COMPARISON OF FRACTURE TOUGHNESS INFORMATION DERIVED FROM THE WIDE PLATE TEST AND THE DEEP NOTCH TEST

Wide plate and deep notch tests were carried out on BS1501:161:Grade 32 material 25mm thick. It is shown that both test configurations give similar results in terms of the temperature for 0.5% strain to fracture. Analysis of the specimen types using COD, indicates differences in tolerable defect sizes predicted from the two tests, these differences are thought to be due to differences in residual stress levels between the wide plate and deep notch specimens, the residual stress level being higher in the wide plate specimens. The differences are only significant however below the 0.5% strain transition temperature since above this temperature residual stresses are relieved by yielding in the test plates. Some estimates of the sizes of defects which could cause failure in service as opposed to the calculated tolerable defect sizes which are considered to be safe, show the large margin of safety between tolerable and critical defect sizes.

• Corporate Authors:

  British Steel Corporation

  Information Services
  Sheffield,   England 
• Authors:
  • Terry, P
• Publication Date: 1974-2

Media Info

• Pagination: 16 p.

Subject/Index Terms

• TRT Terms: Cracking; Fracture properties; Measurement; Notch tests; Notching (Cutting); Strength of materials
• Old TRIS Terms: Crack opening measurement; Notch toughness
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00057221
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: GS/PROD/149/2/73/C Open Rept.
• Files: TRIS
• Created Date: Aug 16 1974 12:00AM