FATIGUE CRACK PROPAGATION IN BUTT WELDS CONTAINING JOINT PENETRATION DEFECTS

FATIGUE TESTS HAVE BEEN CONDUCTED ON LOW CARBON STEEL BUTT WELDS CONTAINING JOINT PENETRATION DEFECTS (LESS THAN COMPLETE JOINT PENETRATION). THE GROWTH OF FATIGUE CRACKS FROM SIMULATED PENETRATION DEFECTS WAS MONITORED BY RADIOGRAPHY. THESE MEASUREMENTS ALLOWED THE TOTAL FATIGUE LIFE TO BE SEPARATED INTO PERIODS OF CRACK INITIATION AND CRACK PROPAGATION. THE INITIATION PERIOD WAS FOUND TO OCCUPY APPROXIMATELY ONE-HALF OF THE TOTAL FATIGUE LIFE AND CONSISTS OF THE CYCLES NECESSARY TO SHAKE DOWN THE RESIDUAL STRESSES IN THE WELD AND TO FORM THE PENETRATION DEFECT INTO AN ACTIVE FATIGUE CRACK. /AUTHOR/

• Authors:
  • Lawrence, F V
  • Munse, W H
• Publication Date: 1973-5

Media Info

• Pagination: p. 221-5
• Serial:
  • Welding Journal American Welding Soc
  • Volume: 52
  • Issue Number: 5

Subject/Index Terms

• TRT Terms: Butt welds; Cracking; Defects; Fatigue (Mechanics); Fatigue tests; Radiography; Residual stress; Simulation
• Uncontrolled Terms: Crack propagation; Fatigue life
• Subject Areas: Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00217321
• Record Type: Publication
• Files: TRIS
• Created Date: Jul 8 1973 12:00AM