FEM modelling of soil behaviour under compressive loads

International Conference on Applied Sciences 2016

Ungureanu, N.^1 ; Vldu, V.^2 ; Biri, S.S.^1

Politehnica University of Bucharest, Department of Biotechnical Systems Engineering, 313 Splaiul Independenei blv., Bucharest

060042, Romania^1

Natl. Inst. of Res.-Devmt. for Machines and Installations Designed to Agriculture and Food Industry, INMA Bucharest, 6 Ion Ionescu de la Brad blv., Bucharest

013813, Romania^2

关键词: Agricultural productions;    Agricultural soils;    Compressive loads;    Different sizes;    External loads;    Soil behaviors;    Soil behaviour;    Soil compaction;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/163/1/012001/pdf
DOI  :  10.1088/1757-899X/163/1/012001

来源: IOP

【 摘 要 】

Artificial compaction is one of the most dangerous forms of degradation of agricultural soil. Recognized as a phenomenon with multiple negative effects in terms of environment and agricultural production, soil compaction is strongly influenced by the size of external load, soil moisture, size and shape of footprint area, soil type and number of passes. Knowledge of soil behavior under compressive loads is important in order to prevent or minimize soil compaction. In this paper were developed, by means of the Finite Element Method, various models of soil behavior during the artificial compaction produced by the wheel of an agricultural trailer. Simulations were performed on two types of soil (cohesive and non-cohesive) with known characteristics. By applying two loads (4.5 kN and 21 kN) in footprints of different sizes, were obtained the models of the distributions of stresses occuring in the two types of soil. Simulation results showed that soil stresses increase with increasing wheel load and vary with soil type.