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DIGITAL LIBRARY: CAMX 2023 | ATLANTA, GA | OCTOBER 30-NOVEMBER 2

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Investigation of In-plane and Out-of-Plane Deformation Mechanisms in Composites Additive Manufacturing.

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Title: Investigation of In-plane and Out-of-Plane Deformation Mechanisms in Composites Additive Manufacturing.

Authors: Eduardo Barocio, Pasita Pibulchinda, Garam Kim, R. Byron Pipes

DOI: 10.33599/nasampe/c.23.0060

Abstract: Significant improvements to additive manufacturing equipment and the implementation of fiber reinforced thermoplastics have enabled printing geometries in the scale of multiple meters in length. Applications including trimming fixtures, monuments, non-structural vehicle components, and tooling for compression molding, autoclave, and vacuum assisted resin transfer molding have been successfully demonstrated. However, the non-isothermal nature of the process and the anisotropy of the printed materials lead to stresses that can result into in-plane and out-of-plane deformation during printing and upon release of the printed part from the substrate. Stresses can also lead to debonding of the printed part from the substrate during the printing process. A systematic virtual investigation carried out with Additive3D of the mechanisms causing in-plane and out-of-plane deformation in printed composites is presented. The virtual study considered the effects of layer time, stacking sequence and the anisotropy of the printed material. Further, these process parameters were investigated with two geometries, one that is susceptible to in-plane deformation and a second one that is susceptible to out-of-plane deformation. Additive3D is a comprehensive physics-based simulation framework for extrusion deposition additive manufacturing that incorporates anisotropic phenomena such as heat transfer, thermoviscoelasticity, and shrinkage as well as polymer melting and crystallization kinetics. The results demonstrated the benefits of printing curved geometries from the inside to the outside to reduce in-plane deformation as well as the effects of layer time on the out-of-plane deformation. Finally, recommendations to reduce both in-plane and out-of-plane deformation in printed geometries were provided based on the results of the simulation study and a fundamental description of the mechanism that drive deformation.

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Conference: CAMX 2023

Publication Date: 2023/10/30

SKU: TP23-0000000060

Pages: 13

Price: $26.00

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