<?xml version="1.0" encoding="utf-8"?>
<export-example>
  <doc>
    <id>1500</id>
    <completedYear/>
    <publishedYear>2017</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>191</pageFirst>
    <pageLast>205</pageLast>
    <pageNumber/>
    <edition/>
    <issue>3</issue>
    <volume>4</volume>
    <type>article</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Specimen Preparation and Material Characterization of Filament Wound GFRP Composite Tubes</title>
    <abstract language="eng">Filament wound composite structures are widely used in the field of pressure vessels, tubes, pipelines or rocket cases. The mechanical  behavior of these structures is typically different from those of flat laminated structures due to an alternating lay-up sequence, winding tension and manufacturing induced imperfections. However, design and   analysis issues require the same engineering data as used for  laminated structures in general. It has therefore become necessary to establish an accompanying quality assurance procedure following the production process to identify the material properties of the  manufactured tubes especially for the single layer. Consequently, there are three different approaches of determining the elastic  moduli and tensile strengths of a filament wound laminate. Either specimens are resected from a curved tube, from a tube with plane  areas or standardized flat specimens are manufactured under deviating production conditions. All approaches entail disadvantages, whether in terms of manufacturing or testing parameters including geometry, lay-up sequence, porosity, fiber tension and load direction. This study presents the discrepancies in the determination of mechanical  properties of a filament wound glass-fiber-reinforced polymer tube on curved or cylindrical specimens and flat specimens produced to meet the  specifications of international standards. In order to obtain  material properties not only in longitudinal but also in transverse  direction of the tubes, the so-called split-disk tensile test modeled after ASTM Standard D 2290, is used with tube segments.The procedures  of specimen production and preparation are described in detail. Material properties such as the fiber volume and void content of the  composite specimens are conducted in order to consider quality and  production differences. Finally tensile tests are performed and the results are compared and discussed.</abstract>
    <parentTitle language="eng">Athens Journal of Technology &amp; Engineering</parentTitle>
    <identifier type="url">https://www.athensjournals.gr/technology/2017-4-3-2-Kastenmeier.pdf</identifier>
    <author>Andreas Kastenmeier</author>
    <author>Vinzent Schmid</author>
    <author>Ingo Ehrlich</author>
    <author>P. Petratos</author>
    <author>N. Mourtos</author>
    <author>T. Trafalis</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Composite</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Fiber-reinforced polymer</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Filament winding</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Split-disk</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Tensile tests</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Tubes</value>
    </subject>
    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="institutes" number="FAKMB">Fakultät Maschinenbau</collection>
    <collection role="institutes" number="TCNeustadt">Technologie-Campus Neustadt an der Donau</collection>
    <collection role="persons" number="ehrlichlft">Ehrlich, Ingo (Prof. Dr.) - Labor Faserverbundtechnik</collection>
    <collection role="persons" number="tcnehno">Technologie-Campus Neustadt a. d. Donau (Prof. Ehrlich+ Prof. Nonn)</collection>
    <collection role="othforschungsschwerpunkt" number="16316">Produktion und Systeme</collection>
    <collection role="institutes" number="">Labor Faserverbundtechnik (LFT)</collection>
  </doc>
  <doc>
    <id>1503</id>
    <completedYear/>
    <publishedYear>2016</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>315</pageFirst>
    <pageLast>331</pageLast>
    <pageNumber/>
    <edition/>
    <issue>4</issue>
    <volume>3</volume>
    <type>article</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Detection of Delamination Damages in Thin Composite Plates using Noncontact Measurement of Structural Dynamic Behavior</title>
    <parentTitle language="eng">Athens Journal of Technology &amp; Engineering</parentTitle>
    <identifier type="doi">10.30958/AJTE.3-4-3</identifier>
    <author>Christian Pongratz</author>
    <author>Matthias Schlamp</author>
    <author>Bastian Jungbauer</author>
    <author>Ingo Ehrlich</author>
    <author>P. Petratos</author>
    <author>N. Mourtos</author>
    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="institutes" number="FAKMB">Fakultät Maschinenbau</collection>
    <collection role="institutes" number="TCNeustadt">Technologie-Campus Neustadt an der Donau</collection>
    <collection role="persons" number="ehrlichlft">Ehrlich, Ingo (Prof. Dr.) - Labor Faserverbundtechnik</collection>
    <collection role="persons" number="tcnehno">Technologie-Campus Neustadt a. d. Donau (Prof. Ehrlich+ Prof. Nonn)</collection>
    <collection role="othforschungsschwerpunkt" number="16316">Produktion und Systeme</collection>
    <collection role="institutes" number="">Labor Faserverbundtechnik (LFT)</collection>
  </doc>
</export-example>
