DYNAMIC PHOTOELASTIC ANALYSIS OF CRACK BRANCHING

Previous dynamic photoelastic data on crack branching in edge-cracked Homalite-100 tension specimens were re-evaluated using the concept of averaged dynamic strain energy release rate. Dynamic stress intensity factors which were determined by dynamic photoelasticity, were used to compute the dynamic strain energy release rates. Average strain energy release rates were then obtained by dividing sums of the total dynamic strain energies released by the corresponding total surface areas of newly generated crack surfaces. This new evaluation of previous data indicates that crack branching occurred when the average strain release rate is greater than twice G sub c, where G sub c is critical static strain energy release rate of the Homalite-100 sheets used in this investigation.

• Corporate Authors:

  University of Washington, Seattle

  Department of Mechanical Engineering
  Seattle, WA  United States  98105
• Authors:
  • Kobayashi, A S
  • Mall, S
  • Bradley, W B
• Publication Date: 1975-7

Media Info

• Features: References;
• Pagination: 18 p.

Subject/Index Terms

• TRT Terms: Cracking; Fracture mechanics; Strain (Mechanics)
• Uncontrolled Terms: Crack propagation; Strain energy
• Old TRIS Terms: Crack arrest
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00099925
• Record Type: Publication
• Source Agency: Ship Structure Committee
• Report/Paper Numbers: #22 Tech. Rpt.
• Contract Numbers: N00014-67-A0103-0040
• Files: TRIS
• Created Date: Oct 18 1975 12:00AM