|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Advanced Thermo-mechanical Characterization of Materials with Special Emphasis on In Situ Techniques
||Understanding the Local Ligament-level Deformation Response in Unit Cell Lattices
||H. Carlton, J. Lind, N. Volkoff-Shoemaker, M. Messner, H. Barnard, N. Barton, M. Kumar
|On-Site Speaker (Planned)
Recent interest has focused on lattice structures with remarkable strength-to-weight ratio that can be produced with metals by the additive manufacturing process. While much attention is devoted to the performance of the underlying base material, non-uniform partitioning of stress is common in these structures and varies depending on the geometry and topology of the structure itself. This study reports on high resolution mapping of the heterogeneous structural response of single unit cells during macro-scale deformation. Two different types of structures were evaluated using compression tests coupled with in-situ synchrotron micro-tomography. Computational modeling efforts were performed taking into account defects and evaluating micro-strain responses as well as capturing the load-displacement response. Local strain measures, obtained from the in-situ tomography, were also captured and compared well with the model. 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