About this Abstract |
Meeting |
12th International Conference on Magnesium Alloys and their Applications (Mg2021)
|
Symposium
|
12th International Conference on Magnesium Alloys and their Applications (Mg 2021)
|
Presentation Title |
Mesoscale Modeling of Kinks
|
Author(s) |
Pierluigi Cesana |
On-Site Speaker (Planned) |
Pierluigi Cesana |
Abstract Scope |
Mg-based long-period stacking ordered (LPSO) alloys have attracted considerable attention over recent years due to their high strength, corrosion resistance and ignition temperature. Superior mechanical properties of LPSO depend strongly on a complex plastification pattern under loading and, in particular, on the formation of kinks, a mechanism that is yet to date largely elusive. In this talk we present recent advances in the modeling of kinks in the framework of non-linear elasticity. Our model consists of a Landau-type energy that is invariant under the full symmetry group of 2D (hexagonal or square) lattice. We perform FEM computations for rectangular (single-crystal) domains. We find the plastification pattern depends on the lattice symmetry and domain aspect ratio. Our results are in good agreement with a number of experimental observations of kinks both in LPSO structures and in single-crystals. This is a collaboration with G. Zanzotto (Padua) and E. Arbib (Milan). |
Proceedings Inclusion? |
Planned: At-meeting proceedings |