Crack Growth Rate Curves: Which Part Dominates Life Prediction and When?

  • C. Wallbrink
  • P. Jackson
  • W. Hu
Conference paper

Abstract

This paper details investigations into the importance of the crack growth rate data used in conjunction with FASTRAN to make fatigue crack growth predictions. Selected fighter and transport aircraft load spectra have been used in the present investigation to determine the regions of the crack growth rate curve that dominate the crack growth predictions. The results of the analysis show that universally crack growth predictions under typical aircraft load spectra utilize a significant portion of the crack growth rate curve close to the threshold region. Of note is the observation that both fighter and transport aircraft display this same behaviour throughout the entire crack growth prediction. This finding demonstrates the requirement for accurate crack growth rate data for small cracks to obtain appropriate total fatigue life predictions.

Keywords

Crack Growth Rate Fatigue Crack Growth Transport Aircraft Crack Growth Curve Crack Growth Analysis 
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.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

References

  1. 1.
    Newman Jr., J.C., Phillips, E.P., Swain, M.H.: International Journal of Fatigue 21(2), 109–119 (1999)CrossRefGoogle Scholar
  2. 2.
    Ranganathan, N., et al.: International Journal of Fatigue 33(3), 492–499 (2008)CrossRefGoogle Scholar
  3. 3.
    Wu, X.R., et al.: Fatigue and Fracture of Engineering Materials and Structures 21(11), 1289–1306 (1998)CrossRefGoogle Scholar
  4. 4.
    Molent, L., Singh, R., Woolsey, J.: Engineering Failure Analysis 12(1), 13–24 (2005)CrossRefGoogle Scholar
  5. 5.
    Goldsmith, N.T., Clark, G.: Analysis and Interpretation of Aircraft Component Defects Using Quantitative Fractography. In: Bernard, S.M., Susil, P.K. (eds.) ASTM International on Quantitative Methods in Fractography (1990)Google Scholar
  6. 6.
    Barter, S., et al.: Journal of Engineering Failure Analysis 12(1), 99–128 (2005)CrossRefGoogle Scholar
  7. 7.
    Wallbrink, C., Hu, W.: Advanced Materials Research 41-42, 189–197 (2008)CrossRefGoogle Scholar
  8. 8.
    Jones, R., Molent, L., Pitt, S.: In. Proceedings of International Conference on Fatigue Damage of Structural Materials VI, Hyannis, USA (2006)Google Scholar
  9. 9.
    Tiong, U.H., Jones, R.: International Journal of Fatigue 31(6), 1046–1053 (2009)MATHCrossRefGoogle Scholar
  10. 10.
    Newman Jr., J. C.: Fastran II - a Fatigue Crack Growth Structural Analysis Program. NASA TM-104159, NASA (1992) Google Scholar
  11. 11.
    Elber, W.: The Damage Tolerance in Aircraft Structures. In: ASTM STP, vol. 486. p. 230-242 (1971)Google Scholar
  12. 12.
    Diab, H., Goldsmith, R.: Fractography Results of F-111 Loads Interpretation and Truncation Validation (LITV) Coupon Test Program. DSTO-TR-2000, DSTO (2007)Google Scholar
  13. 13.
    Barter, S.A.: Fatigue Crack Growth in 7050-T7451 Aluminium Alloy Thick Section Plate with Surface Condition Simulating Some Regions of the F/A-18 Structure. DSTO-TR-1458 (2003)Google Scholar
  14. 14.
    Mongru, D.: Direct Current Potential Drop System Calibration of 1015-T6 Notched and Centre Crack Growth Coupons. DSTO-DP-1110, Melbourne, DSTO (2009)Google Scholar
  15. 15.
    Iyyer, N., et al.: International Journal of Fatigue 29(9-11), 1584–1607 (2007)MATHCrossRefGoogle Scholar
  16. 16.
    Newman, J.A., Piascik, R.S.: International Journal of Fatigue 26(9), 923–927 (2004)CrossRefGoogle Scholar
  17. 17.
    Newman Jr., J.C., Yamada, Y.: International Journal of Fatigue 32(6), 879–885 (2010)CrossRefGoogle Scholar
  18. 18.
    Ruschau, J.J., Newman Jr., J.C.: Journal of ASTM International 5(7) (2008)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2011

Authors and Affiliations

  • C. Wallbrink
    • 1
  • P. Jackson
    • 1
  • W. Hu
    • 1
  1. 1.Air Vehicles DivisionDSTOFishermans BendAustralia

Personalised recommendations