Наукові статті
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Item type:Наукова стаття, Method of determination the initial elasticity modulus and timber deformation modulus under the influence of acid environment(2022) Homon, Sviatoslav; Vereshko, OlegThe technique of experimental researches of timber by axial compression along fibers by short-term loading for operation in various acid environments (hydrochloric, acetic and lactic acids) during displacements increase is developed. The results of researches of the initial elasticity modulus and the deformations modulus taking into account the factor of environment aggressiveness are given. It is found that the effect of acids on wood with different impregnation periods significantly reduces the initial elasticity modulus and deformation modulus and depends on the impregnation period.Item type:Наукова стаття, Theoretical analysis of the microrelief of typical machine-made surfaces by SEM photogrammetry(2024) Boyarska, Inna; Homon, Sviatoslav; Kulakovskyi, Leonid; Kulakovskyi, LeonidThe article analyzes digital elevation models (DEMs) of typical mechanically formed surfaces. The theoretical issues of 3D modeling of typical "ideal" surfaces obtained, for example, by artificially growing single crystals, forming regular microrelief of materials, etc. are considered. For this purpose, the most typical stepped, spherical, cylindrical, and cubic machined microrelief surfaces were selected. The algorithms for analytical photogrammetric and digital processing of SEM stereo images are presented and illustrated by relevant examples. The results of numerical integration for different surfaces are consistent with a typical "stepped" surface.