Accession Number:

ADA055359

Title:

Cyclic Ductility, Cyclic Strength and Fatigue Crack Propagation of Metals and Alloys.

Descriptive Note:

Technical rept.,

Corporate Author:

GEORGIA INST OF TECH ATLANTA SCHOOL OF CHEMICAL ENGINEERING

Personal Author(s):

Report Date:

1978-05-16

Pagination or Media Count:

34.0

Abstract:

Fatigue crack propagation has been related to the cyclic stress-strain and life-strain response of materials by means of a ductility exhaustion mechanism. The dadn-delta K relationship has been derived from the assumption that an elemental crack extension occurs when the sum of the fractional fatigue life of an element at various cycles is equal to unity. Experimental fatigue crack propagation data of representative metals and alloys have been compared with that predicted from their low cycle fatigue properties. The threshold delta K behavior has been explained in terms of the existance of a threshold plastic strain amplitude. Author

Subject Categories:

  • Metallurgy and Metallography
  • Numerical Mathematics
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE