20.500.12556/RUL-105549 Apparatus for measuring friction inside granular materials granular friction analyzer Flow of granular materials is a complex process but it is important to measure, because the flow of granular material during processing, handling and transportation strongly influences the quality of the final product and its cost. Flowability of granular materials depends on the characteristics of the material and on the conditions at which flow is occurring. Existing methods of measuring flowability of powders are described in this paper, and a new methodology is introduced to measure friction between granular materials under pressure induced with uniaxial compression. Apparatus also allows analysis of conditions at which granular material starts to flow when exposed to uniaxial compressive load, i.e., zero-rate flowability. We call the apparatus the Granular Friction Analyzer (GFA). The concept of the GFA was tested by measuring four different materials with different average particle sizes. It was observed that as the particle size decreases so does its zero-rate flowability. This is in agreement with powder literature. Therefore, it can be concluded that in general the GFA method can be a very useful tool to study friction between granular materials and conditions at which the granular material flow initiates, i.e. zero-rate flowability of powders under pressure. However, further improvements are required to increase its sensitivity and accuracy. granular materials inherent friction zero-rate flowability granular flow metal powders uniaxial compression granulirani materiali kovinski prah enoosna kompresija pretočnost inherentno trenje pretočnost granuliranih materialov true false true Angleški jezik Slovenski jezik Članek v reviji 2018-12-05 12:36:37 2018-12-05 12:36:40 2025-02-24 10:34:50 0000-00-00 00:00:00 2016 0 0 Str. 255-265 Vol. 288 Jan. 2016 0000-00-00 PostprintKoncna Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 2018-01-31 620.1:62-492-026.772(045) 0032-5910 10.1016/j.powtec.2015.11.014 14351899 6576645 RAZ_Bek_Marko_i2016.pdf RAZ_Bek_Marko_i2016.pdf 1 8FABC840087E6201397236741F950828 eba1c3a325c465ba5395c8e40156f4939a35a4e47f6841aefe841a755d18e3dc 329f51c0-a1b6-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=116219 https://www.sciencedirect.com/science/article/pii/S0032591015301571?via%3Dihub 1 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=116723 Fakulteta za strojništvo 0 0 0