STUDY OF STRESSES IN MATERIALS WITH REGULAR MICROSTRUCTURE FOR THEIR APPLICATION IN THE DESIGN OF POLYGRAPHIC CUTTING MACHINES

MACHINE SCIENCE

Abstract

Modern polygraphic equipment is required to be designed with minimum weight and dimensional parameters. The optimal modes of their operations are also very important. These requirements can be met by using cellular materials with regular microstructure, which are manufactured using special technologies. To design the links of the mechanisms of polygraphic equipment from new materials, first it s necessary to study the strength properties of cellular materials. This exploration will show how the stress will be distributed in the microstructure of the material. It is also important to find the points in the unit cell of the microstructure, where stresses will get their maximum values. This paper presents the influence of the geometrical parameters of a unit cell on the stress distribution inside the material of a regular microstructure. Studies have been carried out by modeling the stress state of a unit cell using the numerical method. A numerical method is proposed for the estimation of the stress concentration factors (SCF) on the cell wall junctions of the cellular structure. The SCF was
defined by multiplying the nominal stress components applied to the sides of the unit cell to the stress components at the filleted cell wall junction. The use of materials with a cellular regular microstructure in the design of polygraphic equipment will save material resources. In addition, this will open up new opportunities to fill the cells of the microstructure with piezoactive materials, which are a source of high-frequency vibrations that improve the performance of machines.