48 results about "In plane strain" patented technology

The invention belongs to the field of material mechanical property testing and strain measurement, and particularly relates to a local strain measurement method and system based on a four-point bending and digital image correlation (DIC) technology, and the method specifically comprises the following steps: cutting to prepare a sample, carrying out surface electrolytic polishing, preparing speckles on the surface of the sample to be tested, and carrying out a four-point bending experiment; speckle images of the lower surface of the sample are collected, displacement correction is conducted in combination with bending deflection calculation, the bending load and the strain of the upper surface of the sample are obtained in real time, the stress-strain relation and local strain distribution of the lower surface of the sample are obtained through calculation, and finally deformation and failure mechanism analysis is conducted in combination with surface deformation and crack morphology. The method provided by the invention combines four-point bending and DIC plane strain measurement technologies, can realize stretching, compression and dynamic fatigue loading on the surface of the sample, is suitable for performance test and failure analysis of tension, compression and fatigue deformation of brittle metal materials such as intermetallic compounds and amorphous materials, and has the characteristics of convenience, rapidness and low cost.

The invention discloses a biaxial test device, comprising: a bracket, a container, a sample setting assembly and a press, etc. Before use, the sample is installed between two limit plates. On the basis of applying confining pressure, the press is started, and the pressure rod moves vertically downward and applies a vertical downward load to the sample. When the sample is subjected to the vertical downward load, axial compression and radial deformation will occur. At this time, the radial deformation of the sample on both sides of the limit plates is limited, and expansion occurs on both sides without the limit plates. Subsequently, under the joint action of the confining pressure and the limit plates, the sample undergoes plane strain. Since the container and the limit plates are both in a transparent state, the side section state of the sample when plane strain occurs can be well observed. At the same time, the multiphase mixed fluid in the mixing container penetrates into the rock sample inside the sample and flows out through an output pipeline and is tested and analyzed by external equipment, so that the potential influence of multiphase seepage on the mechanical behavior of rock mass can be studied under plane strain conditions.

The invention discloses a plane strain sensor and a plane strain detection method, the plane strain sensor comprises a supporting seat and a plurality of linkage arms, the linkage arms are annularly distributed on the periphery of the supporting seat, each linkage arm is provided with a connecting part, and the connecting parts are rotatably connected to the supporting seat; the linkage arm is further provided with an installation end and a detection end, and the installation end and the detection end are located on the two sides of the connecting part respectively. The mounting end is used for being connected with a to-be-detected surface, and a pre-bending induction sheet is mounted between the adjacent detection ends. In the detection process, when the mounting end of the linkage arm generates the deflection action, the detection end of the linkage arm can amplify the deflection amplitude, then the torsion deformation amount of the pre-bending induction sheet can be amplified, the pre-bending induction sheet can more easily detect the strain condition of the to-be-detected surface, then the strain amplitude of the to-be-detected surface can be expanded, and the detection accuracy of the to-be-detected surface is improved. The strain detection is easier to realize and the detection sensitivity is improved.

The invention relates to the technical field of coal mining and rock mechanics numerical simulation, and discloses a stress field reconstruction method of a plane strain numerical simulation model for coal mining, and the method comprises the following steps: firstly, obtaining an actually measured vertical stress increment and an actually measured bearing pressure peak value position of a stope face; then, an initial plane strain numerical simulation model is constructed, the space error between the peak position of the simulated bearing pressure and the actual measurement position meets a preset threshold value by adjusting the excavation step pitch, and therefore the numerical simulation calculation state is locked to eliminate space-time dislocation; a simulation strain increment is extracted in a locked state, a theoretical vertical stress difference equation is constructed based on an elastic mechanics plane strain constitutive relation, and a parameter inversion equation set is established in combination with multi-measurement-point data; and solving the corrected elastic modulus and Poisson's ratio by using a least square optimization algorithm. According to the method, through physical state locking and incremental theory inversion, system errors are effectively eliminated, and the reconstruction precision and mechanical preciseness of the mining-induced stress field are improved.

The invention discloses a bridge support column stress analysis method, which relates to the technical field of stress analysis, establishes a corresponding relation between shooting time data and an experiment support column image, and calculates displacement field data of pixel points between the experiment support column image and a current support column image. According to the method, non-contact measurement is adopted, the stress state of the bridge supporting column can be comprehensively monitored, the stress distribution diagram of the bridge supporting column can be monitored, the stress distribution diagram of the bridge supporting column can be monitored, and the stress distribution diagram of the bridge supporting column can be established according to the plane stress condition and the plane strain condition of the bridge supporting column. The interference of the traditional contact measurement on the stress distribution of the support column is avoided, and the measurement accuracy is improved. Meanwhile, real-time monitoring can be achieved, stress changes can be rapidly captured, the stress state is clearly displayed through visual plane stress and strain distribution diagrams and color codes, a scientific basis is provided for bridge safety assessment and maintenance, and the efficiency and safety of bridge management are effectively improved.

The invention provides an evaluation method for rapidly predicting the formability of a plate. The evaluation method comprises the following steps: S1, preparing a standard dumbbell-shaped uniaxial tensile sample; s2, preparing a plane strain tensile sample; s3, performing uniaxial tension on the standard dumbbell-shaped uniaxial tension sample; s4, performing uniaxial tension on the plane strain tensile sample; s5, calculating abscissa and ordinate values of three key feature points in the forming limit curve according to the material thickness t, the first correction coefficient and the second correction coefficient; s6, correcting the numerical value of the ordinate in the key feature point by using the first correction coefficient and the second correction coefficient to obtain a corrected ordinate; s7, drawing a forming limit judgment curve; and S8, the forming limit judgment curve is input into finite element simulation analysis software. The method greatly improves the analysis efficiency and prediction precision of the formability of the sheet metal, is especially suitable for the occasion of forming analysis of metal sheet parts, and widely meets the application requirements of engineering practice and scientific research work.

The application discloses a strip filling body damage mode plane strain testing device and method. The testing device comprises a container (10), a containing cavity (101) with an open end, and at least one end face of the container (10) is a transparent face; a test piece (20) provided with a speckle on the surface and arranged in the containing cavity (101); a loader (30) comprising a pressing column (31) and arranged at the open end of the container (10) and configured to apply a load to the test piece (20); and a digital speckle device (40) comprising a high-definition camera (41) arranged at the transparent face of the container (10) and configured to acquire deformation image information of the test piece (20), analyze and calculate the image information to obtain stress and strain values of the test piece (20), and combine the stress and strain values with the image to analyze and obtain a damage mode of the test piece (20).

The application discloses a hydraulic fracture translayer extension simulation method based on DDM-perturbation iteration coupling, belongs to the field of oil and gas field development engineering, and aims to solve the problem of insufficient simulation precision of asymmetric translayer extension of a horizontal well hydraulic fracture in stratified non-uniform rock mass. The method is based on a plane strain assumption, constructs a stratified rock mass model containing stratified fracture toughness, establishes a mechanical equation through a displacement discontinuity method (DDM), introduces a perturbation iteration method to dynamically adjust flow distribution, automatically adapts to new rock layer fracture toughness to update and expand criteria during translayer, and outputs vertical extension form and parameters. The method can be used for simulating translayer behavior of a horizontal well vertical fracture, improving calculation precision and efficiency, and providing a reliable tool for fracturing design of shale gas reservoirs and the like.

The invention provides a slope overall process analysis method based on a mathematical optimization particle finite element method, which comprises the following steps of: establishing a control equation of quasi-static and dynamic elastic-plastic problems under a plane strain condition in a slope region, and converting the control equation into a minimum-maximum optimization problem according to a Hellinger-Reissner variation principle, therefore, a complex motion form in the slope area is converted into a simple minimum-maximum optimization problem; finite element discrete analysis is carried out on the minimum-maximum optimization problem, then a standard second-order cone programming problem is constructed, and then an optimal solution of the second-order cone programming problem can be rapidly obtained through an interior point method, namely, a state variable is obtained; and according to the state variables and in combination with a particle finite element method, calculating the motion state before and after slope instability, thereby obtaining the whole-process operation state of the slope. The analysis method provided by the invention not only can judge the safety and stability of the slope in the static state, but also can simulate and analyze the movement process after the slope is damaged.

The invention discloses a rolling edge crack forecasting method suitable for a cold rolling mill, and the method comprises the following steps: calculating and solving a front tension distribution array through a plate shape model based on the equipment characteristic parameters of the cold rolling mill and the rolling process parameters of the cold rolling mill; calculating a critical stress intensity factor of the crack tip according to the front tension distribution array and the current crack length based on a linear elastic fracture mechanics theory; calculating a correction stress intensity factor of the current unit after shape correction; calculating the crack propagation energy release rate of the current unit based on the corrected stress intensity factor, thereby calculating the propagation displacement of the crack tip under the plane strain condition; and whether the correction stress intensity factor # imgabs0 # of the current unit subjected to shape correction is true or not is judged, then the final solution of the crack propagation displacement is obtained, namely, the strip steel edge crack length is obtained, and the method has important practical significance for improving the rolling quality and efficiency. The edge crack forecasting method is accurate and easy to implement.

A rolling load distribution calculation method for a rolling mill (10) comprises the steps of: calculating the rolling load distribution of a rolling mill (10) on the basis of the Hooke's law of the plane strain state of a material to be rolled (1) and the balance of the force in the roll gap of the rolling mill (10) by using a rolling direction stress distribution approximated by a function dependent on the position coordinates of the rolling direction of the rolling mill (10); calculating the contact arc length of at least one of the elastic recovery area and the elastic depressed area; and calculating a rolling load distribution of at least one of the elastic recovery region and the elastic depression region on the basis of the contact arc length.

The present invention provides a method and system for predicting the fracture toughness of a steel material, a device, and a medium. The method comprises: acquiring carbon content distribution data of a steel material under test, selecting a carbon content from the carbon content distribution data and designating same as a target carbon content; calculating upper shelf impact energy and a temperature offset of the target carbon content by means of a first calculation model; generating a fracture toughness curve for the target carbon content on the basis of the upper shelf impact energy and the temperature offset; calculating tensile strength corresponding to the target carbon content by means of a second calculation model, and calculating yield strength corresponding to the target carbon content by means of a third calculation model; generating a blunting line equation for the target carbon content on the basis of the tensile strength and the yield strength; on the basis of the fracture toughness curve and the blunting line equation, generating plane-strain fracture toughness corresponding to the target carbon content; and collecting statistics about the plane-strain fracture toughness corresponding to each target carbon content to generate fracture toughness data of the steel material under test. The present invention can provide input for assessment of the ductile tearing failure of carbon-segregated structures.

The invention discloses a biaxial test device, comprising: a bracket, a container, a sample setting assembly and a press, etc. Before use, the sample is installed between two limit plates. On the basis of applying confining pressure, the press is started, and the pressure rod moves vertically downward and applies a vertical downward load to the sample. When the sample is subjected to the vertical downward load, axial compression and radial deformation will occur. At this time, the radial deformation of the sample on both sides of the limit plates is limited, and expansion occurs on both sides without the limit plates. Subsequently, under the joint action of the confining pressure and the limit plates, the sample undergoes plane strain. Since the container and the limit plates are both in a transparent state, the side section state of the sample when plane strain occurs can be well observed. At the same time, the multiphase mixed fluid in the mixing container penetrates into the rock sample inside the sample and flows out through an output pipeline and is tested and analyzed by external equipment, so that the potential influence of multiphase seepage on the mechanical behavior of rock mass can be studied under plane strain conditions.

The application provides a microcapsule self-repairing material constitutive curve prediction method and device, and relates to the technical field of tunnel and underground engineering materials, and aims to solve the problem that the mesoscopic mechanics model cannot reflect and predict the softening stage after the peak value of a cement-based material in the prior art. The method comprises the following steps: if the self-repairing concrete material is a conventional concrete material, calculating the constitutive curve of the conventional concrete material under tensile load in a plane strain condition; if the self-repairing concrete material is a microcapsule self-repairing concrete material containing a strong healing agent, calculating the constitutive curve of the microcapsule self-repairing concrete material containing the strong healing agent under tensile load in a plane strain condition; and if the self-repairing concrete material is a microcapsule self-repairing concrete material containing a weak healing agent, calculating the constitutive curve of the microcapsule self-repairing concrete material containing the weak healing agent under tensile load in a plane strain condition. The microcapsule self-repairing material constitutive curve prediction device is applied to the microcapsule self-repairing material constitutive curve prediction method.

The invention discloses a calculation method for predicting operation subway tunnel deformation caused by overlapped line shield construction, and the method comprises the following steps: obtaining soil body real source deformation caused by a shield tunnel based on a two-dimensional plane strain model and a mirror image source sink principle; performing superposition correction on the real source and the mirror image source to obtain a plane strain correction formula of any point; solving the soil displacement of an operation tunnel node during the lower hole construction period of the stacked line tunnel; the soil body displacement is converted into an additional load to act on the operation tunnel structure, and a first operation subway tunnel predicted deformation value caused by lower tunnel construction is obtained; solving the soil body displacement of the operation tunnel node during the upper hole construction period of the stacked line tunnel; and converting the soil body displacement into an additional load to act on a calculation result of the upper stage, and obtaining a predicted deformation value of the operating subway tunnel caused by upper hole construction. The invention provides an important calculation method for deformation prediction in the design construction process. The method is safe, efficient and rapid in calculation.

The invention discloses a testing method for measuring longitudinal residual stress of deformed steel bar with the diameter larger than 15 mm, and belongs to the technical field of residual stress detection of metal materials. The method comprises the following steps: 1) sample preparation: cutting a deformed steel bar sample with the length of 50 + / -0.5 mm, and cutting off heat affected zones at two ends by using a grinding machine; a plane with the width larger than or equal to 10 mm is ground in the middle of the sample in the longitudinal rib axis direction; (2) pasting strain gauges; (3) stress release and measurement: two parallel grooves symmetrical about the strain gauge are cut by a wire cutting machine, the distance between the two cutting lines is 16-20mm, the cutting depth of the two cutting lines is 1 / 2 of the diameter of the sample, and longitudinal residual stress is released; and an AFT-CM-10 static resistance strain gauge is used for recording the strain change value delta epsilon before and after cutting. According to the invention, high-precision and low-cost longitudinal residual stress detection is realized by optimizing sample treatment, a polishing process and a testing process.

The invention provides a GISSMO model parameter calibration method and system based on a local formability characterization test. The method comprises the steps that fracture strain data and a load-displacement curve of a material in four stress states of shearing, plane strain, uniaxial stretching and equal biaxial stretching are obtained through the local formability test; based on the obtained fracture strain data and the corresponding stress three-axis degree, fitting to obtain a stress three-axis degree-fracture strain curve of the material; inputting the obtained stress triaxial-fracture strain curve and a large deformation equivalent stress-strain curve obtained through a shear test into a material model of finite element simulation software; and taking the obtained load-displacement curve as a target curve for simulation optimization, and calibrating damage parameters of the GISSMO model by using an optimization algorithm to obtain GISSMO damage model parameters. According to the method, a complete solution is formed through process optimization, and finally, the accuracy, reliability and efficiency of parameter calibration of the GISSMO model are comprehensively improved.

This invention belongs to the field of material and structural performance testing technology, specifically relating to a method for estimating the plane strain fracture toughness of materials based on small specimens and energy principles. The method includes the following steps: S1, designing small specimens for fracture toughness testing; S2, conducting fracture toughness testing; S3, analyzing the fracture morphology of the small specimens; S4, calculating the energy consumed per unit area in each region; and S5, calculating the plane strain fracture toughness of the material. The method described in this invention for estimating the plane strain fracture toughness of materials based on small specimens and energy principles can significantly improve the efficiency of obtaining plane strain fracture toughness and save on related experimental costs. Furthermore, the entire process is simple, convenient, and fast, with strong engineering practicality and applicability.

The invention discloses a steel billet forming process parameter testing method and device, a medium and equipment. The method comprises the following steps: a first acquisition step: acquiring an initial billet model; a second acquisition step: performing a flanging process test on the billet model to acquire a target area of the billet model and a secondary strain vector of a maximum thinning rate position in the target area, the target area being an area in a tensile strain state in the billet model; and an adjustment step: adjusting the contour of the target area according to the secondary strain vector, and re-executing the second acquisition step after the contour of the target area is adjusted. And a determining step: circularly executing the second obtaining step and the adjusting step until the parameter value of the obtained target secondary strain vector is less than or equal to a preset parameter threshold value, obtaining the target contour of the billet model, and converting the target area into a plane strain state when the parameter value of the target secondary strain vector is less than or equal to the preset parameter threshold value. The embodiment of the invention can improve the formability of the steel billet.

The invention provides a special-shaped grouting anchor rod supporting system and a model selection construction method, and belongs to the technical field of underground engineering. The method comprises the steps that firstly, physical and mechanical parameters of surrounding rock, grouting and a supporting structure are obtained; then a plane strain mechanical analysis model of the tunnel-grouting body-surrounding rock-supporting structure is established; a finite element numerical simulation calculation model is established based on the model, and mechanical responses of various special-shaped grouting body sections under the same grouting amount are analyzed; comprehensively evaluating and preferably selecting an optimal grouting body section form by taking mechanical response data as a judgment index and adopting a multi-index decision-making method such as an analytic hierarchy process; and finally, anchor rod arrangement and grouting parameters are determined according to the optimized section for construction, and a closed special-shaped grouting body is formed. According to the special-shaped grouting anchor rod supporting system and the model selection construction method, active optimization of surrounding rock stress distribution is achieved, plastic zone development and tunnel deformation are effectively controlled, and the supporting effect and economical efficiency are improved.

The invention discloses a method for calculating the working resistance of a temporary support unit bracket for gob-side entry retaining. The method comprises the following steps: S1, acquiring roof related parameters, coal body related parameters, roadside support body related parameters and unit bracket arrangement parameters; s2, simplifying the basic roof into a plane strain beam structure, and constructing a basic roof bending moment calculation formula; s3, determining an X0 coordinate corresponding to the maximum bending moment position according to the basic top bending moment calculation formula constructed in the S2 in combination with related parameters of the top plate, and defining the position corresponding to the X0 as a basic top fracture position; s4, establishing a mechanical equilibrium formula according to the fracture position of the basic roof, the relevant parameters of the roadside support, the arrangement parameters of the unit bracket and the relevant parameters of the coal body to calculate the supporting force of the unit bracket on the roof; and S5, correcting the supporting force of the unit brackets on the top plate according to the center distance between two adjacent unit brackets and the utilization rate of the working resistance of the unit brackets to obtain the minimum value of the working resistance of the unit brackets. And related personnel can be helped to quickly estimate the temporary support resistance requirement beside the roadway.

The application provides a special-shaped grouting anchor rod supporting system and a selection construction method, and belongs to the technical field of underground engineering. The method first acquires physical and mechanical parameters of surrounding rock, a grouting body and a supporting structure; then a plane strain mechanical analysis model of a tunnel-grouting body-surrounding rock-supporting structure is established; based on the model, a finite element numerical simulation calculation model is established to analyze the mechanical response of various special-shaped grouting body sections under the same grouting amount; then, the mechanical response data are used as a judgment index, a multi-index decision method such as an analytic hierarchy process is adopted, and the optimal grouting body section form is comprehensively evaluated and optimized; finally, according to the optimized section, the anchor rod arrangement and grouting parameters are determined for construction to form a closed special-shaped grouting body. The application adopts the special-shaped grouting anchor rod supporting system and the selection construction method, realizes active optimization of the stress distribution of the surrounding rock, effectively controls the development of the plastic zone and the tunnel deformation, and improves the supporting effect and economy.

The application discloses a highway side slope compensation tensioning equipment slip clamp parameter calculation method, equivalent slip teeth are regarded as contact bodies acting on a working anchor; the contact between the slip teeth and the working anchor is equivalent to plane strain, and then a slip tooth-working anchor friction contact model is constructed; when the deformation energy of a metal material reaches the deformation energy required by metal material yielding, the metal material will yield or brittlely break; a slip tooth-yield strength model is constructed in this way; and the slip clamp with parameters meeting stress requirements is selected in combination with the need of an engineering safety factor. The method combines geotechnical engineering theory, Hertz contact mechanics theory, tribology and elastic-plastic mechanics theory to first provide a calculation method of a clamp of a highway side slope engineering prestressed anchor cable compensation tensioning equipment; the clamp material of the anchor cable compensation tensioning equipment is improved through calculation, the equipment range is improved, the anchor cable with a larger tonnage in the original design is applicable, the fatigue life of the slip clamp is increased, and the design parameters are optimized.

The embodiment of the present application provides a kind of prediction method of sheet forming performance.The method comprises: obtaining the mechanical property parameters of candidate sheet and forming limit curve;According to the forming limit curve, select target theoretical model from at least one candidate theoretical model;According to the mechanical property parameters of the candidate sheet and the target theoretical model, the finite element simulation of target part forming process is carried out, the simulation strain when the target part simulation cracks is determined, and the lowest forming limit curve is generated;Obtain the plane strain point in the lowest forming limit curve, and according to the plane strain point and the target theoretical model, the forming performance prediction of the candidate sheet is completed.The technical scheme of the embodiment of the present application can predict the forming performance of the sheet for a specific part forming process.

The invention relates to the technical field of geotechnical engineering and road engineering, in particular to a calculation method suitable for bag pipe method grouting lifting roadbed soil body additional stress. A soil body stress field caused by bag pipe grouting is decomposed into a classical Lame solution (field B) of internal pressure borne by a drill hole in an infinite body and a correction stress field (field C) introduced for eliminating free surface stress; the method comprises the following steps of: establishing a rectangular coordinate system, converting a stress component under polar coordinates into a rectangular coordinate form, and respectively calculating stress fields caused by vertical and shear distribution loads by utilizing a Flamant solution and a horizontal point load influence function under a plane strain condition; and finally, the additional stress distribution caused by the bag pipe grouting in the semi-infinite soil body is obtained through the stress solution of the superposition field B and the field C. The method has the advantages that the coupling effect of the drill hole boundary and the free surface is considered, the method is suitable for stress prediction and control in roadbed lifting engineering, and the method is rigorous in theory and high in calculation precision.

The application discloses a pipeline structure health monitoring and landslide early warning method and system, and the method comprises the following steps: S1, a centrifugal simulation test platform is built; S2, strain data collected by the centrifugal simulation test platform is acquired; S3, based on plane strain theory, the collected strain data is pretreated, including main strain calculation, azimuth calculation and data denoising; S4, data analysis is carried out on the pretreated data, including coupling law analysis and parameter influence quantitative analysis, and key influence laws are obtained; and S5, based on the key influence laws, early warning criteria are customized, and finally, a two-level early warning system is built, so that the real-time calculation and early warning of the azimuth and the main strain are realized. The application combines the main strain amplitude and the spatial azimuth, makes up for the defects that the traditional method only analyzes the strain size and ignores the direction, and realizes the accurate quantitative analysis of the mechanical response under the three-dimensional multi-axial stress of the pipeline.

The present application relates to geotechnical engineering and road engineering technical field, especially a kind of additional stress calculation method suitable for capsule pipe method grouting lifting roadbed soil body, based on the superposition principle in elasticity, the soil stress field caused by capsule pipe grouting is decomposed into the classic Lame solution (field B) of the borehole under internal pressure in infinite body and the correction stress field (field C) introduced to eliminate the stress of free surface;By establishing rectangular coordinate system, the stress component under polar coordinates is converted into rectangular coordinate form, and the stress field caused by vertical and shear distribution load is calculated respectively by using Flamant solution and horizontal point load influence function under plane strain condition;Finally, the additional stress distribution caused by capsule pipe grouting in semi-infinite soil body is obtained by superimposing the stress solution of field B and field C.The present application has the advantages that the coupling effect of borehole boundary and free surface is considered, it is suitable for stress prediction and control in roadbed lifting engineering, and it has the advantages of rigorous theory and high calculation precision.

The invention relates to the technical field of compressed air energy storage underground cavern construction, in particular to a large tank type gas storage burial depth calculation method and device and a medium. According to the method, a research object of an existing cone failure model is expanded from a two-dimensional level to a three-dimensional level, and under the condition that an overlying rock mass of a large tank type gas storage is assumed to have lift-resistant failure along a fixed fracture angle in the circumferential direction of a vault, the overlying rock mass assumed to have lift-resistant failure along the fixed fracture angle is divided into a first entity and a second entity; the second entity is an overlying rock mass which is subjected to lifting-resistant damage in the vertically upward direction at the position where the large-tank type gas storage cracks under the action of the lifting-resistant damage, and the first entity is an external hollow frustum body which is left after the second entity is excavated from the overlying rock mass subjected to the lifting-resistant damage; on the basis of an original plane strain model, a space size effect is introduced to reestablish a space stress balance equation, so that the safe burial depth of the large-tank gas storage is solved, and the blank of an existing burial depth calculation model of the large-tank gas storage is filled.

The present invention relates to the field of titanium alloy material preparation, and particularly relates to a method for preparing and detecting a plane strain specimen of a medium-hard α inclusion material in a titanium alloy. The method comprises the following steps: (1) preparing TiN inclusion bulk materials with different nitrogen contents by using hot isostatic pressing technology; (2) machining a cube plane strain specimen by wire cutting; (3) preparing a plane strain specimen with a nitrogen content of less than 12 wt%; (4) performing plane strain performance testing by using a high-temperature hot compression testing machine, wherein the testing temperature is room temperature and the strain rate is 0.01S ‑1 ~10S ‑1 . Thus, the thermal deformation characteristic data of TiN materials with different nitrogen contents can be accurately detected, the key technologies for preparing and detecting plane strain specimens of TiN inclusion materials can be broken through, and the "bottleneck" problem of China's independent airworthiness system can be solved.