135 results about "Structural testing" patented technology

The invention discloses a multi-scale performance evaluation and optimization method and device for well cementation cement stone, and relates to the technical field of oil exploitation, the well cementation cement stone is subjected to nanoindentation test and scanning electron microscope microstructure test, and a mechanical property-microstructure test result is obtained; performing electronic computer tomography and mercury injection test on the well cementation cement stone, and constructing a pore network three-dimensional model; performing triaxial mechanical property test, thermogravimetric analysis and thermal expansion test on the well cementation cement stone to obtain a thermal-mechanical coupling test result; performing X-ray diffraction and X-ray fluorescence spectrum analysis on the well cementation cement stone to obtain mineral phase information and element information of the cement stone; according to the method, a mechanical property-microstructure test result, topological parameters, a thermal-mechanical coupling test result, cement stone mineral phase information and element information are fused, an optimal design scheme for target well conditions is generated, multi-dimensional performance testing and characterization are achieved, and an accurate basis is provided for well cementation cement stone optimal design and quality control.

The invention discloses a torsional shear mechanical property testing device and method for a hollow cylinder structure, and belongs to the technical field of mechanical structure testing. The device comprises an axial driving mechanism, a radial driving mechanism and a fixed supporting mechanism. The axial driving mechanism is connected with the axial actuating pressure plate through an actuating main shaft; the radial driving mechanism comprises a radial driving mandrel of an inverted conical structure and a driving sliding plate matched with the radial driving mandrel, and axial movement of the main shaft is converted into radial expansion movement through conical face fit. The fixed supporting mechanism is a closed supporting system composed of an outer sleeve, an upper cover plate and a base. Through the unique inverted conical structure design, independent or synchronous application of axial compression, radial expansion and torsional shear loads can be achieved, and the complex stress working condition is effectively simulated. The device has the advantages of being stable in structure, high in testing precision, easy and convenient to operate and the like, meanwhile, equipment universality and maintenance convenience are remarkably improved through the replaceable design of the driving sliding plate, and the device is suitable for mechanical property testing of various hollow cylindrical structural parts.

The invention relates to the technical field of explosion-proof robot detection, in particular to an explosion-proof robot 3R structure test platform and test method.The test platform comprises a test PC, a control cabinet and a motor, a panel is arranged at the top end of the control cabinet, and a demonstrator is arranged at one end of the control cabinet; the panel is uniformly provided with a plurality of station bearing assemblies used for installing to-be-tested pieces, and the two ends of the panel are provided with protective supports fixed to the control cabinet. The test PC is arranged on the protective bracket close to one side of the to-be-tested workpiece mounting bracket; fault indicating lamps are arranged at the tops of the protective supports; the station bearing assembly is used for installing and carrying a to-be-tested piece, the motor is used for driving a J4 shaft of the to-be-tested piece to rotate, track data, fault codes and motor data generated by the demonstrator are automatically integrated through the testing PC, a visual report containing risk identification is generated, and therefore the problems that an explosion-proof robot depends on a traditional testing method, the testing period is long, and the testing efficiency is high are solved. Fault positioning is difficult, and maintenance is inconvenient.

The invention relates to the technical field of high-voltage line mirror bracket safety testing, and discloses a high-voltage line mirror bracket split type safety link structure testing method and system. According to the method, plugging and bending tests are carried out on a high-voltage line mirror bracket split type link structure through a mechanical arm, and interface pressure and structure deformation image data are collected in real time. And analyzing interface wear and structural fatigue damage characteristics by using a pre-trained wear detection model, and outputting a real-time wear degree evaluation result. And after the test period is finished, integrating the multi-modal data and the evaluation result to generate a three-dimensional visual detection report, positioning a wear concentration position, marking an abnormal wear point and quantifying the structural safety level. According to the invention, the problems of incomplete test and inaccurate evaluation in the prior art are solved, and the product safety and reliability are improved.

The invention discloses a wear test device for reciprocating dynamic sealing of an actuator cylinder, and belongs to the technical field of actuator cylinder sealing wear test equipment.The wear test device comprises a main frame body and a test mechanism movably connected to the main frame body, a replaceable to-be-tested actuator cylinder structure is arranged on one side of the main frame body, and the test mechanism comprises a moving rod; the upper end and the lower end of the moving rod are provided with a limiting assembly and a counterweight assembly respectively, the moving rod is provided with a connecting piece, and the connecting piece is hinged to one end of a piston rod in the actuator cylinder structure to be tested. According to the method, the conventional motion of the output end of the actuator cylinder in a static state and the external non-axial acting force borne by the output end of the actuator cylinder in a dynamic state can be simulated, the reliability of the sealing ring in actual work can be comprehensively evaluated through combination of the two, verification is carried out from multiple dimensions, potential risks can be found, and the requirements of safety specifications in the fields of aviation, industry and the like are better met.

The invention discloses an intelligent design system and method for a building structure. The method comprises the following steps: S1, constructing a building database and a rule database; s2, inputting a construction area and a construction target; s3, generating multiple groups of building designs; s4, generating a simulated building structure, and performing a simulated building structure test; s5, submitting an architectural design result passing the test to an expert group appraisal platform, and scoring by an expert group according to an assessment condition; and S6, outputting a final building design result. Model simulation and testing are carried out after the building scheme is generated according to the construction target, unqualified building design schemes can be filtered and processed through the testing step, the follow-up expert review data volume is reduced, scoring is carried out after expert review, and the efficiency is improved. And some basic qualified design schemes can be optimized according to suggestions of expert appraisal, so that the finally obtained design schemes can be enabled to be richer, and the efficiency of generating the construction design schemes of the scheme is further ensured.

The utility model discloses a high-temperature fretting fatigue testing device, which belongs to the technical field of tenon connection structure testing and comprises an upper clamp and a lower clamp which are used for fixing a tenon sample and applying acting force to the tenon sample, and a digital integrated circuit (DIC) camera used for observing material deformation and crack progress of the tenon sample, a micro-motion cushion block used for supporting a tenon sample is arranged in the upper clamp, the upper clamp is sleeved with an electromagnetic induction coil, the electromagnetic induction coil is located at the contact area of the tenon sample and the micro-motion cushion block, an observation window is arranged between every two adjacent turns of coils of the electromagnetic induction coil, and the DIC camera faces the observation window and is as high as the observation window; the observation window is reserved between the two turns of coils, and the material deformation and crack initiation progress of the tenon sample can be recorded in real time through the DIC camera; and the clamp is connected with the bearing seat through the joint bearing, so that self-centering of the tenon sample can be realized, deflection torque is prevented from being introduced, and the shape control precision of a friction surface of a contact area is improved.

The invention discloses a dynamic performance testing system and method for a bistable structure, and belongs to the technical field of structure testing. The system comprises a workbench, a linear adjustment module, a clamping and angle adjustment module, a torque detection module, a stress detection module and a displacement detection module. The linear adjustment module is arranged on the workbench and is used for adjusting the boundary constraint of the tested structure; one end of the clamping and angle adjusting module is connected with the linear adjusting module, and the other end is fixed at the top of the torque detection module; the stress detection module is used for measuring steady state switching critical force, and the displacement detection module is used for detecting critical displacement. According to the invention, multi-parameter synchronous testing of the bistable structure under different boundary conditions is realized through modular design, dynamic response data of displacement, force and torque can be accurately obtained, and an effective testing means is provided for performance research of the bistable structure.

The present application relates to the field of connector testing, in particular to a connector-based locking structure testing method and system, comprising the following steps: building a multi-physical field coupling test environment to output a composite environmental stress; based on the actual application scenario of the to-be-tested locking structure, obtaining assembly deviation data, and obtaining an assembly deviation state through a preset multi-degree-of-freedom adjustable clamp; based on the physical data of the to-be-tested locking structure, constructing a three-dimensional model of the locking structure, giving real material mechanics parameters, inputting the composite environmental stress and the assembly deviation data into a finite element software for simulation testing, and outputting a simulation test data set; performing physical testing through the multi-physical field coupling test environment, and outputting a physical test data set; comparing and analyzing the simulation test data set and the physical test data set, and outputting a test report. The present application builds a multi-physical field coupling test environment, and combines a multi-degree-of-freedom adjustable clamp to make the test scenario closer to the real application working condition of the connector.

The invention relates to the technical field of structure testing, in particular to an overhead rigid suspension expansion joint fatigue test device and method, and the device comprises a fatigue host module which provides reciprocating vertical vibration power for an expansion joint; the comprehensive platform module is used for providing reciprocating horizontal vibration power for the fatigue host module; the control system module comprises a strain data processing unit which is used for constructing a three-dimensional strain field model and calculating stress distribution based on the strain data; the phase compensation generation unit dynamically generates lag compensation time of the horizontal vibration relative to the vertical vibration; and the driving control unit is used for adjusting the phase of the horizontal vibration in real time based on the lag compensation time, so that the horizontal vibration reaches the maximum displacement value at the vertical vibration peak moment. According to the invention, the authenticity, accuracy and reliability of the fatigue test of the expansion joint can be effectively improved, the phase and displacement synchronization of horizontal vibration and vertical vibration can be dynamically adjusted through a linkage control mechanism, and the spatial multidirectional composite fatigue load in actual operation can be reproduced.

The utility model discloses an experimental device for detecting locomotive plug pins, which relates to the technical field of locomotive detection equipment and comprises a support plate, a first support block and a second support block are respectively fixed on two sides of the upper end face of the support plate, and a test assembly is connected between the first support block and the second support block. The upper ends of the first supporting block and the second supporting block are connected with a cooling assembly, a U-shaped frame is fixed to the lower end face of the supporting plate, an elastic supporting structure is connected to the U-shaped frame, the testing assembly comprises a sub-plug fixed to the middle of the first supporting block, a female plug fixed to the middle of the second supporting block, and a testing wire is connected between the sub-plug and the female plug. The middle of the test wire is serially connected with a test bulb. According to the utility model, through cooperative use of the test assembly, the cooling assembly, the U-shaped frame, the elastic supporting structure and the vibration motor, the connection stability of the plug and the pin under the vibration condition can be tested, thereby ensuring the accuracy of detection data.

The present invention relates to a structural strength testing device and method for aluminum alloy windows using photovoltaic glass, and belongs to the technical field of aluminum alloy window testing; the testing device comprises a base, a test box is fixedly arranged on the upper end of the base, a supporting assembly is arranged on the lower side of the inside of the test box, the supporting assembly comprises a row of supporting rods on all sides and a supporting plate in the middle; the test box is provided with a positioning assembly at the upper end of the positioning frame, the positioning assembly comprises four push plates, and the four push plates are respectively slidably arranged inside the side walls of the test box; a testing assembly is arranged on the upper side of the inside of the test box, and the testing assembly comprises a horizontally movable column, a connecting plate is rotatably arranged at the lower end of the column, a hydraulic cylinder and an air cylinder are arranged at the lower end of the connecting plate, a pressure sensor is fixedly arranged at the telescopic end of the hydraulic cylinder, and a punch is fixedly arranged at the telescopic end of the cylinder; the problem that the testing means of the current aluminum alloy window structure testing device are relatively single is solved.

The application provides a kind of automobile tire performance detection test device and method, it is related to vehicle tire detection technical field, the device includes base, base is equipped with working condition simulation area and mounting bracket, working condition simulation area is equipped with replaceable test board;Test drive assembly includes test hub and test drive structure that is drivingly connected with test hub, test drive structure is set on mounting bracket;Test hub is located above working condition simulation area;Load simulation component includes load pneumatic structure that is set on mounting bracket and load execution structure that is set on test drive structure, pre-polishing component is set on test drive structure and is slidably connected with load execution structure, pre-polishing component is used to execute pre-polishing operation to test tire before test;Control component and test drive assembly, load simulation component, pre-polishing component are communicatively connected;The application truly reflects tire dynamic antiskid performance, and structure is composed of modular layout design, and it is convenient for on-site detection.

The application discloses an application testing method and device and electronic equipment, and relates to the field of data security. The method comprises the following steps: testing predetermined code based on a static demand rule to obtain a static demand test result; when the static demand test result is passed, testing the predetermined code based on a structure test rule to obtain a structure test result; when the structure test result is passed, matching the predetermined code based on a predetermined vulnerability library to obtain a vulnerability test result; when the vulnerability test result is passed, performing smoke testing on the predetermined code based on a smoke testing script to obtain a smoke test result; when the smoke test result is passed, testing the predetermined code based on a black-box test script to obtain a black-box test result; and determining a target test result of the predetermined application according to the black-box test result. The application solves the technical problem of low test efficiency in the prior art, in which the steps are complicated and mixed before the application is put online.

This invention belongs to the field of textile material testing, and relates to a moisture absorption testing device, specifically a moisture absorption testing device, its testing method, and its application. It includes a lifting platform, on which a testing device and a columnar material fixing tube are mounted. The testing device includes a testing plate and a core structure located at the center of the testing plate. The core structure is situated below the columnar material fixing tube and connected to a liquid reservoir via a liquid guide tube. The liquid reservoir is located above an electronic balance; the electronic balance is connected to a data acquisition unit. The dynamic moisture absorption process of the columnar material is recorded and characterized through the testing plate with its upper and lower perforations. This enables performance testing and characterization of upright columnar materials.

The application discloses a kind of arch structure system multipoint intelligent loading devices, relate to arch structure load test technical field, it includes two parallelly arranged arch structures, the lower portion of the arch structure is provided with loading assembly, the loading assembly includes motor, the output end of the motor is fixedly connected with carousel, and motor is used to drive carousel reciprocating rotation, and the circumferential direction of the carousel is fixedly connected with electric telescopic rod.By setting two parallel arch structures, and using electric telescopic rod to drive beam and roller to reciprocating rolling pressure on the top of arch structure, load test is carried out to two arch structures simultaneously, compared with prior art, only single arch structure test can be carried out once, can more truly simulate the situation that multiple arch structures in tunnel are stressed simultaneously, effectively solve the data deviation problem caused by single-point test, so as to more accurately screen out unqualified arch structure, improve the safety and stability of tunnel arch structure system.

This invention belongs to the field of structural axial force measurement systems, and discloses an adaptive pure axial force measurement system and method for high-temperature structural testing. By adaptively rotating the connecting threaded rod, this invention allows the direction of the force transmitted from the test piece to the spoke-type tension / compression sensor to be adjusted according to the deformation state of the test piece. This reduces the influence of additional bending moments, eccentric loads, and non-axial components on the measurement results, thereby improving the stability and accuracy of axial force measurement in high-temperature structural testing. This invention uses a spoke-type tension / compression sensor as the force measuring element. When the test piece undergoes axial tension, a tensile force is applied to the spoke-type tension / compression sensor; when the test piece undergoes axial compression, a compressive force is applied to the spoke-type tension / compression sensor. Therefore, it can meet the measurement needs of both tensile and compressive conditions in high-temperature structural testing.

This invention provides a ball-holding structure test socket. The connecting terminal is Y-shaped, with its upper end forked to form two elastic fastening tabs. The opposing upper surfaces of the elastic fastening tabs are arc-shaped. An array of limiting holes is provided on the upper cover corresponding to the elastic fastening tabs. The elastic fastening tabs pass through these limiting holes. During pressing down or springing up, the upper cover drives the two arc-shaped structures of the connecting terminal to separate or engage through the limiting holes. The two arc-shaped structures are tightly attached to and electrically connected to the solder balls of the chip under test. This overcomes the technical problem in the prior art where the connecting terminal easily fatigues during long-term repeated pressing, and insufficient elasticity leads to failure to form electrical contact with the solder balls.

The utility model provides a comprehensive device for investigating aging of a marine steel structure under the environmental influence of an atmospheric area, which relates to the technical field of aging test of marine steel structures and comprises a test box, the front surface of the test box is fixedly connected with a first motor, and the output end of the first motor rotatably penetrates through the front surface of the test box. When the device is used, the threaded rod is driven by the first motor to rotate, the movable plate can drive the electrified xenon lamp to be close to or far away from the steel structure test piece to be tested in rotation, the irradiation degree of light rays emitted by the xenon lamp to the steel structure test piece can be adjusted, saline water in the water tank is pumped through the pump body, and when the saline water is pumped into the atomization spray head, the atomization spray head can spray water to the steel structure test piece. When the xenon lamp is close to the steel structure test piece and the pump body increases the pumping speed, the aging speed of the steel structure test piece can be accelerated, and personnel can comprehensively inspect and test the aging of the steel structure in the atmospheric area.

This invention relates to a scaled-down rotating cable anchoring loading device and testing method, belonging to the field of civil engineering structural testing and measurement. It addresses problems such as eccentric loading, impure force distribution, unstable load, and poor spatial adaptation in traditional scaled-down models. The device comprises a box, a pulley guiding mechanism, a steel beam, and a top loading device. The box is secured to the scaled-down anchors using clamps or backfill. The pulley guiding mechanism consists of guide rails, a sliding table, vertical pulleys, and two sets of horizontal traction pulleys, allowing for three-dimensional adjustment to ensure the horizontal guidance of the cable. The top loading device employs a jack structure, using a lifting piston rod to vertically raise and lower the loading arm synchronously, applying horizontal tension and possessing a self-locking pressure-holding function, enabling long-term stable load holding. The testing method involves device installation, anchor and cable placement, pulley leveling, pre-loading, self-locking pressure holding, and data acquisition to complete the test. This invention achieves pure horizontal, high-precision, stable, and controllable loading. It features a compact structure, simple operation, and accurate acquisition of mechanical parameters, making it suitable for cable anchored scaled-down model testing.

The invention discloses a method and a device for quickly replacing an electronic paper (EPD) product inspection program, relates to the technical field of EPD product inspection, and aims at carrying out structure / scheme optimization on a conventional integrated test fixture and adopting a detachable independent test module design. Rapid replacement of inspection programs is achieved through the steps of program pre-burning, module rapid assembly, equipment debugging and product inspection, different programs can be pre-stored in a plurality of test modules, inspection of products of multiple models is adapted, an inspection jig main body and a plurality of independent test unit groups are taken as the main body, and the jig main body is provided with a signal butt joint, power supply and control structure. The test module is provided with a program storage structure, a product connection structure and an auxiliary detection butt joint structure, the module is detachably connected with the jig body, a fool-proof positioning structure is arranged, program burning does not need to be waited on site, a single module can be independently maintained and replaced, the detection efficiency and the jig utilization rate are greatly improved, and the production cost is reduced. The method is suitable for batch inspection of various electronic paper EPD products.

The utility model relates to PCB board test technical field, concretely relates to a kind of PCB board function test device, including bottom plate, still including test mechanism, test mechanism is located above bottom plate, test mechanism includes feeding structure, test structure, feeding structure includes the carousel rotation setting in bottom plate upper end, three moving grooves are set in carousel, moving groove inside is equipped with top plate, circuit board is placed in top plate upper side, and top plate is equipped with the clamping structure for clamping fixed circuit board in the side away from carousel center. Advantageous effect: through clamping structure clamping fixed circuit board, then using test structure to test the function of circuit board, after testing, drive carousel clockwise rotation, make circuit board rotate to carousel's unloading position, and then drive top plate to move upwards and lift circuit board upwards, make circuit board upper end higher than moving groove top end, and then facilitate to take circuit board, avoid to cause damage to circuit board, reduce the time of taking, improve the efficiency of test.

A non-structural test simulation frame disclosed by the present invention comprises a plurality of floor frames, each floor frame comprises a peripheral frame, a plurality of stiffening beams are fixedly connected in the peripheral frame, the peripheral frames and the stiffening beams are I-shaped steel beams, a plurality of square steel pipe columns are arranged between the upper and lower adjacent peripheral frames, and the square steel pipe columns and the peripheral frames are connected through bidirectional hinge supports. An elastic-plastic support is hinged between every two adjacent square steel pipe columns in each layer, reinforced concrete floors are fixedly connected to the top surfaces or the bottom surfaces of the peripheral frame and the reinforcing beams, a plurality of circular holes are formed in the reinforced concrete floors, and pipelines, floor frames and the reinforced concrete floors are arranged in the circular holes in a penetrating mode and used for simulating floors of a multi-story building; the elastic-plastic support comprises a belleville spring sleeve, and the two ends of the belleville spring sleeve are fixedly connected with a friction damper and a connecting square steel pipe respectively. The device can be used for simulating interaction of various non-structural systems and can also be used for testing non-structural members across floors.

This invention provides a ball-holding type test socket. The connecting terminal is Y-shaped, with two elastic locking tabs formed at the upper end of the terminal. The opposing surfaces of the upper ends of the elastic locking tabs are arc-shaped. During pressing down, the upper cover drives the two arc-shaped structures of the connecting terminal to engage via a movable plate. The two arc-shaped structures are tightly attached to and electrically connected to the solder balls of the chip under test. This overcomes the technical problem in existing technologies where the connecting terminal is prone to fatigue during long-term repeated pressing, and insufficient elasticity can lead to failure to form electrical contact with the solder balls. Furthermore, the interlocking connection between the two arc-shaped structures of the connecting terminal and the solder balls facilitates precise alignment, ensuring a good electrical connection. This overcomes the drawback of existing technologies where misalignment between the claw and the solder balls can affect the stability of the electrical connection.

The invention relates to a test and evaluation device (21) for calibrating bearing test benches (1, 20), comprising a plurality of bearing test benches (1, 20), each of which is designed as a friction test bench for testing a swivel bearing (2) having two bearing rings (6, 7). The test and evaluation device (21) further comprises data capture devices (17, 18) which are assigned to individual bearing test benches (1, 20) and which are connected to a common data processing unit (19) which is designed to compare specific properties of the bearing test benches (1, 20) with one another.

The invention relates to the technical field of nuclear island structure testing, and provides a nuclear island structure contact surface mechanical property detection device and method. Comprising a vibration table, a second plant model arranged on the table top of the vibration table in a pouring mode, a first plant model arranged on the second plant model in a pouring mode and a sensor unit arranged on the first plant model and / or the second plant model, and the sensor unit is at least used for obtaining mechanical parameters. By pouring the first plant model on the second plant model, the device can truly reproduce the contact relation of pouring first and pouring later and the interface forms of concrete-concrete and concrete-steel plates, and the vibration table is used for applying earthquake dynamic load and can be integrated with a weighting device, a temperature control system and the like to realize a static load-temperature-dynamic coupling test.

The utility model relates to the related technical field of steel structure testing, in particular to a combined type steel supporting and bearing capacity testing device which comprises a base, a top plate arranged above the base, a vertical column installed in the center of the base, a first telescopic piece installed at the top end of the vertical column, and a placing plate installed at the top end of the first telescopic piece. The outer wall of the vertical column is sleeved with a rotating sleeve, the outer wall of the rotating sleeve is connected with a rotating disc, two third telescopic pieces are symmetrically installed at the top end of the rotating disc, fourth telescopic pieces are installed at the ends of the third telescopic pieces, and fifth telescopic pieces are installed at the top ends of the fourth telescopic pieces. The end part of the fifth telescopic piece is connected with an extrusion block, a pressure gauge is arranged on the fifth telescopic piece, and the position of the extrusion block is adjusted through the cooperation of the telescopic pieces, so that the extrusion block can carry out extrusion test on steel fastener parts with different shapes and sizes, and the use effect is better.

The invention provides a system and a method for testing a thermal expansion coefficient of a flexible substrate assembly under a constant tension condition. The system comprises a high-low temperature box, a loading strip, a dial indicator, a substrate connecting rope, a constant force counterweight structure, a test board and a tested flexible substrate, the high-low temperature box is placed on the test board, and the inner side of the high-low temperature box can adjust the temperature; a tested flexible substrate is placed in the high-low temperature box, one end of the tested flexible substrate is fixed in the high-low temperature box, and the other end is connected with a plurality of substrate connecting ropes; the substrate connecting rope extends outwards and penetrates through the outer side of the high-low temperature box; the constant-force counterweight structure is arranged on one side, corresponding to the substrate connecting rope, of the test board; the loading strips are fixedly connected to the substrate connecting rope and the constant force counterweight structure respectively, and the loading strips are elastically connected; a plurality of dial gauges are arranged and are respectively fixed on the test board, and the measuring ends of the dial gauges are connected to the loading strip close to the tested flexible substrate and are respectively used for measuring the horizontal movement distance of the loading strip. The device has the effects of testing the thermal expansion coefficient under the constant tension load of the flexible substrate and uniformly loading the tension.

The present invention discloses a test device for composite sandwich structures and a method for testing type I fracture toughness. The test device includes: a guide rail; a test connection structure fixed relative to the guide rail; a guide slider slidably connected to the guide rail; a specimen connection structure detachably fixed to the slider; a loading connection structure; and a crack detection device. The method for testing type I fracture toughness is applicable to any of the composite sandwich structure test devices mentioned above, and includes the following steps: preparing a composite sandwich structure specimen; installing the composite sandwich structure specimen on the test device, and installing the composite sandwich structure test device on a universal testing machine; adjusting the crack detection device; initial loading; secondary loading; recording the load value, displacement value, and effective crack extension value; after the test is completed, the chuck of the universal testing machine is loosened, and the computer calculates the G of the composite sandwich structure specimen. IC value, export the test results, and make load-displacement curve and R curve.