FIZIKA A 18 (2009) 2 , 73-80

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CREEP RUPTURE IN FIBER BUNDLE MODEL

A. LAHYANIa,b, Y. BOUGHALEBa,b, M. QJANIa, R. NASSIFa, S. OUASKITb and R. EL GUERJOUMAc

aLaboratoire de physique de la matière condensée, Faculté des sciences El Jadida, B. P. 20, El Jadida, Maroc
bLaboratoire de physique de la matière condensée, Faculté des sciences Ben M'sik, B.P. 7955, Casablanca, Maroc
cLAUM UMR, CNRS, 6613, Université du Maine, Le Mans, France

Received 19 April 2009;  Accepted 15 July 2009
Online 7 September 2009

We study the creep rupture of fiber composites subjected to uniaxial constant load within the framework of the fiber bundle model. Our numerical studies show that in the primary creep, the deformation rate exhibits a power law relaxation followed by a power law acceleration in the tertiary creep. We also investigate the behavior of the failure time and the avalanche size distribution. A good agreement is found between experiments and the model prediction, particularly for deformation power-laws scaling in the primary-creep regime and in the tertiary-creep neighbourhood of rupture.

PACS numbers: 62.20.Hg, 81.40.Np
UDC 539.376, 539.422.5

Keywords: fiber bundle model, heterogeneous materials, creep rupture, Langevin dynamics

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