STAND FOR TESTING FOR BIAXIAL TENSION-COMPRESSION Russian patent published in 2023 - IPC G01N3/08 G01N3/02 

FIELD: testing the mechanical properties of metallic materials.

SUBSTANCE: invention relates to a device for mechanical testing for biaxial tension-compression. The stand comprises a cruciform base, on which a biaxial loading device is installed, comprising four power units located on mutually perpendicular axes, each of which is connected to one of the four grips of the sample, and four tension-compression force sensors. On a cruciform base made of aluminium alloy, four plates are fixed with rods made of austenitic steel located vertically on the base made of aluminium alloy and having through holes in the centre, four power units, consisting of a motor, a gearbox and a lead screw passing through a through hole in the plate. Between the lead screws and grips made of austenitic steel and equipped with adapters with inserts and fingers made of austenitic steel, there are four load cells. The stand is additionally equipped with four linear displacement sensors located in a holder fixed on the base, and four length-adjustable stop rods with cutouts and four length-adjustable stop rods without cutouts passing through them, located between four plates, as well as a U-shaped electromagnet with a magnetizing winding connected to a controlled current source, and a measuring winding connected to a fluxmeter. The outputs of strain gauges, linear displacement sensors and fluxmeter, as well as the inputs of the motor controllers and the controlled current source are connected to the computer, and the sensor signals are processed automatically in accordance with the program embedded in the computer.

EFFECT: high accuracy and reliability of the testing results and expansion of functionality.

1 cl, 2 dwg