Proposed modification to the Zheng and Hirt fatigue model

  • B. K. C. Yuen
  • F. Taheri
Testing And Evaluation


The Zheng and Hirt model describes the fatigue behavior of metals based on the tensile properties, thus eliminating the need for extensive fatigue crack propagation tests as required by other fatigue models. The model uses the fracture strength of the material based on a relationship. The predictability of the model was improved by incorporating into the equations the measured fracture strength of the material instead of the calculated value. An experimental investigation, consisting of both tension and fatigue testing on the 350WT category 5 steel, was performed to verify the proposed modification. The results showed that the modified model predicted the fatigue crack growth rates of the steel with a greater accuracy than the original model.


350WT steel fatigue crack propagation fracture strength tensile properties Zheng and Hirt fatigue model 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    P.C. Paris and F. Erdogan: “A Critical Analysis of Crack Propagation Laws,” J. Basic Eng., Trans. ASME, 1963, 85, pp. 528–34.Google Scholar
  2. 2.
    N.E. Dowling, Mechanical Behavior of Materials: Engineering Methods for Deformation, Fracture, and Fatigue, Prentice Hall, Englewood Cliffs, NJ, 1993.Google Scholar
  3. 3.
    X. Zheng and M.A. Hirt: “Fatigue Crack Propagation in Steels,” Eng. Fract. Mech., 1983, 18(5), pp. 965–73.CrossRefGoogle Scholar
  4. 4.
    X. Zheng: “A Simple Formula for Fatigue Crack Propagation and a New Method for the Determination of ΔK th,” Eng. Fract. Mech., 1987, 27(4), pp. 465–75.CrossRefGoogle Scholar
  5. 5.
    D.N. Lal and V. Weiss: “A Notch Analysis of Fracture Approach to Fatigue Crack Propagation,” Metall. Trans., 1978, 9(A), pp. 413–26.Google Scholar
  6. 6.
    X. Zheng: “Local Strain Range and Fatigue Crack Initiation Life,” IABSE Proc. Fatigue Colloq., 1982, pp. 169–78.Google Scholar
  7. 7.
    Anon: “ASTM Designation E 647-00,” in 2000 Annual Book of ASTM Standards, ASTM, West Conshohocken, PA, 2000, pp. 594–629.Google Scholar
  8. 8.
    Anon: “ASTM Designation E 8M-01,” in 2001 Annual Book of ASTM Standards, ASTM, West Conshohocken, PA, 2001, pp. 82–103.Google Scholar
  9. 9.
    P.A. Rushton, F. Taheri, and D.C. Stredulinsky: “Threshold and Variable Amplitude Crack Growth Behavior in 350WT Steel,” Proc. 21st Int. Conf. on Pressure Vessels and Piping, ASME-PVP, 2002, 441, pp. 81–89.Google Scholar
  10. 10.
    P.A. Rushton and F. Taheri: “Prediction of Variable Amplitude Crack Growth in 350WT Steel Using a Modified Wheeler Approach,” J. Marine Struct., 2003, 16(7), pp. 517–39.CrossRefGoogle Scholar
  11. 11.
    J.M. Barsom and S.T. Rolfe: Fracture and Fatigue Control in Structures: Applications of Fracture Mechanics, 3rd ed., ASTM, West Conshohocken, Pa, 1999.Google Scholar

Copyright information

© ASM International 2004

Authors and Affiliations

  • B. K. C. Yuen
    • 1
  • F. Taheri
    • 1
  1. 1.Department of Civil EngineeringDalhousie UniversityHalifaxCanada

Personalised recommendations