The variation of the unitary stresses occurring in the working part in relation to the type of soil, using the finite element method

5th ModTech International Conference - Modern Technologies in Industrial Engineering

Chiorescu, E.^1 ; Chiorescu, D.^1

University of Agronomical Sciences and Veterinary Medicine, 3 Mihail Sadoveanu Street, Iai

700490, Romania^1

关键词: Drucker-Prager;    Friction coefficients;    Mechanical characteristics;    Moving velocity;    Normal stress;    Plastic behavior;    Programming software;    Working parts;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/227/1/012023/pdf
DOI  :  10.1088/1757-899X/227/1/012023

来源: IOP

【 摘 要 】

Agriculture brings a major contribution to the sustainable development of the economy, providing food to people. Because of the continuous growth of the population, there is an ever increasing need of food worldwide. For this reason, it is necessary to study the contact between the soil and the active tool of the cultivators, in relation to the type of soil and its parameters. The physical-mechanical characteristics of the soils are influenced by the moving velocity of the working part, as well as by the humidity of the soil. The humidity triggers the change of the friction coefficient at the soil-steel contact, being of significant importance for the decrease of the working resistance of the working tools and responsible for increasing exploitation costs. The model used for the soil has a non-linear plastic behavior of the Drucker Prager type, being different from the Mises model. The programming software Ansys was used for the simulation with the finite element method, allowing the study of the behavior of the active working part, the normal stress being analyzed in real conditions, at various depths and velocities for a soil with a clay-sandy texture.