LOCAL STRESSES NEAR DEEP SURFACE FLAWS UNDER CYLINDRICAL BENDING FIELDS

A series of tests was performed using the stress freezing and slicing technique of photoelasticity in order to obtain the stress fields near points of maximum flaw penetration and where the crack border intersects the tensile surface of the plate for naturally grown surface flaws under fields of remote cylindrical bending. Geometrics investigated ranged over crack depth to crack length ratios of approximately 0.13 to 0.55 and over crack depth to plate thickness ratios of approximately 0.27 to 0.79. Results were compared with several approximate theories on the basis of graphs of normalized maximum in-plane shear stress versus normalized distance from the crack tip and stress intensity factor in order to assess the validity of the several field theories. A numerical technique for data conditioning was employed from which the stress intensity factors were computed and compared with theoretical values.

• Supplemental Notes:
  • Presented at the National Symposium on Fracture Mechanics (6th), Philadelphia, Pennsylvania, 28-30 August, 1972.
• Corporate Authors:

  Virginia Polytechnic Institute and State University, Blacksburg

  Department of Agronomy
  Blacksburg, VA  United States  24061
• Authors:
  • Schroedl, M A
  • Smith, C W
• Publication Date: 1972-8

Media Info

• Pagination: 53 p.

Subject/Index Terms

• TRT Terms: Cracking; Fatigue (Mechanics); Photoelasticity; Stresses
• Uncontrolled Terms: Stress intensity factors
• Old TRIS Terms: Crack stresses; Fatigue stress
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00041283
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: VPI-E-72-9
• Contract Numbers: DAAF07-69-C-0444
• Files: TRIS
• Created Date: Mar 2 1973 12:00AM