A Numerical Study of the Effect of Isotropic Hardening Parameters on Mode I Fatigue Crack Growth

The consideration of plastic crack tip opening displacement (CTOD, <i>&#948;</i>_p), as a crack driving force has given us the opportunity to predict fatigue crack growth (FCG) rate numerically, and, therefore, to develop parametric studies focused on the effect of loading, geometrical, and material parameters. The objective here is to study the effect of the isotropic hardening parameters of the Voce law on FCG, which are the isotropic saturation stress, <i>Y</i>_Sat, and the isotropic saturation rate, <i>C</i>_Y. The increase of these hardening parameters causes <i>&#948;</i>_p to decrease. However, this effect is much more pronounced for <i>Y</i>_Sat than <i>C</i>_Y. The variation is non-linear, and the rate of variation decreases with the increase of isotropic parameters. The increase of <i>Y</i>_Sat increases the crack closure phenomenon. Finally, the influence of the isotropic parameters is more relevant for pure isotropic hardening than for mixed hardening.

Abstract licence: CC BY

A person counts once a day per paper. We keep no cookie and no address: a reader is a hash that changes every day. Any month under five reads shows no number.