ELASTODYNAMIC EFFECTS ON CRACK ARREST
The first part of the paper is concerned with the elastodynamic stress field in the vicinity of a rapidly propagating crack tip. Elastodynamic stress intensity factors and their role in the fracture criterion of the balance of rates of energies are discussed. The remainder of the paper deals with the near-tip stress field for a sudden discontinuous change of the speed of a rapidly propagating crack tip, including the case that the crack tip is suddenly arrested. Analytical expressions are derived for the elastodynamic stress intensity factor, for the case that the crack tip speed instantaneously changes from c1 to C2, where c2 is less than c1. Arrest, or continued propagation of crack tip at a reduced speed are investigated on the basis of the fracture criterion of the balance of rates of energies.
- Presented at the Symposium on "Fast Fracture and Crack Arrest" Annual Meeting of the ASTM, June 1976.
Northwestern University, EvanstonDepartment of Civil and Environmental Engineering, 2145 Sheridan Road
Evanston, IL United States 60208
- Achenbach, J D
- Tolikas, P K
- Publication Date: 1976-7
- Features: References;
- Pagination: 27 p.
- TRT Terms: Cracking; Dynamic modulus of elasticity; Fracture mechanics; Stresses
- Uncontrolled Terms: Crack propagation; Elastodynamic analysis; Stress intensity factors
- Old TRIS Terms: Crack arrest
- Subject Areas: Marine Transportation; Materials;
- Accession Number: 00141397
- Record Type: Publication
- Source Agency: Office of Naval Research
- Report/Paper Numbers: NU-SML TR No. 76-2 Intrm. Rpt
- Contract Numbers: N00014-76-C-0063
- Files: TRIS
- Created Date: Oct 26 1976 12:00AM