353 results about "Tension compression" patented technology

The invention discloses a mechanical biaxial tension tester with variable proportion loading, relating to a biaxial tension tester. The invention solves the problem that the traditional biaxial tension testing device can not realize variable proportion loading under a complex loading path. In the invention, a slanting slide block is an inverted trapezoidal quadrangular frustum pyramid, a workbench is provided with a cruciform chute, a cruciform test piece is arranged above the cruciform chute, four ends of the cruciform test piece are respectively and fixedly connected with a clamping head, a tension-compression sensor is fixedly connected to the outer end surface of each clamping head, the outer end of each tension-compression sensor is fixedly connected with a horizontal slide block, each horizontal slide block is installed on the workbench, the lower end of each slant beam is fixedly connected with a horizontal slide block, a rolling bearing is installed at the upper end of each slant beam, and each rolling bearing is contacted with a corresponding trapezoidal inclined plane of each slant beam and rolls on the corresponding trapezoidal inclined plane of each slant beam. The invention is suitable for a tension test of the cruciform test piece.

This invention relates to one constant pushing test machine in metal materials stretching test technique field, which comprises machine rack, drive part and force test part, wherein, the rack is composed of socket, stand column, level beam and rack leg; the stand column is fixed onto socket with top end connected to beam to form one frame to fix drive and test parts; the drive part passes level beam fixed onto rack beam through drive screw or drive screw bar; the force test part is fixed on down end of drive part to realize puling and compressing data test.

The invention discloses a tension-compression-torsion-shearing coupling-based stress path triaxial apparatus. An axial force loading shaft is arranged at the upper part of a triaxial pressure chamber, and a torsion transmission shaft is arranged on a base of the lower part of the triaxial pressure chamber; a digital readout push-pull sensor and a displacement sensor are arranged on the axial force loading shaft; a torque sensor, a display instrument, an absolute type angular displacement sensor and an angular displacement display instrument are arranged simultaneously on the torque transmission shaft of the base at the lower part of the instrument; and by adopting the function of automatically supplying and discharging liquid in the pressure chamber, a confining pressure water supplying and discharging controller is used for feeding and discharging water to the interior of the pressure chamber. The invention not only provides a feasible testing apparatus for determining the strength characteristic of cylindrical soil samples under the conditions of tension, compression, torsion, shearing and combination thereof in the case of having no confining pressure or having confining pressure, but also obviously improves the testing reliability.

The invention relates to a material mechanics testing machine, belonging to the technical field of the material mechanics testing machine. The material mechanics testing machine is characterized in that the upper end and the lower end of the stander are provided with a lift motor and a torsion motor; the two motors form into one set of dynamic loading system and are controlled as well as coordinated to realize a tension torsion test and a pressure torsion test by an external electrical control system; a guide screw is arranged between the work table and an upper beam, wherein the upper end of the guide screw is fixed at the upper bean, and the lower end of the guide screw is driven by a synchronous belt wheel in a connection way; a middle beam is arranged between the work table and the upper beam; the middle beam is respectively provided with a tension compression rod and a tension compression sensor as well as a torsion sensor, wherein the tension compression sensor and the torsion sensor are communicated with a computer; the upper part of the wok table is provided with a slide way with a slide pillow; one side of the work table, near the vertical rod, is provided with a support seat; and the lower part of a torsion reduction machine is fixedly provided with a hanging rod, wherein the lower part of the hanging rod is provided with a clamp head. The two motors in the one set of dynamic loading system are simultaneously coordinated and controlled by the electrical control system to realize the functions of tension torsion and pressure torsion, and the rotate speeds of the two motors are adjusted by the electrical control system to meet the requirement of different experiments, digitally process the collection and the transmission of a parameter to be tested, and truly and exactly display the parameter on a screen.

A triaxial testing system of material properties having top and bottom joint assemblies that rotate about and move along a longitudinal axis in response to forces imparted by a testing machine. The joint assemblies are connected together by horizontal and vertical linkage assemblies. The horizontal and vertical linkage assemblies are connected to horizontal and vertical loading and clamping assemblies to thereby transfer in-plane and multi-axial loads from the testing machine and the joint assemblies to a material test specimen. The test specimen is rigidly clamped to the horizontal and vertical clamping assemblies. The bases and ends of the test specimen are shaped for clamping and axial loading. Rigid plates may be disposed over ends of composite test specimens for spatially stabilizing such specimens during testing. The test specimens may include devices to measure and record the axial and shear loads, displacement and strains imparted to the specimens during testing.

The invention relates to a location loading material testing machine which belongs to the technical field of material test. The location loading material testing machine is characterized in a location loading system; a support stand and a loading support part of the location loading system are respectively positioned at both ends of a fixing base; the loading support part comprises a location loading stand, a flange shaft, an overrunning clutch, a rolling bearing, a groove-shaped nut and two sliding blocks; three guide grooves are arranged on the location loading stand; the sliding blocks are respectively positioned in two keyways of the right external diameter of the groove-shaped nut; the overrunning clutch and the rolling bearing are fixed in the location loading stand in parallel; one end of the flange shaft is fixed by a hexagon nut through threads, and the other end is connected with the groove-shaped nut by threads; the left side of the groove-shaped nut is provided with a groove-shaped cavity; two through holes which are distributed left and right are radially arranged in the groove-shaped cavity; and the positions of the two through holes correspond to the first guide groove and the second guide groove on a loading support stand. The invention can realize a series of tension and compression tests and torsion tests by applying the guide grooves in the horizontal direction and the vertical direction of a location tension-compression-torsion loading stand.

The invention discloses a method for determining the elastic modulus and flexural rigidity of a reinforced concrete beam with a crack, relating to a tension Young's elastic modulus of a reinforced concrete beam with a crack in working, a measuring method of the tension Young's elastic modulus and a determining method of the flexural rigidity. A reinforced concrete beam with a rectangular cross section is manufactured as a test piece to be detected, and the length, width and height of the reinforced concrete beam are shown in the specification; the two ends of the test piece are supported by hinged supports; loads are intensively and symmetrically applied on the positions some distance away from at two points of the supports; the deflection value of the middle part of the test piece span and the strain value of the lowest end of the middle part of the test piece span are detected; a sum computed expression is deduced according to the analytic solution which is given by at theory of different tension-compression modulus under the condition that loading is performed on two points of a simple beam with a rectangular section intensively and symmetrically; and the sum can be accurately calculated by the load value, the defection value and the strain value. The sum determined by the invention contains a crack factor of the reinforced concrete beam within the given load range, and can be used for structural mechanic accurate analysis.

The invention relates to a comprehensive measuring device of static and dynamic rigidity of a ball screw. The comprehensive measuring device comprises a base plate, a linear feeding mechanism, a torque static and dynamic rigidity measuring mechanism, an axial static and dynamic rigidity measuring mechanism and a transverse static and dynamic rigidity measuring mechanism. The linear feeding mechanism comprises a servo motor, a torque sensor, a ball screw and a lead screw nut base. The torque static and dynamic rigidity measuring mechanism comprises two angle plates, two flanges, two circular gratings and two circular grating reading heads. The axial static and dynamic rigidity measuring mechanism comprises an electric cylinder, two connecting plates, two guiding rods, two springs and two tension-compression sensors. The transverse static and dynamic rigidity measuring mechanism comprises a linear guide rail, a sliding block, an electric cylinder, two pressure sensors, two universal balls, a first cardan, a connecting sleeve, a linear bearing, a sliding rod, an elastic box and a linear measuring block. The comprehensive measuring device can be used for torsional, axial and transverse static and dynamic rigidity measuring of the ball screw.

The invention discloses a hydraulic fatigue test system of a connecting rod. The system mainly consists of a test bench and a control system, wherein the test bench comprises a pump station mechanism, a hydraulic loading mechanism, a test bench body and a clamping and bearing mechanism; the pump station mechanism, the hydraulic loading mechanism and the clamping and bearing mechanism are all fixed on the test bench body; the hydraulic loading mechanism is connected with the pump station mechanism; and the clamping and bearing mechanism is connected with the hydraulic loading mechanism. In the test system disclosed by the invention, as the tension-compression loading for the connecting rod is asymmetric loading, the system realizes any duty ratio, can simulate multiple working conditions to load and thus can be widely applied to the fatigue test of the connecting rod in a large range.

The invention relates to a tension-compression and fatigue loading testing machine based on a laser confocal microscope, and in particular provides a loading testing machine applicable to a laser confocal microscope platform. The testing machine comprises a fixed base plate, a tension-compression loading device driven by a motor, a fatigue loading device driven by a piezoelectric ceramic, a force sensor, a holding device, a phase-shifting device and the like. The testing machine can perform tension-compression and fatigue loading tests on a typical sample and a film of a metal or non-metal material under macroscopic scale uniaxial stress, and designs the phase-shifting device for an optical testing method for improving the test accuracy and the automation degree. The testing machine has a compact structure, and a test piece is abutted on the lower bottom surface of the testing machine so that the loading under the laser confocal microscope platform can be achieved; besides, the testing machine uses the microscope to collect loading images, and process the images by an optical method to obtain mechanical parameters of a test piece material. The testing machine has the advantages of high system measurement sensitivity, reliable result and wide application range.

The invention discloses a measurement system for thin-film material tension-compression fatigue dynamic loading. The measurement system comprises a dynamic loading device, wherein the dynamic loading device is placed on a three-dimensional precision translation stage below an optical microscope, and a CCD (Charge-Coupled Device) camera is installed at the upper end of an eyepiece of the optical microscope. According to the measurement system, a dual-system tensile device consisting of a stepping motor and piezoelectric ceramic can be used for realizing the integration of large displacement and high precision, and can be used for directly carrying out static and dynamic loading of a thin-film material and observing the surface morphology changes of the thin film in real time in the loading process so as to realize the non-contact local strain measurement. The measurement system is compact in structure and convenient to use.

The invention provides a tension-compression elastic support which comprises a support top plate, an outer casing, an inner casing, an annular baffle, a steel core pillar, a spring partition plate, a steel sliding plate, a wear-resistant plate, a support bottom plate, an upper layer disk spring set and a lower layer disk spring set. The specification and the quantity of disk springs selected in the support are controlled, so that the elastic stiffness required by a structural design is provided, and the bearing capacity and deformation requirements of the support can be balanced; the tension-compression elastic support can be widely applied to the field of engineering design; the design problem that can be solved by large-scale design alteration before can be solved at very small cost; the structural design is more flexible; the stress is more reasonable; and the construction cost of engineering is lowered.

The invention discloses a reinforced concrete shell fire resistance testing system. The system comprises a test furnace, a loading device and a control and data acquisition device; one or more tension-compression sensors (3.1.2) electrically connected to the strain acquisition circuit of the control and data acquisition device are distributed on bottom of a loading beam (2.3); each tension-compression sensor (3.1.2) is connected with a jack (2.4); each jack (2.4) is fixedly connected with a force transfer rod (2.5) which extends into the reinforced concrete shell (4). According to the reinforced concrete shell fire resistance testing system, the jacks are adopted for performing vertical loading so as to simulate the structural stress in the reality; the fire behaviors of the reinforced concrete shell and the influence rule of vertical uniform distribution or integrated tension-compression load effect on the fire resistance of the reinforced concrete shell can be deeply studied, and then the fire resisting design of the reinforced concrete shell can be guided according to the test data and the fire resistance of the reinforced concrete shell can be improved.

The invention relates to an in situ nanomechanical test and discloses a trans-scale micro-nano scale in situ tension compression mechanical property test platform which can be provided for an in situ tension / compression test and synchronous detection and synthesis of load / displacement signals. The platform is characterized in that: the platform comprises an accurate drive unit, a signal detection and control unit, three freedom degree manual adjustment unit, a clamp and a support unit. A direct current servomotor of the accurate drive unit is connected with a two-stage turbine worm mechanism through a coupling. The signal detection and control unit comprises a displacement sensor, a force transducer and an encoder forming a fixed connection with the current servomotor. The three freedom degree manual adjustment unit comprises a Y-direction manual adjustment knob connected with a lower layer main body base of a X-Y manual platform, a X-direction manual adjustment knob connected with an upper layer main body base of the X-Y manual platform and a Z-direction manual adjustment screw connected with a Z-direction adjustment lower wedge-shaped block, wherein the Z-direction adjustment lower wedge-shaped block forms a sliding match with a Z-direction adjustment upper wedge-shaped block.

A testing machine includes a stand and a test device. The stand includes a base, box frame, a slide device driven to slide by a motor, and a control system controls the force applied on the test specimen. The test device is coupled at the slide device for performing various hardness tests consisting of Rockwell hardness test, Vickers hardness test, Brinell hardness test, micro-hardness test, and tension-compression test. The test device includes a force sensor and a data processing circuit converting an analog signal of the force sensor into digital data to interface with the control system.

The invention discloses an all-in-one machine for testing soil engineering tension-compression strength. The all-in-one machine comprises a control console, wherein a driving wheel and a control device are arranged at one side of the control console; fixed rods are mounted at the two sides of the upper end face of the control console in a mirror image manner; a positioning rod is arranged between the upper ends of the fixed rods; the positioning rod and the fixed rods are rotatably connected and fixed by bolts; a locking nut is arranged in the middle of the positioning rod; a screw hole of the locking nut is internally provided with a screw rod which is rotatably connected and matched with the screw hole; the lower end of the screw rod penetrates through the positioning rod to be connected with an S-shaped tension-compression stress sensor; an upper universal footstock is mounted at the bottom of the S-shaped tension-compression stress sensor; a displacement measurement platform is arranged on the upper end face of the control console. The all-in-one machine can be used for researching the influences of speeds on tensile and compressive strength of a soil body; in a direct tensile test, the deformation amount of the soil body can be accurately determined; meanwhile, a gravity sensor can be used for measuring the change of gravity in a testing process; the all-in-one machine can be used for acquiring data which are rapidly changed in the test and cannot be observed by naked eyes.

The invention relates to a concrete lever type tension-compression creep device provided with a static pulley. The concrete lever type tension-compression creep device consists of a support device, a loading device and a test piece connecting device; the concrete lever type tension-compression creep device adopts a double-level mechanism to realize tension and compression. The concrete lever type tension-compression creep device has the beneficial technical effects that the device is simple and reliable in structure, is capable of applying a continuous and constant load onto a test piece, and is small in floor space; and two test functions including a tension test and a compression test can be provided by a set of device.

The invention discloses a drop-hammer impact tension-compression integrated load test conversion device, and belongs to the technical field of test equipment. The device mainly comprises a drop-hammer test loader, a tension-compression integrated loading mechanism and a base, wherein the tension-compression integrated loading mechanism comprises an impact platform, a connecting guide rod, a fixed platform and a sliding platform. A compression loading mechanism and a tension loading mechanism are connected integrally to form the conversion device through the connecting guide rod, and drop-hammer impact load can be converted into compression or tension load; the test device is simple in structure construction and processing and manufacturing and convenient to assemble and mount, and compression and tension load requirements can be met simultaneously; compression tests, tension tests and shearing tests of engineering structure materials can be realized by adjusting local devices in pressed and tensile test areas, and dynamic mechanical property during impact load of actual engineering structure material can be simulated and tested.

The invention discloses a planetary roller screw pair friction torque measurement device. Friction torque measurement is realized by a base plate, a jack and a tension-compression sensor together. A planetary roller screw pair is loaded by a spring. The tilt angle of the base plate is adjusted by the jack to realize friction torque measurement. A support base is disposed on a guide rail, and slides front and back along the guide rail. The tension-compression sensor is installed between a nut and the support base, one end of the tension-compression sensor is connected with the support base, the other end is connected with the nut, and the tension-compression sensor is used to measure and calculate the comprehensive friction. When a screw rotates, the screw drives the nut to do linear motion, and the tension-compression sensor is connected with the nut and limits the rotation of the nut, and measures the size of friction. The spring is embedded into a retainer cup, and a thrust ball bearing is installed between the retainer cup and the nut, which can avoid the situation in which the spring and the nut directly contact each other to generate fiction to affect the final measurement result. The measurement device is simple in structure, highly universal, and safe and reliable.

The invention relates to a double-station and multispeed indicator of a vehicle damper. The double-station and multispeed indicator of the vehicle damper is characterized in that two stations are disposed side by side on the same test bed, wherein each station comprises a variable frequency motor; the output end of the variable frequency motor is connected to a crank connecting rod mechanism by a variable-speed motor and a clutch; the upper end of the crank connecting rod mechanism is connected to a clamp seat; the clamp seat comprises two slide bars and a pressing cover clamping frame and a damper clamping frame supported between the two slide bars; the bottom end of the clamp seat is provided with a pushing oil cylinder for pushing the damper; the rod part of the damper is connected to a tension-compression sensor which is disposed on a lifting cross beam in a hanging manner; the lifting cross beam is controlled by a lifting oil cylinder. A crank sensor is connected to the crank connecting rod mechanism. The indicator can vary a plurality of excitation velocities by a measurement and control system, and can be provided with a pressing cover, so that the damper rod is not pulled away when the damper is in an experiment, thereby precisely detecting the damping property of the damper in front of a close cover.

The invention discloses a tension-compression coupled yielding energy-absorbing grouting anchor rod for large deformation of a surrounding rock and a working method thereof. The tension-compression coupled yielding energy-absorbing grouting anchor rod comprise a hollow grouting anchor rod, an anchor rod locking device, a plurality of yielding grouting devices and an energy-absorbing anchor head, wherein a protection sleeve is arranged on a rod body of the hollow grouting anchor rod, a plurality of first grouting holes are formed in the rod body, and the first grouting holes penetrate through the protection sleeve and are communicated with a drilling hole; the multiple yielding grouting devices sleeve the rod body of the hollow grouting anchor rod at intervals, the surfaces of the yieldinggrouting devices are provided with second grouting holes, the energy-absorbing anchor head is fixed to the end of the hollow grouting anchor rod, and the anchor rod locking device is arranged at the free end of the hollow grouting anchor rod. By means of the yielding grouting devices, the real-time reinforcement support at the initial stage of deformation of the surrounding rock is achieved, the step-by-step automatic yielding effect is also played, the large supporting resistance is provided for the anchor rod body through the energy-absorbing anchor head, and the technical problems of anchorrod failure and insufficient grouting caused by high stress and large deformation of the surrounding rock are solved.

The invention provides a method for preparing a bionic human bone biomaterial. The method comprises the steps of utilizing a direct laser selective sintering technique to prepare a human bone bionic micropore bracket, injecting a material with the function of inducing bone growth into the bionic micropore bracket, drying and curing the obtained product and obtaining the bionic human bone biomaterial. The method combines the advantages of metal biomaterials and non-metal biological ceramic materials (hydroxyapatite), and utilizes the direct laser selective sintering technique, a vacuum impregnation technique and the like to prepare a novel bionic human bone biological composite material. The material has the advantages of biomechanical properties similar to natural bones, good biocompatibility, capability of realizing the synostosis of implanted bones and human tissue after the material is implanted into human bodies, safety and reliability. The bionic human bone biomaterial prepared by the preparation method has ultimate tensile strength more than 300 MPa, elongation between 10 and 12 percent, tension-compression elastic modulus less than 50 GPa and good biocompatibility.

The invention provides a differential pressure transmission multi-diameter split Hopkinson tension-compression integrated bar. The bar comprises a transmission system, a compression bar system, a tension bar system, an absorbing bar, a hydraulic buffer, an optical guide rail, a precise fine tuning strut member and a reshaper, wherein the transmission system, the hydraulic buffer and the precise fine tuning strut member are arranged on the optical guide rail; the compression bar system, the tension bar system and the absorbing bar are arranged on the precise fine tuning strut member; in the compression bar system, the transmission system is arranged on one side of the optical guide rail, an incident compression bar, a transmission compression bar, the absorbing bar and the hydraulic buffer are arranged along the axle center of a gun tube of the transmission system; in the tension bar system, the hydraulic buffer is directly arranged in front of the nozzle of the transmission gun tube; and one side of the optical guide rail is provided with the hydraulic buffer firstly, and then is provided with the transmission system, a tension bar, an incident tension bar and a transmission compression bar in sequence. The Hopkinson tension-compression integrated bar integrates prismatic members with different diameters, namely the prior Hopkinson compression bars and tension bars, onto a set of experiment devices, reduces the cost for purchasing experiment equipment, and has simple installation.

The invention discloses a tension-compression and torsion vibration fatigue test device capable of simultaneously accomplishing tension-compression and torsion fatigue tests. The test device comprises a test device rack, a torsion test mechanism and a plurality of tension-compression test mechanisms. In each tension-compression test mechanism, a tension-compression actuating cylinder piston rod, a force sensor, a guide rod, an adjusting rod and a tested workpiece are sequentially connected end to end, wherein the adjusting rod is provided with a plurality of adjusting positions; according to the size of the tested workpiece, the guide rod is connected to the corresponding adjusting position of the adjusting rod; the guide rod does rectilinear movement under the limitation of a guide mechanism. In the torsion test mechanism, a rotating end of each bearing slewing mechanism is connected with the other end of the tested workpiece; oscillating rods of all the bearing slewing mechanisms are connected in series by a link mechanism, and the oscillating rod at one end is connected with the piston rod of a torsion actuating cylinder through a link mechanism. Tension-compression actuating cylinders, the bearing slewing mechanisms and the torsion actuating cylinder are all fixed on the test device rack.

A vibration isolation device designed to be positioned between a structure (10) and an equipment anchor plate (11), includes a lattice made of bars, with each bar including at least one axial actuator (25), the lattice being an active hexapod including six identical isolation bars (12) positioned according to a regular geometry, the six bars (12) being arranged such that the control of the tension-compression forces in each of the six bars (12) makes possible the force and torque control of six separate degrees of freedom at the interface between the structure and the equipment, so as to produce effective isolation along all the system's degrees of freedom. At least one end-fitting of each bar consists of an element (16) made of elastomeric material (called “elastomeric element”).

A testing machine includes a stand and a test device. The stand includes a base, box frame, a slide device driven to slide by a motor, and a control system controls the force applied on the test specimen. The test device is coupled at the slide device for performing various hardness tests consisting of Rockwell hardness test, Vickers hardness test, Brinell hardness test, micro-hardness test, and tension-compression test. The test device includes a force sensor and a data processing circuit converting an analog signal of the force sensor into digital data to interface with the control system.

The invention discloses an accelerating and loading device for an indoor test of road surface materials. The accelerating and loading device comprises a thermostat, an operating desk, a tire, a motor, a transmission belt, a revolution indicator, a water pump, a water tank, a sprinkler head, a temperature sensor, a circulating air inlet, a circulating air outlet, a noise detector, a hydraulic device, a test specimen fastening module, a tension-compression type sensor, a self-lifting type testing wheel, a support wheel, a laser constructor and a computer, wherein the thermostat is positioned at the left side of a test device, the operating desk is positioned at the right lower side of the outer wall of the test device, the tire is positioned at the upper side of the thermostat, and the operating desk comprises a master switch, a rapid stop key, an accelerating operating desk, a loading operating desk, a temperature-control operating desk, a noise display, a water pump switch, a water pump operating knob and a motor switch. The accelerating and loading device for the indoor test of road surface materials is simple, applicable and reliable in operation, and can accurately simulate and detect the noise conditions, the anti-slide properties of test specimens and the mass loss rates of the test specimens of different road surface materials in environments of different temperatures, under different slippery degrees and under different loading effects.

The invention discloses a vertical elastic tension compression support. The vertical elastic tension compression support comprises pressure plates, a sliding plate, an abrasion-resistant plate, a steel basin, a tension damper, an intermediate steel lining plate, a compression damper, a top plate, a compression ring, upper anchoring devices and lower anchoring devices, wherein the upper anchoring devices are fixed at the corners of the upper end face of the top plate; the lower anchoring devices are fixed at the corners of the bottom surface of the sliding plate; the steel basin is arranged above the sliding plate; and the compression ring is fixed at the top of the steel basin. The vertical elastic tension compression support is characterized in that: the pressure plates are fixed at two sides of the sliding plate, the abrasion-resistant plate is arranged between the sliding plate and the steel basin, and elastic sealing rings are arranged at four sides of the abrasion-resistant plate; and the compression damper is arranged in the middle in the steel basin, the intermediate steel lining plate is fixed at the top of the compression damper, the tension damper is arranged between theintermediate steel lining plate and the compression ring, and the top of the intermediate steel lining plate passes through the compression ring and is fixedly connected with the top plate. By adopting the vertical elastic tension compression support, a bridge can move and is not in a suspended state at the support; meanwhile, in the vertical displacement process, the rigidity coefficient of the support meets the design requirement; and after the support vertically reaches the predetermined displacement, the support is limited by a limiting device.