239 results about "Compression test" patented technology

The invention provides a rock damage evaluation method and device, and the method comprises the following steps: carrying out a compression test on a rock sample until the rock sample is damaged; treating the damaged rock sample to obtain a multi-scale damage fractal dimension of the damaged rock sample; based on the multi-scale damage fractal dimension, calculating a weight coefficient of each scale fractal dimension to the damage of the rock sample through an analytic hierarchy process; constructing a multi-scale rock damage evolution fractal model based on the weight coefficient; and evaluating the damage degree of the rock to be measured based on the rock damage evolution fractal model. The defect that the rock damage degree is determined from a single scale is overcome, rock damage can be more comprehensively and accurately quantified, long-term rock damage and stability evolution are effectively predicted, and reference is provided for comprehensively and accurately representing the rock damage degree and long-term evolution.

The invention discloses a highway bridge expansion joint compression test device, and belongs to the field of expansion joint test devices.The highway bridge expansion joint compression test device comprises a test bed, two sliding rails are symmetrically fixed to the top of the test bed, two limiting mechanisms symmetrically slide on the sliding rails, and an L-shaped supporting seat is fixed to the middle of the back face of the test bed; a hydraulic cylinder is installed in the middle of the top of the L-shaped supporting seat, the output end of the hydraulic cylinder extends to the position over the test bed and is fixedly provided with a pressure testing mechanism, the pressure testing mechanism comprises a fixing plate, the fixing plate is fixedly connected with the output end of the hydraulic cylinder, and three sets of hollow-square-shaped pressing frames are fixed to the bottom face of the fixing plate at equal intervals; the connecting plates are arranged between the two adjacent hollow-square-shaped pressing frames; the fixed frame is fixedly connected to one end of the bottom of the connecting plate. According to the invention, under the stable pressure, the condition that the vehicle performs rolling test on the expansion joint under different conditions is simulated, so that the accuracy of testing the compression resistance of the expansion joint is improved.

The invention discloses a composite material compression test fixture capable of synchronously applying pressure. The composite material compression test fixture comprises a bottom frame and a clamping block, the bottom frame comprises a bottom plate capable of being installed on a test board, a back plate connected with the bottom plate and side plates on the two sides. The two pairs of clamping blocks are symmetrically arranged up and down, and each pair of clamping blocks are symmetrically arranged left and right; the upper clamping block and the lower clamping block on one side are installed on the same movable plate in a sliding mode through a first vertical guide structure, the side portion of the movable plate is installed on the back plate in a sliding mode through a transverse guide structure, and a clamping power piece is installed on the side, away from the clamping blocks, of the movable plate and faces the side plate on one side. The clamping power pieces are used for abutting against the side plates and pushing the clamping blocks on the sides to conduct clamping. The upper clamping block and the lower clamping block on the other side are installed on the same fixing plate in a sliding mode through a second vertical guide structure, and the fixing plate is installed on the other side plate. One end, close to the effective test area, of the clamping block is provided with an extension part and an arc-shaped chamfer. The clamp can effectively relieve stress concentration of the ends of the clamping blocks in an effective test area of a sample, and loads of the left clamping block and the right clamping block are evenly distributed.

The invention relates to the technical field of composite material mechanical property detection, in particular to a composite material plate compression test clamping device, which comprises a fixed seat, and a clamping mechanism, a power device and a loading assembly which are arranged on the fixed seat, the clamping mechanism comprises a first clamping assembly and a second clamping assembly which are oppositely arranged, the first clamping assembly is driven by a power device to move towards the second clamping assembly, the sample plate is clamped and fixed from the two sides of the sample plate, and the stability of uniform clamping of the sample plate is ensured. The first movable clamping plate and the second movable clamping plate are connected with the loading assembly and are driven by the loading assembly to move towards the first fixed clamping plate and the second fixed clamping plate respectively. A clamped and fixed sample plate is vertically loaded by independently controlling a loading assembly, the loading assembly comprises a downward pressing seat and a loading rod arranged on the downward pressing seat, a ball head part of the loading rod is rotationally connected with the downward pressing seat, a ball joint can compensate the installation angle deviation of the sample, and it is ensured that a compression load acts on the center of the sample plate in the vertical direction all the time.

The invention discloses a concrete quality detection device, and relates to the technical field of concrete detection, the concrete quality detection device comprises a detection table and a fixing cylinder, the fixing cylinder is installed at the center position of the detection table in a penetrating manner, a supporting seat is installed at the position, located on the rear side of the fixing cylinder, of the detection table, and a hydraulic cylinder is installed at the top of the supporting seat; the movable end of the hydraulic cylinder is connected with a pressing plate, and an auxiliary mechanism is arranged in the fixed cylinder and used for transferring a concrete block sample and cleaning the crushed concrete block sample. And the orientation of the concrete block sample is adjusted, so that the polished flat surface is in contact with the pressing surface of the pressing plate and the bearing surface of the bearing plate, uniform pressure application to the concrete block sample during compression resistance detection is ensured, and the situation that detection data are wrong due to the fact that pressure intensively acts on convex points of the concrete block sample is avoided.

The invention discloses a partition dot matrix filling air rudder lightweight design method. The method mainly comprises three parts of establishment of a dot matrix unit cell equivalent mechanical performance proxy model, topological optimization design of an air rudder structure and optimization design of dot matrix filling parameters. Comparing compression tests of different rod diameters with simulation results of variable cross-section beam units with different parameters, and searching optimal beam unit cross-section parameters to construct and calculate a lattice unit cell equivalent mechanical performance agent model; structure topological optimization design is carried out on the determined air rudder appearance and load conditions, dot matrix filling area division is carried out on a design area according to a topological optimization result, and the design area can be divided into areas with different filling densities according to design requirements; and establishing a parameterized finite element model for the dot matrix filling structure and the air rudder model, and performing optimization design on rod diameters of different partitions on the basis to obtain a final dot matrix filling design model.

The invention discloses a novel motor shell material compression resistance test bench, which comprises a base, a bottom plate is fixed on the top of the base, and a radial shrinkage extrusion test mechanism is arranged on the bottom plate and is used for testing the compression resistance of the side surface of the motor shell material; the radial shrinkage and extrusion testing mechanism comprises a disc fixed to the top of the bottom plate. The invention relates to the technical field of material testing equipment. According to the novel compression resistance test bench for the motor shell material, through the arrangement of the radial shrinkage extrusion test mechanism, the motor shell material is radially shrunk and extruded by utilizing four extrusion arc plates, so that the multi-directional pressure test on the side surface of the motor shell material is realized; compared with a traditional pressure testing device which can only conduct pressure testing on the motor shell material in the vertical direction, the testing device does not need to frequently adjust the position of the motor shell material, the testing efficiency is greatly improved, and errors generated by manual operation are also avoided.

The invention discloses a non-intrusive monitoring in-plane and thickness-direction integrated permeability testing device and method for a three-dimensional fabric preform. The device comprises a permeability testing die cavity system, a lifting compaction system, a vacuum generation system, a liquid injection and cleaning system and a signal detection and observation system. The non-intrusive sensing system has no influence on system sealing and permeability test liquid flowing in a three-dimensional fabric preform medium; a sample central point liquid injection mode can avoid a competitive effect caused by contact between permeability test liquid and the mold; accurate regulation and control of a compaction state are realized through a compression test of the three-dimensional fabric preform; the method is suitable for a three-dimensional fabric preform which is small in internal gap and cannot be provided with an intrusive sensor; the integrated measurement of the in-plane and thickness-direction permeability is realized, and a plurality of sets of molds do not need to be designed; and a liquid inlet pipeline and a cleaning pipeline are introduced, so that the test can be repeatedly carried out conveniently.

The invention discloses a compression test method for LCD display screen production, and relates to the field of compression test, the method comprises the following steps: collecting LCD display screen information, building an LCD display screen digital twin model, using a digital twin cloud picture to analyze stress distribution, using a non-linear solver to analyze plastic deformation and interlayer stripping behaviors of a material, and obtaining a compression test result of the LCD display screen; positioning potential failure points according to an analysis result, predicting critical pressure values of the points, then setting mechanical pressure test contents according to simulation data obtained in the previous step, carrying out actual mechanical pressure test by using intelligent mechanical test equipment, and evaluating crack initiation probability according to a test result. The problem that the overall performance and the damage condition of the internal structure of the LCD display screen cannot be accurately evaluated due to the fact that an existing LCD display screen compression resistance testing method lacks comprehensive simulation on various pressure scenes is solved, and the compression resistance of the LCD display screen can be comprehensively and accurately evaluated.

The present invention discloses a method, system, medium and equipment for obtaining simulation parameters of vehicle door sealing strip materials. The method includes the following steps: obtaining measured load and displacement curves of sealing strips in various regions of the vehicle door during compression tests of the sealing strips, and selecting the measured load and displacement curves of the sealing strips to be tested; performing simulation compression analysis on the simulation model and simulation working conditions of the sealing strips in the tested regions, and obtaining multiple groups of load and displacement simulation curves of the sealing strips to be tested; fitting the measured load and displacement curves of the sealing strips to be tested with the multiple groups of load and displacement simulation curves of the sealing strips to be tested, and obtaining target material parameters of the sealing strips; obtaining load and displacement simulation curves of the sealing strips in other regions of the vehicle door, and fitting the measured load and displacement curves of the sealing strips in other regions of the vehicle door with the load and displacement simulation curves of the sealing strips, and obtaining final material parameters of the sealing strips; the method can quickly and effectively obtain material parameters consistent with those of the actual vehicle sealing strips, and improve the simulation accuracy of the vehicle door opening and closing durability.

The invention discloses a test device for measuring the compression strength of a composite material plate, which comprises an upper box body and a lower box body, a guide column is arranged between the upper box body and the lower box body, an upper clamping assembly is arranged at the lower end of the upper box body, a lower clamping assembly is arranged at the upper end of the lower box body, and the upper clamping assembly and the lower clamping assembly have the same structure and opposite installation directions. The upper clamping assembly or the lower clamping assembly comprises two wedge-shaped clamping block units which are oppositely arranged, and the end part of the test piece is clamped between the two wedge-shaped clamping block units. The invention also discloses a test method for measuring the compression strength of the composite material plate. The test device can stably work for a long time in high and low temperature environments, meets the test requirements of a compression test, adopts a split design, is rapid in clamping, can effectively resist bending and torsional deformation, improves the test efficiency and accuracy, keeps reliable clamping all the time in the test process, and is simple in structure and convenient to operate. And the problem of clamping failure caused by thermal expansion and cold contraction is effectively solved.

The invention discloses a solid filling material compression test device, and relates to the technical field of compression tests, the solid filling material compression test device comprises a rack, a box body is arranged on the rack, a pressing block is arranged above the box body, the pressing block and the box body are in compression fit, and control assemblies are arranged on the two sides of the box body. According to the solid filling material compression test device, the box body is knocked back and forth through the first knocking rod, and meanwhile, the side wall of the box body is knocked back and forth through the second knocking rod, so that a solid filling material fed into the box body can be more uniformly distributed at the bottom of the box body; according to the invention, local accumulation or non-uniform distribution of the material caused by factors such as gravity and a falling mode in a throwing process is avoided, a more uniform initial material state is provided for a subsequent compression test, a test result is ensured to more accurately reflect the compression performance of the material under an ideal distribution condition, and material particles can be rearranged and closely contacted through knocking vibration, so that the compression performance of the material is improved. Gaps are reduced, so that the material reaches a denser state before a compression test, and the accuracy and the reliability of test data are improved.

The invention relates to a loading device and method for detecting the vertical compression bearing capacity of a single photovoltaic pile, and belongs to the technical field of foundation pile compression tests. Comprising a jack, a balance beam, connecting mechanisms and a telescopic supporting mechanism, the jack is vertically installed on the top face of a test foundation pile, the balance beam is installed on the top face of the jack, the two opposite ends of the balance beam are connected with the connecting mechanisms, and the connecting mechanisms are used for connecting a counter-force foundation pile with the balance beam; the middle part of the telescopic supporting mechanism sleeves the outer surface of the bottom of the test foundation pile; the telescopic supporting mechanism comprises two telescopic supporting rods and a hoop, the hoop is arranged at the bottom of the test foundation pile in a sleeving mode, connecting rings are arranged on the two opposite sides of the hoop, the two telescopic supporting rods are rotationally connected with the two connecting rings correspondingly, and the other ends of the two telescopic supporting rods are rotationally connected with the outer side walls of the bottoms of the two counter-force foundation piles correspondingly. The foundation pile pressure-resistant loading device solves the problem that when an existing foundation pile pressure-resistant loading device adopts a counter-force pile, the constructed photovoltaic pile is prone to inclination.

The invention relates to a method for establishing a viscoplastic constitutive model of a solder bump considering damage. Comprising the following steps: performing a uniaxial tension and compression test on a solder bump sample to obtain a macroscopic stress-strain curve of the sample; a unit cube finite element model is established, the unit cube finite element model adopts the solder constitutive model constructed in the step (2), loads are set for the model for numerical simulation, and a stress-strain curve calculated by the model is obtained; and fitting the stress-strain curve obtained by simulation in the step (3) with the macroscopic stress-strain curve obtained by the tension and compression test in the step (1) through a test parameter method, and determining parameters of the solder constitutive model, so that the final solder bump viscoplastic constitutive model considering the damage is established. The method can accurately predict the deformation and other mechanical behaviors of the solder under the thermal-force loading condition, and can be widely applied to fatigue life prediction and reliability evaluation of the electronic packaging structure.

The present invention relates to a compression test device for a composite laminate with a large length-thickness ratio, belonging to the technical field of composite material testing. It can achieve that the two-side boundaries are kept in a simply supported constraint throughout the compression test process, and the simply supported condition is not easily changed at the moment of failure. The flatness of the loading plane on the length and width surfaces of the plate specimen is also adjusted through a grid device. The device includes: two groups of side supports are respectively arranged at both ends of the bottom installation component, and the specimen is vertically arranged between the two groups of side supports; two groups of bottom constraint plates, four simply supported constraint plates and two groups of out-of-plane adjustable grids are respectively arranged on both sides of the plate-shaped specimen, and the two groups of bottom constraint plates are respectively arranged at the bottom of the plate-shaped specimen, and the four simply supported constraint plates are respectively arranged in pairs at the left and right ends of the plate-shaped specimen; the bottom constraint plates are connected to the bottom installation component, and the simply supported constraint plates are connected to the corresponding side supports; two groups of end constraint plates are respectively arranged on both sides of the top of the plate-shaped specimen and are fixedly connected to the end loading plates arranged thereon, and the end loading plates are connected to the test loading equipment.

The utility model belongs to the technical field of composite material structure test, and discloses an axial compression test fixture, which comprises a base, two side support pieces, a first clamping assembly and an anti-instability assembly, the two side support pieces are oppositely arranged on the base, a composite material is arranged between the two side support pieces, and the anti-instability assembly comprises two first anti-instability pieces and two second anti-instability pieces. Each first anti-instability piece comprises two separated first abutting parts, the distance between the two first abutting parts is larger than the damage range of the side face of the composite material, the two first anti-instability pieces are arranged on the two sides, in the second direction, of the composite material and close to the impacted side face of the composite material, and the second anti-instability pieces correspond to the first anti-instability pieces in a spaced mode; the first anti-instability piece and the second anti-instability piece are fixed to the two side supporting pieces respectively. The first clamping assembly can clamp the top of the composite material. The axial compression test clamp can be used for clamping a composite material subjected to side impact, and the problem that the accuracy of compression test data obtained after the composite material is subjected to side impact is not high is solved.

The utility model relates to the technical field of compression devices, and provides an anti-offset metal material compression test device which comprises a bottom plate and a support frame, a supporting frame is fixed to the top end of the bottom plate, a compression base is fixed to one side of the supporting frame at the top end of the bottom plate, and clamping structures are evenly arranged at the top end of the compression base. By arranging the clamping structure, in the process of clamping metal materials with different sizes and shapes, different clamping threaded rods are started to enable the clamping blocks to move in the sliding grooves through the convex blocks, and then the multiple sets of clamping blocks are used for clamping and positioning the metal materials; therefore, the purpose that metal materials with different sizes can be conveniently clamped and positioned, so that the metal materials are not prone to deviation in the compression process is achieved.

The invention provides a plate tension-compression buckling-restrained clamping device and a working method, relates to the field of tension-compression tests, and aims to solve the problem that data errors are easy to introduce by adopting a buckling-restrained structure during compression of a plate in a tension-compression cycle test. The elastic piece acts on the lower clamping plate through elastic force, so that the working area continuously restrains the parallel section of the sample, buckling instability of the parallel section in the thickness direction during compression is prevented, it is guaranteed that deformation is in-plane deformation all the time, the sample slides relative to the working area during tension and compression circulation, and sliding friction force can be reduced through the antifriction layer at the contact position of the lower clamping plate. The constraint force transmitted by the elastic piece is measured by the force sensor in real time, and the data can reflect the constraint strength and potential friction influence, so that subsequent correction of compression deformation data is facilitated, and errors are reduced.

The present invention discloses a method for simultaneously characterizing the mechanical properties and microstructure of a single granular body. This method is suitable for simultaneously characterizing the mechanical properties and microstructure of explosive granular bodies and other energetic material crystals or granular materials. The test process includes six steps: sample preparation, sample installation, parameter adjustment of a mechanical-optical microscope combined test system, mechanical-optical real-time monitoring testing, analysis of the granular body's compression performance and optical images, and simultaneous characterization of its mechanical properties and microstructure. A dedicated compression test fixture is designed, and an evaluation basis for the simultaneous characterization of mechanical properties and microstructure is proposed. The present invention monitors the deformation characteristics of a single granular body during compression. The test process is observable, and the test conditions are more scientific and reasonable, improving the accuracy of the characterization. The method is also simple to operate and requires less experimental personnel.

A comprehensive mechanical property test board for a hinged bogie of a trackless carry-scraper relates to the technical field of mechanical property test and comprises an integrated platform which is respectively provided with a tensile compression test assembly and a torsion test assembly; the tension and compression test assembly comprises a supporting rack, a mounting side plate is fixed on the upper surface of the supporting rack, and a tension and compression loading module is telescopically arranged on the mounting side plate; the tension and compression loading module comprises a compression jacking head, and a pressure sensor is arranged on the side end face of the compression jacking head; a stretching chuck is fixed to the peripheral wall, close to the tail end, of the compression jacking head, four stretching clamping jaws are arranged on the stretching chuck in a sliding and telescopic mode, and tension sensors are arranged on the stretching clamping jaws. The test board solves the problems of dispersed test, low efficiency, manual dependence, insufficient precision, unstable platform, poor universality and the like when comprehensive mechanical property test is carried out on the hinged bogie of the trackless carry-scraper in the prior art.

The present invention proposes an assembled axial and eccentric reciprocating tension-compression test device and test method suitable for structural members, which belongs to the field of building structure technology. It solves the problem that existing test devices can only realize monotonic compression or monotonic tension conditions, and cannot realize reciprocating tension-compression test loading. The present invention mainly includes a loading device connection part, a test member connection part and a test member. The present invention effectively avoids the problems of premature damage to the ends of structural members and insufficient transmission of tension-compression loads during reciprocating tension-compression loading, ensures the effective transmission and conversion of tension-compression loads in metal tube-concrete composite members, and adjusts the position of the tension-compression rotating shaft through the eccentricity adjustment shaft. The present invention can apply tension-compression reciprocating loads of arbitrary eccentricity to structural members, adopts assembled mechanical connection, and the test device assembly operation is convenient, which can realize rapid installation and rapid replacement of test members and loading devices, reducing the extra workload during the test process.

The utility model discloses an endurance test device for a dust cover. The endurance test device comprises a rack, a first telescopic device and a second telescopic device, a placing plate is arranged in the middle of the rack, and the first telescopic device and the second telescopic device are mounted above and below the placing plate respectively; the second telescopic device is suitable for upwards penetrating through the placing plate so as to be used for positioning and sleeving the dustproof cover to be tested; and the first telescopic device is suitable for pressing the top of the positioned dust cover downwards and driving the dust cover to be subjected to repeated compression deformation relative to the placing plate through reciprocating motion. The dustproof cover testing device has the beneficial effects that compared with an existing dustproof cover testing device, the dustproof cover testing device can effectively test the dustproof cover in the folding resistance aspect. And a high-strength compression test can be performed on the dust cover through the first telescopic device and the second telescopic device, so that whether the dust cover is folded or not is subjected to a high-strength test.

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.

The utility model relates to the technical field of bridge expansion joint tests, in particular to a bridge expansion joint large-scale test bed device which comprises a base, a test groove, a first hydraulic oil cylinder, a first telescopic column, a push plate, a second hydraulic oil cylinder and a third hydraulic oil cylinder. When the large-scale test bed device for the bridge expansion joint is used, firstly, the bridge expansion joint device is placed in a test tank, a third hydraulic oil cylinder controls a fixing plate to fix the tail part of the device, and then a first hydraulic oil cylinder and a second hydraulic oil cylinder work to carry out an extrusion test on the structural strength of the device; liquid nitrogen is sprayed out through the spray head to cool the test environment and simulate the structural strength of the device at a low temperature, the heating panel is used for heating to heat the test environment, and the structural strength of the device at a high temperature is simulated, so that the test of the device is more comprehensive, and the test accuracy is fully improved.

The present invention relates to a hybrid loading fixture with stable clamping, comprising a fixture body and an auxiliary clamping assembly. The auxiliary clamping assembly is installed in the middle of the fixture body. The fixture body includes an upper fixture and a lower fixture which are symmetrically arranged. The upper fixture and the lower fixture have the same structure. An auxiliary clamping assembly is symmetrically arranged between the upper fixture and the lower fixture. The auxiliary clamping assembly includes a driving part and a clamping part. The output end of the driving part is connected to the clamping part, and the clamping part abuts against the fixture body. On the one hand, the present invention improves the accuracy of the installation position of the spline, keeps the central axis of the spline overlapping with the central axis of the device, effectively overcomes the stress of the spline in the horizontal direction during the test, and improves the detection accuracy. On the other hand, it can provide a larger range of clamping force, can meet the tensile or compression test of a maximum test load of 3000 kN, and can perform tensile and compression tests on materials with different thicknesses and higher performance.

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 invention discloses a gluing tool for a composite material compression sample and a manufacturing method of the gluing tool, and relates to the technical field of composite material manufacturing. The gluing tool for the composite material compression test sample is used for gluing a composite material compression test plate and a reinforcing sheet and comprises a bottom plate, a supporting assembly is arranged on the bottom plate, at least one glue overflowing groove is formed in the bottom plate, and the glue overflowing grooves are located in the periphery of the composite material compression test plate placed on the bottom plate; the pressurizing assembly comprises a pressurizing plate and a pressurizing part, the fixed end of the pressurizing part is connected with the supporting assembly, and the free end of the pressurizing part is connected with the pressurizing plate. According to the gluing tool for the composite material compression test sample, the pressurization assembly pushes the pressurization plate to pressurize the composite material compression test plate and the reinforcing piece, the gluing quality of the composite material compression test plate and the reinforcing piece is guaranteed, extruded residual glue is contained in the glue overflowing groove, and the cleanliness of the periphery of the composite material compression test plate is guaranteed.

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 utility model discloses a composite material compression test piece positioning tool which comprises a positioning block assembly, the positioning block assembly comprises an upper positioning block and a lower positioning block, and opposite plate surfaces of the upper positioning block and the lower positioning block are respectively provided with positioning raised lines corresponding to an upper notch and a lower notch; reinforcing sheet placing areas are respectively formed on two sides, corresponding to the positioning raised lines, of the upper positioning block and the lower positioning block; the baffle assembly comprises a left side baffle and a right side baffle, and the left side baffle and the right side baffle are arranged on the left side and the right side of the positioning block assembly respectively and connected with the upper positioning block and the lower positioning block through fasteners respectively; the positioning pin assembly comprises a plurality of positioning pins, a plurality of vertically corresponding positioning grooves are formed in the front ends and the rear ends of the upper positioning block and the lower positioning block respectively, and the positioning pins are inserted into the corresponding positioning grooves. According to the utility model, the symmetry of two reinforcing sheets is ensured, the stability of the reinforcing sheets in the positioning process is ensured, and the precision of a test piece is improved.