Abstract
Purpose of work: comprehensive study of raw materials. Methodology for performing the work: a combination of computer modeling and experimental research of the processes occurring with the particles of raw material at various stages of technological processing. Methods for calculating ISSN 2308-5312 Наукові праці ДонНТУ. Серія: «Машинобудування і машинознавство». No1(14)’2020 54 the deformation behavior of cylindrical and spherical particles under load with different elastic moduli and using Hertz's expressions and Hooke's law have been developed; creation and description of comparative diagrams of deformation behavior and displacement curves for cylindrical and spherical particles; studies of capillary and viscous forces during particle-particle and particle-wall interactions, when one of the objects has a liquid layer; investigation of the deformation behavior of particles upon impact on a dry surface and a surface with a thin layer of liquid; measuring the dynamic angle of contact between the liquid bridge and the particle; determination of density and structural characteristics of discrete materials; shear tests of bulk materials under various normal loads; studies of residual (transient) flow at various loads of powder materials; compression tests of materials; compaction of bulk materials (tableting) uniaxial compression tests. Scientific novelty: we developed and investigated a mathematical model of deformation and behavior of particles under load; the process of impact of a spherical particle on a dry surface and a surface with a layer of liquid. The relationship between the shape of particles and their ability to resist external influences is revealed. A regularity has been established that shows how the presence of a liquid layer on the surface of particles significantly affects the interaction between particles. The expediency of combining modeling and experimental research in the study of bulk materials is given. Practical value: the methods of modeling and experimental study of the behavior of material particles under various external influences given in the article are advisable to use in the design and modernization of such equipment as granulators, bins, dispensers, briquetting and tableting presses, pneumatic conveying elements, and the like. The article presents the results of particle behavior studies conducted in the laboratories of the Technical University in the city of Kaiserslautern, Germany, under the DAAD international scientific cooperation program.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Scientific Papers оf DonNTU: Mechanical Engineering and Machine Science
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
