| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Structure-Property Relationships of Bulk Metallic Glasses
|
| Presentation Title |
Identifying the Defects in Amorphous Solids that Generate Non-affine Displacement Fields in Response to Globally Applied Shear |
| Author(s) |
Evan Willmarth, Weiwei Jin, Dong Wang, Mark D Shattuck, Corey S O'Hern |
| On-Site Speaker (Planned) |
Evan Willmarth |
| Abstract Scope |
The mechanical response of amorphous solids to athermal, quasistatic shear is characterized by stress-strain curves that contain short elastic segments separated by discontinuous stress drops. Previous studies have shown that large collective particle rearrangements occur during these stress drops. In some cases, the non-affine displacement field caused by a stress drop contains a single, noisy quadrupolar structure, but in other cases, the non-affine displacement fields that occur during stress drops do not resemble quadrupoles. The aim of this work is to determine a basis set that can describe the complex displacement fields that occur during stress drops. To do this, we apply Eshelby’s equivalence principle to triangle subunits within a hexagonal lattice of springs to obtain a local eigenstrain given a globally applied strain. We can generate the observed non-affine displacement fields in granular packings from a linear combination of these eigenstrain perturbations applied to triangle subunits. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Modeling and Simulation, Computational Materials Science & Engineering |