<?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>1815-5944</journal-id>
<journal-title><![CDATA[Ingeniería Mecánica]]></journal-title>
<abbrev-journal-title><![CDATA[Ingeniería Mecánica]]></abbrev-journal-title>
<issn>1815-5944</issn>
<publisher>
<publisher-name><![CDATA[Facultad de Ingeniería Mecánica. Instituto Superior Politécnico "José Antonio Echeverría"]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1815-59442019000300142</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Evaluación a fractura de probetas de sección transversal cuadrada solicitadas a torsión cíclica]]></article-title>
<article-title xml:lang="en"><![CDATA[Fracture evaluation of square transversal section specimens subjected by torsional cyclic loads]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Almaguer-Zaldivar]]></surname>
<given-names><![CDATA[Pavel Michel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Zambrano-Robledo]]></surname>
<given-names><![CDATA[Patricia]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez-Grave de Peralta]]></surname>
<given-names><![CDATA[José Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cabral Miramontes]]></surname>
<given-names><![CDATA[José Ángel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pino-Tarragó]]></surname>
<given-names><![CDATA[Julio César]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Holguín Facultad de Ingeniería Mecánica ]]></institution>
<addr-line><![CDATA[ Holguín]]></addr-line>
<country>Cuba</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Autónoma de Nuevo León  ]]></institution>
<addr-line><![CDATA[ Nuevo León]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Estatal del Sur de Manabí Facultad de Ciencias Técnicas ]]></institution>
<addr-line><![CDATA[ Manabí]]></addr-line>
<country>Ecuador</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<volume>22</volume>
<numero>3</numero>
<fpage>142</fpage>
<lpage>149</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_arttext&amp;pid=S1815-59442019000300142&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_abstract&amp;pid=S1815-59442019000300142&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://scielo.sld.cu/scielo.php?script=sci_pdf&amp;pid=S1815-59442019000300142&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En este trabajo se realizó la evaluación del crecimiento de grietas en probetas de sección transversal cuadrada solicitadas por momentos torsores cíclicos simétricos. Las probetas se fabricaron de AISI 1015. Se maquinó una pre-grieta en una cara para inducir el crecimiento de la grieta. La longitud de la grieta con el aumento del número de ciclos se midió mediante el método de los líquidos penetrantes. Mediante el Método de los Elementos Finitos se simuló el estado tensional - deformacional de las probetas. Se determinaron los desplazamientos en la punta de la grieta para aplicar la técnica de los Desplazamientos de Apertura de la Punta de la Grieta para calcular el Factor de Intensidad de Tensiones. Este se relacionó con las dimensiones de la probeta y el tamaño de la grieta para proponer una ecuación para la función de forma. Se propuso una Ley de Paris en el modo de fallo III]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract In this work, the evaluation of the growth of cracks in specimens of square cross section requested by symmetrical cyclic torsion moments was performed. The specimens were manufactured from AISI 1015. A pre-crack was machined on one side to induce the crack growth. The crack length with the increase in the number of cycles was measured by means of penetrating liquids method. By means of the Finite Element Method, the stress - strain state of the specimens was simulated. The displacements in the tip of the crack were determined to apply the technique of the Crack Tip Opening Displacements to calculate the Stress Intensity Factor. The calculated Stress Intensity Factor was related to the dimensions of the specimen and the size of the crack to propose an equation for the shape function. A Paris´s Law in mode of failure III was proposed.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[función de forma]]></kwd>
<kwd lng="es"><![CDATA[ley de parís]]></kwd>
<kwd lng="es"><![CDATA[torsión cíclica]]></kwd>
<kwd lng="es"><![CDATA[grieta]]></kwd>
<kwd lng="es"><![CDATA[Método de los Elementos Finitos]]></kwd>
<kwd lng="en"><![CDATA[shape function]]></kwd>
<kwd lng="en"><![CDATA[paris´s law]]></kwd>
<kwd lng="en"><![CDATA[cyclic torsion]]></kwd>
<kwd lng="en"><![CDATA[crack]]></kwd>
<kwd lng="en"><![CDATA[Finite Element Method]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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