The invention relates to a hydraulic test system for a repeated bend test. The system comprises a substrate, a supporting block, a clamping block, a loading block, a loading bolt, a guide rail, an oiltank, a hydraulic pump and a hydraulic cylinder; the supporting block is fixed to the substrate, the upper end face of the supporting block is used for placing a to-be-tested part, a baffle plate isarranged on the supporting block on the side of the to-be-tested part, the height of the baffle plate is smaller than the diameter of the to-be-detected part, and the lower end of the clamping block is right-angled; the guide rail is vertical to the substrate, the clamping block and the loading block are successively arranged on the guide rail in a sleeving mode, a loading bolt is arranged on thetop of the loading block, the loading bolt is screwed into the loading block, the end part of a hydraulic rod of the hydraulic cylinder leans against the loading bolt, and the hydraulic cylinder is used for applying an action force to the loading bolt.

Hydraulic test system for repeated bend test

The invention provides a computed tomography (CT)-based in-situ tension and compression device. The CT-based in-situ tension and compression device comprises a tension and compression loading module,an experiment cavity module, a control module, an outgoing line fixing module and a pedestal, wherein the tension and compression loading module, the experiment cavity module and the control module are arranged on the pedestal; the pedestal is arranged on a rotatable CT sample platform; the outgoing line fixing module is arranged on a non-rotatable part of the CT sample platform; the experiment cavity module is used for accommodating a test sample material; the tension and compression loading module is used for providing power for performing tension and compression on the test sample materialaccommodated in the experiment cavity module as well as rotation concentricity, and measuring experiment data; and the control module is used for transmitting an operation instruction to the tension and compression loading module, receiving the experiment data measured by the tension and compression loading module and processing the experiment data. By application of the device, the evolution process of the internal structure of the test sample material under the loading state.

Computed tomography (CT)-based in-situ tension and compression device

The invention discloses a torsion torque test device for a lambda-shaped rod. With the torsion torque test device for the lambda-shaped rod adopted, the torque and angle of a a superelastic lambda-shaped rod capable of being unfolded and locked through elastic strain energy storage which is realized through the elastic deformation of the superelastic lambda-shaped rod can be tested, and a theoretical experiment foundation is provided for the application of the superelastic lambda-shaped rod to engineering. According to the device, two ends of the lambda-shaped rod are fixed onto clamping endsat two ends of the device respectively; the clamping end at one end is connected with a guide rail, so that the clamping end can have a degree of freedom of movement when the lambda-shaped rod is twisted; the clamping end at the other end is connected with a gearbox, and power is inputted through the clamping end, so that the torsion torque and angle of the lambda-shaped rod can be measured through an angle sensor and a torque sensor; and the gearbox is meshed with a pair of bevel gears through two pairs of spur gears. According to the torsion torque test device for the lambda-shaped rod ofthe invention, the torsion torque performance experiment of lambda-shaped rods with different central angles and different bonding region widths can be realized by means of tightening devices at the clamping ends, and the accurate measurement of angles and torques in torsion experiments is achieved.

Torsion torque test device for lambda-shaped rod

The invention discloses a UV experimental device which comprises a sample table, a conveying belt and a UV emitter. The sample table is mounted on a conveying belt; the UV emitter is arranged above the sample table; the sample table comprises an objective table and a heating module; the objective table is disposed at the top of the heating module; the top of the objective table is provided with aplacing groove, and a coating piece to be tested is placed in the placing groove. The heating module includes a casing, a heating disc, a heat insulation chamber, fins and a first temperature sensor.The heat insulation chamber is disposed above the heating disc, the bottoms of the fins are connected with the heating disc, the upper ends of the plurality of fins are disposed around the objective table, and the first temperature sensor is mounted at the position of the edge of the placing groove. The experimental device is convenient to operate and has high experimental precision, not only cansimulate the temperature difference between the front side and back side of the coating piece, but also can flexibly change the angle of UV light irradiation, so that a coating durability test of various parameters is achieved, and powerful testing support is provided for the development of the coating technology.

UV experimental device capable of simulating front side and reverse side temperature difference of coating piece and working method thereof

The invention provides a uniaxial stretching device used with neutron scattering and an experimental method, which solve the problems in the prior art that strain rate and temperature cannot be controlled respectively, an independent displacement correction function is not provided, and sample installation and external field loading modes cannot be controlled for the characteristics of different materials. According to the technical solution, the uniaxial reciprocating stretching device used with neutron scattering comprises a servo motor, and further comprises a compilable motion controller,a mechanical deceleration mechanism, a bidirectional transmission mechanism, a laser displacement sensor, a tension sensor, a heating cavity, a bidirectional screw, a nut, a dowel bar, a fixture and the like. Strain rate and temperature cannot be controlled respectively; an independent displacement correction function is provided to effectively avoid the accumulative error of mechanical motion; the separated fixture and connecting mechanism are easy to replace during experiment, and can be debugged according to different sample characteristics; and two different stretching modes can also be switched.

Uniaxial stretching device used with neutron scattering and experimental method

The invention relates to a tensile fatigue-four-point flexural fatigue in-situ mechanical testing device which comprises a tensile-fatigue pre-load loading unit, a tensile fatigue loading unit, a four-point flexural fatigue pre-load loading unit and a four-point flexural fatigue loading unit, wherein the tensile fatigue loading unit is used for driving a first-stage worm and gear component to drive a bidirectional screw rod nut pair to achieve quasi-static loading through a motor; a flexible chain is driven by piezoelectric ceramic to achieve medium-low frequency reciprocation movement of a test part in an axial tensile direction; the four-point flexural fatigue loading unit is used for driving a worm and gear to drive a one-way screw rod nut pair to achieve four-point flexural pressure head loading through another motor, four-point flexural pressure head loading is achieved with the combination of piezoelectric stack and a flexible hinge mechanism, and under a certain flexural load, a pressure head is driven through piezoelectric stack to output micro alternating displacement, and thus low-frequency fatigue loading under a flexural load. The tensile fatigue-four-point flexural fatigue in-situ mechanical testing device is compact in structure and reliable in principle, and in-situ testing on micro deformation, damage and cracking process of a material under flexural fatigue and four-point flexural fatigue stress can be implemented under observation of various imaging instruments.

Tensile fatigue-four-point flexural fatigue in-situ mechanical testing device and testing method thereof

The invention discloses an in-situ torsion testing platform and an observation system thereof, and belongs to the field of precise scientific instruments The in-situ torsion testing platform comprises a supporting unit, a torque loading unit, a clamping unit, a temperature loading unit and a detecting unit, wherein the supporting unit comprises a base; the torque loading unit is arranged on the base and drives a tested sample to rotate through the clamping unit; the clamping unit comprises a first clamp body and a second clamp body which are oppositely arranged, and the first clamp body and the second clamp body are respectively used for clamping two ends of the tested sample; the temperature loading unit comprises a heating table, the heating table is positioned between the first clamp body and the second clamp body, and a groove used for containing the tested sample is formed in the heating table; the detecting unit comprises a first detector and a second detector, the first detector is used for measuring an output torque angle of the torque loading unit, and the second detector is used for detecting the torque of the twisted tested sample According to the in-situ torsion testing platform disclosed by the invention, in-situ detection can be carried out on mechanical property, microstructure structural variation, deformation damage mechanism and the like during a torsion load process of the tested sample under the action of a thermal field

In-situ torsion testing platform and observation system thereof

The invention provides a heating device and a heating monitoring device and belongs to the technical field of material test. The heating monitoring device comprises the heating device and a temperature monitoring device, wherein the heating device comprises a heating element, a heat conduction plate, a box body and a cover body matched with the box body and is used for heating a tested sample used for in-situ tensile test; both the heating element and the heat conduction plate are arranged in the box body; the tested sample is clamped between the box body and the cover body; the box body is provided with a first chamber and a second chamber, the first chamber and the second chamber are respectively positioned in the two sides opposite to the heat conduction plate; the heating element is positioned in the first chamber. The heating element and the tested sample are separated in two different spaces through the heat conduction plate; the tested sample is heated by adopting a non-contact radiation mode, so that the test safety of the tested sample in the heating process is ensured. The temperature monitoring device enables the surface temperature of the tested sample in the heating process to be in a constant temperature state in which the normal tensile test can be performed.

Heating device and heating monitoring devices

The utility model relates to a mechanical properties tests technical field, the utility model provides a flexural fatigue test instrument and test system. Flexural fatigue test instrument includes base, testing arrangement, clamping device, a drive assembly, and clamping device, testing arrangement, a drive assembly are fixed in the base respectively, testing arrangement makes and is in step carried out reciprocating motion at first direction motion, the 2nd drive assembly drive detecting element and testing element at the first direction by test appearance including the 2nd drive assembly, detecting element, the testing element that connect gradually, drive assembly drive clamping device, makes drive assembly 0 tested kind with predetermined frequency and amplitude extrusion. The utility model provides a test system, this system includes data processor, sign instrument, flexural fatigue test instrument, real -time regulation and control test data has been realized, whole dynamic monitoring mechanical testing process to data processor, sign instrument and flexural fatigue test instrument cooperation work.

Flexural fatigue test instrument and test system

The utility model discloses a tensile tired tired normal position mechanical testing device of four -point bending, include: tensile tired pre -loading loading unit, tensile fatigue loading unit, four -point bending tired pre -loading loading unit and four -point bending fatigue loading unit. The utility model discloses the testing arrangement structure is small and exquisite, can develop above -mentioned test at multiple under a microscope, carries out the normal position monitoring to microdeformation, damage and the breaking -down process of material.

Wang Fenglan

Papers

Tensile fatigue-four-point flexural fatigue in-situ mechanical testing device and testing method thereof

In-situ torsion testing platform and observation system thereof

Heating device and heating monitoring devices

Flexural fatigue test instrument and test system

Tensile tired tired normal position mechanical testing device of four -point bending