The analysis of the distribution of unitary stresses for the universal plowshare in tiller seeder combos (UPTSC)

[摘要] The sustainable development of agriculture is an important component of economic and social progress of the mankind aiming especially at promoting environmentally friendly systems and technologies. Thus, the implementation of sustainable agriculture also requires some high performance farming aggregates such as tiller seeder combos. Their most stressed active working part is the plowshare which has an important part in cutting the soil. For this reason, we consider that theoretical and experimental research is needed for the tear to which this working part is subjected to. This paper analyses the behavior of the universal plowshare, component part of UPTSC, using the Finite Element Method (FEM) and the Ansys software program. With the help of FEM, we analyzed the universal plowshare in the material structure during the soil cutting process, highlighting the deformation degree and the stress field in the working part. In the first stage, we identified a representative set of problems concerning the soil cutting process, for which we designed the solutions through numerical simulations. In the processing stage, we designed a 3D model which respects entirely the geometric shape of the active element in Cartesian coordinates. In order to simulate the soil cutting process in accordance with the real conditions, the compilations are done for various refinement degrees of the discretization network in finite elements. In the same stage we introduced the constraints represented by: the fixation of the plowshare support, direction, as well as the action of the cohesion and shear strength. Using the Explicit Dynamics module of the Ansys software, which allows studying the plowshare behavior, we analyzed in real conditions, the normal and the shear stresses as well as the deformation, for various soil types and various soil states. Considering the data on the existent stresses, following the FEM analysis of the working part, we determined the wear and suggested the safety coefficients for this case.

[发布机构] Ion Ionescu de la Brad University of Agricultural Sciences and Veterinary Medicine, Mihail Sadoveanu Alley, 3, Iai; 700490, Romania^1;Gheorghe Asachi Tehnical University, 59 A, Dimitrie Mangeron Blvd, Iai; 700050, Romania^2;Gheorghe Asachi Tehnical University, Dimitrie Mangeron Blvd, 43, Iai; 700050, Romania^3

[效力级别] 能源学

[关键词] Cartesian coordinate;Deformation degrees;Environmentally friendly systems;Experimental research;Explicit dynamics;Material structure;Safety coefficient;Sustainable agriculture