{"title":"Clinching in In-situ CT – Experimental Study on Suitable Tool Materials","_id":"30659","user_id":"68518","citation":{"short":"D. Köhler, R. Kupfer, J. Troschitz, M. Gude, ESAFORM 2021 (2021).","apa":"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>","chicago":"Köhler, D., R. Kupfer, J. Troschitz, and M. 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>.","bibtex":"@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}, author={Köhler, D. and Kupfer, R. and Troschitz, J. and Gude, M.}, year={2021} }","ama":"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>","mla":"Köhler, D., et al. “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>.","ieee":"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>."},"date_created":"2022-03-28T13:39:26Z","status":"public","project":[{"grant_number":"418701707","_id":"130","name":"TRR 285: TRR 285"},{"name":"TRR 285 - C: TRR 285 - Project Area C","_id":"133"},{"name":"TRR 285 – C04: TRR 285 - Subproject C04","_id":"148"}],"year":"2021","author":[{"last_name":"Köhler","full_name":"Köhler, D.","first_name":"D."},{"last_name":"Kupfer","full_name":"Kupfer, R.","first_name":"R."},{"last_name":"Troschitz","full_name":"Troschitz, J.","first_name":"J."},{"first_name":"M.","full_name":"Gude, M.","last_name":"Gude"}],"abstract":[{"text":"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. ","lang":"eng"}],"doi":"10.25518/esaform21.2781","date_updated":"2022-03-29T15:53:46Z","type":"journal_article","publication":"ESAFORM 2021","language":[{"iso":"eng"}]}