Volume 83, Number 4, August 2008
|Number of page(s)||6|
|Section||Condensed Matter: Structural, Mechanical and Thermal Properties|
|Published online||06 August 2008|
A coarse-grained model of thermally activated damage in heterogeneous media: Time evolution of the creep rate
Department of Applied Mathematics, University of Crete - Heraklion 714 09, Greece, EU
Corresponding author: firstname.lastname@example.org
Accepted: 4 July 2008
A coarse-grained mean-field model is proposed where the damage enhanced creep of heterogeneous materials is described by the theory of absolute reaction rates. The dynamics of the proposed model, below a critical load, is characterized by an intensive precursor activity in the form of avalanches of microscopic breaking events that leads to a final catastrophic cascade occurring at a finite strain. Above the critical load, failure is instantaneous. The critical load is the static (elastic) fracture strength; thus the model is consistent with its time-independent analogue. Finally, the proposed model reproduces the experimental observations on the time evolution of the creep rate.
PACS: 62.20.Hg – Creep / 81.40.Np – Fatigue, corrosion fatigue, embrittlement, cracking, fracture, and failure / 05.70.Ln – Nonequilibrium and irreversible thermodynamics
© EPLA, 2008
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.