Continuous Damage Fiber Bundle Model for Strongly Disordered Materials

Details Continuous Damage Fiber Bundle Model for Strongly Disordered Materials Continuous Damage Fiber Bundle Model for Strongly Disordered Materials

2007-06-11

arxiv.org/abs/0706.1554v1

Physics

Condensed Matter

Materials Science

10 pages, 13 figures

Scientific paper

10.1103/PhysRevE.77.046102

We present an extension of the continuous damage fiber bundle model to describe the gradual degradation of highly heterogeneous materials under an increasing external load. Breaking of a fiber in the model is preceded by a sequence of partial failure events occurring at random threshold values. In order to capture the subsequent propagation and arrest of cracks, furthermore, the disorder of the number of degradation steps of material constituents, the failure thresholds of single fibers are sorted into ascending order and their total number is a Poissonian distributed random variable over the fibers. Analytical and numerical calculations showed that the failure process of the system is governed by extreme value statistics, which has a substantial effect on the macroscopic constitutive behaviour and on the microscopic bursting activity as well.

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