Research of microdeformation and stress in details of agricultural machines by implementing holography

The article presents theoretical and experimental studies of microstrains and stresses in the details of agricultural machines by the implementation of holography. The expansion of computer holography, associated with the development of optical methods for studying the technical condition of agricultural machinery and their components, is accompanied by significant complications associated with the interpretation of interferograms. An important solution was to investigate the process and the associated appearance of microdeformation fields on the surface of the product without destroying it. In this case, the conditions of the allowable load and, accordingly, the allowable technical condition of the product were created, when the natural sample or the real part was not destroyed, and the hologram was recorded at the time of appearance and development of microdeformations. The hologram reproduced the kinetics of the process in a three-dimensional image, where all the elements of the study were in real time and real size, which made it possible to capture the three components of the microdeformation vector. Such experimental researches for establishment of admissible values of a technical condition were carried out according to the developed technique were carried out for the first time. The use of holography as a means of research allowed to obtain the values of microdeformation in three directions of the vector, as well as to mathematically describe the dependence of these deformations on the coordinates.