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8 results on '"Tagscherer, Nevine"'

1. Interdisziplinäre mechatronische Betrachtung der großdimensionierten, kohlenfaserverstärkten und extrusionsbasierten additiven Fertigung

Author

Tagscherer, Nevine, Drechsler, Klaus (Prof. Dr.), and Osswald, Tim A. (Prof. Dr.)

Subjects
Ingenieurwissenschaften, ddc:670, Industrielle Fertigung, ddc:620, Additive Manufacturing, Composites, Mechatronics, Polymers, Thermoplastics, Carbon, Additive Fertigung, Verbundwerkstoffe, Mechatronik, Polymere, Thermoplaste, Kohlenstoff
Abstract

The research gap between small-scale extrusion additive manufacturing (EAM) and common thick-walled large-scale approaches is addressed through the development of a Freeform Extrusion Additive Manufacturing process. It incorporates complex thin-walled composite structures, as in injection molding, into large additive build volumes. The process is further developed in all mechatronic disciplines, including process and material characterization and optimization, electrical improvements and target-oriented approaches to software technology. Die Forschungslücke zwischen der additiven Fertigung durch Extrusion in kleinem Maßstab (EAM) und den verbreiteten dickwandigen großtechnischen Ansätzen wird durch die Entwicklung eines Verfahrens zur additiven Fertigung durch Freiform-Extrusion behandelt. Dabei werden komplexe dünnwandige Verbundwerkstoffstrukturen wie beim Spritzgießen in große additiv gefertigte Volumen integriert. Der Prozess wird in allen mechatronischen Disziplinen weiterentwickelt, einschließlich Prozess- und Materialcharakterisierung und -optimierung, elektrische Verbesserungen und zielgerichtete Ansätze für die Softwaretechnologie.

Published
2023

2. Interdisciplinary Mechatronic Consideration of Large-Scale Carbon Fiber Reinforced Extrusion Additive Manufacturing

Author

Drechsler, Klaus (Prof. Dr.), Drechsler, Klaus (Prof. Dr.);Osswald, Tim A. (Prof. Dr.), Tagscherer, Nevine, Drechsler, Klaus (Prof. Dr.), Drechsler, Klaus (Prof. Dr.);Osswald, Tim A. (Prof. Dr.), and Tagscherer, Nevine

Abstract

The research gap between small-scale extrusion additive manufacturing (EAM) and common thick-walled large-scale approaches is addressed through the development of a Freeform Extrusion Additive Manufacturing process. It incorporates complex thin-walled composite structures, as in injection molding, into large additive build volumes. The process is further developed in all mechatronic disciplines, including process and material characterization and optimization, electrical improvements and target-oriented approaches to software technology., Die Forschungslücke zwischen der additiven Fertigung durch Extrusion in kleinem Maßstab (EAM) und den verbreiteten dickwandigen großtechnischen Ansätzen wird durch die Entwicklung eines Verfahrens zur additiven Fertigung durch Freiform-Extrusion behandelt. Dabei werden komplexe dünnwandige Verbundwerkstoffstrukturen wie beim Spritzgießen in große additiv gefertigte Volumen integriert. Der Prozess wird in allen mechatronischen Disziplinen weiterentwickelt, einschließlich Prozess- und Materialcharakterisierung und -optimierung, elektrische Verbesserungen und zielgerichtete Ansätze für die Softwaretechnologie.

Published
2023

8. Interlaminar strength in large‐scale additive manufacturing of slow crystallizing polyaryletherketone carbon composites.

Author

Consul, Patrick, Chaplin, Adam, Tagscherer, Nevine, Zaremba, Swen, and Drechsler, Klaus

Subjects
CARBON composites, INDUSTRIAL chemistry, CRYSTALLIZATION kinetics, FLEXURAL strength, MANUFACTURING processes, CRYSTALLIZATION, EXTRUSION process equipment, DENTAL cements
Abstract

Fusion bonding theory is applied to the additive manufacturing process to predict the strength developed across the interface between the deposited layers in material extrusion based large‐scale additive manufacturing. Relaxation times were determined through rheology investigations of the neat polymers and were extrapolated across the entire process temperature range to estimate the required welding times for optimal bond formation. For the calculation of bond formation during cooling from the melt, the semicrystalline polyaryletherketone is considered amorphous until the onset of crystallization which is determined by recreating the process thermal history in DSC measurements. A significant improvement in bond development during additive manufacturing is achieved through the use of specifically designed polymers with slower crystallization kinetics. Both in small‐scale additive manufacturing, achieving full bonding, and in large‐scale additive manufacturing, they achieve significantly higher interlaminar strength than the reference material, validated by three‐point bending. A very good match between the estimated degree of bonding and the tested strength of upright printed specimens in three‐point bending was found. While the fusion bonding model calculates a degree of bonding of 42.07%, mechanical testing showed 42.54% of the bulk flexural strength. The study outlines a procedure to evaluate materials for additive manufacturing by material extrusion based on small material samples to shorten and improve the process development. © 2020 The Authors. Polymer International published by John Wiley & Sons Ltd on behalf of Society of Industrial Chemistry [ABSTRACT FROM AUTHOR]

Published
2021
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