About this Abstract |
Meeting |
2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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Symposium
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2025 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2025)
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Presentation Title |
Photoelastic Visualization of Residual Stresses in PLA After Interlayer Shot Peening During Fused Filament Fabrication |
Author(s) |
Elena Parial, Christian Saul Sosa Rodriguez, Noah Brinker, Noah Stenberg, Lila Johnson, Melanie Charron, Michael P. Sealy |
On-Site Speaker (Planned) |
Christian Saul Sosa Rodriguez |
Abstract Scope |
The ability to map high resolution residual stress fields from hybrid additive manufacturing is challenging. In this study, a hybrid method combining fused filament fabrication (FFF) with interlayer shot peening was employed in transparent polylactic acid (PLA) to visualize compressive residual stress fields. Residual stress is influenced both by the thermal conditions during layer deposition and the mechanical effects of shot peening. Specifically, understanding the influence of interchanging printing and peened layers on the internal stress distribution in polymers remains largely unexplored. This study addresses that gap by applying photoelastic stress analysis to visualize and compare birefringence patterns in PLA with multiple peened layers. Analyzing changes in birefringent intensity and distribution provides insight into how process modifications affect internal stress development. These findings highlight the potential of interlayer shot peening to tailor residual stress profiles and enhance the performance and reliability of polymer-based AM components. |
Proceedings Inclusion? |
Planned: Post-meeting proceedings |