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pure and applied geophysics

, Volume 157, Issue 11–12, pp 1929–1943 | Cite as

Damage Localization as a Possible Precursor of Earthquake Rupture

  • H.L. Li
  • Y.L. Bai
  • M.F. Xia
  • F.J. Ke
  • X.C. Yin

Abstract

—Based on the concepts of statistical mesoscopic damage mechanics, the rupture of a heterogeneous medium is investigated in terms of numerical simulations of a network model, subjected to simple shear loading. The heterogeneities are simulated by varying the sizes and fracture strains of the elements of the network. Progressive damage is governed by a damage field equation and a dynamic function of damage (DFD). From the damage field equation, a criterion for damage localization can be derived, and the DFD can be extracted from the simulations of the network. Importantly, the DFD intrinsically governs the damage localization. Both stress-free and periodic boundary conditions for the network are examined. It is found that damage localization may be the underlying mechanism of eventual rupture and thus could be used as a possible precursor of earthquake rupture.

Key Words: Heterogeneous medium, rupture, statistical mesoscopic damage mechanics, dynamic function of damage, damage localization. 

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Copyright information

© Birkhauser Verlag Basel, 2000

Authors and Affiliations

  • H.L. Li
    • 1
  • Y.L. Bai
    • 1
  • M.F. Xia
    • 1
  • F.J. Ke
    • 1
  • X.C. Yin
    • 1
  1. 1.State Key Laboratory of Non-linear Mechanics, Institute of Mechanics, Chinese Academy of Sciences, Beijing 100080, China. E-mail: lihl@lnm.imech.ac.cnCN

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