|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Advanced Thermo-mechanical Characterization of Materials with Special Emphasis on In Situ Techniques
||Probing the Dynamic Response of Ordered Lattice Materials
||J. Lind, J. Hawreliak, B. Maddox, M. Barham, M. Messner, B. Jensen, N. Barton, M. Kumar
|On-Site Speaker (Planned)
Additive manufacturing has opened up the possibility of designing and creating lattice structures that were previously not possible. Their remarkable strength-to-weight scaling has garnered much interest, but one must ask if their strength, which depends uniquely on their geometric and topological character, still holds when deformed dynamically? Taking advantage of the Dynamic Compression Sector at the Advanced Photon Source, we performed gas gun experiments combined with x-ray phase contrast imaging on additively manufactured polymer lattice and foam structures. With micron spatial and 100ns temporal resolution, the local deformation characteristics can be extracted by tracking nodal displacements within the material. Properties such as local ligament strain, maximum supported strain, compaction behavior, and elastic wave evolution can be extracted. We will discuss on-going comparison of results with direct numerical simulations. This work was performed under the auspices of the US Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344.
||Planned: Supplemental Proceedings volume