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pure and applied geophysics

, Volume 102, Issue 1, pp 15–28 | Cite as

Earthquake processes in a micromorphic continuum

  • Roman Teisseyre
Article

Summary

The paper introduces a new model earthquake process based on the theory of micromorphic continua. The processes in a focal region are described by deformations of microstructure in time. It is assumed that the fracturing processes as well as phase transformation of metamorphic phenomena have caused in the past certain non-reversible changes which determine the microstructure of focal region. These internal microstructural elements form the attaching points around which the couple stresses arise. The properties of focal region are determined by the constitutive equations. The micromorphic mechanics considers the existence of body couples as determined by a regional stresses and looks after a response field of stresses, stress moments and strains in the focal region. Further, it is explained how microdislocation field is connected with microdeformations and micromorphic structure. In the considered earthquake structure model a microanisotropy is assumed through the tensor of microinertia. This tensor describes a distribution of microelements. Simple solutions of wave processes in a focal region are presented. The dispersion of waves is discussed.

Keywords

Microstructure Phase Transformation Constitutive Equation Simple Solution Couple Stress 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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Copyright information

© Birkhäuser Verlag 1973

Authors and Affiliations

  • Roman Teisseyre
    • 1
  1. 1.Institute of Geophysics Polish Academy of SciencesWarsawPoland

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