Metallurgical and Materials Transactions A

, Volume 43, Issue 8, pp 2763–2770 | Cite as

Effects of Pore Position in Depth on Stress/Strain Concentration and Fatigue Crack Initiation

Symposium: Fatigue & Corrosion Damage in Metallic Materials

Abstract

The stress field around a pore was analyzed as a function of the pore position in depth in the surface of a linear elastic solid using finite element modeling. It was found that the pore depth dominated the stress field around the pore on the surface and that the maximum stress was increased sharply when the pore intercepted with the surface at its top. Given the applied nominal stress, the magnitude of the maximum main stress only depended on the relative depth of the pore, while the pore size affected the stress distribution in the surface. An elastic-plastic model was also used to account for the yielding effect in the region where stress was over the yield strength. The results still indicated a significant maximum stress concentration when the pore was just buried underneath the surface, but with a lowered value than that of the linear elastic model. These results were consistent with the experimental observations that fatigue cracks were preferably initiated from pores and particles, which were just intercepted at their top with the sample surface or just buried beneath the surface.

References

  1. 1.
    H.R. Ammar, A.M. Samuel, and F.H. Samuel: Mater. Sci. Eng. A, 2008, vol. 473, pp. 65–75.CrossRefGoogle Scholar
  2. 2.
    Q.G. Wang, D. Apelian, and D.A. Lados: J. Light Met., 2001, vol. 1, pp. 73–84.CrossRefGoogle Scholar
  3. 3.
    M.T. Todinov: Mater. Sci. Eng. A, 1998, vol. 255, pp. 117–23.CrossRefGoogle Scholar
  4. 4.
    B. Atzori, G. Meneghetti, and L. Susmel: Eng. Fract. Mech., 2004, vol. 71, pp. 759–68.CrossRefGoogle Scholar
  5. 5.
    J. Linder, M. Axelsson, and H. Wilsson: Int. J. Fatigue, 2006, vol. 28, pp. 1752–58.CrossRefGoogle Scholar
  6. 6.
    J.Z. Yi, Y.X. Gao, P.D. Lee, H.M. Flower, and T.C. Lindley: Metall. Mater. Trans. A, 2003, vol. 34A, pp. 1879–90.CrossRefGoogle Scholar
  7. 7.
    Y.B. Zhang, J.H. Xu, and T. Zhai: Mater. Sci. Eng. A, 2010, vol. 527, pp. 3639–44.CrossRefGoogle Scholar
  8. 8.
    J.E. Bozek, J.D. Hochhalter, M.G. Veilleux, M. Liu, G. Heber, S.D. Sintay, A.D. Rollett, D.J. Littlewood, A.M. Maniatty, H. Weiland, R.J. Christ, Jr., J. Payne, G. Welsh, D.G. Harlow, P.A. Wawrzynek, A.R. Ingraffea (2008). Model. Simul. Mater. Sci. Eng.16:1–28.CrossRefGoogle Scholar
  9. 9.
    S. Benedictus-deVries, A. Bakker, G.C.A.M. Janssen, and H. de Wit: J. Eng. Mater. Technol.-Trans. ASEM, 2004, 2004, vol. 126, pp. 199–203.Google Scholar
  10. 10.
    H.T. Pang and P.A.S. Reed: Int. J. Fatigue, 2003, vol. 25, pp. 1089–99.CrossRefGoogle Scholar
  11. 11.
    J.H. Fan, D.L. McDowell, M.F. Horstemeyer, and K. Gall: Eng. Fract. Mech., 2003, vol. 70, pp. 1281–1302.CrossRefGoogle Scholar
  12. 12.
    Y.X. Gao, J.Z. Yi, P.D. Lee, and T.C. Lindley: Fatigue Fract. Eng. Mater. Struct., 2004, vol. 27, pp. 559–70.CrossRefGoogle Scholar
  13. 13.
    P. Li, P.D. Lee, D.M. Maijer, and T.C. Lindley: Acta Mater., 2009, vol. 57, pp. 3539–48.CrossRefGoogle Scholar
  14. 14.
    A. Fatemi and D. Socie: Fatigue Fract. Eng. Mater. Struct., 1988, vol. 11, pp. 145–65.Google Scholar
  15. 15.
    D.L. McDowell: Int. J. Fract., 1996, vol. 80, pp. 103–45.CrossRefGoogle Scholar
  16. 16.
    M.J. Couper, A.E. Neeson, and J.R. Griffith: Fatigue Fract. Mater. Struct., 1990, vol. 13, pp. 213–27.CrossRefGoogle Scholar

Copyright information

© The Minerals, Metals & Materials Society and ASM International 2011

Authors and Affiliations

  1. 1.College of Mechanical Engineering, Yanshan UniversityQinhuangdaoP.R. China
  2. 2.Department of Chemical and Materials EngineeringUniversity of KentuckyLexingtonUSA

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