pure and applied geophysics

, Volume 76, Issue 1, pp 147–152 | Cite as

Compressional angles of isallo stress theory for a circular-cylindrical, spherical and elliptic-cylindrical elastic inhomogeneity in an elastic medium

  • Hans Pulpan
  • Adrian E. Scheidegger


The compressional angle of isallo stress theory for the case of a cylindrical (circular and elliptic) and spherical subsurface inhomogeneity, assuming that the conjugate fracture surfaces are inclined at a Mohr angle of 30° toward the largest compression, has been calculated. The solution for a spherical and cylindrical inclusion in an infinite medium subject to a uniform stress field (at infinity) were taken as the basis for the stress analysis. The stress angle was then calculated for the mentioned types of inclusions.


Fracture Surface Stress Field Stress Analysis Elastic Medium Uniform Stress 
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  1. [1]
    J. N. Goodier,Concentration of Stress Around Spherical and Cylindrical Inclusions and Flaws, Trans. ASME55 (1933), 39–44.Google Scholar
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    H. Pulpan,A Complex Variable Technique for the Stress Field Around an Elliptic Underground Inhomogeneity, Pure and Appl. Geophys.,76 (1969/V), 137–146.Google Scholar
  3. [3]
    A. E. Scheidegger,On the use of Stress Values as an Exploration Tool, Pure and Appl. Geophys.59 (1964), 38–44.Google Scholar
  4. [4]
    A. E. Scheidegger,Isallo Stress Prospecting, Z. Geophys.32 (1966), 182–199.Google Scholar

Copyright information

© Birkhäuser Verlag 1969

Authors and Affiliations

  • Hans Pulpan
    • 1
  • Adrian E. Scheidegger
    • 2
  1. 1.University of IllinoisUrbanaUSA
  2. 2.University of IllinoisUrbanaUSA

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