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  <doc>
    <id>52634</id>
    <completedYear/>
    <publishedYear>2021</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>91</pageFirst>
    <pageLast>92</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
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    <title language="eng">Measurement and simulation of Lamb waves in adhesive-bonded multilayer systems</title>
    <abstract language="eng">Lamb waves are a common tool in the field of non-destructive testing and are widely used for materialcharacterisation. Further, the increasing computational capability of modern systems enables the Simulation of complex and detailed material models. This work demonstrates the possibility of simulating an adhesive-bonded multilayer system by characterising each layer individually, and introduces an Approach for determining the dispersive behaviour of acoustic waves in a multilayer system via real measurements.</abstract>
    <parentTitle language="eng">SMSI 2021 - Measurement Science</parentTitle>
    <identifier type="doi">10.5162/SMSI2021/A8.2</identifier>
    <enrichment key="eventName">SMSI 2021 Conference – Sensor and Measurement Science International</enrichment>
    <enrichment key="eventPlace">Online meeting</enrichment>
    <enrichment key="eventStart">03.05.2021</enrichment>
    <enrichment key="eventEnd">06.05.2021</enrichment>
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    <author>H. Zeipert</author>
    <author>L. Claes</author>
    <author>S. Johannesmann</author>
    <author>M. Webersen</author>
    <author>Yevgeniya Lugovtsova</author>
    <author>Jens Prager</author>
    <author>B. Henning</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Adhesive bonds</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Lamb waves</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Elastic constants</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Non-Destructive Testing</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Ultrasound</value>
    </subject>
    <collection role="ddc" number="543">Analytische Chemie</collection>
    <collection role="institutes" number="">8 Zerstörungsfreie Prüfung</collection>
    <collection role="institutes" number="">8.4 Akustische und elektromagnetische Verfahren</collection>
    <collection role="themenfelder" number="">Chemie und Prozesstechnik</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
    <collection role="literaturgattung" number="">Graue Literatur</collection>
  </doc>
  <doc>
    <id>53762</id>
    <completedYear/>
    <publishedYear>2021</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>962</pageFirst>
    <pageLast>969</pageLast>
    <pageNumber/>
    <edition/>
    <issue>11</issue>
    <volume>69</volume>
    <type>article</type>
    <publisherName>De Gruyter</publisherName>
    <publisherPlace>Berlin/Boston</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>1</belongsToBibliography>
    <completedDate>--</completedDate>
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    <title language="eng">An approach to adhesive bond characterisation using guided acoustic waves in multi-layered plates</title>
    <abstract language="eng">An approach for the non-destructive characterisation of adhesive bonds using guided ultrasonic waves is presented. Pulsed laser radiation is used to thermoacoustically excite broadband ultrasonic waves in a multi-layered sample, consisting of a metal plate adhesively joined to a polymeric layer using synthetic resin. The resulting signals are received by a purpose-built piezoelectric transducer. Varying the distance between excitation and detection yields spatio-temporal measurement data, from which the dispersive properties of the propagating waves can be inferred using a two-dimensional Fourier transform, assuming the plates to act as coupled waveguides. Coupled multi-layered waveguides show an effect referred to as mode repulsion, where the distance between certain modes in the frequency-wavenumber domain is assumed to be a measure of coupling strength. Measurements at different stages of curing of the adhesive layer are performed and evaluated. A comparison of the results shows changes in the dispersive properties, namely an increased modal bandwidth for the fully cured sample as well as an increased modal distance.</abstract>
    <parentTitle language="eng">at - Automatisierungstechnik</parentTitle>
    <identifier type="doi">10.1515/auto-2021-0089</identifier>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="date_peer_review">20.04.2022</enrichment>
    <author>H. Zeipert</author>
    <author>L. Claes</author>
    <author>S. Johannesmann</author>
    <author>Yevgeniya Lugovtsova</author>
    <author>Marcel Nicolai</author>
    <author>Jens Prager</author>
    <author>Bernd Henning</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Adhesive bonding</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Guided waves</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Non-destructive testing</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Ultrasound</value>
    </subject>
    <collection role="ddc" number="543">Analytische Chemie</collection>
    <collection role="institutes" number="">8 Zerstörungsfreie Prüfung</collection>
    <collection role="institutes" number="">8.4 Akustische und elektromagnetische Verfahren</collection>
    <collection role="themenfelder" number="">Chemie und Prozesstechnik</collection>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
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  </doc>
  <doc>
    <id>65357</id>
    <completedYear/>
    <publishedYear>2025</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>207</pageFirst>
    <pageLast>210</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName>AMA Service GmbH</publisherName>
    <publisherPlace/>
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    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">C6-a3 - Monitoring the curing process of adhesive bonds using selective excitation of guided ultrasonic waves</title>
    <abstract language="eng">A measurement setup for the selective excitation of guided ultrasonic waves in adhesively bonded plates is introduced. Changes of the dispersive behaviour of the guided waves during the curing process is known to be accompanied by a change in the propagating waves group velocities. The proposed measurement setup is used to monitor that change during the curing process of an aluminium-epoxy-polycarbonate bond.</abstract>
    <parentTitle language="eng">Lectures</parentTitle>
    <identifier type="doi">10.5162/Ultrasonic2025/C6-a3</identifier>
    <enrichment key="opus_doi_flag">true</enrichment>
    <enrichment key="local_crossrefDocumentType">proceedings-article</enrichment>
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    <enrichment key="eventName">2025 ICU PADERBORN - 9th International Congress on Ultrasonics</enrichment>
    <enrichment key="eventPlace">Paderborn, Germany</enrichment>
    <enrichment key="opus.source">doi-import</enrichment>
    <enrichment key="eventStart">21.09.2025</enrichment>
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    <author>H. Zeipert</author>
    <author>T. Nellius</author>
    <author>N. Schönlau</author>
    <author>M. Wippermann</author>
    <author>L. Claes</author>
    <author>B. Henning</author>
    <author>Marcel Nicolai</author>
    <author>J. Prager</author>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Ultrasonic guided waves</value>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Selective excitation</value>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Non-destructive testing</value>
    </subject>
    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Adhesive bonding</value>
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    <subject>
      <language>eng</language>
      <type>uncontrolled</type>
      <value>Condition monitoring</value>
    </subject>
    <collection role="ddc" number="620">Ingenieurwissenschaften und zugeordnete Tätigkeiten</collection>
    <collection role="institutes" number="">8 Zerstörungsfreie Prüfung</collection>
    <collection role="institutes" number="">8.4 Akustische und elektromagnetische Verfahren</collection>
    <collection role="themenfelder" number="">Material</collection>
    <collection role="literaturgattung" number="">Verlagsliteratur</collection>
    <collection role="fulltextaccess" number="">Datei im Netzwerk der BAM verfügbar ("Closed Access")</collection>
    <collection role="themenfelder" number="">Advanced Materials</collection>
  </doc>
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