75 results about "Material Stretched" patented technology

The utility model discloses a variable-rigidity high-temperature test composite material tensile test piece and a forming mold, relates to the technical field of composite material forming, and solves the problems that the test quality is influenced and even a reinforcing sheet is separated from a test piece body due to necking when the reinforcing sheet is adhered to the existing test piece in a tensile test. According to the utility model, a plurality of main fiber layer middle sections are continuously stacked together to form a tensile test piece main body; a plurality of thickening fiber layers are arranged at the two ends of the tensile test piece main body, and are alternately laid among the plurality of main fiber layers to form a dumbbell-shaped structure; sawtooth structure layers are arranged on the inner sides of the upper surface first main fiber layer and the lower surface first main fiber layer at the two ends of the tensile test piece main body. According to the utility model, the condition that the tensile test piece is locally compressed or extruded to damage the test piece under a clamping load is effectively avoided; the sawtooth structure layer is additionally arranged to be matched with sawteeth of the clamping tool to form mutual meshing of structures, so that good transfer of loads between the clamping tool and the test piece is ensured.

The invention belongs to the technical field of material tensile tests, and particularly relates to a building material tensile strength testing device which comprises a testing device body, a shell is arranged above a supporting frame, a conveying mechanism is arranged on the rear side of the shell, and a partition mechanism is arranged at the tail end of the conveying mechanism. A partition mechanism is arranged in the shell, a material taking and placing mechanism is arranged on one side of the partition mechanism, stretching detection mechanisms are arranged in the positions, located on the two sides of the partition mechanism, of the shell, a mounting assembly is arranged on one side of the driving assembly, a clamping mechanism capable of being transversely adjusted in a sliding mode is arranged on the front side of the mounting assembly, and a pressing mechanism is arranged on one side of the clamping mechanism. According to the invention, stretching detection and strength detection functions are integrated, the use functionality of the device is improved, smooth proceeding of different detection work is ensured, the automation degree of the device is improved, the investment of labor cost is reduced, the labor intensity is reduced, the working progress is improved, and the use requirements are met.

The utility model relates to the technical field of metal detection, in particular to a metal material tensile bending test device which comprises a supporting table, a supporting column, a supporting plate, a working table, a performance test assembly and a protection assembly, the supporting table and the supporting plate are stacked up and down and arranged in parallel, the working table is connected to the supporting table, and the performance test assembly is connected to the working table. The performance testing assembly comprises a bending assembly and a stretching assembly, the stretching assembly is connected to the workbench, the bending assembly is arranged above the stretching assembly, and the protection assembly is connected to the supporting table. According to the metal material performance testing device, when the bending assembly is used, the bending assembly moves downwards to trigger the protection assembly, the protection assembly and the bending assembly move synchronously and oppositely, the protection assembly moves to the position flush with the workbench to be matched with the supporting plate to form a closed space, and a metal material is tested by the performance testing assembly in the space; and metal chips generated by testing are prevented from splashing to injure surrounding mechanical equipment and workers.

The invention discloses a composite material tensile sample reinforcing sheet bonding tool and a bonding method thereof. The bonding tool comprises a clamping plate, an upper top plate and a lower top plate, a plurality of screw holes are formed in the edge and the center of the clamping plate, and square cushion blocks with through holes in the centers are arranged at the positions of the screw holes in the two sides of the clamping plate; a plurality of sample grooves are formed in the clamping plate and penetrate through the clamping plate, and the sample grooves are matched with samples in shape; screw holes are formed in the edges and the centers of the upper top plate and the lower top plate; a plurality of reinforcing sheet grooves are symmetrically distributed in the upper sections and the lower sections of the upper ejection plate and the lower ejection plate along the vertical center line respectively, the reinforcing sheet grooves are matched with the sample grooves, a reverse ejection hole is formed in the center of each reinforcing sheet groove, and a glue overflow hole is formed in the corner of each reinforcing sheet groove. By controlling the position between the sample and the reinforcing sheet, fixing the bonding position between the sample and the reinforcing sheet and adopting pressurized demolding, the reinforcing sheet in the obtained composite material tensile sample is precise in bonding and excellent in bonding performance.

The present invention discloses a method, device, medium, and product for testing the tensile mechanical properties of metal materials, relating to the technical field of material mechanical property testing. The method comprises: obtaining a force-deflection curve of a target metal material; determining a first area and a second area based on a first deflection point, a second deflection point, and a third deflection point and the force-deflection curve; calculating the yield strength and tensile strength of the target metal material based on the first area and the second area; calculating material parameters based on the yield strength and tensile strength of the target metal material; and obtaining a true stress-strain curve of the target metal material based on the material parameters and the Hollomon formula. The present invention only requires simple processing of the force-deflection curve of a small punch test to quickly obtain the material's yield strength, tensile strength, and true stress-strain curve. The obtained results are highly accurate and the principle is simple, making them convenient for engineering applications.

The invention relates to the technical field of composite material testing, in particular to a recycling method and device for composite material tensile fragments, and the method comprises the steps that the bottom of a protective cover is adjusted to a preset inclination angle through an angle adjusting mechanism; covering a protective cover outside a clamping block for clamping the composite material in the tensile test device, so as to collect fragments generated in the tensile process of the composite material through the protective cover; the fragments in the protective cover are blown to the bottom of the protective cover through a plurality of air injection assemblies; and the fragments at the bottom of the protective cover are adsorbed through the movable suction cup and transferred to a preset recycling area outside the protective cover. According to the technical scheme, splashing fragments can be blocked through the protective cover, the fragments are guided to fall to the bottom of the protective cover in a concentrated mode, meanwhile, the fragments attached to the side wall of the protective cover and clamped in the grooves of the clamping blocks are blown through the air injection assemblies, and the collection efficiency of the composite material tensile fragments is improved.

The utility model discloses mechanical stretching stamping equipment for an aluminum extrusion part, which relates to the technical field of aluminum extrusion part production and comprises a fixed mounting base plate, a stamping die plate is detachably mounted at the top end of one side of the fixed mounting base plate, and a stretching plate is fixedly connected to the top end of the side surface of the fixed mounting base plate. The stamping die disc is directly mounted on the fixed mounting base plate in a buckled mode, the aluminum materials stretch into the fixing frame through the feeding arrangement groove, the position, in the fixing frame, of the threaded extrusion rod is rotated by rotating the top disc, and the aluminum materials are extruded and fixed through the extrusion disc; the two sides clamp and fix aluminum materials at the same time, the stretching driving motor controls rotation of the threaded driving rod, so that the sliding adjusting base plates are directly controlled to slide at the top end in the stretching disc to adjust the positions, and the distance between the sliding adjusting base plates on the two sides is adjusted, so that stretching operation of the aluminum materials can be achieved.

The invention provides a metal material tensile mechanical testing device, and belongs to the technical field of mechanical testing. The problems that an existing clamping structure is complex, and the sample clamping process is tedious in operation are solved. According to the metal material tensile mechanical testing device, tensile testing assemblies slidably arranged on guide columns are arranged above and below a workbench, a rectangular groove is formed in the front side wall of the middle of the workbench in the width direction of the workbench, and scales are arranged on the portion, located on one side of the rectangular groove, of the upper surface of the workbench in the length direction of the rectangular groove; a front pressing block and a rear stopping block which can slide front and back are arranged in the rectangular groove, and the front pressing block can move out of the rectangular groove from a front end opening of the rectangular groove. The stretching test assembly comprises a stretching body, a containing groove is formed in the middle of the end, facing the workbench, of the stretching body, and clamping limiting blocks capable of sliding in the left-right direction are arranged at the end and located on the left side and the right side of the containing groove. The structure solves the problems that the clamping structure in the device is complex and the sample clamping process is tedious to operate.

The invention discloses a method for constructing a digital twinborn model in a tensile damage process of a titanium-clad steel material, which is characterized by comprising the following steps of: S1, performing geometric modeling and grid division on a titanium-clad steel sample to be analyzed, setting boundary constraint, defining titanium steel contact and optimizing load distribution so as to establish a finite element model of a titanium-clad steel composite structure; s2, performing titanium-clad steel tensile test finite element analysis according to the titanium-clad steel composite structure finite element model, and establishing a titanium-clad steel sample tensile damage simulation model; s3, parameterizing an input quantity and an output quantity in the titanium-clad steel sample tensile damage simulation model by adopting an ANSYS Workbench platform, and then carrying out experimental design; s4, performing order reduction on the titanium-clad steel sample tensile damage simulation model subjected to experimental design by adopting a Response Surface Method response surface method to generate an order reduction model FMU file, and importing the order reduction model FMU file into ANSYS Twin Builder to construct a titanium-clad steel tensile damage model digital twin model; and S5, evaluating the digital twin model of the titanium-clad steel tensile damage model, and then carrying out titanium-clad steel tensile damage analysis. According to the method, the mechanical property data of the titanium-clad steel sample is obtained in the virtual space mapping model, and the entity operation state and the virtual space mapping result are comprehensively analyzed, so that the deep research on the tensile damage of the titanium-clad steel sample is finally realized, and the stability and the safety of the titanium-clad steel material in ocean engineering equipment are ensured.

The utility model belongs to the technical field of metallurgy, and particularly provides equipment for separating a steel sample from a slag sample, which comprises a bracket and a beating plate mechanism for beating materials, a clamping mechanism used for clamping materials is installed on the support. The beating plate mechanism comprises a first beating plate, a first driving piece, a second beating plate and a second driving piece; a flapping area for materials to extend into is formed between the first flapping plate and the second flapping plate; the output end of the first driving piece is connected with the first beating plate and drives the first beating plate to move in the direction perpendicular to the material stretching-in direction; the output end of the second driving piece is connected with the second beating plate, and the second beating plate is driven to move in the direction perpendicular to the material stretching-in direction. Furthermore, a vibration device is installed on the first beating plate and / or the second beating plate. The equipment can effectively separate a steel sample from a slag sample, so that the separation efficiency is improved, and the labor cost is reduced. And dangerous conditions possibly occurring during manual separation are effectively avoided, continuous operation can be achieved, and the production efficiency is further improved.

The present invention discloses a pressure processing device, comprising a lower die set and an upper die set. The lower die set is used to place a circulation tooling on which a component to be processed is placed. The upper die set is arranged above the lower die set. The upper die set and the lower die set can move relative to each other in the vertical direction. The upper die set includes a pressing structure. The pressing structure can stretch the flexible material in the component to be processed during the relative movement of the upper die set and the lower die set, and make the flexible material in the component to be processed fit with a shell part with an open upper end when the upper die set and the lower die set are combined. Through this pressure processing device, the flexible material is first stretched as a whole before the mold is closed, and then the flexible material stretched to a shape close to the final stretched shape is fit with the inner surface of the shell part when the mold is closed.

The utility model discloses a face guard leather material positioning fixture structure relates to face guard production technical field, including the first frame edge and second frame edge of symmetrical setting, and the second frame edge is installed in the both sides of first frame edge. First frame edge contains pedestal, and the upper portion slidingly connected slider of pedestal, and first frame edge and slider top all are equipped with the positioning boss column, for fixed face guard leather material. The top of pedestal is equipped with the limit boss and limit passage, and the passage is embedded with the dowel, and the dowel is connected with slider and is externally equipped with spring, and the both ends of spring respectively abut the dowel and the step protruding in the passage, realizes the buffer. The slider slides in the slide, and its tail end is equipped with second stop lug, and the first stop lug of the top of pedestal cooperates and restricts the sliding range. The cavity in the middle part of slider and slide jointly promote the sliding stability. This structure when face guard leather material forming, through the slider displacement relief leather material stretch, reduce the wrinkle, the leakage, promote face guard finished product quality and production efficiency.

A kind of anti-wave floating structure and the breakwater, protection system and offshore platform comprising it, the floating structure includes floating structure unit and connecting unit, the floating structure unit includes a plurality of anti-wave floating thick plate combination, it is a columnar structure in length direction, columnar structure cross section shape is triangle, trapezoidal, rectangular, H, Y etc., the anti-wave floating thick plate includes thick plate body, reinforcing rib and protrusion;Two sides of the thick plate body are equipped with water-permeable hole, the protrusion is stretched or bent by the HDPE material of water-permeable hole position Forming;The reinforcing rib is the long strip structure made of HDPE thick plate, the reinforcing rib is fixedly connected with hollow fixing hole in the protrusion;By the arrangement and combination of multiple groups of the floating structure unit in the water surface needing protection and the connection anchoring, the problems of poor anti-wave performance, low overall structural strength, high construction, installation and operation and maintenance cost of traditional offshore floating structure are solved.

The utility model provides aluminum honeycomb material stretching and cutting equipment, which relates to the technical field of aluminum honeycomb material processing, and comprises a stretching mechanism, the stretching mechanism comprises a fixed pin module and a movable pin module, the fixed pin module comprises a first driving mechanism and a first pin group, and the movable pin module comprises a second driving mechanism and a second pin group. The first driving mechanism drives the first contact pin group to be inserted into the aluminum honeycomb stacked block and separated from the aluminum honeycomb stacked block, the movable contact pin module comprises a second driving mechanism and a second contact pin group, the second driving mechanism drives the second contact pin group to be inserted into the aluminum honeycomb stacked block and separated from the aluminum honeycomb stacked block, and the stretching mechanism further comprises a first movable module. The first moving module drives the moving pin inserting module to linearly move in the first direction so as to stretch the aluminum honeycomb stacked block, and the first direction is the stretching direction of the aluminum honeycomb stacked block; and the cutting mechanism comprises a cutter, a third driving mechanism and a second moving module, the second moving module moves the cutter to the cutting position in the first direction, and the third driving mechanism drives the cutter to cut the aluminum honeycomb stacked block.

The invention relates to the technical field of composite material detection, and provides a composite material tensile strength detection device and method.The composite material tensile strength detection device comprises an assembly frame, a partition plate is transversely and fixedly connected to the middle of the interior of the assembly frame, and the interior of the assembly frame is divided into a detection cavity A and a detection cavity B through the partition plate; and a sealing door for sealing the detection cavity A and the detection cavity B is assembled on one side of the assembly frame. The invention also provides a method for detecting the tensile strength of the composite material, which comprises the following steps of: 1, assembling the positioning clamping plate with the corresponding shape on the carrying shaft rod according to the shape of the composite material; secondly, the two composite materials are arranged in the detection cavity A and the detection cavity B respectively, and the ends of the composite materials are positioned through positioning clamping plates. By means of the technical scheme, the technical problem that in the prior art, there is no effective environment simulation measure, and deviation occurs between measured data and specifically applied data very easily is solved.

The invention belongs to a plastic processing technology, and relates to a forming method for improving the cementing property of a titanium alloy paddle wrapping piece. The method is suitable for forming the non-uniform-section inverted-V-shaped narrow-cavity integrated titanium alloy wrapping piece with the torsion angle, and solves the problems that in the prior art, the requirement for the bonding condition of the titanium alloy blade wrapping piece is high, the roughness uniformity and deformation are difficult to guarantee through sand blasting after the narrow-cavity characteristic is formed, and the like; on the premise of meeting the material deformation amount required by hot forming, control over the roughness of material stretching in the hot forming process, material corrosion in the acid pickling process and the like is guaranteed, the roughness uniformity of the bonding face of the blade wrapping piece is improved, and the bonding success rate and bonding uniformity of the blade wrapping piece are improved.

The application provides a method for evaluating the cold-rolling workability of high-silicon non-oriented silicon steel and a production method of high-silicon non-oriented silicon steel. The evaluation method is as follows: after normalizing, rectangular tensile samples are taken from the edge and middle of the steel coil along the plate width; the samples are processed into samples with a width of b and a length of l0; the edge and middle rectangular tensile samples are respectively placed on a material tensile testing machine for tensile testing until the samples are broken, and the actual length of the samples when broken is recorded as l 边 and l 中 , and i=(l 边 -l0) / (l 中 -l0)×100% is calculated; the cold-rolling workability of the high-silicon non-oriented silicon steel is evaluated according to the calculated i value. When i is greater than or equal to 75%, the high-silicon non-oriented silicon steel can be smoothly produced by cold rolling; when 75%>i≥60%, the cold-rolling process needs to be optimized and the auxiliary cold-rolling process is used; when i is less than 60%, the cold-rolling production cannot be directly and smoothly completed, and the edge needs to be trimmed.

The present invention relates to a test assembly for material tensile shear performance testing, the test assembly comprising: a loading disc; and a clamp, the clamp comprising an upper end clamp and a lower end clamp, the upper end clamp and the lower end clamp clamping an edge portion of the loading disc from above and below respectively via respective clamping slots, the clamping slots of the clamp being shaped to fit the edge portion of the loading disc such that relative movement of the clamping slots and the edge portion is prevented when the clamp is clamped and the edge portion is allowed to slide along the clamping slots and the loading disc is allowed to rotate when the clamp is unclamped.

The utility model belongs to the field of test appliances and devices, and particularly discloses a tensile and creep endurance test device for a brittle material. The device comprises a chuck, a wedge-shaped lifting shoulder, a sliding ball, a pin and an adapter. The device is connected with a testing machine through pins, and the insertion directions of the upper and lower pins are vertical, so that the influence caused by coaxiality is effectively reduced; the clamping part and the wedge-shaped lifting shoulder are provided with arc grooves, balls are arranged in the clamping part and the wedge-shaped lifting shoulder, the balls can automatically slide in the preloading process after the sample is placed in the clamping part and the wedge-shaped lifting shoulder, the wedge-shaped lifting shoulder can automatically clamp the sample, the problem of non-coaxiality in the operation process is further solved, and the sample can be easily picked after the test is finished through the structure. The device provided by the utility model is easy and convenient to operate, and can effectively improve the accuracy and the working efficiency of the performance test of the ceramic in the high-temperature environment.

The utility model relates to the technical field of stretching machines, in particular to a driving movable type fixing and clamping mechanism for stretching aluminum materials and a stretching machine, the driving movable type fixing and clamping mechanism comprises a working table, a rotating device capable of rotating is arranged at the center of the top end of the working table, and a placing table used for placing an aluminum plate is arranged at the top end of the rotating device. A limiting device for preventing the aluminum plate from deviating is movably arranged at the top of the containing table, an auxiliary limiting device for preventing the aluminum plate from deviating upwards is arranged at the top end of the limiting device, and stretching assemblies capable of being away from the containing table at the same time are movably arranged at the two ends of the workbench. When the stretching assembly stretches the aluminum plate, the limiting device limits the two sides of the aluminum plate, deviation of the aluminum plate during stretching is avoided, the aluminum plate is stretched in multiple directions through the stretching assembly, deviation of the aluminum plate is prevented, and the problems that the aluminum plate is inconvenient to stretch in multiple directions, and the aluminum plate is prone to deviation are solved.

The utility model provides a tensile strength testing device for a high-temperature pipeline material, which is characterized in that a moving structure, a fixed structure and a driving structure are respectively arranged on a base, the moving structure is arranged on one side of the base and can slide relative to the base, and the fixed structure is arranged on the base. The fixing structure and the moving structure are arranged on the same side of the base, the fixing structure is connected with the base, the moving structure is pushed by the driving structure to move to achieve stretching, in addition, a fixing assembly is further arranged, the fixing assembly comprises an inclined press-fit module, and the inclined press-fit module is connected with the fixing structure. The inclined pressing module is used for gradually increasing the pressing force during stretching, the moving structure and the fixed structure are provided with the fixing assembly used for fixing a pipeline sample, and in the stretching process, due to the fact that the inclined pressing module gradually increases the pressing force on the pipeline sample, the pipeline sample is prevented from falling off; the problem that a pipeline sample is prone to falling off in the stretching process is solved, and the beneficial effects of being safe and stable are achieved.

The invention belongs to the technical field of material stretching testing, and particularly relates to an axial stretching device for a workpiece with internal pressure and a testing method. The axial stretching device for the workpiece with the internal pressure comprises a test tool used for clamping the workpiece, wherein the test tool comprises a baffle guide rail; the first baffle is fixedly arranged on the baffle guide rail; the second baffle plate is movably arranged on the baffle plate guide rail, a workpiece to be tested is arranged between the first baffle plate and the second baffle plate, and the workpiece to be tested is connected with a pressure supply system; a tension sensor is arranged between the first baffle plate and the second baffle plate, and after the second baffle plate moves relative to the first baffle plate until the workpiece to be tested can be pre-tightened, the tension sensor is zeroed.

The invention relates to the technical field of tensile tests, in particular to a metal material tensile property detection device which comprises a detection chamber, and the temperature in the detection chamber can be adjusted; the stretching mechanism is arranged in the detection chamber and used for stretching the sample in the transverse direction, the stretching mechanism comprises two clamps and a driving part, and the two clamps are movably arranged in the transverse direction; the material receiving groove is formed in the inner bottom of the detection chamber and is positioned below the clamp; the material pushing mechanism comprises a driving module and two material pushing parts, the two material pushing parts are located in the material receiving groove and can move relative to the material receiving groove in the transverse direction, and the driving module is used for driving the two material pushing parts to be close to or away from each other in the transverse direction; the detection unit is configured as follows: when the two material pushing parts push the end parts of the two sections of samples falling into the material receiving groove to abut against each other, the driving module stops acting immediately; therefore, hands can be prevented from being scalded, and the problem of inaccurate measurement caused by shortening of the sample after the sample is taken out for measurement can be avoided.

The application provides a biaxial stretching device for material stretching experiment, and relates to the field of load test benches, which comprises a base, a solid propellant arranged on the base and used for bearing the solid propellant, a plurality of sliding rails fixed on the base and arranged radially around the solid propellant, a plurality of sliding blocks respectively slidably connected to the sliding rails, a plurality of push rods, the top end of each push rod is movably connected to a bearing table, the bearing table is used for bearing downward pressure load, the other end of each push rod is respectively pivotally connected to each sliding block, and each stretching assembly has a chuck, each chuck is used for clamping the solid propellant from different directions. Through the limiting effect of the first speed limiting device and the second speed limiting device, the moving speed of the first chuck and the second chuck is different from the moving speed of the third chuck and the fourth chuck, that is, four different stretching loads can be applied to the solid propellant from four directions, so that the demand of stretching test can be met.

The utility model discloses an air suction structure for a wear-resistant fabric cutting device, and belongs to the technical field of fabric cutting. An air suction structure for a wear-resistant fabric cutting device comprises a working panel, a plurality of air suction holes, a plurality of air suction holes, a plurality of air suction holes, a plurality of air suction holes and a plurality of air suction holes, and is characterized in that the working panel is constructed into a hollow plate-shaped structure; one end of the first conduit is communicated with the working panel, and the other end is communicated with the vacuum pump; the material stretching pipes are arranged above the working panel, the two material stretching pipes are oppositely arranged, a plurality of material stretching openings are formed in the surfaces of the material stretching pipes, and the material stretching pipes communicate with the first guide pipe; the driving assembly is movably connected with the material stretching pipe so as to drive the material stretching pipe to move and rotate; in the material receiving state, the two material stretching pipes move in the direction close to each other and rotate; in the material stretching state, the two material stretching pipes move in the direction away from each other. The air suction structure for the wear-resistant fabric cutting device has the beneficial effect that the air suction structure for the wear-resistant fabric cutting device can stretch and flatten the fabric.

The utility model relates to the technical field of composite film manufacturing, in particular to a three-proofing fabric composite film pressing device which comprises a box body, a feeding port is formed in the top end of one side of the box body, a discharging port is formed in the bottom end of the side, opposite to the feeding port, of the box body, and first fixing blocks are fixedly arranged on the two sides in the box body. A main fixing wheel is movably arranged between the two first fixing blocks through a rotating shaft, and first threaded rods are movably arranged at the top ends of the first fixing blocks through threads. When the stretching strength of materials needs to be adjusted, the clamping blocks are moved out of the fixing grooves by rotating the second handles on the two sides, the positions of the tightening wheels are adjusted, the second handles are rotated and fixed, and therefore the stretching strength between the materials is adjusted; and meanwhile, under the action of the air cooler, the materials with residual heat are rapidly cooled through cold air, and the situation that the materials adhere to one another due to the residual heat in the winding process, and consequently the materials are scrapped is avoided.

This invention belongs to the field of material mechanical property testing technology, and relates to a SiC f A high-throughput testing fixture and method for tensile proportional limit of SiC composite materials is presented. For small-sized Y-shaped end specimens, a corresponding fixture is designed to connect multiple specimens end-to-end, and the self-locking mechanism between the specimens and the fixture effectively transfers the testing machine load to the gauge length of each specimen. The tensile stress on each specimen's gauge length is determined through stress analysis, considering the fixture's self-weight. The tensile strain of each specimen is determined based on the average value of strain gauges attached to the front and rear surfaces of the specimen's gauge length during loading. Multiple SiC composites can be tested simultaneously in a single tensile loading operation. f The tensile stress-strain curve of SiC composite specimens is tested to determine the tensile proportional limit and tensile modulus. This greatly improves experimental efficiency and enables the determination of SiC... f High-throughput testing of the tensile proportional limit of SiC composite materials can ensure precise alignment of the specimen with the loading line of the testing machine and eliminate data dispersion sources related to specimen loading.

The utility model discloses a titanium material stretching device which comprises a U-shaped frame (1), the top of the U-shaped frame (1) is in threaded connection with a threaded rod (2), the bottom of the threaded rod (2) penetrates through the top wall of the U-shaped frame (1) and extends into the U-shaped frame (1), the end, away from the U-shaped frame (1), of the threaded rod (2) is fixedly connected with a rotating rod (3), and the end, away from the rotating rod (3), of the threaded rod (2) is rotationally connected with a fixing ring (4). Two grooves (5) are formed in the inner wall of the U-shaped frame (1), first sliding rods (6) are fixedly connected to the interiors of the two grooves (5), springs (7) are fixedly connected to the interiors of the two grooves (5), first sliding blocks (8) are fixedly connected to the outer walls of the two first sliding rods (6), and the bottoms of the first sliding blocks (8) are fixedly connected with the tops of the springs (7); the sides, close to each other, of the first sliding blocks (8) are fixedly connected with a containing ring (9).

The invention provides an engineering material tensile experiment strain measurement method and a related device, and belongs to the technical field of engineering experiments. The method comprises the steps of obtaining an image in an engineering material stretching process; performing image segmentation on the image in the stretching process of the engineering material to obtain contour information of the engineering material; performing feature point matching on the contour information of the engineering material to obtain displacement change information of feature points on the surface of the engineering material in the stretching process; and obtaining a local strain measurement result of the engineering material based on the displacement change information of the feature points on the surface of the engineering material in the stretching process. The problem that the accuracy of strain measurement of the tensile experiment of the engineering material is not high is solved.