A CRACK EXTENDING NON-UNIFORMLY IN AN ELASTIC SOLID SUBJECTED TO GENERAL LOADING

The stress intensity factor of a half-plane crack extending non-uniformly in an isotropic elastic solid subjected to general loading is determined. The loading is applied in such a way that a state of plane strain exists, and that crack extension takes place in mode I. The crack tip is initially at rest, and then moves in an arbitrary way in the plane of the crack. In the process of obtaining the stress intensity factor, the complete elastic field is determined for a crack which starts from some initial position, extends at a constant rate for some time, and then suddenly stops. Once the stress intensity factor is known for arbitrary motion of the crack tip, the Griffith fracture criterion is applied to obtain an equation of motion for the crack tip which is consistent with the assumptions of this criterion. Numerical results are included for the stress intensity factor and for the velocity-dependent term in the equation motion. (Author)

• Corporate Authors:

  Brown University

  Providence, RI  United States  02912
• Authors:
  • Freund, L B
• Publication Date: 1971-12

Media Info

• Pagination: 35 p.

Subject/Index Terms

• TRT Terms: Cracking; Fracture mechanics; Stresses; Structural analysis
• Uncontrolled Terms: Crack propagation; Stress intensity factors
• Old TRIS Terms: Crack stresses
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00034377
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: AFML-TR-71-263 Tech Rpt
• Contract Numbers: F33615-71-C-1308
• Files: TRIS
• Created Date: Sep 15 1973 12:00AM