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.
- This work was sponsored by the Office of Naval Research, Structural Mechanics Program, Department of the Navy, Arlington, Virginia 22217.
Northwestern University, EvanstonDepartment of Civil and Environmental Engineering, 2145 Sheridan Road
Evanston, IL United States 60208
- Achenbach, J D
- Publication Date: 1974-11
- Features: References;
- Pagination: 32 p.
- TRT Terms: Cracking; Dynamic modulus of elasticity; Fracture mechanics; Stresses
- Uncontrolled Terms: Crack propagation; Elastodynamic analysis; Stress intensity factors
- Subject Areas: Marine Transportation; Materials;
- 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