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Effect of the Geometry of the Arm of a Vibratory Scarifier


 
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Revista Ciencias Técnicas Agropecuarias

 ISSN 2071-0054

MARIN-CABRERA, Luis Orlando; GARCIA DE LA FIGAL-COSTALES, Armando Eloy    MARTINEZ-RODRIGUEZ, Arturo. Effect of the Geometry of the Arm of a Vibratory Scarifier. []. , 29, 2, pp. 5-14.   01--2020. ISSN 2071-0054.

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Both draft force and soil breaking up of clods of soil are in function of the kind of tool, geometry and operational conditions. In order to analyze the effect of the conditions of operation (density of mesh) and the geometry (attack angle of wedge) in the tractional force of a vibratory scarifier of curved arm tilling a Rhodic Ferralsol soil , the soil was considered as homogeneous material. The model extended linear Drucker Prager's elastoplastic of constitutive relation was used for this modelation by finite elements and soil-tillage tool interaction was modeled with surface to surface contact and the software Solid Works and its complement simulation were used. When increasing the angle of attack of the wedge, the grade increases in displacement of the particles of soil, both, in the direction of advance of the tool and in vertical sense, and the values of the tensions of contact in the nodes grow, mainly located in the tip of the tillage tool of cultivation and the plane of the undersurface of the deformed soil prism.

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Tanto las fuerzas de tracción como las desterrpnamiento del suelo están en función del tipo de herramienta, geometría y condiciones de operación. Para analizar el efecto de las condiciones de operación (densidad de malla) y la geometría (ángulo de ataque de la cuña) en las fuerzas de tracción de un escarificador vibratorio de brazo curvo labrando un suelo Rhodic Ferralsol, se consideró el suelo como material homogéneo, siendo empleado el modelo elastoplástico de relación constitutiva de Drucker-Prager extendido lineal para su modelación por elementos finitos y la interacción suelo-herramienta de labranza con modelo de contacto superficie a superficie, mediante el software utilizado fue Solid Works y su complemento simulation. Al aumentar el ángulo de ataque de la cuña aumenta el grado de desplazamiento de las partículas del suelo, tanto en la dirección de avance de la herramienta como en sentido vertical, crecen los valores de las tensiones de contacto en los nodos, localizadas fundamentalmente en la punta de la herramienta de labranza y el plano de la superficie inferior del prisma de suelo deformado.

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