About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
|
Heterostructured and Gradient Materials (HGM IV): Tailoring Heterogeneity for Superior Properties
|
Presentation Title |
Mechanical Enhancement of Graded Nanoporous Structure |
Author(s) |
Lijie He, Niaz Abdolrahim |
On-Site Speaker (Planned) |
Lijie He |
Abstract Scope |
Inspired by the development of strong and ductile composite and gradient materials over the past decade, here we report the investigation of a graded nanoporous (NP) structure utilizing molecular dynamics simulation. The structure is generated by inducing a cell-size gradient in a Gaussian random field model and have large ligament/pore size toward the core and small ligament/pore size toward the surface. The redistribution of stress and strain under tensile loading is then scrutinized and compared between the functional graded NP structure and a conventional NP structure with constant relative density. It is observed that strong cores result in larger strength, and the ductile surfaces accommodate a considerable amount of plastic strain. As a result, the graded NP structure exhibits excellent strength as well as deformability, and the strain at which the structure starts to fail is significantly larger than the conventional NP structure. |
Proceedings Inclusion? |
Planned: |
Keywords |
Nanotechnology, Computational Materials Science & Engineering, Modeling and Simulation |