article published Daniel Köhler author Robert Kupfer author Juliane Troschitz author Maik Gude author 157 department 43 department TRR 285: TRR 285 project TRR 285 - C: TRR 285 - Project Area C project TRR 285 – C04: TRR 285 - Subproject C04 project <jats:p>In lightweight design, clinching is a cost-efficient solution as the joint is created through localized cold-forming of the joining parts. A clinch point’s quality is usually assessed using ex-situ destructive testing methods. These, however, are unable to detect phenomena immediately during the joining process. For instance, elastic deformations reverse and cracks close after unloading. In-situ methods such as the force-displacement evaluation are used to control a clinching process, though deviations in the clinch point geometry cannot be derived with this method. To overcome these limitations, the clinching process can be investigated using in-situ computed tomography (in-situ CT). However, a clinching tool made of steel would cause strong artefacts and a high attenuation in the CT measurement, reducing the significance of this method. Additionally, when joining parts of the same material, the sheet-sheet interface is hardly detectable. This work aims at identifying, firstly, tool materials that allow artefact-reduced CT measurements during clinching, and, secondly, radiopaque materials that can be applied between the joining parts to enhance the detectability of the sheet-sheet interface. Therefore, both CT-suitable tool materials and radiopaque materials are selected and experimentally investigated. In the clinching process, two aluminium sheets with radiopaque material in between are clinched in a single-step (rotationally symmetric joint without cut section). It is shown that e.g. silicon nitride is suited as tool material and a tin layer is suitable to enhance the detectability of the sheet-sheet interface.</jats:p> University of Liege2021 fre 10.25518/esaform21.2781 Köhler D, Kupfer R, Troschitz J, Gude M. Clinching in In-situ CT – Experimental Study on Suitable Tool Materials. <i>ESAFORM 2021</i>. Published online 2021. doi:<a href="https://doi.org/10.25518/esaform21.2781">10.25518/esaform21.2781</a> D. Köhler, R. Kupfer, J. Troschitz, and M. Gude, “Clinching in In-situ CT – Experimental Study on Suitable Tool Materials,” <i>ESAFORM 2021</i>, 2021, doi: <a href="https://doi.org/10.25518/esaform21.2781">10.25518/esaform21.2781</a>. Köhler, Daniel, Robert Kupfer, Juliane Troschitz, and Maik Gude. “Clinching in In-situ CT – Experimental Study on Suitable Tool Materials.” <i>ESAFORM 2021</i>, 2021. <a href="https://doi.org/10.25518/esaform21.2781">https://doi.org/10.25518/esaform21.2781</a>. Köhler, D., Kupfer, R., Troschitz, J., &#38; Gude, M. (2021). Clinching in In-situ CT – Experimental Study on Suitable Tool Materials. <i>ESAFORM 2021</i>. <a href="https://doi.org/10.25518/esaform21.2781">https://doi.org/10.25518/esaform21.2781</a> @article{Köhler_Kupfer_Troschitz_Gude_2021, title={Clinching in In-situ CT – Experimental Study on Suitable Tool Materials}, DOI={<a href="https://doi.org/10.25518/esaform21.2781">10.25518/esaform21.2781</a>}, journal={ESAFORM 2021}, publisher={University of Liege}, author={Köhler, Daniel and Kupfer, Robert and Troschitz, Juliane and Gude, Maik}, year={2021} } Köhler, Daniel, et al. “Clinching in In-situ CT – Experimental Study on Suitable Tool Materials.” <i>ESAFORM 2021</i>, University of Liege, 2021, doi:<a href="https://doi.org/10.25518/esaform21.2781">10.25518/esaform21.2781</a>. D. Köhler, R. Kupfer, J. Troschitz, M. Gude, ESAFORM 2021 (2021). 512012024-02-06T15:05:58Z2025-06-02T20:20:21Z