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Material and damage behaviour of 3D printed PA12 under cyclic loading

  • The material and damage behaviour of additively manufactured polyamide 12 (PA12) under dynamic loading was characterized by cyclic tests and microstructure analysis. The results were used to develop a numerical material and damage model. In a recent study, it was shown that the material and damage behaviour of 3D printed PA12 under quasistatic loading is simulated in a realistic way by coupling the material model by Chaboche and the damage model by Gurson-Tvergaard-Needleman (GTN). Using microscopy, X-ray refraction, and computed tomography, a porosity of about 5% was evaluated. These results served as a starting point for the present work. For the dynamic load, both the previously used Chaboche model and the GTN model were extended. Furthermore, the temperature was measured during the experiment and the self-heating effect was observed. Therefore, a temperaturedependent material parameters for the simulation were introduced. Considering the results of mechanical experiments,The material and damage behaviour of additively manufactured polyamide 12 (PA12) under dynamic loading was characterized by cyclic tests and microstructure analysis. The results were used to develop a numerical material and damage model. In a recent study, it was shown that the material and damage behaviour of 3D printed PA12 under quasistatic loading is simulated in a realistic way by coupling the material model by Chaboche and the damage model by Gurson-Tvergaard-Needleman (GTN). Using microscopy, X-ray refraction, and computed tomography, a porosity of about 5% was evaluated. These results served as a starting point for the present work. For the dynamic load, both the previously used Chaboche model and the GTN model were extended. Furthermore, the temperature was measured during the experiment and the self-heating effect was observed. Therefore, a temperaturedependent material parameters for the simulation were introduced. Considering the results of mechanical experiments, microstructural investigations, and self-heating effects, a good agreement between Experiment and numerical simulation could be achieved.zeige mehrzeige weniger

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Metadaten
Autor*innen:D. Schob
Koautor*innen:I. Sagradov, R. Roszak, H. Sparr, R. Franke, M. Ziegenhorn, Andreas Kupsch, Fabien Léonard, Bernd R. Müller, Giovanni Bruno
Dokumenttyp:Vortrag
Veröffentlichungsform:Präsentation
Sprache:Englisch
Jahr der Erstveröffentlichung:2019
Organisationseinheit der BAM:8 Zerstörungsfreie Prüfung
8 Zerstörungsfreie Prüfung / 8.5 Röntgenbildgebung
DDC-Klassifikation:Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tätigkeiten
Freie Schlagwörter:Chaboche model; Computed tomography; GTN model; Polyamide 12; Selective Laser Sintering (SLS); Viscoplasticity; X-ray refraction
Themenfelder/Aktivitätsfelder der BAM:Material
Material / Degradation von Werkstoffen
Veranstaltung:VI International Conference on Computational Modeling of Fracture and Failure of Materials and Structures
Veranstaltungsort:Brunswick, Germany
Beginndatum der Veranstaltung:12.06.2019
Enddatum der Veranstaltung:14.06.2019
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:27.06.2019
Referierte Publikation:Nein
Eingeladener Vortrag:Nein
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