<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2071-0054</journal-id>
<journal-title><![CDATA[Revista Ciencias Técnicas Agropecuarias]]></journal-title>
<abbrev-journal-title><![CDATA[Rev Cie Téc Agr]]></abbrev-journal-title>
<issn>2071-0054</issn>
<publisher>
<publisher-name><![CDATA[Universidad Agraria de La Habana]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2071-00542020000200005</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Effect of the Geometry of the Arm of a Vibratory Scarifier]]></article-title>
<article-title xml:lang="es"><![CDATA[Efecto de la geometría de la cuña del brazo de un escarificador vibratorio]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Marín-Cabrera]]></surname>
<given-names><![CDATA[Luis Orlando]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García de la Figal-Costales]]></surname>
<given-names><![CDATA[Armando Eloy]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez-Rodríguez]]></surname>
<given-names><![CDATA[Arturo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Agraria de La Habana (UNAH) Facultad de Ciencias Técnicas Centro de Mecanización Agropecuaria]]></institution>
<addr-line><![CDATA[San José de las Lajas Mayabeque]]></addr-line>
<country>Cuba</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2020</year>
</pub-date>
<volume>29</volume>
<numero>2</numero>
<fpage>5</fpage>
<lpage>14</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S2071-00542020000200005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S2071-00542020000200005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S2071-00542020000200005&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT 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.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN 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.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Finite elements]]></kwd>
<kwd lng="en"><![CDATA[force of traction]]></kwd>
<kwd lng="en"><![CDATA[density of mesh]]></kwd>
<kwd lng="en"><![CDATA[attack angle of wedge]]></kwd>
<kwd lng="es"><![CDATA[elementos finitos]]></kwd>
<kwd lng="es"><![CDATA[fuerza de tracción]]></kwd>
<kwd lng="es"><![CDATA[densidad de malla]]></kwd>
<kwd lng="es"><![CDATA[ángulo de ataque de la cuña]]></kwd>
</kwd-group>
</article-meta>
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