Deformation of an amorphous polymer during the fused-filament-fabrication method for additive manufacturing
By C. McIlroy, P. Olmsted. 2016
172 citations recorded by the source corpus.
Three-dimensional (3D) printing is rapidly becoming an effective means of prototyping and creating custom consumer goods. The most common method for printing a polymer melt is fused filament fabrication (FFF) and involves extrusion of a thermoplastic material through a heated nozzle; the material is then built up layer-by-layer to fabricate a 3D object. Under typical printing conditions, the melt experiences high strain rates within the FFF nozzle, which are able to significantly stretch and orient the polymer molecules. In this paper, we model the deformation of an amorphous polymer melt during the extrusion process, where the fluid must make a 90° turn. The melt is described by a modified version of the Rolie–Poly model, which allows for flow-induced changes in the entanglement density. The complex polymer configurations in the cross section of a printed layer are quantified and visualized. The deposition process involving the corner flow geometry dominates the deformation and significantly disentangles the melt.
Subfields: Automotive Engineering, Biomedical Engineering, Polymers and Plastics
View Paper: https://www.semanticscholar.org/paper/057764260ee2e200e74057c2ab3d134ad84a796a
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In Automotive Engineering
In Biomedical Engineering
In Polymers and Plastics
Citations in the corpus
- Advanced robotics and additive manufacturing of composites: towards a new era in Industry 4.0 (2021, methodology): “The 3D object is constructed by XY-plane nozzle movement that forms a prescribed pattern and z-direction movement for layer buildup.([255]) A prototype FDM printing device is schematically displayed in Fig.”
- Experimental validation of a numerical model for the strand shape in material extrusion additive manufacturing (2018, background): “The deformation and relaxation of the polymer chains during the material deposition was investigated by McIlroy and Olmsted [52], who assumed that the deposited strand has an elliptic cross-section.”
- Numerical modeling of the strand deposition flow in extrusion-based additive manufacturing (2018, unknown): “McIlroy and Olmsted [31] modelled the disentanglement of an amorphous polymer during the deposition of the material, assuming a smooth ansatz function of the deposition flow which neglects secondary flows.”
- Disentanglement effects on welding behaviour of polymer melts during the fused-filament-fabrication method for additive manufacturing (2017, methodology): “Furthermore, due to the nature of the deposition flow [20] polymers on either side of the interface reside in different deformation environments.”