and safe basis for time interval decision-making for high-frequency blasting operations in open-pit mines.

This invention discloses a long-term prediction method for deep-sea creep based on in-situ pore pressure observation using Bayesian-LSTM, relating to the fields of sediment dynamics and marine engineering. The method includes: deploying pore pressure sensors to collect pore water pressure data in real time, performing standardization processing, and calculating the pore pressure change rate; constructing a creep rate calculation model based on the effective stress principle and power law; building a time-series feature dataset using sliding window technology, constructing and training a Bayesian-LSTM network model, and introducing a Monte Carlo Dropout layer to assess prediction uncertainty; outputting a high-precision creep rate using a multiple sampling averaging strategy; calculating the cumulative creep distance through numerical integration, and constructing confidence intervals to achieve medium- and long-term trend prediction and risk analysis. This invention integrates physical mechanisms and data-driven approaches, effectively handling data noise and prediction uncertainty in the complex environment of the deep sea, significantly improving the accuracy and reliability of long-term creep prediction, and providing a scientific basis for deep-sea engineering safety assessment.

The invention discloses a safety assessment method and system for a main steam pipeline of a power station boiler, and the method comprises the steps: obtaining the material information of the main steam pipeline of the power station boiler, and the material information comprises the crack length of a material and the number of cyclic loads; a nonlinear creep damage model used for describing material creep is set, a material creep rate index of the main steam pipeline of the power station boiler is calculated according to the material information, a creep rate threshold value is set, and when the material creep rate index exceeds the creep rate threshold value, warning information is sent out; or setting a non-linear crack growth model for describing the crack growth of the material, simulating the crack growth condition of the material according to the material information, and sending out alarm information when the crack growth exceeds a preset crack growth threshold value; or setting a material failure probability calculation model for describing the material failure, calculating the material failure probability according to the material information, and sending out alarm information when the material failure probability exceeds a preset material failure probability threshold value.

The invention relates to the technical field of mechanical testing of materials, and discloses a compression creep test tool and a test method.The compression creep test tool is ingenious in design and mainly comprises an upper clamp, a lower clamp, a pin, an extensometer, a cushion block and the like. The tool fixes the upper and lower clamps through a pin structure to ensure the stability of the test device. The extensometer and the clamp move synchronously, creep deformation of the sample is monitored in real time, an electric signal is transmitted to a control system through a cable to be analyzed, and the creep rate and the total deformation are calculated. In order to improve the test efficiency and accuracy, coaxial guide and translation guide designs are introduced in the second embodiment, so that the test sample is quickly put in and taken out, and the coaxiality of the clamp is ensured. In the third embodiment, the stability and reliability of the experiment in a long term and a short term are ensured by introducing a pressure source switching mechanism and utilizing gravity traction and a mechanical traction assembly. The whole tool is easy and convenient to assemble and convenient to operate, and important data support is provided for material performance research and structural design.

This application belongs to the technical field of creep prediction, and specifically discloses a method and device for predicting long-term creep data based on short-term creep data. The method includes: obtaining steady-state creep rate data of a material at different stress levels through a multi-level stress step loading method based on the short-term creep data obtained from short-term creep tests; determining the first fitting parameter value of the creep deformation performance model through non-linear fitting; determining the creep stress exponent at different stress levels based on the steady-state creep rate data and creep stress; determining the creep damage parameter at different stress levels based on the creep stress exponent and the creep damage parameter model; determining the second fitting parameter value of the creep deformation prediction model through non-linear fitting to predict the long-term creep deformation of the material; and determining the third fitting parameter value of the creep life prediction model based on the second fitting parameter value to predict the long-term creep life of the material. This application realizes the prediction of long-term creep performance based on short-term creep data.

The application discloses a power station boiler main steam pipeline safety evaluation method and system, and the method comprises the following steps: obtaining material information of a power station boiler main steam pipeline, wherein the material information comprises crack length and cycle load times of the material; a nonlinear creep damage model for describing material creep is set, and according to the material information, a material creep rate index of the power station boiler main steam pipeline is calculated, and a creep rate threshold is set; when the material creep rate index exceeds the creep rate threshold, an alarm information is sent; or a nonlinear crack growth model for describing material crack growth is set, and according to the material information, a crack growth situation of the material is simulated; when the crack growth exceeds a preset crack growth threshold, an alarm information is sent; or a material failure probability calculation model for describing material failure is set, and according to the material information, a material failure probability is calculated; when the material failure probability exceeds a preset material failure probability threshold, an alarm information is sent.

A method of performing a wellbore servicing operation may include: obtaining a measurement of steady state creep rate (ε′SS) within a cement sheath associated with a wellbore while performing the wellbore servicing operation in the wellbore; determining a number of cycles to failure (Nf) of the cement sheath using a cement material fatigue model wherein the cement material fatigue model has an input of steady state creep rate (ε′SS); adjusting at least one operational parameter of the wellbore servicing operation in response to the determined number of cycles to failure (Nf) to form adjusted operational parameters; and performing the wellbore servicing operation at the adjusted operational parameters

The invention discloses a high-throughput test device and method for in-situ high-temperature circumferential creep of a thin-walled tube, and relates to the technical field of detection of physical properties of the thin-walled tube, the high-throughput test device comprises a high-pressure kettle, a to-be-tested thin-walled tube is arranged in the high-pressure kettle, and the high-pressure kettle is communicated with a pressure control mechanism; the two ends of the to-be-tested thin-walled tube penetrate through the autoclave in a sealed mode and extend out, and the two ends of the to-be-tested thin-walled tube are communicated with the pressure control mechanism and used for controlling the internal pressure of the to-be-tested thin-walled tube. The external pressure and the internal pressure of the to-be-tested thin-walled tube can be flexibly adjusted through the pressure adjusting mechanism, and various pressure and temperature environments can be simulated in combination with the temperature adjusting mechanism. By means of the observation hole channels and the laser range finders arranged on the two sides of the to-be-measured thin-walled tube, the position variable quantity of the left side and the right side of the to-be-measured thin-walled tube can be measured in situ, then the outer diameter variable quantity and the creep rate of the to-be-measured thin-walled tube are calculated, test equipment does not need to be shut down in the measurement process, test conditions are kept stable, measurement data are true, and the test efficiency is improved.

The application provides a relaxation and creep performance correlation method, and belongs to the field of new materials and is used for developing new materials by testing related activities. First, a high-temperature relaxation test is carried out to obtain corresponding data of temperature-stress-creep relaxation rate. Second, a high-temperature creep test is carried out to obtain minimum creep rate data. Finally, the third step is data processing, and a correlation model is constructed. The application aims at the shortcomings of long data obtaining time and large sample consumption of existing creep performance data, and proposes to use the characteristics of short stress relaxation test, i.e., more creep information and less sample consumption, to quickly obtain a large amount of stress relaxation performance data, and then combine the correlation method shown in the application to quickly and massively obtain the creep performance, so that the service performance can be evaluated.

The present application relates to the technical field of composite materials, and particularly relates to a composite material product containing a hollow channel, a forming method thereof and a mold. The forming method is to reserve the position of the hollow channel through an occupying strip in a layering process, then to solidify the layer containing the occupying strip through mold forming or autoclave process, and then to pull out the occupying strip from the formed product. The occupying strip material has the characteristics of high creep rate, high strength and low friction coefficient, so that it deforms or displaces itself when pulled out, and then the interface debonding with the composite material is realized to form a hollow channel in the product. Compared with the existing technology of forming through pre-embedded pipeline, the influence of the thermal expansion coefficients of different materials is avoided, the composite product rejection rate is reduced, the process steps are reduced, and the production efficiency of the product is improved. The composite material product containing a hollow channel has no pre-embedded pipeline. The forming mold can form the composite material product containing a hollow channel without pre-embedded pipeline.

The present invention belongs to the field of aeroengines and relates to composite material numerical simulation and life prediction technology. It provides a method and system for calculating creep damage and creep life of ceramic-based composite materials. The method comprises: obtaining the material failure strain of a simulated test piece and multiple time-strain curves at multiple load levels at each creep temperature; solving the creep damage evolution parameters of the composite material using a probabilistic t-distribution method and a fitting method based on all time-strain curves at each creep temperature to obtain a creep rate formula; and obtaining the creep damage and creep life of the test piece based on the creep rate formula and the material failure strain using a finite element simulation method. The method of the present invention takes into account the dispersion of material parameters, quickly and reasonably predicts the creep damage and creep life of the composite material, provides support for the forward design of ceramic-based composite structures, and improves the iteration speed and R&D efficiency of ceramic-based composite structures.

The present invention discloses a method for quantifying the influencing factors of the change in the width of hydraulic fracturing fractures in a salt-bearing reservoir. The present invention includes conducting a triaxial compression creep experiment using a high-temperature and high-pressure creep instrument to calculate the creep rate of salt rock in the salt-bearing reservoir, measuring the embedment depth of proppants and the total height change of fractures and rock slabs using a long-term flow conductivity testing device, calculating the karst rate of salt rock in the salt-bearing reservoir through the mass change of the rock slab before and after, the dissolution time, and the reaction area, and subtracting the numerical values of the effects of three actions, namely salt rock creep, salt rock karstification, and proppant embedment, on the fracture width from the total width change of fractures and rock slabs. The present invention can quantitatively measure the width of proppant fractures in a salt-bearing reservoir and quantify three main actions affecting the fracture width in a salt-bearing reservoir: the karstification action of the salt-bearing reservoir, the creep action of the salt-bearing reservoir, and the embedment action of proppants. This method is highly comprehensive, simple to operate, and easy to quantify, and can provide reliable data support for the development of salt-bearing reservoirs.

The invention relates to a method for calculating the creep rate of oxide dispersion strengthened steel in an irradiation environment. The method effectively combines an irradiation-induced point defect evolution theory, an Ostwald ripening theory for coarsening oxide particles under an irradiation environment, a dislocation ring hardening theory caused by irradiation, and an oxide dispersion strengthening theory for size distribution and spatial distribution of the oxide particles. Wherein the influence of specific point defect evolution, oxide particle coarsening, dislocation ring hardening and size distribution and space distribution thereof on the performance of the oxide dispersion strengthened steel in the irradiation environment is considered, and quantitative calculation and analysis of the creep rate of the oxide dispersion strengthened steel in the irradiation environment are achieved. The threshold stress obtained by the calculation method provided by the invention is well matched with an experimental result. The related strengthening mechanism analyzed in the method has important significance for researching and analyzing the mechanical property of the oxide dispersion strengthened steel at different temperatures and irradiation time in the irradiation environment. Through the analysis method provided by the invention, the temperature of the irradiation environment is changed, the numerical value of the irradiation time is regulated and controlled, and the influence of microdefect evolution and creep rate of the oxide dispersion strengthened steel under different conditions is researched, so that theoretical guidance is provided for the design of the high-performance oxide dispersion strengthened steel.

A method of performing a wellbore servicing operation may include: obtaining a measurement of steady state creep rate ( ε'ss) within a cement sheath associated with a wellbore while performing the wellbore servicing operation in the wellbore; determining a number of cycles to failure (Nf) of the cement sheath using a cement material fatigue model wherein the cement material fatigue model has an input of steady state creep rate ( ε'ss); adjusting at least one operational parameter of the wellbore servicing operation in response to the determined number of cycles to failure (Nf) to form adjusted operational parameters; and performing the wellbore servicing operation at the adjusted operational parameters.

The technical problem to be solved by the present invention is to provide a tube for a semiconductor manufacturing device, which has excellent adhesiveness to a joint and excellent flexure resistance when the thickness is small. A tube for a semiconductor manufacturing device, which contains a fluorine-containing polymer, and wherein the fluorine-containing polymer satisfies the following requirements (A): the creep permanent strain of the fluorine-containing polymer is 4.5% or more, and the creep rate of the fluorine-containing polymer as measured by a tensile creep test is 2.60% or less; the flexural modulus of elasticity of the fluorine-containing polymer is 1100 MPa or less, the tensile strength of the fluorine-containing polymer is 45 MPa or more, and the tensile elongation of the fluorine-containing polymer is 360% or more.

An embodiment of the present invention provides a method, device, equipment, medium, and product for determining drilling fluid density. The method includes: obtaining the maximum horizontal principal stress, minimum horizontal principal stress, target temperature, and target creep rate of the salt rock corresponding to the target drilling depth in the salt rock formation area to be measured; inputting the maximum horizontal principal stress, minimum horizontal principal stress, target temperature, and target creep rate into a preset safe drilling fluid pressure calculation model to determine the safe drilling fluid pressure; and determining the safe drilling fluid density based on the safe drilling fluid pressure and a preset safe drilling fluid density algorithm. The method for determining drilling fluid density of the embodiment of the present invention can determine a safe drilling fluid pressure that matches the salt rock at the target drilling depth through the preset safe drilling fluid pressure calculation model. Based on the safe drilling fluid pressure, a safe drilling fluid density with a smaller error than the actual mud density can be determined, thereby improving the accuracy of the safe drilling fluid density.

According to the high-temperature-resistant and high-toughness HDPE double-wall corrugated pipe and the preparation method thereof, through the raw material formula, the alpha crystal form nucleating agent, the organic modified montmorillonite, the elastomer toughening agent, the specific compatilizer, the lubricating agent and the antioxidant system containing the hydrazinium salicylate are scientifically proportioned, the montmorillonite modification technology is optimized, and the high-temperature-resistant and high-toughness HDPE double-wall corrugated pipe is obtained. The surface of the modified montmorillonite is driven to be enriched to form a high-temperature-resistant functional layer, and parameters such as melt blending temperature and time, adsorption molding pressure control and gradient cooling are accurately regulated and controlled. Performance tests show that the thermal deformation temperature of the pipe is higher than 135 DEG C, the creep rate is as low as 3.2%, the impact strength reaches 43.5 kJ / m < 2 >, the tensile strength retention rate reaches 85% or above, the ring stiffness is stabilized to be about 9 kN / m < 2 >, and the obtained pipe has high ring stiffness, high impact strength and ultralow creep rate and can stably serve for a long time in a high-temperature environment.

The present invention discloses a device for testing specimens of the creep rate of formed refractory mortar, which includes a base, a central column, side columns, a support structure, and a positioning structure. The same number of positioning structures are provided on the side columns, and positioning pieces are provided on the positioning structures. Part of the movement trajectory of the positioning piece falls above the refractory brick thin plate. By arranging side columns, vertically sliding positioning structures, and horizontally sliding positioning pieces on the periphery of the refractory brick thin plate, the height of the positioning piece is consistent with the thickness of the refractory mortar to be laid. When making test blocks, first place the positioning piece on the lower refractory brick thin plate, then lay refractory mortar thicker than the height of the positioning piece on the upper surface of the refractory brick thin plate and place a new refractory brick thin plate on the upper part of the mortar. Finally, by rotating and extruding the upper refractory brick thin plate, the upper and lower ends of the positioning piece are respectively attached to the two refractory brick thin plates. Through the positioning piece, the thickness of each layer of refractory mortar is precisely controlled, so as to precisely control the total thickness of the specimen.

The invention relates to a single crystal alloy creep life prediction method considering overheating influence. The method comprises the following steps: acquiring material parameters of a sample at different overheating temperatures; observing the volume fraction of a primary gamma'phase and the volume fraction and radius of a secondary gamma 'phase after the sample is overheated through a scanning electron microscope; calculating the width of a matrix channel based on the volume fraction of the primary gamma'phase, and calculating Orowan stress based on the width of the matrix channel and material parameters; on the basis of interaction between the secondary gamma'phase and dislocation, the volume fraction and radius of the secondary gamma 'phase, a shearing mechanism and an Orowan mechanism, critical slitting stress of different mechanisms is obtained, a critical slitting stress sum value obtained through weighted summation on the basis of the mean values of the critical slitting stress is converted, and a precipitation strengthening value is obtained; based on Orowan stress, a precipitation strengthening value and a classical high-temperature alloy plasticity constitutive equation, the minimum creep rate is calculated, and then a creep life prediction model is constructed based on a Monkman-Glan relational expression.