2795results about "Material strength using steady bending forces" patented technology

The present invention relates to an umbilical cable bending stiffness testing device and method. The device comprises a workbench; a measuring groove is formed in the top of the workbench; a fixing assembly is arranged in the measuring groove, and the fixing assembly is used for fixing two ends of an umbilical cable; a mounting plate is fixedly connected to the bottom of the workbench; a mounting frame is fixedly connected to the upper surface of the mounting plate; a threaded rod is rotatably connected between the lower surface of the mounting frame and the upper surface of the mounting plate; obtained data is transmitted to a dynamic data acquisition system by means of a displacement monitor body; the dynamic data acquisition system calculates obtained parameters to obtain bending stiffness curves of the umbilical cable under different curvatures. Moreover, because the device is in rigid connection with the umbilical cable by means of two sets of hoops, the problem of stress concentration caused by flexible connection of a steel strand rope is avoided, and the rigid connection ensures that tensile loads can be applied to two points of the umbilical cable in a balanced manner during an experiment, thereby improving the accuracy of bending stiffness testing results.

The invention discloses a metal material welding performance testing device and testing method, and belongs to the technical field of welding testing devices. The metal material welding performance testing device is characterized by comprising a workbench, a fixed clamp is arranged at one end of the workbench, a movable clamp is arranged at the other end of the workbench, and a loading mechanism is arranged between the fixed clamp and the movable clamp; the fixed clamp comprises a fixed seat, the movable clamp comprises a movable seat, and a power structure for driving the movable seat to slide on the supporting table is arranged on the supporting table; clamping mechanisms for clamping a workpiece are arranged on the fixed seat and the movable seat, a vibration structure for applying vibration to the workpiece is arranged in the center of the clamping mechanism on the fixed seat, and the vibration structure is located in the workpiece. By adopting the device and the method for testing the welding performance of the metal material, disclosed by the invention, the problem that an existing testing device cannot be used for testing the tensile property and the compressive property of a welded suspension arm under the condition of multi-load loading can be solved.

The invention relates to a concrete degradation simulation method and system under continuous load-chloride ion coupling, and solves the problems that systematic research on overall mechanical property degradation of a concrete structure under the load and chloride ion coupling effect is lacked, and the degradation condition of the concrete structure in an actual service environment is difficult to comprehensively reflect. The method comprises the following steps: applying a continuous load to a test block, preparing a solution according to a stress type to determine a chloride ion diffusion direction, applying an electric field to accelerate migration and maintain test stability, and after an experiment, measuring the penetration depth and calculating a diffusion coefficient; in the process, multi-dimensional data such as cracks and acoustic emission are collected and subjected to PCA dimension reduction and redundancy removal, then damage factors are inversed through deep learning modeling in combination with dual-stage optimization and physical constraint, and finally damage and chloride ion parameters are fused to form gradient parameters fitting actual degradation. The method has the following effects that the concrete degradation process is accurately simulated, a basis is provided for durability evaluation and life prediction, and the engineering safety and economy are improved.

The invention relates to the technical field of monitoring, in particular to a cable aging monitoring and early warning method and system. The method comprises the following steps: acquiring cable monitoring data, and performing electrical characteristic analysis to obtain electrical characteristic data; performing conductor oxidation analysis based on the electrical characteristic data to obtain conductor oxidation data; cable image feature extraction is carried out according to the cable monitoring data, cable morphology type division is carried out, and curve segment cable data and winding segment cable data are obtained; performing bending fatigue analysis on the curve section cable data to obtain bending fatigue data; performing winding stress analysis on the winding section cable data to obtain winding stress data; performing material damage evaluation according to the bending fatigue data and the winding stress data to obtain material damage data; and carrying out damage position identification according to the material damage data to obtain damage position data. The cable aging monitoring accuracy and the early warning response rate are improved based on the monitoring technology.

The invention relates to the technical field of PCB detection, and discloses an online defect detection method and system in the PCB production process and computer equipment, the detection accuracy can be improved by combining production parameters, image information and a design circuit diagram, potential defects can be found in the early stage, the PCB is divided into a plurality of areas, and the detection efficiency is improved. According to the PCB, each area can be independently welded and detected, the complexity of the whole PCB is reduced, the PCB is divided into a plurality of areas which are detected one by one, a specific defect area can be effectively positioned, through the regionalized detection and maintenance process, the unqualified area can be locally processed, the production efficiency is improved, and the production cost is reduced. By adopting the strategy based on multi-round detection, feedback and regional repair, through accurate positioning, local repair, detection efficiency improvement and automatic processing, the rejection rate of unqualified products is greatly reduced, the maintenance success rate is improved, and the problems of difficulty in PCB defect detection and resource waste in the prior art can be effectively solved.

The invention relates to the technical field of ultra-high performance concrete, particularly discloses a fatigue performance evaluation method for a steel-UHPC combined bridge deck slab, and is used for solving the problem that the fatigue damage evolution process of the steel-UHPC combined bridge deck slab in the life cycle is difficult to accurately predict due to the fact that an existing evaluation method does not consider the influence of structural fatigue performance degradation. And the evaluation result is likely to be unsafe. According to structural parameters and material attributes of a reinforced UHPC layer, fatigue performance evaluation of a reinforced UHPC component under the action of an axial tension fatigue load is carried out, fatigue performance analysis of a stud connecting piece in ultra-thin UHPC under the action of a shear fatigue load is carried out, bending fatigue performance analysis of a steel-UHPC-pavement composition board is carried out based on a five-point bending test, and the bending fatigue performance of the steel-UHPC-pavement composition board is analyzed. And a time-varying fatigue analysis framework of the steel-concrete composite effect degraded steel-UHPC composite bridge deck is established, so that the evaluation result is more reliable, and the risk of unsafety is reduced.

The present disclosure relates to an apparatus and method for measuring an elastic modulus. The method of measuring an elastic modulus of a specimen including a conductive material and an insulating material with which a surface of the conductive material is coated includes a first bending test operation of applying a first load to a first surface of the specimen, a second bending test operation of applying a second load to a second surface that meets the first surface of the specimen, a first calculation operation of calculating a first bending elastic modulus of the specimen based on a first value measured in the first bending test operation, a second calculation operation of calculating a second bending elastic modulus of the specimen based on a second value measured in the second bending test operation, and a third calculation operation of calculating an elastic modulus of the conductive material and an elastic modulus of the insulating material based on the calculated first bending elastic modulus and the calculated second bending elastic modulus.

The invention provides an analysis method and system for dynamic fracture of a quasi-brittle material. The method is used for solving the technical problem that an existing method is insufficient in dynamic fracture capturing capacity in quasi-brittle materials. The method comprises the following steps: constructing a representative volume element RVE of a quasi-brittle material with two embedded fracture planes; a dual-scale model of the RVE is constructed, the dual-scale model comprises a macroscale sub-model and a mesoscale sub-model, and the crack traction force and the displacement jump increment in the mesoscale sub-model meet the rate-dependent cohesive friction law; identifying the parameters of the dual-scale model; and embedding the dual-scale model into finite element software to simulate the dynamic fracture of the quasi-brittle material. The contained mesoscale crack plane has the key characteristics of the dynamic fracture behavior of the quasi-brittle material, and has remarkable advantages compared with a classical empirical model.

The invention discloses a prefabricated pipe pile connection node mechanism character intelligent sensing system and method, and relates to the field of engineering monitoring, the prefabricated pipe pile connection node mechanism character intelligent sensing system comprises the following steps: an intelligent sensing module is used for embedding an intelligent sensing sensor at a corresponding position of a pile body, and the sensor is used for accurately sensing the strain and the inclination angle of a connection node; the data acquisition module is used for acquiring data from a sensor, and the data acquisition module adopts a high-precision data acquisition card and transmits the data to the data analysis and processing module through a built-in data transmission protocol; the analysis and processing module is used for carrying out filtering processing on the collected data, calculating the axial force, the bending moment and the inclination angle at a connecting node through a built-in algorithm, comparing the axial force, the bending moment and the inclination angle with preset parameter values, and carrying out stability checking calculation and prejudging the condition of a pile body; and the feedback and early warning module is used for generating a real-time feedback signal according to a calculation result of the processing and analysis module, displaying the real-time feedback signal to construction personnel through mobile equipment, and giving an alarm according to a preset safety threshold.

The invention provides a cable bending fatigue life prediction method and system based on reinforcement learning, and relates to the technical field of cable life prediction, and the method comprises the steps: collecting cable test sample data, calculating a stress distribution field and a strain distribution field, constructing a stress intensity factor calculation module, and calculating a crack propagation track and rate. A damage evolution tensor is constructed as a state feature, a network is trained based on a deep Q learning algorithm, uncertainty is quantified by adopting a Markov chain Monte Carlo method, and a credible interval and an early warning threshold are established.

The invention relates to the technical field of hard alloy tool bit machining, in particular to a hard alloy tool bit performance detection device which comprises a fixing mechanism, a wear resistance detection mechanism and a bending resistance detection mechanism, the wear resistance detection mechanism and the bending resistance detection mechanism are mounted on the fixing mechanism, and the fixing mechanism comprises a bottom table, a support and a fixing assembly, and the support and the fixing assembly are mounted on the bottom table. The alloy tool bit is primarily clamped and fixed through the clamping part, and when the first hydraulic push rod pushes the connecting disc to move rightwards to conduct friction testing on the alloy tool bit, the pushing rod is used for pushing the clamping part to conduct secondary clamping and fixing on the testing end of the alloy tool bit; and then the pushing rod and the hollow circular ring are connected and locked through the connecting part, and through linkage matching of the hollow circular ring, the clamping part, the pushing rod and the connecting part, the relative stability of the friction block and the alloy tool bit during detection is improved, and then the detection accuracy is improved.

The invention relates to the technical field of palm fiber testing, in particular to a palm fiber bending elasticity testing device based on multi-angle adjustment, which comprises a clamping device, a point position adjusting assembly, an angle adjusting assembly and a loading device, the clamping device is arranged above the electronic scale; the point location adjusting assembly is connected with the base; the angle adjusting assembly is connected with the clamping device; the loading device is connected with the point location adjusting assembly; through the point position adjusting assembly and the angle adjusting assembly, bending elasticity testing of different point positions and different angles can be achieved, in the testing process, the loading assembly can drive the clamping assembly to increase the clamping force on the palm fibers along with increase of the bending variation of the palm fibers, it is guaranteed that the palm fibers do not slip or twist in the testing process, and the detection precision is improved; the problems that in the palm fiber testing process, torsion and slippage can occur along with the increase of the bending amount, so that the testing result is inaccurate, and single-point single-angle testing cannot reflect the elasticity of the palm fiber practically are solved.

The invention relates to the technical field of semiconductor device packaging, in particular to a packaging structure, a packaging test method and a packaging test system of a large-scale photon chip. The upper surface of the substrate is connected with a chip layer through a first bonding structure, the chip layer comprises a plurality of optical chips, adjacent first and second side edges of the optical chips are relatively parallel to corresponding side edges of the other two adjacent optical chips, and a first gluing area is formed by filling a gluing material between the two oppositely arranged side edges; the outward side edge of the photon chip is bonded with a bonding material which extends to form a second bonding area, and the silicon adapter plate is arranged corresponding to the first connecting area of the optical chip; and a first wiring layer is arranged between the lower surface of the silicon adapter plate and the cementing layer. The splicing structure provided by the invention can reduce the preparation difficulty of large-scale optical chips.

The invention provides an electronic product testing method and system, and the method comprises the steps: exerting a periodic bending load on a flexible electronic product, generating a standard bending load spectrum, attaching a strain sensitive marking layer, collecting the distribution data of a strain field, and enabling a flexible circuit impedance dynamic monitoring probe to be connected with a conductive circuit of the flexible electronic product, thereby achieving the testing of the flexible electronic product. Generating an impedance dynamic response spectrum, aligning mechanical bending parameters in the standard bending load spectrum with the dynamic strain field distribution data and the acquisition time of the impedance dynamic response spectrum, and generating a time sequence association data set; and analyzing the spatial position matching degree and the time correlation between the local strain concentration region under the preset bending phase and the impedance sudden change event of the corresponding conductive circuit in the impedance dynamic response spectrum, and determining the mapping rule of the flexible electronic product so as to judge the failure mode of the flexible electronic product under the composite bending path. The method improves the guiding value of the test result for the product design, and improves the reliability and service life of the electronic product.

The invention belongs to the technical field of PCB testing, and discloses a performance testing method of an AI server PCB. Comprising the following steps: acquiring power-on operation temperature data of the PCB to construct a temperature distribution image, determining hot spot region characteristics based on the temperature distribution image to obtain heating test parameters, performing heating test on the PCB based on the heating test parameters, acquiring thermal resistance of each position of a hot spot region, drawing a thermal resistance characteristic curve, and analyzing the thermal resistance characteristic curve to obtain a thermal performance grade of the PCB. The bending rate of the bending test is determined according to the basic parameters of the PCB, the bending force is adjusted in real time according to the bending rate during the test, the test is stopped when the stress or the strain reaches a threshold value, the test data is analyzed to obtain the bending resistance grade of the PCB, and the PCB is divided into different grades by combining the thermal performance grade. According to the method, the efficiency and reliability of PCB testing are remarkably improved.

According to the three-point bending high-temperature fatigue test instrument and method based on X-ray in-situ imaging, an extreme thermal field is applied to a sample based on halogen lamp infrared radiation focusing heating, a clamp ascends and descends through a servo hydraulic cylinder, and axial displacement of the ends of the sample is converted into bending moments at the two ends through the rotation characteristic of a connecting rod mechanism; therefore, a monotonous or cyclic bending external load is applied to the sample. Meanwhile, an oxidizing or inert test gas atmosphere is provided. And the acoustic emission system monitors the material damage failure starting time in real time. The device is small in size, high in precision and fast in response, and provides technical support for the damage evolution process characterization and failure damage mechanism research test of the tested sample under the heat-force-oxygen multi-field coupling action by combining a three-dimensional high-temporal-spatial-resolution X-ray characterization technology.

The invention discloses a testing machine for fatigue bending resistance of a piston rod of a hydraulic hoist, and relates to the technical field of hydraulic hoist detection equipment, the testing machine comprises a bottom plate, and a vertical impact simulation assembly and a horizontal impact simulation assembly for simulating impact loads in the vertical and horizontal directions are arranged above the bottom plate. According to the testing machine for the fatigue bending resistance of the piston rod of the hydraulic hoist, through the arrangement of the vertical impact simulation assembly and the horizontal impact simulation assembly, instant impact loads encountered by the piston rod of the hydraulic hoist in actual work, such as water flow impact and sudden blocking of a gate, can be accurately simulated; the defect that only static or stable cyclic bending loads are concerned in a traditional test is overcome, the test environment is closer to the real working state of the piston rod, meanwhile, after the test is finished, the vertical impact simulation assembly and the horizontal impact simulation assembly are matched, the piston rod clamped on the clamping base can be rapidly taken out, and the automatic material taking efficiency is high.

The invention discloses a flexible circuit board production quality monitoring method and system based on data feedback, and the method comprises the steps: collecting the physical parameters of development etching, drilling and copper plating processes, such as line width, line distance, aperture, roundness and copper thickness, and workshop temperature and humidity and dust concentration data; generating a single-variable control chart for a single-process physical parameter, generating a multivariable T2 control chart for a multi-coupling parameter process, and calculating a process stability index and a comprehensive fluctuation index; inputting the abnormal data into a BP neural network, identifying an abnormal mode type and outputting characteristic parameters; generating a parameter correction instruction according to the abnormal mode and the characteristic parameters, and adjusting equipment parameters in real time; recalculating the process capability index based on the adjusted data, and triggering secondary feedback if the process capability index does not reach the standard; and dynamically adjusting the threshold value of the control chart according to the standard deviation and the mean value of the process capability indexes of the continuous batches. Production key parameters are comprehensively covered, abnormity is found in time, accurate and comprehensive detection is achieved, real-time adjustment is achieved, stability and controllability are ensured, and the product quality is improved.

The invention relates to a deflection testing device and a testing method thereof, and relates to the technical field of cable physical property testing. The flexing mechanism is arranged on the rack; the deflection mechanism comprises a driving assembly, a bending assembly, a clamping assembly and a torsion assembly. Wherein the bending assembly is used for driving a cable to bend in a reciprocating manner; the clamping assembly is used for clamping the cable; the twisting assembly is used for driving the clamping assembly and the cable to twist back and forth; the driving assembly is used for driving the bending assembly and the twisting assembly to operate synchronously. And the monitoring mechanism is arranged on the rack and is used for monitoring the change of the electrical performance of the cable in the testing process in real time. The device has the effects that the operation convenience of workers is improved, the number of power sources needed during equipment operation is reduced, and the equipment maintenance difficulty is lowered.

The invention provides a mechanical in-situ test experimental device with a multi-working-condition simulation coupling effect, and belongs to the field of mechanical testing. The problems that an existing mechanical property testing device can only simulate single environment characteristics and cannot test various mechanical properties are solved. Wherein the linear sliding table is connected with the mobile platform through the mounting bracket, the upper end of the connecting rod is fixedly connected to the mobile platform, and the lower end is positioned in the box body; any one of one of the stretching and fatigue experiment clamp, the bearing platform and the bending pressing table can be mounted on a bottom plate of the box body, and any one of the other stretching and fatigue experiment clamp, the compression pressing head, the hardness measuring head, the bending pressing head and the impact testing head assembly can be mounted at the lower end of the connecting rod; the environment simulation assembly can simulate the temperature, humidity and salt mist environment of actual working conditions in the box body; the in-situ monitoring assembly can be used for monitoring the to-be-tested sample in the box body in real time. The device can simultaneously simulate a plurality of actual working conditions and coupling working conditions of actual loads, and can complete a plurality of mechanical property tests.

An evaluation method for new and old asphalt fusion of recycled asphalt mortar comprises the following steps: firstly, pulping oil-rich RAP fine materials subjected to refined separation and new asphalt, obtaining partially fused recycled asphalt mortar with different fusion degrees on site, and preparing completely fused recycled asphalt mortar for comparison; secondly, obtaining low-temperature rheological indexes at different temperatures by adopting a bending beam rheological test; drawing a low-temperature main curve according to the obtained low-temperature rheological indexes based on a time-temperature equivalence principle; and finally, evaluating the similarity between the low-temperature main curve of the mortar with different fusion degrees and the completely fused standard curve by adopting the Frechet distance, thereby serving as an evaluation method for new and old asphalt fusion of the recycled asphalt mortar. According to the method, the fusion degree of the new and old asphalt in the recycled asphalt mortar is evaluated through an in-situ technology, and the problems that an existing new and old asphalt fusion simulation test is not matched with the actual situation, an extraction test has negative effects on new and old asphalt fusion evaluation, and a microscopic test is high in price and not easy to operate are solved.

The invention relates to the technical field of pipe strength detection, and particularly provides a PEXA pipe strength detection table which comprises a base, a constant temperature box, a water injection detection mechanism, a supporting plate and an adjusting simulation mechanism. The end, connected with the moving plate, of the pipe is adjusted through cooperation of the rotary locking part, the telescopic part and the plugging locking part, the bending angle of the pipe is adjusted, the bending angle of the pipe is simulated through cooperation with the water injection detection mechanism, and different bending angles are adjusted. Therefore, the hydrostatic strength detection of the pipe in the bending state and the hydrostatic strength detection of the pipe in different bending states are realized, the hydrostatic strength of the pipe is comprehensively evaluated, the strength detection of the pipe is more comprehensive, accurate and reliable, and the problem that the detection is qualified in the linear state but fails in actual bending use is avoided.

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 relates to the technical field of material detection, in particular to a solid wood furniture material detection method and system.The method comprises the following steps that form data of a furniture bearing component under the shearing-bending loading condition is obtained, wood connection node imaging is collected, crack displacement is calculated according to a loading sequence, and a fiber bonding point load value is extracted; and calculating the furniture crack growth rate. According to the method, form data is collected through shear-bending loading, crack displacement and fiber bonding point load calculation is achieved, the crack propagation rate is more accurate, the pixel displacement gradient and the maximum shear stress gradient area are combined, the stress concentration point recognition precision is improved, the crack path is tracked based on the local shear stress gradient, and the interlayer energy consumption rate is calculated. Extracting a critical state, identifying a crack instability point, improving damage evolution prediction precision, and improving bending resistance and shearing resistance evaluation comprehensiveness and quality detection reliability in combination with multi-layer stress change and gradient calculation.

The invention belongs to the technical field of impact fatigue performance detection, and particularly relates to a Hopkinson rod three-point bending sample-based constant-amplitude impact fatigue device, which comprises a dynamic indentation system, an energy absorption system, a strain measurement system and a pressure data acquisition system, and is characterized in that the dynamic indentation system comprises kinetic energy application equipment, an impact rod, an incident rod and a three-point bending test bed; the strain measurement system comprises a strain gauge and a dynamic strain acquisition instrument which are electrically connected, the pressure data acquisition system comprises a force transducer and a data acquisition instrument which are electrically connected, and the energy absorption system comprises a flange, a sleeve and a mass block. The device depends on the Hopkinson rod technology, the momentum well design is ingeniously fused, the problem of secondary loading is effectively avoided, constant-amplitude impact fatigue loading is achieved, key parameters such as the yield point, the elastic limit and the breaking strength of the material are accurately measured, and the reliability and safety of the material are comprehensively evaluated.

The invention provides a U-shaped sample preparation device, and belongs to the technical field of stress corrosion testing, the U-shaped sample preparation device comprises a support seat, a base station and a pressure applying assembly. The base table is fixed on the supporting seat, the base table is provided with an embedding groove, a U-shaped groove and rotating shafts, the U-shaped groove is communicated with the embedding groove, the depth of the U-shaped groove is larger than that of the embedding groove, the extending direction of the embedding groove is perpendicular to that of the U-shaped groove, the rotating shafts are rotationally arranged in the base table, the rotating shafts are located on the two sides of the U-shaped groove, the rotating shafts and the U-shaped groove extend in the same direction, and the rotating shafts penetrate through the junction of the embedding groove and the U-shaped groove; the pressure applying assembly comprises a transmission mechanism and a pressure head, the transmission mechanism is fixed to the supporting base, the pressure head is connected to the transmission mechanism, and the transmission mechanism drives the pressure head to move in the height direction. According to the preparation device disclosed by the invention, two arms of the U-shaped sample formed by pressing and bending can be kept parallel and centered, the surface of the sample is not damaged, and related experimental standard requirements of the U-shaped sample in a stress corrosion experiment are met.

The invention relates to the technical field of basalt fiber concrete, in particular to a durability analysis method of basalt fiber concrete under response of multiple natural factors, which improves the service life and stability of a concrete structure by comprehensively evaluating the influence of environmental factors such as temperature, humidity, chemical erosion and freeze-thaw cycle on the durability of concrete. The method comprises the following steps: firstly, determining an analysis target and an environmental condition, designing a concrete mix proportion index (CI) considering a basalt fiber mixing amount, a water-binder ratio, an aggregate ratio and an additive ratio, further preparing a concrete test piece, establishing a concrete test piece preparation quality index (QI), evaluating mechanical properties and durability, and constructing a performance evaluation index (API). The invention provides a systematic and scientific analysis tool for durability evaluation and life prediction of basalt fiber concrete, and has important engineering application value and market popularization prospect.

The invention relates to the technical field of connection structure testing, in particular to a bridge deck slab dry joint connection structure testing method which comprises the following steps: preparing a bridge deck slab test piece containing a steel structure embedded dry joint; building a testing device, and arranging strain, displacement and pressure sensors in a dry joint area; carrying out a graded loading test, including static loading to 1.5 times of the designed bearing capacity and dynamic cyclic loading; an environment simulation test is carried out, and repeated loading is carried out in a temperature and humidity circulation box simulation environment; data are evaluated through a multi-source data fusion optimization algorithm model, and indexes such as flexural rigidity and shear rigidity are calculated; in addition, a construction stage simulation test is added, and the alignment deviation and the filling compactness of the components are monitored. According to the method, the structural performance can be comprehensively evaluated, key indexes can be accurately evaluated, durability degradation can be scientifically predicted, construction simulation is innovated, test conditions are guaranteed to be consistent, visualization and verification are achieved, and the problem of limitation of a traditional test method is effectively solved.

The invention discloses a glass limit cold bending electric loading device and a loading test method, and relates to the technical field of glass cold bending test.The glass limit cold bending electric loading device comprises a welding seat body and an extension loading device, a nut lifting type lifter is arranged in the lower end of the welding seat body, the front side of the nut lifting type lifter is connected with a supporting plate, and the left and right positions of the rear end of the supporting plate are connected with linear rails; a lead screw motor is arranged at the top of the welding seat body and connected with a lead screw, a pressure sensor is arranged at the bottom of the lead screw, the lower end of the pressure sensor is in threaded butt joint with a spherical hinge, and the bottom of the spherical hinge is connected with a loading pressure head; the extension loading device is introduced and matched with the loading pressure head to form a multi-loading-point structure, so that the cold bending loading test is more stable, and meanwhile, the position of an auxiliary loading point and the size of the auxiliary loading point can be flexibly adjusted through the combination of the adjusting assembly and the extension assembly, so that the cold bending loading test of the glass plate is more efficient and more stable.

The invention discloses a method for testing interlayer tensile strength of a ceramic matrix composite material. Comprising the following steps: acquiring the geometric dimension of a sample, performing surface treatment on a test surface of the sample, marking a test section of the sample, acquiring the geometric dimension of a four-point bending clamp, determining a placement mode of the sample and a camera, and capturing a displacement field of the test surface of the sample by using the camera while performing a curved beam four-point bending test. Obtaining the load value and stroke of the first load drop, extracting the in-situ strain of the sample by using a camera, deducing a formula for calculating the interlayer radial and tangential modulus ratio of the sample, carrying out calculation, and calculating the interlayer tensile strength of the sample by using the existing formula. According to the method disclosed by the invention, the modulus ratio of the interlayer radial direction to the interlayer tangential direction is obtained by using in-situ strain, the problem that the interlayer radial modulus is difficult to accurately determine directly through the test is solved, and the accuracy of the interlayer tensile strength of the ceramic matrix composite material measured through the curved beam four-point bending test is improved.