<?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>1665-3521</journal-id>
<journal-title><![CDATA[Superficies y vacío]]></journal-title>
<abbrev-journal-title><![CDATA[Superf. vacío]]></abbrev-journal-title>
<issn>1665-3521</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Mexicana de Ciencia y Tecnología de Superficies y Materiales A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1665-35212009000200005</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Modelo numérico de esparcimiento de luz láser en superficies metálicas usando el método de Monte Carlo]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Martínez Fuentes]]></surname>
<given-names><![CDATA[Víctor]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Domínguez López]]></surname>
<given-names><![CDATA[Iván]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García García]]></surname>
<given-names><![CDATA[Adrián Luis]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Instituto Politécnico Nacional Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada Laboratorio de Tribología]]></institution>
<addr-line><![CDATA[ Querétaro]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2009</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2009</year>
</pub-date>
<volume>22</volume>
<numero>2</numero>
<fpage>29</fpage>
<lpage>35</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1665-35212009000200005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1665-35212009000200005&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1665-35212009000200005&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Se aplica el método de Monte Carlo para simular el fenómeno de esparcimiento de luz láser (LLS) por una superficie maquinada mediante un proceso de torneado. El modelo se basa en la óptica geométrica e incorpora las características de rugosidad y propiedades ópticas de la superficie, así como la disposición de los elementos ópticos de la técnica LLS, como parámetros de entrada. La validación del modelo numérico se efectuó experimentalmente usando un patrón de rugosidad acanalado, de perfil periódico. La distribución de intensidad de luz registrada experimentalmente corresponde cualitativamente con el modelo propuesto. Se observa una correlación entre los radios de curvatura del patrón de esparcimiento del experimento y el modelo numérico. El modelo validado se aplicó a superficies cuya textura se modificó usando un aparato de perno en disco, con el que se provocó una huella de desgaste de rugosidad unidireccional, acanalada. Los resultados numéricos concuerdan de manera cualitativa con los experimentales.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[A Monte Carlo simulation was implemented to emulate the phenomenon of laser light scattering (LLS) by a turned surface. The model is based on geometrical optics and uses surface roughness, surface optical properties and space arrangement of the optical elements of the LLS technique, as input parameters. Validation of the model was performed experimentally using a periodical grooved-profile roughness standard. The distribution of scattered laser light registered experimentally corresponds qualitatively with the model here in. A correlation was established between the curvature radius obtained experimentally, and those obtained numerically. The validated model was applied to surfaces whose texture was modified using a pin-on-disk apparatus, causing a unidirectional grooved wear scar. Numerical results agree quite satisfactorily with the experiment.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[LLS]]></kwd>
<kwd lng="es"><![CDATA[Método Monte Carlo]]></kwd>
<kwd lng="es"><![CDATA[Torneado]]></kwd>
<kwd lng="es"><![CDATA[Superficie maquinada]]></kwd>
<kwd lng="es"><![CDATA[Óptica geométrica]]></kwd>
<kwd lng="es"><![CDATA[Desgaste]]></kwd>
<kwd lng="es"><![CDATA[Simulación numérica]]></kwd>
<kwd lng="en"><![CDATA[LLS]]></kwd>
<kwd lng="en"><![CDATA[Monte Carlo Method]]></kwd>
<kwd lng="en"><![CDATA[Turning]]></kwd>
<kwd lng="en"><![CDATA[Machined surface]]></kwd>
<kwd lng="en"><![CDATA[Geometric optics]]></kwd>
<kwd lng="en"><![CDATA[Wear]]></kwd>
<kwd lng="en"><![CDATA[Numerical simulation]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[ <p align="center"><font face="verdana" size="4"><b>Modelo num&eacute;rico de esparcimiento de luz l&aacute;ser en superficies met&aacute;licas usando el m&eacute;todo de Monte Carlo</b></font></p>     <p align="center"><font face="verdana" size="2">&nbsp;</font></p>     <p align="center"><font face="verdana" size="2"><b>V&iacute;ctor Mart&iacute;nez Fuentes, Iv&aacute;n Dom&iacute;nguez L&oacute;pez, Adri&aacute;n Luis Garc&iacute;a Garc&iacute;a*</b></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><i>Laboratorio de Tribolog&iacute;a. CICATA-IPN. Unidad Quer&eacute;taro Cerro Blanco 141. Colinas del Cimatario. Quer&eacute;taro, M&eacute;xico. 76090. Correo: *</i><a href="mailto:agarciag@ipn.mx">agarciag@ipn.mx</a></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2">Recibido: 19 de febrero de 2009.    <br> Aceptado: 2 de junio de 2009.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">Se aplica el m&eacute;todo de Monte Carlo para simular el fen&oacute;meno de esparcimiento de luz l&aacute;ser (LLS) por una superficie maquinada mediante un proceso de torneado. El modelo se basa en la &oacute;ptica geom&eacute;trica e incorpora las caracter&iacute;sticas de rugosidad y propiedades &oacute;pticas de la superficie, as&iacute; como la disposici&oacute;n de los elementos &oacute;pticos de la t&eacute;cnica LLS, como par&aacute;metros de entrada. La validaci&oacute;n del modelo num&eacute;rico se efectu&oacute; experimentalmente usando un patr&oacute;n de rugosidad acanalado, de perfil peri&oacute;dico. La distribuci&oacute;n de intensidad de luz registrada experimentalmente corresponde cualitativamente con el modelo propuesto. Se observa una correlaci&oacute;n entre los radios de curvatura del patr&oacute;n de esparcimiento del experimento y el modelo num&eacute;rico. El modelo validado se aplic&oacute; a superficies cuya textura se modific&oacute; usando un aparato de perno en disco, con el que se provoc&oacute; una huella de desgaste de rugosidad unidireccional, acanalada. Los resultados num&eacute;ricos concuerdan de manera cualitativa con los experimentales.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Palabras Clave: </b>LLS; M&eacute;todo Monte Carlo; Torneado; Superficie maquinada; &Oacute;ptica geom&eacute;trica; Desgaste; Simulaci&oacute;n num&eacute;rica.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p>     <p align="justify"><font face="verdana" size="2">A Monte Carlo simulation was implemented to emulate the phenomenon of laser light scattering (LLS) by a turned surface. The model is based on geometrical optics and uses surface roughness, surface optical properties and space arrangement of the optical elements of the LLS technique, as input parameters. Validation of the model was performed experimentally using a periodical grooved-profile roughness standard. The distribution of scattered laser light registered experimentally corresponds qualitatively with the model here in. A correlation was established between the curvature radius obtained experimentally, and those obtained numerically. The validated model was applied to surfaces whose texture was modified using a pin-on-disk apparatus, causing a unidirectional grooved wear scar. Numerical results agree quite satisfactorily with the experiment.</font></p>     <p align="justify"><font face="verdana" size="2"><b>Keywords: </b>LLS; Monte Carlo Method; Turning; Machined surface; Geometric optics; Wear; Numerical simulation.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><a href="/pdf/sv/v22n2/v22n2a5.pdf" target="_blank">DESCARGAR ART&Iacute;CULO EN FORMATO PDF</a></font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Agradecimientos</b></font></p>     ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2">Los autores agradecen el financiamiento otorgado por el CONACYT, proyecto 52329, y el Instituto Polit&eacute;cnico Nacional, proyecto SIP20082267. Uno de los autores (VM), tambi&eacute;n agradece a la Universidad Polit&eacute;cnica de Quer&eacute;taro las facilidades brindadas para su participaci&oacute;n en el presente trabajo.</font></p>     <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>     <p align="justify"><font face="verdana" size="2"><b>Referencias</b></font></p>     <!-- ref --><p align="justify"><font face="verdana" size="2">Y. Jeng, Z. Lin and S. 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