A molecular-dynamics study of ductile and brittle fracture in model non-crystalline solids
M. L. Falk
Abstract
Molecular-dynamics simulations of fracture in metallic glass-like systems are observed to undergo embrittlement due to a small change in interatomic potential. This change in fracture toughness, however, is not accompanied by a corresponding change in flow stress. Theories of brittle fracture proposed by Freund and Hutchinson indicate that strain rate sensitivity is the controling physical parameter in these cases. A recent theory of viscoplasticity in this class of solids by Falk and Langer further suggests that the change in strain rate sensitivity corresponds to a change in the susceptibility of local shear transformation zones to applied shear stresses. A simple model of these zones is develped in order to quantify the dependence of this sensitivity on the interparticle potential.
Create a lesson
Related papers
Exchange Interactions and Magnon Spectra in bcc Fe(001) Thin Films: A Computational Study
Joanna Marciniak, Wojciech Marciniak, Jorge Luis Briseño-Gómez et al.
Growth-induced trade-off between polarity, electrical isolation, and structural quality in AlN grown on Si(111) by plasma-assisted molecular beam epitaxy
Hossein Yazdani, Nhu Tran, Xin Du et al.
Structural identification in general crystalline systems via Voronoi cell topology
Emanuel A. Lazar, Chris H. Rycroft
Modeling electrodeposition of thin films with compact, dendritic, and random morphologies
Fábio D. A. Aarão Reis, Dung di Caprio, Sidiney G. Alves et al.
A Topological\-Geometrical Descriptor (TGD) for Scalable and Interpretable Modeling of Two\-Dimensional Carbon Networks
Rômulo Uriel Liberal de Oliveira, Raphael Matozo Tromer
High-Frequency Mass Transfer Enabling Over-Limiting Currents in Porous Electrodes
Md Abdul Hamid, Kyle C. Smith