About this Abstract |
Meeting |
2024 TMS Annual Meeting & Exhibition
|
Symposium
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Dynamic Behavior of Materials X
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Presentation Title |
Designing Additively Manufactured Lattice Structures to Withstand Uniaxial Short Temporal Width Impulsive Loads Without Yielding |
Author(s) |
Brandon Zimmerman, Claudio Santiago, David A. Quint, Alison M. Saunders, Jonathan Lind, Eric B. Herbold, Mukul Kumar |
On-Site Speaker (Planned) |
Brandon Zimmerman |
Abstract Scope |
Owing to their ability to provide tunable mechanical responses, additively manufactured lattice materials are frequently studied to elucidate their response to static and dynamic loads. In isolation, dynamic loads are typically ameliorated by crushing of the lattice, which provides excellent energy-absorption, while static loads are supported with unit cells sufficiently far away from the onset of buckling or yielding. However, in statically-loaded structures also enduring dynamic loading events, the superposed impulses must be withstood without leveraging plastic deformation and compaction. For a class of impulse shapes associated with laser shocks, our key findings show that the pulses can be attenuated by adding thin solid skins covering the lattice, and optimal solutions can be found rapidly with hydrocodes by applying sequential one-dimensional optimization following the direction of the wave propagating through the lattice. Experimental results from laser pressure drive experiments on lattices of varying relative density will be presented and analyzed.
This work was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under contract DE- AC52-07NA27344. Lawrence Livermore National Security, LLC |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Mechanical Properties, Characterization |