A PROCEDURE FOR EVALUATING FRACTURE DYNAMIC PARAMETERS FROM CRACK VELOCITY MEASUREMENTS

A combined numerical and experimental procedure for evaluating some of the fracture dynamic parameters which govern the crack run-arrest response in a fracturing plate are discussed. A dynamic finite element code is used to compute the dynamic stress intensity factor and dynamic energy release rate associated with a propagating crack which is driven by the experimentally determined crack velocity. Numerical results generated by the developed procedure are then compared with dynamic stress intensity factors obtained through dynamic photoelastic analysis of fracturing Homalite-100 plates. Two edge-cracked specimens with fixed edge displacement loadings and two wedge-loaded double cantilever beam specimens were considered in this comparative study. Good agreements were obtained between the results obtained by the developed numerical-experimental procedure and dynamic photoelasticity.

• Supplemental Notes:
  • Work performed under Contract N00014-76-C-0060NR064-478.
• Corporate Authors:

  Office of Naval Research

  Department of the Navy, 800 North Quincy Street
  Arlington, VA  United States  22217
• Authors:
  • Kobayashi, A S
  • Mall, S
• Publication Date: 1977-5

Subject/Index Terms

• TRT Terms: Cracking; Finite element method; Fracture mechanics; Photoelasticity; Stresses; Structural analysis
• Uncontrolled Terms: Stress intensity factors
• Old TRIS Terms: Crack arrest
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00157287
• Record Type: Publication
• Report/Paper Numbers: No. TR28 Tech. Rpt.
• Contract Numbers: N00014-76-C-0060
• Files: TRIS
• Created Date: Aug 4 2004 12:00AM