About this Abstract |
Meeting |
2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
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Symposium
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2023 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2023)
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Presentation Title |
Ultrasonic Non-destructive Characterization of Anisotropic Additively Manufactured Polymers |
Author(s) |
Akash S. Nivarthi, Michael R. Haberman, Christina J. Naify |
On-Site Speaker (Planned) |
Akash S. Nivarthi |
Abstract Scope |
Ultrasonic nondestructive testing can be used to infer the print settings of additively manufactured (AM) polymers to macroscopic elastic properties. We present a comparison of measurements of angle- and frequency-dependent ultrasonic transmission through AM plates in water tank to model predictions that consider infill properties. The experiment employs a point source ultrasonic source and a synthetic linear array to measure the transmission coefficient of fused deposition-modeled polylactic (PLA) acid plates over various frequencies and incident angles. Measurements are compared to predictions from a finite element (FE) model of the effective stiffness based on assumed infill geometry and PLA material properties paired with a reflection-transmission model for anisotropic elastic plates submerged in a fluid. Minimizing the difference between measured and modeled transmission coefficients by varying FE model inputs provides an improved understanding of the effects of the print settings on the as-built mechanical properties for 3D-printed materials. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |