About this Abstract |
Meeting |
2021 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2021)
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Symposium
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Applications
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Presentation Title |
Shock Impact Response and Simulation of Lattice Structures |
Author(s) |
Bradley Howell Jared, David Damm, Shawn Stacy, David Saiz, David Moore, John Carpenter, David Jones, Manyilibo Matthews, Jonathan Lind, Jenny Wang |
On-Site Speaker (Planned) |
Bradley Howell Jared |
Abstract Scope |
Engineered lattice structures represent a compelling, complex geometrical hierarchy enabled through additive manufacturing. While researchers have extensively explored these structures for quasi-static and elastic load environments, the presented work is focused on material and mechanical performance under dynamic compression. Structures were designed using octet and pyramidal cell architectures and then fabricated from stainless steel and titanium alloys using laser-powder bed fusion. Forward ballistic plate-impact experiments were performed using a light gas gun at impact velocities from 0.25 to 1 km/s, generating pressures from 4.6 to 19.5 GPa. Computed tomography was performed on the lattice samples both before and after shock impact to quantify material and structural defects. Using the exact impact conditions, multiple shock physics hydrocodes were used to simulate the experiments. Experimental and simulation results, and their agreement, will be discussed and provide motivation for future research. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |