THREE-DIMENSIONAL FRACTURE MECHANICS ANALYSIS

Efficient and accurate stress analysis methods are required to perform routine fracture mechanics analysis of surface and corner cracks in structures. Such analysis capabilities form the basis of fatigue life predictions for growing cracks in gas turbine engine structures. Boundary-integral equation (BIE) methods offer significant advantages to the fracture mechanics analyst in ease of use, accuracy, and modeling efficiency. Techniques for modeling three-dimensional fracture mechanics problems using the boundary-integral equation method are reviewed. Strain energy release rate modeling, together with crack opening displacement data, are found to give accurate and systematic estimates of crack front stress intensity factor distributions. Accuracy of the techniques are evaluated for well-known buried elliptical crack problems. Numerical models are extended to surface and corner cracks. /Author/

• Supplemental Notes:
  • Presented at the ASCE National Structural Engineering Convention and Exposition, New Orleans, Louisiana, April 14-18, 1975.
• Corporate Authors:

  American Society of Civil Engineers

  345 East 47th Street
  New York, NY  United States  10017-2398
• Authors:
  • Cruse, T A
  • Meyers, G J
• Publication Date: 1977-2

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 309-320
• Serial:
  • Journal of the Structural Division
  • Volume: 103
  • Issue Number: ST2
  • Publisher: American Society of Civil Engineers

Subject/Index Terms

• TRT Terms: Cracking; Estimates; Fatigue (Mechanics); Fracture mechanics; Frost action; Fuel consumption; Gas turbines; Mathematical models; Surfaces; Turbine engines
• Uncontrolled Terms: Fatigue life; Fracture; Surface cracks
• Subject Areas: Bridges and other structures; Energy; Highways;

Filing Info

• Accession Number: 00165374
• Record Type: Publication
• Report/Paper Numbers: ASCE 12750 Proceeding
• Files: TRIS
• Created Date: Mar 7 1978 12:00AM