86 results about "Compression test" patented technology

The invention is suitable for the technical field of nuclear power, and provides a containment pressure test control method and device and electronic equipment, and the method comprises the steps: receiving a test instruction for carrying out a pressure test on a containment; and if the test instruction is an instruction for performing pressure relief treatment on the containment vessel, controlling a corresponding regulating valve according to a predetermined opening degree of the regulating valve of a nuclear auxiliary plant ventilation system DVN so as to guide gas of the containment vessel to enter the DVN system through a containment vessel ventilation system EBA to be discharged. By means of the method, the duration needed by the pressing test can be shortened, and the operation efficiency of the unit is improved.

1. Name of this design product: Photovoltaic foundation pile compression test bracket. 2. Purpose of this design: For compressive strength testing of photovoltaic foundation piles. 3. The key design elements of this product are its shape, pattern, and their combination. 4. The image or photograph that best illustrates the design's key points: 3D view 1.

The invention discloses a macro-micro feature coupled rock triaxial statistical damage constitutive model construction method. The method comprises the following steps: S1, preparing a triaxial test rock sample; s2, carrying out a compression test to obtain a stress-strain relationship and an acoustic emission ringing count so as to obtain a test curve; s3, calculating a damage proportionality coefficient; s4, a damage variable is calculated, and a preliminary damage constitutive model is obtained; s5, according to the test curve, the preliminary damage constitutive model and counting, obtaining a correction coefficient and correcting the correction coefficient to obtain a corrected constitutive model; s6, solving and correcting constitutive model parameters; s7, constructing a constitutive model effect evaluation index; and S8, obtaining a constitutive model according to the parameters, and performing precision verification on the constitutive model according to the evaluation indexes. According to the macroscopic and microcosmic feature coupled rock triaxial statistical damage constitutive model construction method, the problem that the whole rock damage evolution process is difficult to accurately reflect due to the fact that an existing model is insufficient in description of post-peak stress drop and pre-peak softening compaction features of rock is solved.

The utility model discloses an assembly type hydraulic characteristic test bench, which comprises an experiment box, an experiment pedestal and an electric lifting mechanism, the inner top of the experiment pedestal is provided with a plurality of groups of placing clamping grooves, the inner bottoms of the plurality of groups of placing clamping grooves are in sliding clamping connection with support top plates, the bottom ends of the support top plates are symmetrically connected with extrusion push rods, and the extrusion push rods are in sliding clamping connection with the support top plates. The outer side of the extrusion push rod is sleeved with a spring, the bottom extending end of the extrusion push rod is connected with a sensing sliding block, a pressure sensing detection table is installed at the inner bottom of the experiment table base, a plurality of sets of sensing empty grooves are evenly formed in the pressure sensing detection table, and a hydraulic guide pressure box is arranged in the experiment box; the beneficial effects of the utility model are that through the integrated extrusion impact compression resistance test and the integrated multi-group compression liquid injection hydraulic test structure, the detection cost is reduced, the detection diversity is improved, the manual operation is reduced, and the use convenience and the test efficiency are improved.

The application discloses a method for predicting mechanical properties of a nickel-titanium alloy part based on deep learning, and comprises the following steps: determining initial characteristics of the nickel-titanium alloy required by a mechanical experiment; manufacturing two different nickel-titanium alloy parts, respectively performing tensile and compression tests on the samples, collecting corresponding data, and forming an initial data set by combining all the collected data with printing parameter data; pre-processing the initial data, dividing the initial data into a training set and a test set according to a proportion, using printing parameters of additive manufacturing as input values of a deep learning model, using performance parameters of the mechanical experiment in the data set as output values of the deep learning model, constructing a mechanical property prediction model of the nickel-titanium alloy, training the mechanical property prediction model by using the training set data, and testing the mechanical property prediction model by using the test set data after the training is completed; and the application can predict the mechanical properties of the nickel-titanium alloy with high accuracy and improve the research efficiency of the nickel-titanium alloy.

This invention discloses a method for fabricating and loading compression specimens of staged construction steel-concrete composite columns, belonging to the field of civil engineering technology. It includes a steel-concrete composite column, a reinforcing cage, steel strands, anchorages, and steel plates. The steel-concrete composite column comprises an outer concrete layer and a steel-concrete core, with the steel tube and core concrete core being of different cross-sectional shapes (circular or square). This invention applies the initial load to the staged construction steel-concrete composite column before the outer concrete is poured by pre-tensioning the steel strands, effectively realizing the true stress state of the staged construction composite column. It allows for the simple testing of the compressive bearing capacity of staged construction steel-concrete composite columns without requiring long-term use of testing equipment.

This invention discloses a Hopkinson bar tension / compression system based on electromagnetic coil acceleration. The system includes an electromagnetic coil winding, an armature, and a Hopkinson bar. The armature is sleeved outside the incident rod of the Hopkinson bar. The electromagnetic coil winding is disposed outside the armature. When the electromagnetic coil winding is energized, it drives the armature to impact the end of the incident rod furthest from the test sample to perform a Hopkinson bar tension test, or drives the armature to impact the end of the incident rod closest to the test sample to perform a Hopkinson bar compression test. This invention uses an electromagnetic coil winding to drive the armature to accelerate and impact the incident rod, thereby loading a stress wave. Compared to the method of compressed gas, the impact speed at the armature outlet is faster, and the speed of the incident rod can be precisely controlled simply by controlling the magnitude of the current within the electromagnetic coil winding.

The invention relates to the technical field of civil engineering detection, and discloses a dry density-based fine-grained soil compression modulus rapid determination method, which comprises the following steps: carrying out sample preparation and standardization on target fine-grained soil according to fixed dry soil mass and a unified initial height value; executing a limit compression test on the sample, and collecting a load-displacement data sequence until the curve slope is sharply increased and is close to be vertical; processing the load-displacement data sequence, and constructing a dry density-compression modulus reference relation model of the target fine-grained soil; measuring the on-site dry density of the on-site to-be-measured compacted soil body which is the same as the target fine-grained soil; and substituting the field dry density into the reference relation model, and calculating and determining the field compression modulus. According to the method, the dry density-compression modulus reference model of the soil is provided through a one-way extreme compaction experiment and digital model construction, and rapid and accurate measurement of the compression modulus is realized.

The application belongs to the technical field of concrete strength detection, and relates to a micro core sample method strength conversion method and system for UHPC. The method comprises the following steps: preparing a plurality of different micro core sample samples and pouring a plurality of standard test piece samples matched with the micro core sample samples; performing a compression test on all the micro core sample samples and the standard test piece samples to calculate a measured conversion coefficient; constructing a mathematical model of a predicted conversion coefficient, determining a parameter to be calibrated and a value range of the parameter, constructing an objective function, performing parameter inversion by using a differential evolution algorithm and a limited memory quasi-Newton method, determining a calibrated value of the parameter, and updating the mathematical model of the predicted conversion coefficient; taking a micro core sample from a concrete entity structure on site, performing a compression test on the micro core sample, calculating the predicted conversion coefficient, and then calculating a standard test piece compression strength. The application can accurately establish a conversion relationship between the micro core sample compression strength and the standard test piece compression strength, and improve the strength detection precision of the UHPC entity structure.

The embodiment of the invention provides a construction quality detection method, system and device for solidified soil, and relates to the technical field of building construction detection. The construction quality detection method for the solidified soil comprises the following steps: after construction of to-be-detected solidified soil is completed, immediately obtaining resistivity data of the to-be-detected solidified soil; determining sampling position depth information according to the probe cable length data; collecting the solidified soil to be detected according to the sampling position information; carrying out a compression test on the solidified soil at the age of 1 day to obtain uniaxial compression strength data at the age of 1 day; and evaluating the construction quality of the to-be-detected solidified soil according to the resistivity data and the uniaxial compression strength data of the one-day age, and obtaining a quality detection result. According to the construction quality detection method for the solidified soil, the technical effect of improving the quality detection efficiency of the solidified soil can be achieved.

The present application relates to the technical field of clamp loading and unloading, and particularly relates to an automatic loading and unloading system and method of a hole compression test clamp. In the system, a positioning mechanism, a discharging mechanism, a gripper and a mechanical arm are included, the mechanical arm is used to drive the gripper to clamp the hole compression test clamp with a test piece; the hole compression test clamp includes two long clamping plates, two short clamping plates and two support plates, one long clamping plate, one short clamping plate and one support plate are fixed to each other through fasteners, the other long clamping plate, the other short clamping plate and the other support plate are fixed to each other through fasteners, and the two long clamping plates and the two short clamping plates are used to clamp the test piece made of fiber composite material; the positioning mechanism is used to position the hole compression test clamp by abutting against the side surfaces of the long clamping plates and the short clamping plates; and the discharging mechanism is used to dismount the test piece from between the two long clamping plates and between the two short clamping plates. The scheme can improve the loading and unloading efficiency of the hole compression test clamp.

The utility model relates to the technical field of concrete detection equipment, and particularly discloses a concrete compression test device which comprises a base, stand columns, an upper beam, a lead screw, an oil cylinder, a control box, a surrounding baffle and a cover plate, a plurality of stand columns are longitudinally fixed to the top of the base, the tops of the stand columns are fixedly connected with the upper beam, and the upper beam is fixedly connected with the lead screw. A threaded seat is longitudinally fixed in the upper beam, the lead screw is in threaded connection in the threaded seat, an upper pressing plate is fixedly connected to the bottom of the lead screw, a cylinder body of the oil cylinder is longitudinally fixed on the base, a lower pressing plate is fixedly connected to a piston rod of the oil cylinder, and the oil cylinder is electrically connected with the control box. The enclosure plate is arranged on the lower pressing plate in a lap joint mode, the opening side of the enclosure plate faces forwards, a cover plate is movably installed at the front end of the enclosure plate, and concrete fragments can be effectively prevented from splashing, and the difficulty of cleaning the fragments is reduced.

The Y-shaped sealing test tool comprises a Y-shaped pipe, a pressure gauge control valve and a pressure reduction gauge control valve are installed on two pipes on the upper portion of the Y-shaped pipe respectively, and a pressure gauge and a pressure reduction gauge are correspondingly installed at the ends of the Y-shaped pipe; a pipe opening mask is arranged at the end of a lower pipe of the Y-shaped pipe in a penetrating mode and used for being connected with a vent pipe flange. The tool is easy to manufacture and high in practicability, the universality of the tool can be enhanced through the detachable design, and the safety and reliability of the tool are guaranteed through the pressure reduction safety device.

The invention provides a concrete compression test behavior monitoring method, a memory and a monitoring system. The concrete compression test behavior monitoring method comprises the following steps: acquiring a multi-source original signal in real time so as to judge whether a pressure relief behavior occurs or not based on the multi-source original signal; when the pressure relief behavior occurs, key features are extracted, and the key features at least comprise key time points and corner cut features; and obtaining a primary monitoring result based on the key time point, and obtaining a secondary monitoring result based on the corner cut characteristics, so as to obtain a compliance monitoring result of the concrete compression test behavior in combination with the primary monitoring result and the secondary monitoring result. According to the invention, accurate, automatic and real-time identification of man-made illegal pressure relief behaviors in the concrete compression test from'action intention 'to'data expression' is realized, and the technical problem that the prior art cannot cope with hidden and simulated data fraud behaviors is fundamentally solved.

The utility model discloses a compression test device for composite material thin-walled structure sample piece, including: clamps, anti-instability baffle and compression loading structure, the clamps are divided into two groups, are arranged at interval and are used for clamping the two side edges of the sample piece, each group of clamps comprises two support frames and two clamping plates, the two clamping plates in each group of clamps are respectively connected to the opposite sides of the two supporting frames in the group of clamps, and the opposite end surfaces of the two clamping plates in each group of clamps and the front and rear end surfaces of the corresponding side edges of the sample piece are designed in a shape following manner; the anti-instability baffles are correspondingly attached to the front portion and the rear portion of the sample piece, the two ends of each anti-instability baffle are connected with the two clamps respectively, and the compression loading structure is located over the position between the two clamps and used for applying compression loads to the sample piece. According to the compression test device, effective clamping of the sample piece can be guaranteed, instability and deformation of the sample piece in the compression process can be prevented, and the precision and reliability of a compression test are guaranteed.

The invention discloses an RCS (radar cross section) single-double station composite testing device and method based on multi-probe spherical distribution, and belongs to the technical field of radar cross section testing. According to the invention, through a sampling strategy of multi-probe array electronic scanning, the single-station and double-station RCS test efficiency is greatly improved, and the effect is more obvious when the method is applied to the double-station wide-angle-domain RCS test of a coupling scattering target; the scale of a test scene is compressed through a spatial multiplexing mechanism, and a single-station / double-station composite test function is integrated while the compactness of the system is improved; the channel self-calibration method for the multi-probe RCS test is provided for the first time, channel calibration steps are synchronously integrated into the test process, channel amplitude and phase errors are calibrated in real time through measured data, and the test complexity is remarkably simplified. Through an innovative sampling strategy, a flexible architecture design and an efficient test method, a solid technical support is provided for rapid test of the target stealth performance.

This invention relates to a data processing method and storage medium for ice-elastic plate compression tests in the field of ship structural mechanics. The method includes the following steps: performing a compression test by compressing an ice sample with an elastic plate; after the compression test, obtaining the test pressure value and strain gauge test values ​​of the ice sample under compression; selecting a preset order mode shape using the modal superposition method to obtain a fitted deflection function; determining the fitted strain value corresponding to each test point of the elastic plate based on the fitted deflection function; calculating the time coefficient by combining the strain gauge test values ​​and the fitted strain values ​​using the least squares method to obtain the fitted deflection distribution function of the elastic plate; and calculating the compression energy of the elastic plate and the ice sample based on the fitted deflection distribution function and the test pressure value. This method focuses on the deformation of the elastic plate to explore the interaction between ice and the structure from an energy perspective, considering the feedback influence of structural deformation on the action process, thus forming a universal method for predicting ice loads.

The invention discloses a compression resistance detection device for a new material plastic product, and relates to the technical field of new material detection, the compression resistance detection device comprises a bottom plate, a support and a control panel, the support is fixed on the upper end face of the bottom plate, the control panel is fixed on the right side of the support, and a positioning mechanism is fixed on the upper end face of the bottom plate and used for supporting and positioning a plastic pipe. And an adjusting mechanism is mounted on the bracket. According to the compression resistance detection device for the new material plastic product, through the linked pre-detection mechanism, before a formal compression resistance test, gas is injected into a sealed pipe fitting, and the air pressure change is monitored, so that an unqualified sample with a microscopic crack can be effectively identified, and the subsequent detection is terminated; according to the mechanism, test data distortion caused by inherent defects of the sample is avoided from the source, it is ensured that the subsequent compression resistance test result truly reflects the performance of the material, meanwhile, the test time on invalid samples is saved, and the overall detection efficiency is greatly improved.

A water-permeable pad for pets according to one aspect is arranged on an absorbent sheet. The water-permeable pad has a porous structure, and in a dry state, a compression work (WC value) obtained by a KES compression test is 13 gf-cm / cm 2 or more and 60 gf-cm / cm 2 or more and 60 gf-cm / cm

The invention belongs to the field of crustal stress measurement, and provides a crustal stress measurement method based on a nonlinear mechanical theory, which comprises the following steps: firstly, measuring a stress-strain curve of a strain hardening material to obtain mechanical parameters, and then constructing a measurement platform comprising a concrete cube, an elastic-plastic thick-wall cylinder and a precise range finder; the thick-wall cylinder is embedded into a concrete through hole and is internally provided with a precise range finder to monitor the change of the inner diameter. A compression test is carried out through multiple groups of horizontal pressure stresses, numerical simulation is combined, and a nonlinear model about the horizontal pressure and mechanical parameters and geometric parameters of the thick-wall cylinder is constructed by applying a Bayesian neural network and a data augmentation technology. The method comprises the following steps: placing a crustal stress observation instrument in an underground soft rock area or a fracture zone deep hole, continuously monitoring the change of the inner diameter of a thick-wall cylinder after coupling with concrete, and determining maximum and minimum principal stress and directions according to a nonlinear model; by means of the method, scientific and technical support can be provided for deep ground scientific exploration and underground engineering construction.

The invention discloses a method for synchronously characterizing mechanical properties and microscopic deformation of an explosive at a high temperature, which is suitable for synchronously characterizing mechanical properties and microscopic deformation of explosive granular mixtures, grains and other energetic material crystals or granular materials. The test process comprises the steps of sample preparation, sample installation, connection of a fatigue testing machine and a scanning electron microscope, parameter adjustment of the scanning electron microscope and the fatigue testing machine, temperature rise, temperature-mechanical-electron microscope synchronous test and the like. And a set of special compression test tool is designed, so that real-time dynamic characterization of mechanical properties and microstructure deformation under a high-temperature condition is realized. According to the method, the deformation characteristics of the explosive in the pressing process can be dynamically monitored in real time, the test process is observable, the test conditions are more scientific and reasonable, the microscopic morphology monitoring of the explosive in the deformation process is realized, the characterization accuracy is improved, and meanwhile, the method is simple to operate and has low requirements on experimenters.

This invention provides a method for manufacturing VDMOS. The method acquires an initial image of the VDMOS under test, determines the device model and pin count of the VDMOS based on the initial image, and obtains preset detection points and corresponding preset pressures on each pin according to the device model. Based on the preset detection points and preset pressures, the pressure heads in the upper and lower test groups are controlled to perform upper and lower compression tests on the pins of the VDMOS under test, obtaining a first detection result. Then, the pressure heads in the left and right test groups are called to perform left and right compression tests on the pins corresponding to the first detection result, obtaining a second detection result. This invention automatically matches test parameters by identifying the device model, and utilizes physical compression in the upper and lower and left and right directions combined with image analysis to detect the state of the pins under stress, thereby identifying pin defects and achieving the detection of the physical quality of the manufactured VDMOS.

The utility model relates to the technical field of compression-resistant test molds, and discloses a concrete compression-resistant test mold which comprises a test mold shell, and a demolding assembly is arranged in the test mold shell. The test mold box is slidably placed in the test mold shell, then the sealing block is attached to the bottom of the test mold box through the thrust of the limiting spring in the limiting box, meanwhile, the sealing block drives the guide limiting block to move upwards along the limiting sliding groove, and then concrete is poured into the test mold box; when the concrete in the test mold box needs to be demolded, a hydraulic rod is operated, the hydraulic rod pushes a piston rod towards the test mold box, and then the piston rod downwards pushes a pressurizing panel, so that the pressurizing panel extrudes the concrete in the test mold box towards a limiting box; thus, concrete in the test mold box downwards extrudes a sealing block, the sealing block downwards extrudes a limiting spring, and the sealing block downwards drives a guide limiting block to slide along a limiting sliding groove.

The application discloses a kind of based on three-dimensional complex stress state asphalt mixture tension-compression mechanical parameter measurement method, comprising the following steps: preparation asphalt mixture cuboid test piece and after keeping temperature specified time length in constant temperature environment, put into the test fixture of true triaxial test system and carry out tensile test test and compression test test, strain combination corresponding to different stress combinations under each three-dimensional stress state is obtained by summarizing test results;According to the basic assumption of three-dimensional bimodulus constitutive model calculation formula under the principal stress discrimination rule and bimodulus theory, the mechanical parameter calculation relationship formula of asphalt mixture under each three-dimensional stress state is established, the data of stress combination and corresponding strain combination under each three-dimensional stress state are substituted into corresponding asphalt mixture mechanical parameter calculation relationship formula and then solved, corresponding mechanical parameter is obtained.The application can more accurately obtain the tension-compression mechanical parameter characteristics of asphalt mixture in actual service process.

The invention relates to an alloy high-flux mechanical testing method, and belongs to the technical field of alloy production. The method comprises the following steps that a single alloy bar is placed in vacuum directional solidification equipment to be subjected to gradient heat treatment, so that the single alloy bar has a heat treatment process which continuously changes in the axis direction; processing a plurality of hundred-micron micro-columns in parallel on a single alloy bar subjected to gradient heat treatment to form a micro-column array; and performing a compression test on the micro-column array by using a mechanical test platform to obtain mechanical data of different micro-columns. The core of the method is that a macroscopic scale continuous gradient sample library is converted into hundreds of independent test units with macroscopic mechanical representativeness through a parallel micro-nano manufacturing technology, and rapid and accurate performance screening and mapping are realized by using an autonomously built test platform.

The application relates to the technical field of battery materials, in particular to a paste charging material compression test device and a test method thereof, which comprises a testing machine support, a sample box mounted on the testing machine support, a compression test box and a protective gas source box, the inside of the sample box is provided with a temperature control room, and the inside of each layer of the separated rooms is provided with an automatic feeding mechanism and a heating plate. The application prevents the external environment from affecting the test results through the settings of the sample box, the temperature control room, the lifting chamber and the compression test box, reduces the influence of the temperature accuracy reduction caused by manual operation through the settings of the multiple separated rooms in the temperature control room, realizes rapid testing of multiple samples, and also facilitates the control test, so that the device has high universality, the settings of the automatic feeding mechanism, the vertical lifting support, the first electric push rod and the second electric push rod do not need manual feeding and discharging, reduce manual intervention and external influence, and further improve the accuracy of the test.

This invention provides a high-temperature compression test fixture device for composite materials suitable for DIC strain testing, belonging to the field of composite material mechanical property testing technology. The device includes a front clamping block assembly and a rear clamping block assembly, each comprising an upper clamping block and a lower clamping block, connected by a guide rod. Each upper and lower clamping block includes a main body for clamping the side of the test specimen and a lateral extension extending from one side of the main body, such that both the upper and lower clamping blocks have an L-shaped cross-section. The main bodies of the front and rear clamping block assemblies are connected by fasteners to clamp and fix the test specimen. The guide rod is disposed on the lateral extension to ensure that it does not obstruct the working area surface of the test specimen. This invention enables accurate measurement of the full-field high-temperature compressive strain of composite materials through a DIC strain testing system.

The utility model discloses a compression test device for corrugated carton production, which relates to the technical field of corrugated paper and comprises a device main body, an adjusting screw rod, a threaded block, a reset block, a central opening, a protective layer, a laser range finder, a carton main body and a top plate, an electric push rod is connected below the top plate, and a bottom plate is connected below the electric push rod. A rubber block is further arranged below the carton body, a reset spring is connected to the lower portion of the rubber block, an adsorption opening is connected to the center of the rubber block, and an adsorption mechanism is connected to the lower portion of the adsorption opening. The center of the device main body is provided with the rubber block and the adsorption mechanism, so that the rubber block is adsorbed at the bottom of the carton main body, the carton main body is fixed by utilizing negative pressure, and inaccurate test results caused by supporting the carton main body during a compression test are avoided; and the rubber blocks are attached to the carton body, and stable fixing is guaranteed.

This utility model relates to the field of automotive engineering, and more particularly to a shock absorber performance testing device. This utility model provides a shock absorber performance testing device capable of simulating different temperatures and adjusting different pressures to perform compression tests on shock absorbers, facilitating a comprehensive evaluation of the shock absorber's performance, reliability, and durability, and improving test reliability. A shock absorber performance testing device includes a base, a rotating door, and an isolation cover. The rotating door is rotatably connected to the left front side of the base, and the isolation cover is connected to the upper side of the base. This utility model uses an adjusting plate to move, causing a telescopic frame to extend and retract, then fixing and adjusting the pressure before installing the shock absorber. The shock absorber is then tested by moving a first sliding frame up and down to compress it. The temperature is adjusted by introducing a cold or hot medium into a circulating pipe, thereby simulating different temperatures and adjusting different pressures to perform compression tests on the shock absorber, facilitating a comprehensive evaluation of the shock absorber's performance, reliability, and durability, and improving test reliability.

The utility model discloses a jar pulling and pressing test rack, and relates to the technical field of petroleum drilling tool testing tools, the jar pulling and pressing test rack comprises a plurality of clamping shafts arranged in a V shape and a push-pull assembly coaxially arranged at one end of each clamping shaft, the clamping shafts are connected into a whole through a first support, and each clamping shaft is provided with a plurality of annular clamping grooves at equal intervals in the axial direction; the output end of the push-pull assembly is connected with a first connector, the first connector is connected to one end of the jar in a clamped mode, the pressing connection block is vertically connected to the annular clamping grooves in the same positions of the clamping shafts in a clamped mode, and the second connector is connected with the other end of the jar. A plurality of annular clamping grooves are formed in the clamping shaft at equal intervals in the axial direction, so that adaptive tension and compression experiments of different specifications of jar knockers are realized; by arranging the pull rope and the packaging assemblies, the packaging assemblies on the two sides are triggered by means of the action of the clamping plate piece on the pull rope, and top sealing of the jar in the V-shaped structure of the clamping shaft is achieved.