<?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>0012-7353</journal-id>
<journal-title><![CDATA[DYNA]]></journal-title>
<abbrev-journal-title><![CDATA[Dyna rev.fac.nac.minas]]></abbrev-journal-title>
<issn>0012-7353</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional de Colombia]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0012-73532019000100234</article-id>
<article-id pub-id-type="doi">10.15446/dyna.v86n208.70484</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Manufacturing and reliability of a fiber Bragg grating strain sensor designed for uniaxial compression test of rocks]]></article-title>
<article-title xml:lang="es"><![CDATA[Fabricación y confiabilidad de un sensor de deformación de redes de Bragg en fibra óptica para ensayos de compresión uniaxial de rocas]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castro-Caicedo]]></surname>
<given-names><![CDATA[Alvaro J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Torres]]></surname>
<given-names><![CDATA[Pedro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Nieto-Callejas]]></surname>
<given-names><![CDATA[Maria J.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lain-Huerta]]></surname>
<given-names><![CDATA[Ricardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Suarez-Burgoa]]></surname>
<given-names><![CDATA[Ludger O.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional de Colombia Facultad de Minas ]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional de Colombia Department of Physics ]]></institution>
<addr-line><![CDATA[Medellín Campus ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Politécnica de Madrid  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Spain</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>03</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>03</month>
<year>2019</year>
</pub-date>
<volume>86</volume>
<numero>208</numero>
<fpage>234</fpage>
<lpage>242</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0012-73532019000100234&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0012-73532019000100234&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0012-73532019000100234&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract In this work we present an optical Fiber Bragg Grating (FBG) strain sensor appropriate for uniaxial compression test of rocks. The rocks are a complex aggregate of materials and may exhibit in some cases mineral grains of size bigger than the conventional electrical strain gages used. Furthermore, commercial surface mountable optical FBG strain sensors are packaged in planar configuration, which is not appropriate for the cylindrical rock cores in uniaxial compression test. The optical FBG sensors were designed and manufactured manually fitted for cylindrical rock samples. A calibration process was carried out in order to stablish the mechanical performance of the FBG packaging; later, a compression test was conducted on hard rock sample and the strain was recorded by the traditional electrical strain gage (ESG) and FBG system. Under this comparison, the FBG sensors reaches a larger recording area, sensitivity under 100 microstrain and a reliable strain transfer, all of which is appropriate to measure strain for heterogeneous rock composition and minerals grain size.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen En este trabajo presentamos un sensor de deformación de redes de Bragg en fibra óptica (FBG) diseñado para el ensayo de compresión uniaxial de rocas. Las rocas son un agregado complejo de materiales y pueden exhibir en algunos casos granos minerales de un tamaño mucho mayor que las galgas extensométricas eléctricas utilizadas convencionalmente. Además, los sensores de deformación FBG comerciales se elaboran como un paquete plano, lo que no es apropiado para los núcleos de roca cilíndricos en la prueba de compresión uniaxial. Los sensores FBG ópticos empaquetados se diseñaron y fabricaron de forma manual adecuados para muestras de rocas cilíndricas. Se llevó a cabo un proceso de calibración para establecer el desempeño mecánico del empaquetado FBG, posteriormente, se realizó un ensayo de compresión en una muestra de roca dura usando el sistema tanto de galgas extensométricas eléctricas (ESG) como el sistema FBG creado. En esta comparación, los sensores FBG demuestran un área de registro mayor, sensibilidad por debajo de 100 microstrain y una transferencia de deformación confiable, apropiadas para el registro de las deformaciones de rocas con heterogeneidad de tamaño y composición de los minerales.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[uniaxial compression test]]></kwd>
<kwd lng="en"><![CDATA[optical fiber]]></kwd>
<kwd lng="en"><![CDATA[fiber Bragg grating]]></kwd>
<kwd lng="en"><![CDATA[rock]]></kwd>
<kwd lng="en"><![CDATA[strain]]></kwd>
<kwd lng="es"><![CDATA[ensayo de compresión uniaxial]]></kwd>
<kwd lng="es"><![CDATA[fibra óptica, redes de Bragg]]></kwd>
<kwd lng="es"><![CDATA[roca]]></kwd>
<kwd lng="es"><![CDATA[deformación]]></kwd>
</kwd-group>
</article-meta>
</front><back>
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<surname><![CDATA[Xu]]></surname>
<given-names><![CDATA[L.R]]></given-names>
</name>
</person-group>
<article-title xml:lang=""><![CDATA[Systematic evaluation of bonding strengths and fracture toughnesses of adhesive joints]]></article-title>
<source><![CDATA[The Journal of Adhesion]]></source>
<year>2011</year>
<volume>87</volume>
<numero>1</numero>
<issue>1</issue>
</nlm-citation>
</ref>
</ref-list>
</back>
</article>
