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- Testing Adhesive Bonded joints using Air-coupled Ultrasound

<table border="0" cellpadding="10" cellspacing="0" width="100%"><tr><td align="center" valign="middle"><tr><td>NDT.net Issue: <a href="/search/docs.php3?issue=1&amp;date=2025-11-01&amp;showForm=" title="more of this">2025-11</a><br/><a href="/search/docs.php3?MainSource=373" title="more of this">Selected Papers from the DGZfP Annual Conference 2025 (ReJNDT )</a><br/><font size="-1"><font color="#aaaaaa"> Special Issue of Research and Review Journal of Nondestructive Testing  (ReJNDT) ISSN 2941-4989 | <a href="/search/docs.php3?showForm=off&amp;MainSource=373&amp;PubVol=&amp;PubNo=" title="more of this"></a></font></font> <tr><td><tr><td><hr/><h1 class="title">Testing Adhesive Bonded joints using Air-coupled Ultrasound</h1>Julian Ehrler<a href="#" onclick="alert('julian.ehrler@ikt.uni-stuttgart.de (may not be valid)'); return false;"><img border="0" hspace="2" src="..//pic/mail.gif" width="16"/></a><a href="/search/docs.php3?AuthorID=41927&amp;showForm=off" target="_parent" title="16 more articles"><img border="0" hspace="2" src="/pic/html2.svg" width="14"/><sup><font class="ssmall">16</font></sup></a>, Marc Kreutzbruck<a href="#" onclick="alert('marc.kreutzbruck@ikt.uni-stuttgart.de (may not be valid)'); return false;"><img border="0" hspace="2" src="..//pic/mail.gif" width="16"/></a><a href="/search/docs.php3?AuthorID=9557&amp;showForm=off" target="_parent" title="187 more articles"><img border="0" hspace="2" src="/pic/html2.svg" width="14"/><sup><font class="ssmall">187</font></sup></a><span style="line-height:1.2;font-size:12px;"><br/>University of Stuttgart<a href="/search/docs.php3?instID=1068&amp;showForm=off" target="_parent" title="377 more articles"><img border="0" hspace="2" src="/pic/html2.svg" width="14"/><sup><font class="ssmall">377</font></sup></a>, Stuttgart , Germany</span><p><div style="line-height:1.4;'"><b>Abstract:</b> Lightweight constructions offer the potential to save weight and thus climate-damaging CO₂ through less accelerated mass. Complex structures and hybrid material combinations are therefore being used in more and more applications. A key aspect of these structures are the joining processes used to connect different components made of various materials. Adhesive bonds offer great advantages here as a material-locking connection compared to ‘classic’ joining methods, as they can be used to join almost any combination of materials. With the adhesives currently available, high-performance materials can be joined together with high strength without additional components such as screws or bolts. In order to ensure safe operation, quality assurance is absolutely essential after production and during operation of such joints. Non-destructive testing methods, such as non-contact air-coupled ultrasonic testing, offer great potential here.
In order to investigate the potential of these methods for defect detection in more detail, different types of defects were introduced on demonstrator components. These are tested using both air-coupled ultrasound and X-ray radiographic testing. It has been shown that pores and insufficiently cured adhesive can be  visualized using airborne ultrasound.</div><br/><p><b>Keywords: </b> <a href="/search/docs.php3?KeywordID=12258">Pores</a> (5), Air-coupled ultrasonics testing (ACUT), <a href="/search/docs.php3?KeywordID=25476">adhesive bonded joints</a> (2), frequency evaluation<br/>*<font class="small"><i>Keywords are freely formed keywords from the authors and thus you may <a href="docs.php3">Search</a> also for similar terms.</i></font><a name="file"></a><br/><br/><b>View:</b> <a href="/article/rejndt/3_2/papers/1281_manuscript.pdf" onclick="ga('send','event','archive','click',' docID=31942 | ReJNDT  | source=docs | link=article/rejndt/3_2/papers/1281_manuscript.pdf')" target="_blank"><img border="0" src="/pic/PDF.svg" title="0.7MB | id=31942 " width="30"/> </a> <hr/><a href="/forum/post.php?forenID=0&amp;post=1&amp;DocID=31942&amp;DocGroup=1&amp;docTitle=Testing Adhesive Bonded joints using Air-coupled Ultrasound" target="_parent" title="Comments or Questions?"><span style="padding-left: 2px;cursor: hand;color:#ffffff;background-color:#477189;font-size:13px; margin: 3px; padding: 3px;border-radius:4px"><img border="0" src="/pic/forum.png"/>Comments or Questions?</span></a><br/><br/><b>Share:</b><dd>
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</dd><b>Cite</b>:<dd>Ehrler, J., &amp; Kreutzbruck, M. (2025). Testing Adhesive Bonded joints using Air-coupled Ultrasound. Selected Papers from the DGZfP Annual Conference 2025. <i>Research and Review Journal of Nondestructive Testing</i> . https://doi.org/10.58286/31942</dd><b>Copyright</b>:<dd>©2025 The Authors under License CC-BY-4.0</dd><p><b>Published:</b> 1 Nov 2025 </p><tr><td><table><tr><td colspan="2" style="border-top:1px #aaaaaa solid; border-bottom: 1px solid #eeeeee; background-color:#f8f8f8;" valign="top">More from "<b>Julian Ehrler</b>" (5 of 15)<tr><td nowrap="" valign="top">2026-01 <td valign="top"><a href="/search/docs.php3?id=32423">Frequenzauswertung bei der Luftultraschallprüfung von Klebverbindungen</a> </td></td></tr></td><tr><td nowrap="" valign="top">2025-06 <td valign="top"><a href="/search/docs.php3?id=31236">Untersuchung von mikromechanischen Schädigungsmechanismen in amorphen Thermoplasten mittels nichtlinearem Ultraschall</a> </td></td></tr></tr></table></td><tr><td nowrap="" valign="top">2025-06 <td valign="top"><a href="/search/docs.php3?id=31240">Charakterisierung der Strömungen in der Extrusionseinheit von FFF-Druckern mittels X-ray Particle Tracking Velocimetry</a> </td></td></tr></tr></p></p></td><tr><td nowrap="" valign="top">2025-02 <td valign="top"><a href="/search/docs.php3?id=30768">X-Ray imaging method for in-situ study of particle-laden flows</a> </td></td></tr></tr></td><tr><td nowrap="" valign="top">2024-06 <td valign="top"><a href="/search/docs.php3?id=29921">Development of an Infrared Marker based Encoder System as a Non-Contact Positioning System for Ultrasonic Probes</a> </td></td></tr></tr></td><tr><td>...<td align="right" valign="top"><img border="0" src="/pic/Articles.svg" width="20"/> <a href="/search/docs.php3?showForm=OFF&amp;MainSource=-1&amp;AuthorID=41927">All 15 Details &gt;</a><tr><td colspan="2" valign="top"><b>Co-Authored mostly with: </b><span style="white-space: nowrap;"><a href="/search/docs.php3?AuthorID=41927&amp;restrict=authors&amp;searchmode=Phrase&amp;SearchDocs=Kreutzbruck" title=" Marc Kreutzbruck "><img border="0" hspace="2" src="/pic/html2.svg" width="14"/>M. 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