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Predicting the Location of Shear Band Initiation in a Metallic Glass by Fan, Z.; Ma, E.; Falk, M. L. is a scholarly article available to read on EtoBox.

What is Predicting the Location of Shear Band Initiation in a Metallic Glass about?

We report atomistic simulation results which indicate that the location of shear banding in a metallic glass (MG) can be ascertained with reasonably high accuracy solely from the undeformed static structure. Correlation is observed between the location of the initiation of shear bands in a simulated MG and the initial distribution of the density of fertile sites (DFS) for stress-driven shear transformations identified a priori based on a deep learning model devised in our recent work [Fan and Ma, Nat. Commun. 12, 1506 (2021)]. In addition, we demonstrated that one can judge whether a glass is brittle or ductile solely based upon its initial DFS distribution. These validate that shear bands in MG arise from non-linear instabilities, and that the as-quenched glass structure contains inhomogeneities that influence these instabilities. This work also reveals an important subtlety regarding the non-deterministic nature of athermal quasistatic shear simulations.

Author

Fan, Z.; Ma, E.; Falk, M. L.

Published

2022

Language

EN