| Title | Size scaling and bursting activity in thermally activated breakdown of fiber bundles. | | Author(s) | Yoshioka N, Kun F, Ito N | | Institution | Department of Applied Physics, Graduate School of Engineering, The University of Tokyo, 7-3-1, Hongo, Bunkyo-ku, Tokyo, 113-8656, Japan. | | Source | Phys Rev Lett 2008 Oct 3; 101(14):145502. | | Abstract | We study subcritical fracture driven by thermally activated damage accumulation in the framework of fiber bundle models. We show that in the presence of stress inhomogeneities, thermally activated cracking results in an anomalous size effect; i.e., the average lifetime t_{f} decreases as a power law of the system size t_{f} approximately L;{-z}, where the exponent z depends on the external load sigma and on the temperature T in the form z approximately f(sigma/T;{3/2}). We propose a modified form of the Arrhenius law which provides a comprehensive description of thermally activated breakdown. Thermal fluctuations trigger bursts of breakings which have a power law size distribution. | | Language | eng | | Pub Type(s) | Journal Article
| | PubMed ID | 18851540 |
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