Back to Search
Start Over
On measuring the fracture energy of model metallic glasses.
- Source :
-
Journal of Applied Physics . 2018, Vol. 124 Issue 3, pN.PAG-N.PAG. 8p. 1 Diagram, 2 Charts, 7 Graphs. - Publication Year :
- 2018
-
Abstract
- We report a heuristic approach to measure the fracture energy of model metallic glasses using molecular dynamics simulation. Specifically, we adopted the Rivlin-Thomas method, simplified by Suo et al., which is applicable even with the presence of plastic flow. We further modified the testing condition with semi-rigid holders in our molecular simulations, to avoid unintended fracture near the holders. This method was first applied in measuring the fracture energy of a brittle model glass, which agrees well with direct K I C and J I C measurements (both measurements are independent of the crack size). Furthermore, the fracture energy values of a family of model metallic glasses, ranging from brittle to ductile (BTD), were measured. The Poisson's ratio-fracture energy (v-G, or v-G/2γ, normalized by the surface energy) relation obtained here exhibits a BTD transition at a critical Poisson's ratio of 0.31–0.32, consistent with experimental results. [ABSTRACT FROM AUTHOR]
- Subjects :
- *FRACTURE mechanics
*METALLIC glasses
*FORCE & energy
*DUCTILITY
*BRITTLE materials
Subjects
Details
- Language :
- English
- ISSN :
- 00218979
- Volume :
- 124
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Journal of Applied Physics
- Publication Type :
- Academic Journal
- Accession number :
- 130857328
- Full Text :
- https://doi.org/10.1063/1.5037352