About this Abstract |
| Meeting |
Additive Manufacturing Benchmarks 2022 (AM-Bench 2022)
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| Symposium
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Additive Manufacturing Benchmarks 2022 (AM-Bench 2022)
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| Presentation Title |
Investigating the Strength of Individual Welds of Polycarbonate Made with Fused Filament Fabrication |
| Author(s) |
Ojaswi Agarwal, Zheliang Wang , Lichen Fang, Sung Hoon Hoon Kang, Jonathan Seppala, Thao Vicky D. Nguyen, Kevin J. Hemker |
| On-Site Speaker (Planned) |
Ojaswi Agarwal |
| Abstract Scope |
In Fused Filament Fabrication (FFF), the reduced and anisotropic properties are attributed to the welding between layers. Welds have been reported to be substantially weaker than the bulk material [1-3] and serve as stress concentrators where failure localizes [4]. We develop three complementary tests to probe the strength of individual inter-road polymer welds. The three tests, combined with an in-situ characterization of the weld thermal history and imaging of the weld geometry, result in a holistic understanding of the polymer's behavior at the weld. The tests are the trouser tear test, a mixed-mode peel test, and a razorblade induced fracture test, all probing a single weld. We find the measured strength does depend on the local thermal history, but there is a strong influence from the size of the grooves. The grooves introduce a stress concentration that influences fracture behavior and can change the observed strength, independent of thermal history.
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| Proceedings Inclusion? |
Undecided |