Unified Description of Aging and Rate Effects in Yield of Glassy Solids

TitleUnified Description of Aging and Rate Effects in Yield of Glassy Solids
Publication TypeJournal Article
Year of Publication2005
AuthorsRottler, Jörg, and Mark O. Robbins
JournalPhysical Review Letters
Volume95
Pagination225504
Date Publishednov
AbstractThe competing effects of slow structural relaxations (aging) and deformation at constant strain rate on the shear yield stress τy of simple model glasses are examined using molecular simulations. At long times, aging leads to a logarithmic increase in density and τy. The yield stress also rises logarithmically with rate but shows a sharp transition in slope at a rate that decreases with increasing age. We present a simple phenomenological model that includes both intrinsic rate dependence and the change in properties with the total age of the system at yield. As predicted by the model, all data for each temperature collapse onto a universal curve.
URLhttp://link.aps.org/doi/10.1103/PhysRevLett.95.225504
DOI10.1103/PhysRevLett.95.225504
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