About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Poster Session
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Presentation Title |
Variable Hysteresis of Pantographic Lattices |
Author(s) |
Zachary Romanick, Kaitlynn M. Conway, Garrett J Pataky |
On-Site Speaker (Planned) |
Zachary Romanick |
Abstract Scope |
Pantographic lattices are comprised of continuous beam ligaments with traditionally zero or low compliant connections. High contrast micro-properties have been shown to produce the ability to undergo very large macro-deformations while at the local beam connections the material remains in the elastic regime. This is a unique property impossible with the rigid connections in lattice materials. Altering the local beam connections provides the opportunity to achieve programmable properties. Deviating from the commonly desired frictionless connections, this study used spacers to impart local changes in the connections to study the effect on cyclic hysteresis. Due to their thin aspect ratio, beams tend to translate out of plane during large displacements, an effect of Poisson’s ratio, thus the spacers proved to resist this movement. The addition of spacers decreased the load on the lattice at the same displacement by 21% and increased the hysteresis of the lattice by 5%. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |