About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Deformation Mechanisms, Microstructure Evolution, and Mechanical Properties of Nanoscale Materials
|
Presentation Title |
Modelling the Mechanical Properties of Nanoporous Metallic Structures |
Author(s) |
Santhosh Mathesan, Zhi Chen, Ben Engelman, Dan Mordehai |
On-Site Speaker (Planned) |
Dan Mordehai |
Abstract Scope |
Nanoporous metals are attracting increasing interest to various emerging applications and in this talk I will present our recent studies on how both material properties and topological features of porous structures are related to mechanical properties. Using MD simulations of nanoporous Au nanopillars, we show that the stress-strain curves demonstrate an initial non-linear regime, followed by a stress plateau and a strong hardening stage. We developed a hybrid skeletonization/dislocation-analyses tool to discuss how the different features of the stress-strain curve depend on the ligament average diameter and the topology of the nanoporous structure. We extend the discussion to compression of spherical nanoporous Au nanoparticles, which can also be fabricated experimentally, and we emphasize on the importance of local densification. Finally, we go up the scales using finite elements simulations, to propose universal laws for the mechanical properties of porous lattice architectured structures in a large range of material properties. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Modeling and Simulation, Computational Materials Science & Engineering |