Breakdown of Self-Similar Hardening Behavior in Au Nanopillar MicroplasticityDOI: 10.1615/IntJMultCompEng.v5.i3-4.100 Jaime Marian AbstraktThis article is concerned with the study of scale effects in Au nanopillars under compression. We propose that plastic yielding in these nanostructures is characterized by a critical length scale at which a transition from volumetric to surface-dominated plasticity takes place. This transition effectively sets a lower bound on the self-similar behavior commonly assumed in nanostrength models. Using quasi-continuum simulations, we study the subcritical regime and find that plasticity at these scales is governed by dislocation emission at surface irregularities. |
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