Discrete Element Method (DEM) Modelling of Cohesive Soil-Tool Interaction
Modeliranje kohezivne interakcije između zemljišta i oruđa metodom diskretnih elemenata
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Author
Kotrocz, Krisztian
Tamas, Kornel
Kerenyi, Gyorgy
Keywords
discrete elementDEM
parallel bond
cohesive soil
tool
diskretni elementi
paralelni spoj
kohezija zemljišta
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The soil tool interaction is an important role in modern agricultural researches. In this paper a cultivation tine tool was simulated in operation with the working speed of 1 m s-1 and working depth of 20 cm using discrete element method (DEM). The parallel bond model was used to demonstrate the cohesive behaviour of the soil. Three analyses were created with different material properties and during the simulations the draft force was measured to compare it with soil bin tests’ results. After the soil tool analyses three tri axial tests were performed with the same material properties to measure the cohesion and the internal friction angle. Interakcija između zemljišta i oruđa ima važnu ulogu u savremenim poljoprivrednim istraživanjima. U ovom radu je prikazana simulacija rada noža radnog organa za obradu zemljišta čija je radna brzina 1 m s-1 a radna dubina 20 cm korišćenjem modeliranja metodom diskretnih elemenata (DEM). Korišten je paralelan model da bi se pokazalo kohezivno ponašanje zemljišta. Napravljene su tri analize sa različitim materijalnim osobinama i tokom simulacije merena je vučna sila da bi se uporedila sa rezultatima testova u zemljišnom bazenu. Posle analize zemljište – oruđe, izvedena su tri tro-aksijalna testa sa istim osobinama materijala u cilju merenja kohezije i ugla unutrašnjeg trenja.