METHOD FOR DETERMINING TRIBOTECHNICAL PROPERTIES OF FLEXIBLE MATERIALS AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2025 - IPC G01N19/02 

FIELD: measuring; testing.

SUBSTANCE: invention relates to testing of materials and to testing equipment, in particular to methods and devices for determining coefficient of friction of flexible materials. Method and device are disclosed. In the method, friction is created between two elements located one above the other, the lower element is brought into rotation by a valve motor, and the upper element is pressed against the lower element, the upper element is made with the possibility of its temperature control and with the possibility of fixing the test specimen cut from the flexible material, electric power consumed by the valve motor for rotation of the lower element without interfacing with the test sample is pre-determined, using the developed software, the test conditions are set and corrected, at given conditions, measuring the voltage and current consumed by the rectifier motor, the temperature in the contact zone of the friction pair, voltage from the strain gauge, and the friction coefficient of the test sample is calculated based on the results of said measurements using the developed program, as the difference in values of the electric power of the valve motor for rotation of the lower element interfaced with the test sample and without conjugation with the test sample. Device comprises a valve motor, on the shaft of which there is a lower element in the form of a disc equipped with a speed sensor, an upper element in the form of a positioner-fixture with a built-in adjustable heating element, equipped with an indenter with a strain gauge and a means of fastening the test specimen in the form of a tenon, unit for pressing the test sample to the lower element, configured to control the pressing force, a temperature sensor, a controller to which the valve motor, a heating element, a speed sensor are connected, temperature sensor, strain gauge, a developed low-level program is integrated into the controller, which generates control signals for setting and correcting test conditions, controller is connected to a personal computer in which the developed upper-level program is integrated.

EFFECT: high accuracy of measurements, shorter time for processing results, broader functional capabilities when determining the coefficient of friction of the surface of flexible materials taking into account physical factors of action on them.

8 cl, 1 dwg