648results about "Material strength using steady torsional forces" patented technology

The invention discloses a shield segment multi-dimensional mechanical property test platform, which comprises an outer frame, a vertical loading system, an annular external loading system, an inner frame, an annular internal loading system, a torsion loading system and a plurality of displacement sensors, and is characterized in that the inner frame and the outer frame are respectively arranged on the inner side and the outer side of a segment; the inner frame and the outer frame are connected through a connecting plate, the vertical loading system is arranged at the top of the outer frame, and the loading end of the vertical loading system telescopically abuts against the top of the outer side of the segment; the annular loading system is arranged on the outer frame, and a plurality of loading ends of the annular loading system are telescopically propped against the outer sides of the duct pieces respectively; the annular inner loading system is arranged between the inner side of the duct piece and the outer side of the inner frame; loading ends of the torsion loading system are respectively arranged on two sides of the duct piece; and the plurality of displacement sensors are sequentially arranged on the duct piece. According to the invention, through combination of different loading systems, the mechanical properties of the duct piece in a complex environment can be simulated.

The invention discloses a multi-linkage combined load synchronous application strength testing device. The technical problems that in the prior art, the load applying mode is single, and the combined load cannot be synchronously applied are solved. The device comprises a connecting mechanism and a load applying mechanism, wherein the load applying mechanism comprises a torsional load applying structure, a load transmitting structure and a multi-linkage testing structure. The load transmission structure comprises a special-shaped stress plate and a torsional load transmission assembly, and the torsional load transmission assembly comprises a connecting chuck and a torque plug-in. By controlling the rotation of the torsion load transmission assembly, a pure torsion load applying mode or a conversion mode of converting torsion motion into radial load can be selectively realized, and multi-directional load detection is realized. The invention further provides a combined load synchronous applying function, the single driving source synchronously activates the torsion load path and the radial load path by adjusting the geometric positions of the torque plug-in and the load adjusting plate on the connecting chuck, and synchronous applying of the torsion load and the radial load is achieved.

The invention relates to the technical field of metal fatigue life prediction, in particular to an additive manufacturing metal multi-axis high-cycle fatigue life prediction method based on defect characteristics. The method comprises the following steps: performing defect detection on a metal sample to obtain size parameters and position parameters of defects in the metal sample; determining the type of the defect in the metal sample and setting a first correction factor and a second correction factor; calculating the equivalent stress strength factor amplitude of the metal sample under multi-axial loading; acquiring a long crack propagation threshold value of the metal sample; normalizing the position parameters to obtain normalized position parameters; and establishing a fatigue life prediction model of the metal sample according to the normalized position parameters, the equivalent stress strength factor amplitude of the metal sample under multi-axial loading and the long crack propagation threshold value of the metal sample, and calculating the multi-axial high-cycle fatigue life of the metal sample. According to the method, the fatigue life of the metal material containing the additive manufacturing defects under multi-axis high-cycle fatigue loading can be accurately predicted.

The invention relates to an SEM (scanning electron microscope) and CT (computed tomography) compatible solid propellant mechanical property testing device and method, belongs to the technical field of precise scientific instruments and material micro-mechanical property testing, and solves the problems that in the prior art, due to the fact that imaging equipment is single, and image quality becomes poor due to creeping accumulation, micro-scale failure information of propellants is incomplete and inaccurate to obtain. In the mechanical property testing device, the in-situ mechanical testing device performs mechanical loading and load holding on the propellant sample, the SEM obtains the surface appearance of the propellant sample, the double-source double-probe industrial CT obtains the internal three-dimensional structure of the propellant sample, and the in-situ mechanical testing device is transmitted between the transfer cabin main cavity and the electron microscope cabin through the transfer channel. And the vacuum transfer cabin containing the in-situ mechanical testing device is transferred between the transfer channel and the scanning turntable of the double-source double-probe industrial CT by the mechanical arm. According to the invention, more comprehensive and accurate mesoscopic failure information of the propellant sample can be obtained while less time cost is paid.

The invention discloses a cable mechanical property testing device and method, and relates to the technical field of cable detection.The cable mechanical property testing device comprises a clamping mechanism, a tension applying mechanism, a torsion applying mechanism and a bending mechanism, the pulling force applying mechanism comprises two force applying moving frames and a pulling force driving assembly; the torsion applying mechanism comprises two torsion driving assemblies installed on the two swing seats correspondingly, and the two torsion driving assemblies are used for driving the two clamps to rotate correspondingly. The bending mechanism comprises a bending abutting assembly located between the two clamps and a bending driving assembly in transmission connection with the bending abutting assembly. The tensile property test, the distortion resistance test and the bending resistance test can be continuously completed through one-time clamping of the cable, different actual installation and use scenes of the cable can be simulated, and the accuracy of tensile property, distortion resistance and bending resistance test results of the cable is improved.

The present invention discloses a testing device for a rubber water stop joint, which relates to the technical field of rubber water stop joints; in order to improve the detection efficiency; specifically, it includes a base, a supporting part and a testing part for performing a pressure test on the main body of the water stop joint. The testing part includes: a bracket: which is fixed on the outer wall of the top of the base, and a piston cylinder is fixed on the outer wall of the top of the bracket, and a filling pipe and an adjusting pipe are respectively welded on the circumferential outer wall of the piston cylinder; a piston plate: which is movably connected to the inner wall of the circumferential wall of the piston cylinder. In the present invention, by providing a driving plate, the bending seat can be driven to rotate, so that the top of the main body of the water stop joint can be twisted by the rotation of the bending seat, so that the anti-twisting performance of the bending seat can be tested. At the same time, by using the first kidney-shaped hole, the circumferential movement of the driving plate can be converted into the linear movement of the ejector rod, and the ejector rod can be used to drive the piston plate to move downward, so as to test the pressure resistance performance of the main body of the water stop joint.

The utility model relates to the technical field of forklift fork frame strength detection, in particular to a forklift fork frame strength detection device which comprises a bottom plate and a fork frame, and the top of the bottom plate is fixedly provided with a door-shaped frame and a mounting seat; two testing mechanisms used for carrying out downward pressing, lateral pushing and torsional strength detection on the fork frame are symmetrically arranged in the door-shaped frame, and control mechanisms used for controlling the door-shaped frame to move longitudinally are arranged at the positions, corresponding to the two testing mechanisms, of the top of the door-shaped frame; by arranging the testing mechanism, the effects of simulating a vertical pressure test during cargo bearing, simulating a lateral force test during cargo roll or vehicle body turning and simulating a torsional load test caused by uneven ground or cargo gravity center shift during cargo insertion can be achieved; the performance of the fork frame under various actual working conditions can be comprehensively evaluated, and it is ensured that the fork frame can work safely and reliably in a complex working environment.

The invention provides a rotor blade torsional rigidity testing device, and the device comprises a blade fixing tool which is used for fixing a blade; the circular coding marks are adhered to the two ends of the measured section of the paddle; the loading tray is used for applying force to the paddle; the image acquisition system is arranged above the paddles, and the image acquisition system is used for acquiring images; meanwhile, the invention further provides a rotor blade torsional rigidity testing method, coding marks are pasted on the surfaces of the blades, three-dimensional plane information is fitted through the MPS industrial camera, the torsional rigidity of the blades is obtained through calculation, and the rotor blade torsional rigidity testing method has the advantages of being easy to install, high in precision and high in stability.

The invention particularly discloses a rock-soil body interface torsional shear characteristic and toughness parameter unit body test device which comprises a unit body sample blank manufacturing device, a centering device, a special drilling tool, a rib body and a torque load.The rock-soil body interface torsional shear characteristic and toughness parameter unit body test device has the beneficial effects that traditional direct shear / drawing shear is replaced with torsional shear loading; the problem that the interface contact area is reduced in the shearing process is thoroughly solved, it is ensured that the interface contact area of an anchor / pile and a rock-soil body is constant, a pressure water bag is arranged at the top of a test box unit body, the original overlying and confining pressure environment of a stratum is accurately simulated, a test anchor hole / pile hole is directly manufactured through a drilling technology, and the natural roughness characteristic of the hole wall is reserved to the maximum extent; the smooth wall surface limitation of traditional mold pore forming is broken through, the basic toughness concept of the anchor / pile-rock-soil body interface is defined for the first time, the nature of the basic toughness can be quantitatively represented by the robustness of the shear resistance of the interface, a matched toughness testing technology and evaluation method are developed, and a theoretical model and a calculation tool are provided for the toughness design of anchoring engineering and pile foundation engineering.

To provide more novel technical means for scientifically establishing the relationship between the evolution of a material organization structure under a complex load and the dynamic response of a macro performance.SOLUTION: The invention discloses a scanning electron microscope multi-technology combined mechanical property in-situ testing device and an analysis method, and belongs to the technical field of precise scientific instruments and material micro-mechanical property tests. A tension and compression loading unit conducts tension and compression loading on a sample 652, a displacement platform moves the sample to an SE mode position and a Raman mode position of a scanning electron microscope. A rotation loading unit drives the sample to rotate synchronously, and in-situ testing is carried out at different angles. The obtained multi-scale data in different time spaces are aligned into a load-displacement curve by using the least common multiple of time coordinates, space registration on multiple attitudes of the sample into a reference coordinate system from coordinate system rotation and translation is carried out, and a multi-source data fusion analysis function is constructed.SELECTED DRAWING: Figure 13

The invention relates to the technical field of screw and bolt performance testing, in particular to a screw and bolt torsion resistance detection device which comprises a workbench, a concave containing groove is formed in the workbench, and a clamping mechanism used for clamping a bolt workpiece is arranged in the containing groove; a guide seat is fixedly mounted on the workbench, a movable frame is slidably connected to the guide seat, an electric push rod is fixedly mounted on the guide seat, an annular pressure sensor is fixedly arranged at the top of the rear side of the movable frame, and a piston rod of the electric push rod slidably penetrates through the rear end of the movable frame and an inner ring of the annular pressure sensor. The top and the middle of a piston rod of the electric push rod are fixedly connected with limiting blocks correspondingly. According to the invention, the rotating ring is matched with the plurality of L-shaped plates, switching mechanisms of different types of bits are carried, and rapid and accurate automatic switching of the bits is realized in combination with the driving part, so that the detection requirements of bolt workpieces with different notch types are met, and the equipment universality and the detection efficiency are improved.

The invention provides a self-fed high-temperature unsaturated frozen soil interface shear test device and a method thereof, and relates to the technical field of civil engineering tests. The test device comprises a shell assembly, a torsion loading assembly, a gas phase imbedding assembly, a liquid phase imbedding assembly, a soil sample containing assembly and a self-feedback assembly, the torsion loading assembly comprises a torsion control box arranged on the inner side of a bottom box, and a torsion controller, a data acquisition master controller and a torsion device are arranged in the torsion control box; the output end of the torsion device is fixedly connected with a hollow cylinder through a torsion transmission shaft, and the hollow cylinder is detachably connected with a plurality of shearing plates. Through the arrangement of the gas phase imbedding assembly, the liquid phase imbedding assembly and the self-feedback assembly, the shearing characteristics of the unsaturated high-temperature frozen soil and the pile interface can be studied under the conditions of different matrix suction forces, different overlying loads and different freezing temperatures by utilizing self-regulation and feedback of the self-feedback assembly.

The invention discloses a strength detection tool and method for a composite cabin for an unmanned aerial vehicle. The detection tool comprises a cabin connecting plate, an end fixing device, a force application adjusting device and a deformation measuring structure. The force application adjusting device comprises a one-way stress application structure, a torsional stress application structure and a stress transmission structure. The stress transmission structure is provided with a special-shaped stress plate, a one-way stress transmission piece and a torsional stress transmission assembly. Particularly, a multi-linkage test structure is arranged, and conversion from torsional moment to radial one-way pressure is realized through geometric constraint and contact mechanics principles. According to the detection method, a step-by-step loading and multi-direction detection mode is adopted, initial detection, surface change detection and multi-direction comprehensive detection are achieved, and the preset deformation quantity is rapidly achieved through a displacement control mode by means of the qualified deformation quantity value detected last time. According to the invention, bending moment and torque load detection in four directions of 0 degree, 90 degrees, 180 degrees and 270 degrees can be completed through one-time clamping.

The invention relates to a tension-torsion combined load test device for a rotary connector, and relates to the technical field of crossing of mechanical engineering and material testing technologies, and the tension-torsion combined load test device comprises a working box, a shell, an automatic clamping assembly, a workpiece hoisting assembly, an axial load applying assembly and a torque applying assembly, the automatic clamping assembly and the torque applying assembly are arranged on the upper surface of the shell in a penetrating mode. A first forward and reverse motor drives a first gear and drives a second gear and a forward and reverse threaded column to rotate, so that two sets of U-shaped movable plates synchronously move in the same direction or in the opposite directions, after the first forward and reverse motor is started, the rotary motion is converted into rotation of the threaded column through gear transmission, and the U-shaped movable plates linearly move along limiting grooves under the action of threads; the clamp claw is driven to realize automatic clamping or loosening, manual operation is replaced, accurate and uniform clamping force is realized, loosening or deviation caused by human factors is avoided, and the reliability of test data is improved.

The utility model relates to the technical field of battery testing, in particular to a tensile and torsion-resistant testing tool assembly, which comprises a connecting piece, a tensile tool assembly and a torsion-resistant tool assembly. The connecting piece is welded to the pole, and the stress part of the connecting piece protrudes out of the first side face. The tensile tool assembly comprises a first supporting plate provided with a first avoiding notch, the connecting piece is located at the first avoiding notch so that the stress part and the pole can be located on the two sides of the first supporting plate in the first direction, the tensile equipment can pull the stress part in the first direction, the pole can be indirectly subjected to tensile force, and the tensile test of the pole can be conducted. The torsion-resistant tool assembly comprises a second supporting plate and a third supporting plate, when the thrust equipment pushes the stress part in the second direction, the second side face abuts against the second supporting plate, the third side face abuts against the third supporting plate, and the second direction is parallel to the side edge, intersecting with the end face, of the first side face. And when the thrust equipment pushes the stress part along the second direction, the post terminal is subjected to a force in a direction tangent to the side wall of the post terminal, so that the torsion resistance test of the post terminal is carried out.

The invention discloses a hydrogen storage cylinder safety detection device, and relates to the technical field of hydrogen storage, the hydrogen storage cylinder safety detection device comprises a detection box, the detection box is fixedly arranged, a gas cylinder body is arranged in the detection box, a sealing cover is hermetically assembled at an opening part of the detection box, a safety cylinder is fixed on one side of the detection box, and the detection box is hermetically communicated with the safety cylinder; at least two detection assemblies are slidably arranged on the periphery of the gas cylinder body, a driving assembly is arranged in the detection box, the driving assembly is provided with two output ends, a first transmission assembly is arranged at the first output end of the driving assembly and used for driving the two detection assemblies to move horizontally, and a second transmission assembly is arranged at the second output end of the driving assembly. A second transmission assembly is arranged at the second output end of the driving assembly and used for driving the two detection assemblies to move in the circumferential direction.

The invention relates to a sectional type positioning installation method and system for a steel structure frame, and relates to the technical field of building structure construction. The method comprises the steps that three-dimensional coordinate measurement is conducted on the embedded bolt through a total station, a deviation value recording table is obtained, and a control network and a marking system are established; the method comprises the following steps: performing ultrasonic flaw detection and pre-tension reinspection on a steel structural member, performing ground pre-assembly to obtain a single-section steel frame model, and performing optimization treatment to form a number marking system and an assembly sequence diagram; a steel structure is divided into a plurality of independent installation units, and preliminary positioning is achieved through a temporary fixing technology; secondary measurement is carried out, fine adjustment is carried out through an ejector and a wire drawing device, accumulated deviation is dispersed through an overall balance method, and the pre-camber is set to obtain a stable frame system; the high-strength bolts are finally tightened, and welding construction is conducted; the roof system is installed in a batched concentrated hoisting mode. The problem that accumulated errors are difficult to control in traditional steel structure installation is solved, and the installation precision and efficiency are improved.

The invention relates to an experimental device and method for testing the comprehensive mechanical property of a slender flexible cable, and belongs to the technical field of ocean engineering testing. The device comprises a main body frame, a tensile loading device, a bending load loading device and a torsional load loading device. The tensile loading device is not directly connected with the main body frame and is directly connected with the end part of the cable during an experiment. Through a modular integrated design, multi-axis coupling cooperative loading of stretching, bending and twisting is realized; a stretching actuator provides axial tension; the four-point bending actuator drives the slide rail and the roller to realize dynamic bending, and the bending radius is adjustable; the torsion actuator converts linear motion into torque through a gear-rack mechanism, and the supporting rollers eliminate axial interference. The device has the functions of pressure self-adaptive control and energy recovery. The device solves the problem that a traditional testing machine cannot simulate complex ocean working conditions, and is suitable for comprehensive mechanical property evaluation of flexible pipe cables such as submarine cables.

A method and apparatus for testing a specimen with pressure, applying a torque using one or more plates coupled to the test specimen, applying a bending moment, and / or applying an axial load, either separately or simultaneously, with or without rotating the specimen, and without the applied forces interfering with each other.

The utility model belongs to the field of welding strength detection, particularly relates to welding strength detection equipment for welding parts, and aims to solve the problems that force is applied in a manual mode in the existing detection process and the detection mode of the detection equipment is relatively single, and provides the following scheme that the welding strength detection equipment comprises a bottom plate, and a pushing assembly for pushing pairs is arranged at the top of the bottom plate; the top of the bottom plate is fixedly connected with two supporting plates, the tops of the two supporting plates are fixedly connected with a transverse plate, the top of the transverse plate is slidably connected with a second base plate and a first base plate, and the top of the second base plate is provided with a torsion detection assembly for torsion detection. Torsion force and pulling force generated by detection of a welding piece are provided by the air cylinder and the driving motor respectively, a large amount of manpower is saved, meanwhile, pushing of the air cylinder can drive related assemblies above the two sliding blocks to synchronously move towards the two sides, pushing force applied by the air cylinder in the pushing process can be well monitored, and data can be obtained more accurately.

The automobile part torsional fatigue test bench comprises a bench body, a driving mechanism is arranged at one end of the top surface of the bench body, a workpiece carrying structure is arranged at the other end of the top surface of the bench body, a force application structure is arranged at the position, close to the driving mechanism, of the top surface of the bench body, and the driving mechanism comprises a driving bin. The end, away from the force application structure, of the driving bin is fixedly connected with a servo motor, and the two sides of the middle of the interior of the driving bin are fixedly provided with a cycloidal-pin wheel speed reduction assembly and a planetary speed reduction assembly correspondingly. The driving mechanism is driven by the servo motor, a huge oil supply hydraulic system does not need to be used, the occupied area is small, the output torsion load can be switched through the cycloidal-pin wheel speed reduction assembly or the planetary speed reduction assembly, the load output through the planetary speed reduction assembly is low, constant loads can be repeatedly applied to a workpiece for a long time, and the working efficiency is improved. The output load of the cycloidal-pin wheel speed reduction assembly is high, destructive testing of the maximum load can be carried out, and two detection modes can be considered.

The utility model discloses a full-automatic spring plunger height and torsion detection device which comprises an automatic carrying mechanism, an automatic detection mechanism and a control system. The automatic detection mechanism comprises a lower die assembly, a pressure sensor and a servo lifting driving unit; a detection positioning groove with an opening in the upper end is formed in the lower die assembly; the control system comprises a PLC and a touch screen connected to the PLC, the PLC is further connected with a communication interface, and the touch screen is used for setting the torsion detection height so that the servo lifting driving unit can drive the pressure sensor to move downwards to the set torsion detection height; the automatic carrying mechanism comprises an automatic clamping jaw unit, and the automatic clamping jaw unit transfers the spring plungers into the detection positioning grooves and discharges the detected spring plungers to a corresponding qualified product area and a defective product area according to a qualified product area and a defective product area. Therefore, the height and the torsion of the spring plunger can be automatically detected on the same automatic detection mechanism, labor is saved, and the detection efficiency, the detection precision and the stability are effectively improved.

The invention relates to a wind power tower bending shear torsion test loading anti-interference decoupling switching integrated device, which comprises a reaction wall, a support, a reaction column, a reaction longitudinal beam, a reaction cross beam and four actuators, and is characterized in that the top end of a fixed tower on the support is connected with a loading beam through a switching device; the first actuator applies axial load to the tower drum through the loading beam and the switching device, the second actuator and the third actuator apply bending moment to the end of the tower drum through the loading beam and the switching device, the fourth actuator is matched with the connecting piece, the rectangular steel plate is connected with the switching device to apply horizontal shearing force and torque to the end of the tower drum, and application and decoupling of various types of loads are achieved. The test precision is ensured; the device can truly simulate the load condition of the tower drum section, can also be matched with the loading beam to transmit the axial force, the bending moment, the shearing force and the torque to the wind power tower drum, and effectively solves the influence of horizontal displacement and torsional deformation on loading in the horizontal and vertical load coupling loading process in the wind power tower drum composite load simulation test.

The invention relates to the technical field of fatigue detection, and discloses a microcomputer-controlled fatigue test device which comprises a workbench, a turntable and a limiting mechanism are installed on the workbench, the turntable is driven to rotate, the limiting mechanism is fixedly connected to the workbench and located in a hole in the center of the turntable, and a swing mechanism is installed on the turntable. The swing mechanism is installed at the eccentric position of the rotating disc, a first installation block capable of swinging is arranged on the swing mechanism, the first installation block extends to the position over the limiting mechanism, one end of a cable to be detected is installed on the first installation block, and the other end of the cable to be detected is installed on the limiting mechanism; through cooperation of the swing mechanism and the rotating disc, the cable is initially vertically arranged, and the swing mechanism and the rotating disc can drive the vertically arranged cable to carry out torsion test, bending test and bending and torsion superposition test, so that the detection of the cable can better fit the use environment of the cable; and the accuracy of data testing is improved.

The invention discloses an internal strain testing device for a rock hollow cylinder, and relates to the technical field of rock mass mechanical test equipment. The device comprises an internal strain testing device, the internal strain testing device is located in a sample, and the internal strain testing device comprises an LVDT shell, a conversion cone shell and a base shell; one end of each compression probe contacts with the inner wall of the sample, the other end of each compression probe radially penetrates through the conversion cone shell to contact with the lower end of the conversion cone, the contact position of each compression probe and the conversion cone is an inclined platform, and each compression probe is internally provided with a semi-compression spring. The internal strain testing device for converting the radial displacement in the rock into the vertical displacement is designed, and the measurement precision of the strain of the inner ring of the sample is high.

The invention relates to the technical field of fatigue testing, and discloses a blade fatigue testing device and method based on a vortex-induced vibration principle, the blade fatigue testing device based on the vortex-induced vibration principle comprises a test bench foundation and at least one excitation unit, the test bench foundation is suitable for fixing a blade root of a tested blade; the excitation unit comprises a blade cover body and a pneumatic loading module, the blade cover body is of an annular structure fixedly arranged on the periphery of a test blade in a sleeving mode, the pneumatic loading module is arranged below the blade cover body, and the pneumatic loading module comprises a frame and at least one air blowing piece installed on the frame; wherein the air blowing piece is configured to blow air to the blade cover body, and turbulent flow is formed at the blade cover body. Non-contact excitation is achieved through aerodynamic coupling, the additional mass influence caused by mechanical connection is avoided, and full-size fatigue verification of the blade is completed under the condition that the natural vibration characteristic is kept.

The utility model discloses a cable torsion resistance test device, which comprises a worm and gear reducer, a dynamic torque sensor, a torsion transmission shaft, a bearing seat, a cable fixing clamp, a screw rod sliding table, a linear guide rail sliding group, a counterweight and a servo motor, the servo motor is connected with the worm and gear speed reducer; the output end of the worm and gear speed reducer is connected with a dynamic torque sensor; one side of the dynamic torque sensor is connected with a torsion shaft; the torsion shaft is supported by a bearing seat; one side of the torsion shaft is connected with one end; the two ends of the cable are fixed through cable fixing clamps. The cable fixing clamp located on one side of the torsion shaft fixes the connecting end of the cable and the torsion shaft. The cable fixing clamp on the other side is arranged on the screw rod sliding table; the lead screw sliding table is installed on the linear guide rail sliding set. The other end of the cable is connected with the counterweight through a connecting piece. The device has the advantages of simple structure, low cost and the like, and the torsion resistance of different cables can be confirmed by comparing and measuring the measurement results of the different cables under the same test condition.

The invention belongs to the technical field of quality detection of reinforcing steel bar connecting parts, and particularly relates to a quality detection device for a bridge reinforcing steel bar connecting part, which comprises a machine table, a fixed seat I and a fixed seat II are arranged on the machine table, a lifting frame is mounted outside the fixed seat II, and a fixed table is rotatably arranged outside the fixed seat I; the fixing table and the machine table are fixedly installed, a motor is in transmission connection with the center of the bottom of the first fixing base, fixing grooves are formed in the first fixing base and the second fixing base, clamping blocks are arranged on the two sides of each fixing groove, and a steel bar connected and fixed through a sleeve is placed between the first fixing base and the second fixing base. A vertically-lifting lifting rod is arranged on the inner wall, away from the steel bar, of the fixing groove, and the end, facing the steel bar, of the lifting rod is connected with a probe. The device can selectively or simultaneously perform drawing or torsion force application on the reinforcing steel bar, so that the detection applicability is improved, and the stress change of each position is monitored through the strain gauges distributed outside the sleeve.

The invention relates to the technical field of stress loading tests of engineering structural members, in particular to a composite torsional loading test device. In order to solve the problem that a connecting line of rotation centers of a servo actuator and a two-force rod relative to a loading beam in a traditional composite torsional loading test device is not parallel to the length arrangement direction of the loading beam, a novel composite torsional loading test device is provided. Comprising a loading beam, a servo actuator, a two-force rod, a reaction wall, an axial jack, a reaction assembly and a base, a front vertical rotating shaft and a rear vertical rotating shaft are fixed in the loading beam, the axis connecting line of the front vertical rotating shaft and the rear vertical rotating shaft is parallel to the length arrangement direction of the loading beam, and the front vertical rotating shaft and the rear vertical rotating shaft are rotationally sleeved with a front sleeve and a rear sleeve respectively. The right end of the servo actuator and the right end of the two-force rod are fixed to the rear sleeve and the front sleeve respectively. According to the device, the data processing difficulty is simplified, and the test accuracy is improved.

The present invention belongs to the technical field of cable tension testing, and specifically discloses a cable tension testing device and method for cable processing, including a cable tension testing machine, a lateral tension component is provided at the rear side of the cable tension testing machine, two groups of shielding components are provided at the front side of the lateral tension component, and the lateral tension component includes a mounting frame fixedly installed at the rear side of the cable tension testing machine, an electric slide is fixedly installed at the front end of the mounting frame, a platform is provided on the electric slide, four groups of fixed sleeves are fixedly installed at the front end of the platform, movable plates are slidably provided on the inner sides of the four groups of fixed sleeves, and two groups of fixed rods are fixedly provided between the front ends of the four groups of movable plates, which are close to the opposite groups on both sides. The present invention simulates the dancing of the wire caused by wind force through the coordinated use of the whole, cooperates with the first motor to realize periodic torsion and stretching, and combines the stress scenarios to break through the limitations of traditional unidirectional tension testing.