Work

The elastic–plastic transition in nanoparticle collisions

Year: 2015

Type: article

Abstract: When nanoparticles (NPs) collide with low velocities, they interact elastically in the sense that--besides their fusion caused by their mutual van-der-Waals attraction--no defects are generated. We investigate the minimum velocity, vc, necessary for generating defects and inducing plasticity in the NP. The determination of this elastic-plastic threshold is of prime importance for modeling the behavior of granular matter. Using the generic Lennard-Jones interaction potential, we find vc to increase strongly with decreasing radius. Current models do not agree with our simulations, but we provide a model based on dislocation emission in the contact zone that quantitatively describes the size dependence of the elastic-plastic transition.

Source: Physical Chemistry Chemical Physics

DOI: 10.1039/c5cp05150a

Authors: Emmanuel N. Millán, Diego R. Tramontina, Herbert M. Urbassek, Eduardo M. Bringa

Institutions: Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad Nacional de Cuyo, University of Kaiserslautern

Language: English

Topic: Granular flow and fluidized beds

Subfield: Computational Mechanics

Field: Engineering

Domain: Physical Sciences

Open Access status: hybrid

Funders: Deutsche Forschungsgemeinschaft, Consejo Nacional de Investigaciones Científicas y Técnicas

Award: G2623469437