| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Response of Materials Investigated Through Novel In-Situ Experiments and Modeling
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| Presentation Title |
Influence of Lattice Metamaterial Topology on Mechanical Response From Quasistatic to Shock Compaction Regimes |
| Author(s) |
Brandon Zimmerman, Eric Herbold, Mukul Kumar, Jonathan Lind |
| On-Site Speaker (Planned) |
Brandon Zimmerman |
| Abstract Scope |
Additively manufactured lattice materials offer high strength and energy absorption and provide an additional degree of freedom through the selection of the lattice topology. Under quasistatic loading, the unit cell structure can strongly affect the stiffness, yield, and post-yield behavior, but whether and to what degree the effect of lattice topology persists into dynamic loading scenarios, up to the compaction shock regime, has not been established. This work uses LLNL’s ALE3D hydrocode to perform a computational investigation of dynamic loading in multiple lattice types, including the gyroid, octet, Schwarz D, and rhombic dodecahedron, under impact velocities from 100 to 2250 m/s. Shock Hugoniots for each lattice topology are generated and compared, suggesting that above a critical velocity, compacted lattices behave like random foams and distinctions between architectures may not persevere. Numerical results are compared to predictions from 1D shock models informed solely by quasistatic stress-strain curves. LLNL-ABS-866717. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Modeling and Simulation, Additive Manufacturing |