Breakage Strength of Wood Sawdust Pellets: Measurements and Modelling
| Autor: | Grzegorz Jozefaciuk, Piotr Parafiniuk, Mateusz Stasiak, Józef Horabik, Maciej Bańda, Agnieszka Adamczuk, Rafał Kobyłka, Marek Molenda, Joanna Wiącek, Cezary Polakowski |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Technology
Materials science 020209 energy bonded particle model Pellets 02 engineering and technology Article Breakage Pellet Ultimate tensile strength 0202 electrical engineering electronic engineering information engineering General Materials Science Composite material sawdust pellets Microscopy QC120-168.85 Moisture QH201-278.5 021001 nanoscience & nanotechnology Engineering (General). Civil engineering (General) Discrete element method TK1-9971 Descriptive and experimental mechanics tensile strength visual_art visual_art.visual_art_medium Sawdust Electrical engineering. Electronics. Nuclear engineering diametral compression test Deformation (engineering) TA1-2040 0210 nano-technology |
| Zdroj: | Materials Materials, Vol 14, Iss 3273, p 3273 (2021) Volume 14 Issue 12 |
| ISSN: | 1996-1944 |
| Popis: | Wood pellets are an important source of renewable energy. Their mechanical strength is a crucial property. In this study, the tensile strength of pellets made from oak, pine, and birch sawdust with moisture contents of 8% and 20% compacted at 60 and 120 MPa was determined in a diametral compression test. The highest tensile strength was noted for oak and the lowest for birch pellets. For all materials, the tensile strength was the highest for a moisture content of 8% and 120 MPa. All pellets exhibited a ductile breakage mode characterised by a smooth and round stress–deformation relationship without any sudden drops. Discrete element method (DEM) simulations were performed to check for the possibility of numerical reproduction of pelletisation of the sawdust and then of the pellet deformation in the diametral compression test. The pellet breakage process was successfully simulated using the DEM implemented with the bonded particle model. The simulations reproduced the results of laboratory testing well and provided deeper insight into particle–particle bonding mechanisms. Cracks were initiated close to the centre of the pellet and, as the deformation progressed, they further developed in the direction of loading. |
| Databáze: | OpenAIRE |
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