{"year":"2026","issue":"3","title":"In-situ CT of Viscoelastic Plastic Materials: A Radiography-Based Lead Time Determination for Composite–Metal Joints at Elevated Temperature","date_created":"2026-03-06T10:19:09Z","publisher":"NDT.net GmbH & Co. KG","file":[{"content_type":"application/pdf","success":1,"relation":"main_file","date_updated":"2026-03-06T10:20:14Z","date_created":"2026-03-06T10:20:14Z","creator":"adargel","file_size":10028899,"file_name":"ict26_Contribution_227.pdf","access_level":"closed","file_id":"64862"}],"abstract":[{"lang":"eng","text":"<jats:p>In-situ computed tomography (CT) experiments on materials with time-dependent mechanical behaviour are affected by relaxationinduced motion, which can lead to image blur and motion-related artefacts if scans are initiated before relaxation-induced motion has subsided. Scan start times are therefore commonly defined based on force relaxation or force-gradient criteria, although these signals do not directly quantify image-relevant specimen motion. In this work, a radiography-based approach is presented to estimate relaxation-induced motion via pixel shifts from projection images acquired prior to CT scans. These projection-based pixel shift estimates of relaxation-induced motion are related to scan-specific image blur observed in the reconstructed volumes. Thereby, a direct link between specimen motion during the scan and CT image quality is established. The method is demonstrated for thermo-mechanically loaded specimens with pronounced temperature-dependent material behaviour, where relaxation-induced motion persists over extended time scales. The results show that projection-based pixel shift estimation provides a physically meaningful and experimentally accessible basis for defining scan start criteria. CT acquisition can be initiated based on an allowable level of relaxation-induced motion, rather than waiting for mechanical equilibrium to be reached. The proposed approach therefore offers a direct, image-related framework for scan timing in in-situ CT experiments on time-dependent materials.</jats:p>"}],"publication":"e-Journal of Nondestructive Testing","language":[{"iso":"eng"}],"ddc":["620"],"intvolume":"        31","citation":{"ieee":"A. Dargel, J. Troschitz, M. Gude, and R. Kupfer, “In-situ CT of Viscoelastic Plastic Materials: A Radiography-Based Lead Time Determination for Composite–Metal Joints at Elevated Temperature,” <i>e-Journal of Nondestructive Testing</i>, vol. 31, no. 3, 2026, doi: <a href=\"https://doi.org/10.58286/32601\">10.58286/32601</a>.","chicago":"Dargel, Alrik, Juliane Troschitz, Maik Gude, and Robert Kupfer. “In-Situ CT of Viscoelastic Plastic Materials: A Radiography-Based Lead Time Determination for Composite–Metal Joints at Elevated Temperature.” <i>E-Journal of Nondestructive Testing</i> 31, no. 3 (2026). <a href=\"https://doi.org/10.58286/32601\">https://doi.org/10.58286/32601</a>.","ama":"Dargel A, Troschitz J, Gude M, Kupfer R. In-situ CT of Viscoelastic Plastic Materials: A Radiography-Based Lead Time Determination for Composite–Metal Joints at Elevated Temperature. <i>e-Journal of Nondestructive Testing</i>. 2026;31(3). doi:<a href=\"https://doi.org/10.58286/32601\">10.58286/32601</a>","short":"A. Dargel, J. Troschitz, M. Gude, R. Kupfer, E-Journal of Nondestructive Testing 31 (2026).","bibtex":"@article{Dargel_Troschitz_Gude_Kupfer_2026, title={In-situ CT of Viscoelastic Plastic Materials: A Radiography-Based Lead Time Determination for Composite–Metal Joints at Elevated Temperature}, volume={31}, DOI={<a href=\"https://doi.org/10.58286/32601\">10.58286/32601</a>}, number={3}, journal={e-Journal of Nondestructive Testing}, publisher={NDT.net GmbH &#38; Co. KG}, author={Dargel, Alrik and Troschitz, Juliane and Gude, Maik and Kupfer, Robert}, year={2026} }","mla":"Dargel, Alrik, et al. “In-Situ CT of Viscoelastic Plastic Materials: A Radiography-Based Lead Time Determination for Composite–Metal Joints at Elevated Temperature.” <i>E-Journal of Nondestructive Testing</i>, vol. 31, no. 3, NDT.net GmbH &#38; Co. KG, 2026, doi:<a href=\"https://doi.org/10.58286/32601\">10.58286/32601</a>.","apa":"Dargel, A., Troschitz, J., Gude, M., &#38; Kupfer, R. (2026). In-situ CT of Viscoelastic Plastic Materials: A Radiography-Based Lead Time Determination for Composite–Metal Joints at Elevated Temperature. <i>E-Journal of Nondestructive Testing</i>, <i>31</i>(3). <a href=\"https://doi.org/10.58286/32601\">https://doi.org/10.58286/32601</a>"},"publication_identifier":{"issn":["1435-4934"]},"has_accepted_license":"1","publication_status":"published","doi":"10.58286/32601","volume":31,"author":[{"full_name":"Dargel, Alrik","last_name":"Dargel","first_name":"Alrik"},{"first_name":"Juliane","full_name":"Troschitz, Juliane","last_name":"Troschitz"},{"first_name":"Maik","full_name":"Gude, Maik","last_name":"Gude"},{"first_name":"Robert","full_name":"Kupfer, Robert","last_name":"Kupfer"}],"date_updated":"2026-03-06T10:22:21Z","status":"public","type":"journal_article","file_date_updated":"2026-03-06T10:20:14Z","user_id":"114764","_id":"64861"}