Europhys. Lett, 47 (4), pp. 456-461 (1999)
Failure time and microcrack nucleation
A. Guarino 1, S. Ciliberto 1 and A. Garcimartín 2
1 Laboratoire de Physique, CNRS UMR5672, Ecole Normale Superieure de Lyon
46 allée d'Italie, 69364 Lyon, France
2 Departamento de Física, Facultad de Ciencias, Universidad de Navarra
E-31080 Pamplona, Spain
(received 29 March 1999; accepted 28 June 1999)
PACS. 62.20Mk - Fatigue, brittleness, fracture, and
PACS. 46.50 - Fracture mechanics, fatigue and cracks.
PACS. 46.65 - Random phenomena and media.
The failure time of samples of heterogeneous materials (wood, fiberglass) is studied as a function of the applied stress. It is shown that in these materials the failure time is predicted with a good accuracy by a model of microcrack nucleation proposed by Pomeau. It is also shown that the crack growth process presents critical features when the failure time is approached.
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