About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Symposium
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2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
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Presentation Title |
Analysis of Fiber Attrition and Mechanical Performance in Large-Format Additive Manufacturing of Long-Fiber Reinforced Polymer Composites |
Author(s) |
Andrew Rhodes, Tyler Smith, Christian Sharpe, Vlastimil Kunc, Chad Duty, John Lindahl |
On-Site Speaker (Planned) |
Andrew Rhodes |
Abstract Scope |
Preserving the initial fiber length of fiber-reinforced thermoplastics during large-format additive manufacturing is of significant interest since the residual fiber length influences the mechanical properties of the final part. Currently, the attrition of long fiber reinforcement during large-format, single screw extrusion additive manufacturing is not well understood. This study evaluates the relationship between printing speed, the final fiber length, and resultant mechanical properties for pelletized TPU feedstock containing glass fiber of lengths 4 mm, 6mm, and 12 mm. Samples were printed at several processing speeds and subjected to fiber length analysis and tensile testing. Fiber length analysis was performed using the epoxy-plug method, where an improved down-sampling method was implemented for increased repeatability. This study will improve understanding in the choice of machine design, material selection, and processing parameters for optimal mechanical properties. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |