BIFURCATION OF A RUNNING CRACK IN ANTI-PLANE STRAIN

An elastodynamic explanation of a running crack bifurcation is explored. The geometry is a semi-infinite body in a state of anti-plane strain, which contains a two-dimensional edge crack. It is assumed that a quasi-static increase of the external loads gives rise to rapid crack propagation at time t=0, with an arbitrary and time-varying speed, but in the plane of the crack. A short time later the crack is assumed to bifurcate at angles - ntt and + ntt, and with velocities v. The elastodynamic intensity factors are computed, and the balance of rates of energies is employed to discuss the conditions for bifurcation.

  • Supplemental Notes:
    • This work was sponsored by the Office of Naval Research, Structural Mechanics Program, Department of the Navy, Arlington, Virginia 22217.
  • Corporate Authors:

    Northwestern University, Evanston

    Department of Civil and Environmental Engineering, 2145 Sheridan Road
    Evanston, IL  USA  60208
  • Authors:
    • Achenbach, J D
  • Publication Date: 1974-11

Media Info

  • Features: References;
  • Pagination: 32 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00080059
  • Record Type: Publication
  • Source Agency: Ship Structure Committee
  • Report/Paper Numbers: NU-SML TR No. 75-2 Intrm Rpt
  • Contract Numbers: N00014-67A-0356-0034
  • Files: TRIS
  • Created Date: May 1 1975 12:00AM