A new model for the analysis of fatigue crack growth in the metal structures was proposed. This model shows a promising capability of explaining various fatigue phenomena. The new crack growth model is further completed by a continuous empirical formula for estimating the value of variable fracture toughness during crack propagation and a modified continuous equation for the crack tip stress/strain constraint factor used to calculate the stress intensity factor at the opening level. The predictionresults are proved to agree well with the observed phenomena in test.
参考文献
| [1] | J. Schijve .Fatigue of structures and materials in the 20th century and the state of the art[J].International Journal of Fatigue,2003(8):679-702. |
| [2] | H. Bao;A. J. McEvily .On plane stress-plane strain interactions in fatigue crack growth[J].International Journal of Fatigue,1998(6):441-448. |
| [3] | S. Ishihara;A.J. McEvily .Analysis of short fatigue crack growth in cast aluminum alloys[J].International Journal of Fatigue,2002(11):1169-1174. |
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