METHOD FOR TESTING A SAMPLE OF AN ALUMINUM-MAGNESIUM ALLOY WITH A VARIABLE STIFFNESS OF THE LOADING SYSTEM AND A DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2022 - IPC G01N3/08 

FIELD: strength properties study.

SUBSTANCE: invention relates to the study of the strength properties of solid materials by applying mechanical forces to them. A tensile force is created on the material sample and video recording of the working part of the sample is carried out. The load on the sample is transmitted through a tooling with adjustable stiffness in the range from 5 kN/mm to 120 kN/mm. Video recording is carried out by two video cameras, the axes of which are installed in a plane perpendicular to the axis of the sample. The optical axes of the cameras are directed to the working area of ​​the sample at an angle of 60 to 90 degrees between the axes of the cameras. For each value of the sample shooting fragment with a frequency from 0.1 Hz to 100 Hz, the distribution of deformations along the length of the working part of the sample from the tensile load in the range from 0 to 100 kN is built and the dependence of the load on the elongation of the sample is obtained from the sensors of the testing machine. The device contains a sample of an aluminum-magnesium alloy, installed in the grips of a testing machine that creates a tensile force, and a non-contact video recording system of the strain field in the working part of the sample. The load from the testing machine is transferred to the sample through a device of variable stiffness in the range from 5 kN/mm to 120 kN/mm. Video recording of the deformation field in the working part of the sample is carried out by two video cameras installed in a plane perpendicular to the axis of the sample. The optical axes of the cameras are directed to the working area of ​​the sample at an angle of 60 to 90 degrees between the axes of the cameras; the device contains two computers. One computer is connected through the controller with built-in load and displacement sensors, and the second computer is equipped with Vic-3D video system software and an analog-to-digital converter unit for synchronization with the controller and the first computer.

EFFECT: possibility of obtaining information about the properties of the sample with a variable stiffness of the loading system, including under conditions of the manifestation of intermittent deformation, to investigate the intermittent fluidity of the material, to investigate the properties of the material in experiments on quasi-static tension.

2 cl, 11 dwg, 1 tbl