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	Provedor de dados CIGR Journal (1) REA (1) Autor Machado,Antônio L. T. (1) Ndisya, John (1) Trein,Carlos R. (1) Palavra-chave Draft requirement (2) Chiselling (1) Computer model (1) Discrete element method (1) Farm machinery Engineering Rake angle (1) Kenya (1) Soil dynamics (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2016 (1) 2013 (1) País Brazil (1) China (1) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Draft prediction models for soil engaging tines in two soils of Rio Grande do Sul, Brazil REA Machado,Antônio L. T.; Trein,Carlos R.. The draft forces of soil engaging tines and theoretical analysis compared to existing mathematical models, have yet not been studied in Rio Grande do Sul soils. From the existing models, those which can get the closest fitting draft forces to real measure on field have been established for two of Rio Grande do Sul soils. An Albaqualf and a Paleudult were evaluated. From the studied models, those suggested by Reece, so called "Universal Earthmoving Equation", Hettiaratchi and Reece, and Godwin and Spoor were the best fitting ones, comparing the calculated results with those measured "in situ". Allowing for the less complexity of Reece's model, it is suggested that this model should be used for modeling draft forces prediction for narrow tines in Albaqualf... Tipo: Info:eu-repo/semantics/article Palavras-chave: Chiselling; Draft requirement; Soil dynamics. Ano: 2013 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-69162013000100017 Investigation of the Effect of Rake Angle on the Draft Requirement of Ripping in a Sandy Clay Soil through Field Experiments and Computer Modelling CIGR Journal Ndisya, John. In this study, the effect of rake angle of a ripper plough on the draft requirement in a sandy-clay soil was investigated; the study was based on field experiments, laboratory tests and numerical simulation. Field experiments were conducted at the University of Nairobi field station in Upper Kabete, Kenya located at 1o15’S and 36o44’E at an altitude of about 1940 meters above sea level. The soil at the location is a humic Nitisol belonging to the class of sandy-clay. Field experiments featured the Factorial Completely Randomized Block design to eliminate experimental error. The plot was sub-divided into four blocks to eliminate variation due to distance and slope; the treatments were randomly assigned to the blocks and replicated four times.The numerical... Tipo: Info:eu-repo/semantics/article Palavras-chave: Farm machinery Engineering Rake angle; Draft requirement; Discrete element method; Computer model; Kenya. Ano: 2016 URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/3865 Registros recuperados: 2 Primeira ... 1 ... Última

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