FRACTURE ANALYSIS OF CRACKS RELATED TO ROCK FRAGMENTATION

In the late 1960's, linear elastic fracture mechanics (lefm) was seldom used in the analysis of rock fragmentation problems. During the 1970's however, an awareness of the equivalence of the global energy rate balance formulation with the local energy release, expressed in stress intensity factors, as is usual in lefm, has penetrated rock fragmentation research. The main purpose of this thesis is to use lefm analysis on cracks related to rock fragmentation, and to show how this clarifies some basic aspects of the process. The methods used are: complex representation and conformal mapping; Mellin transforms and Wiener-Hopf method; path independent intervals; numerical accuracy of conformal mapping method. The advantages and disadvantages of the methods are discussed, and some general conclusions are presented concerning the stress intensity factors and the configurational stability of radial and star crack systems. /TRRL/

  • Corporate Authors:

    Stiftelsen Svensk Detonikforskning

    P.O. Box 32058
    Stockholm,   Sweden 
  • Authors:
    • Ouchterlony, F
  • Publication Date: 1978

Media Info

  • Features: References;
  • Pagination: 32 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00189560
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Thesis
  • Files: ITRD, TRIS
  • Created Date: Apr 12 1979 12:00AM