NUMERICAL EVALUATION OF ELASTIC STRESS INTENSITY FACTORS BY THE BOUNDARY-INTEGRAL EQUATION METHOD

Numerical evaluations of elastic stress intensity factors are obtained by solution of certain integral equations, referred to as the boundary-integral equations, which relate the boundary tractions to the boundary displacements. The boundary-integral equation method has several advantages over other numerical methods such as finite elements for solving crack problems. These advantages are reduced problem size, reduced computer time requirements, and increased internal stress resolution. The methods for evaluating stress intensity factors are developed through a study of a series of increasingly complex geometries. The first problem is a center-cracked planar body solved by the two dimensional version of the method. The second problem is the penny-shaped crack, solved by the three dimensional version of the method. Finally, the three dimensional problem of a semi-circular surface flaw in an essentially infinite body is studied. (Author)

• Supplemental Notes:
  • Also available in The Surface Crack: Physical Problems and Computational Solutions (American Society of Mechanical Engineers), pp 153-170, 1972.
• Corporate Authors:

  Carnegie Institute of Technology

  Department of Mechanical Engineering
  Pittsburgh, PA  United States 
• Authors:
  • Cruse, T A
• Publication Date: 1972-11

Media Info

• Pagination: 21 p.

Subject/Index Terms

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

Filing Info

• Accession Number: 00044657
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: AROD-9837:4-E
• Contract Numbers: DA-ARO-D-31-124-72G3
• Files: TRIS
• Created Date: Jul 31 1974 12:00AM