A LINEAR ELASTIC FRACTURE MECHANICS ASSESSMENT OF THE FATIGUE-CRACK-GROWTH BEHAVIOUR FOR A SEMI-ELLIPTICAL SURFACE CRACK IN MACHINED AND WELDED SPECIMENS SUBJECTED TO CONSTANT AMPLITUDE TENSION LOADING

A fatigue life prediction model with two degrees of freedom in crack growth, in the maximum depth and surface intersection directions, has been programmed for a semi-elliptical surface crack. Stress intensity factor solutions for a semi-elliptical surface crack in plain plate and fillet shoulder specimens are presented. Experimental fatigue-crack-growth tests were conducted for both types of specimen and a cruciform welded joint. A semi-elliptical surface crack of known dimensions was used in all cases. Comparisons were then made between the predicted and experimental results in order to evaluate the effects of crack-growth threshold and crack closure on the predicted life and crack shape development.

• Supplemental Notes:
  • National Engng Laboratory, Jan 1991, Report 720 [27 p, 6 ref, 9 tab]
• Authors:
  • Pang, H L
• Publication Date: 1991

Language

• English

Subject/Index Terms

• TRT Terms: Cracking; Fracture mechanics; Mechanical fatigue
• Uncontrolled Terms: Crack propagation; Fatigue life
• Subject Areas: Marine Transportation;

Filing Info

• Accession Number: 00700859
• Record Type: Publication
• Source Agency: British Maritime Technology
• Files: TRIS
• Created Date: Aug 14 1995 12:00AM