About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing Modeling, Simulation and Machine Learning
|
Presentation Title |
Numerical Analysis of the Flow and Orientation of Reinforcements in a Polymer Matrix During Flow Through a Nozzle In Direct Ink Writing Process |
Author(s) |
Rajat Mishra, Swasti Chakrabarty |
On-Site Speaker (Planned) |
Rajat Mishra |
Abstract Scope |
Enhancing composite materials via aligned reinforcements in extrusion-based additive manufacturing (AM) is crucial for engineering applications. This study employs coupled Computational Fluid Dynamics (CFD) and Discrete Element Method (DEM) to investigate the flow of graphite-reinforced PVA polymer matrix through a nozzle, a challenging process to achieve experimentally. Key forces—drag, pressure gradient, and virtual mass—are analyzed for their impact on reinforcement alignment. Non-linear regression quantifies the effects of these forces, with orientation angle as the output parameter and input parameters including nozzle diameter, reinforcement aspect ratio, volume flow rate, polymer viscosity, and reinforcement concentration. The resulting regression equation highlights significant terms influencing alignment. Additionally, nozzle rotation is proposed to address clogging, proving effective in enhancing reinforcement alignment efficiency. This research provides insights into composite material production, optimizing reinforcement alignment in polymer matrices, and paving the way for high-performance composite materials. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Composites, Computational Materials Science & Engineering |