EFFECT OF FLAWS ON FATIGUE STRENGTH OF CAST MATERIALS

Material flaws greatly affect the fatigue strength of cast material components. The authors propose a method for evaluating fatigue strength when such flaws are present, concentrating on the fatigue strength of cast steel with flaws that are round in shape, and introducing the concept of an allowance rate. A fracture mechanics approach was used to estimate the fatigue limit of the steel, regarding the flaw as an elliptical notch with an intrinsic crack at the root. By this method, the allowance rate of a flawed body, as against that of a cracked one, could be estimated. The allowance rate can also be obtained experimentally through brittle fracture testing of a notched body at an extremely low temperature. The concept of the allowance rate was verified by fatigue tests of a specimen with a notch and with an actual casting flaw.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/05148499
• Supplemental Notes:
  • Journal article
• Authors:
  • MORITA, K
  • Murai, R
  • Kajimoto, K
• Publication Date: 1990-6

Language

• Japanese

Media Info

• Features: References;
• Pagination: 7 p.
• Serial:
  • Journal of the Society of Naval Architects of Japan
  • Volume: 167
  • ISSN: 0514-8499

Subject/Index Terms

• TRT Terms: Cast steel; Casting; Defects; Fatigue strength; Notching (Cutting)
• Old TRIS Terms: Allowance rate; Notches
• Subject Areas: Construction; Marine Transportation;

Filing Info

• Accession Number: 00661074
• Record Type: Publication
• Source Agency: Maritime Technical Information Facility
• Files: TRIS
• Created Date: Jul 21 1994 12:00AM