Mixed Mode Fatigue Crack Growth Related to Widespread Fatigue Damage

  • D. Y. Jeong
  • P. Tong
Conference paper


The problems associated with fatigue were brought to the forefront of research by the structural failure of a transport category aircraft in 1988. This failure was attributed to the occurrence of multiple cracking which has since been termed “Widespread Fatigue Damage” (WFD). Figure 1 is a photograph of the multiple cracking that occurred in the upper rivet row of a lap splice joint located in the vicinity of the fuselage crown. Apparently, the fatigue cracks propagate at an inclined angle rather than purely horizontal. The inclined angle of the cracks implies that the fuselage lap joint is subjected to mixed mode loading. The source of the mixed mode loading in the fuselage is assumed to be biaxial stress due to cabin pressurization combined with transverse shear due to body bending. In this paper, a methodology to perform mixed mode fatigue crack growth calculations is proposed to predict the growth of inclined cracks emanating from an open hole in an infinite medium subjected to remote stress. This methodology is based on an engineering approximation of a curved crack modelled as a straight crack of equal stress intensity. Two different criteria are considered to determine the crack trajectory or angle of crack propagation. Also, different crack growth rate models are assumed for each criterion. In particular, the maximum principal stress criterion [1] is used in conjunction with an effective Paris-Walker type equation, and the strain energy density criterion [2] is used with a corresponding crack growth model.


Fatigue Crack Stress Intensity Factor Strain Energy Density Incline Angle Mixed Mode Loading 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. [1]
    F. Erdogan and G.C. Sih, “On the crack extension in plates under plane loading and transverse shear,” Journal of Basic Engineering 85, 519–527 (1963).CrossRefGoogle Scholar
  2. [2]
    G.C. Sih, “Strain energy density factor applied to mixed mode crack problems,” International Journal of Fracture 10, 305–322 (1974).CrossRefGoogle Scholar
  3. [3]
    K. Walker, “The effect of stress ratio during crack propagation and fatigue for 2024-T3 and 7075-T6 aluminum,” Effects of Environment and Complex Load History on Fatigue Life, ASTM STP 462, American Society for Testing and Materials, 1–14(1970).Google Scholar
  4. [4]
    G.C. Sih and B.M. Barthelemy, “Mixed mode fatigue crack growth predictions,” Engineering Fracture Mechanics 13, 657–666 (1980).CrossRefGoogle Scholar
  5. [5]
    Y.C. Hsu, “The infinite sheet with two radial cracks from cylindrical hole under inclined tension or in-plane shear,” International Journal of Fracture 13, 839–845 (1977).CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1995

Authors and Affiliations

  • D. Y. Jeong
    • 1
  • P. Tong
    • 1
    • 2
  1. 1.U.S. Department of TransportationVolpe National Transportation Systems CenterCambridgeUSA
  2. 2.Hong Kong University of Science and TechnologyKowloon, Hong KongChina

Personalised recommendations