Proposal of a fatigue crack propagation model taking into account crack closure effects using a modified CCS crack growth model

Abstract This paper proposes a modification of the fatigue crack growth model proposed by Castillo-Canteli-Siegele (CCS) to take into account crack opening and closure effects as well as the influence of the stress R -ratio. The theoretical model to obtain the effective stress intensity range, ΔK eff , which takes into account the effects of the mean stress and the crack closure and opening effects proposed by Correia et al . was taken in consideration in this new proposal. This last model is based on the same initial assumptions of the analytical models proposed by Hudak et al. and Ellyin . This modified CCS crack propagation model is a new version of an explicit fatigue crack propagation model, supported by mathematical and physical assumptions.

[1]  Michael Vormwald,et al.  Effect of cyclic plastic strain on fatigue crack growth , 2016 .

[2]  S. M. Beden,et al.  Review of fatigue crack propagation models for metallic components , 2009 .

[3]  J. Newman.  A crack opening stress equation for fatigue crack growth , 1984 .

[4]  M. Dankert,et al.  AN ANALYTICAL PROCEDURE FOR PREDICTING OPENING LOADS OF CRACKS AT NOTCHES , 1995 .

[5]  S. Atluri,et al.  FATIGUE CRACK CLOSURE AND DELAY EFFECTS UNDER MODE I SPECTRUM LOADING: AN EFFICIENT ELASTIC–PLASTIC ANALYSIS PROCEDURE , 1979 .

[6]  N. Geerlofs,et al.  On the Paris coefficient and crack closure effects of Alporas aluminum foam , 2003 .

[7]  A. Hartman,et al.  The effects of environment and load frequency on the crack propagation law for macro fatigue crack growth in aluminium alloys , 1970 .

[8]  Alfonso Fernández-Canteli,et al.  Obtaining S–N curves from crack growth curves: an alternative to self-similarity , 2014, International Journal of Fracture.

[9]  Paulo J. Tavares,et al.  Fatigue Life Prediction Based on Crack Growth Analysis Using an Equivalent Initial Flaw Size Model: Application to a Notched Geometry , 2015 .

[10]  T. Seeger,et al.  THE CONSEQUENCES OF SHORT CRACK CLOSURE ON FATIGUE CRACK GROWTH UNDER VARIABLE AMPLITUDE LOADING , 1991 .

[11]  Alfonso Fernández-Canteli,et al.  Fatigue characterization of a crankshaft steel: Use and interaction of new models , 2015 .

[12]  Paulo J. Tavares,et al.  Crack Closure Effects on Fatigue Crack Propagation Rates: Application of a Proposed Theoretical Model , 2016 .

[13]  R. C. McClung,et al.  Characterization of fatigue crack growth in intermediate and large scale yielding , 1991 .