Failure criterion for materials with spatially correlated mechanical properties

J. Faillettaz and D. Or
Phys. Rev. E 91, 032134 – Published 24 March 2015

Abstract

The role of spatially correlated mechanical elements in the failure behavior of heterogeneous materials represented by fiber bundle models (FBMs) was evaluated systematically for different load redistribution rules. Increasing the range of spatial correlation for FBMs with local load sharing is marked by a transition from ductilelike failure characteristics into brittlelike failure. The study identified a global failure criterion based on macroscopic properties (external load and cumulative damage) that is independent of spatial correlation or load redistribution rules. This general metric could be applied to assess the mechanical stability of complex and heterogeneous systems and thus provide an important component for early warning of a class of geophysical ruptures.

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  • Received 22 October 2013
  • Revised 15 April 2014

DOI:https://doi.org/10.1103/PhysRevE.91.032134

©2015 American Physical Society

Authors & Affiliations

J. Faillettaz*

  • 3G, University of Zurich, 8057 Zürich, Switzerland

D. Or

  • STEP, ETH Zürich, 8092 Zürich, Switzerland

  • *Also at STEP, ETH Zürich, 8092 Zürich, Switzerland.

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Vol. 91, Iss. 3 — March 2015

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