Applying strain energy density factor theory for propagation estimating of surface crack in tubular T-joints : Quin, R.J. (Shanghai Jiaotong University) Eng. Fract. Mech. (Apr. 1996) 53 (6), 849–858

Abstract

The growth rates of microstructurally short fatigue cracks often appear to show less sensitivity to length than would be expected on the basis of a relaxed microstructure. In addition to stress enhancements provided by dislocation theory, recently purely elastic mechanisms have been shown to generate stress singularities as well. Incorporation of such singularities into a Monte Carlo simulation of an evolving microcrack distribution improves the ability of the model to replicate actual distributions obtained experimentally for 304 stainless steel. Furthermore, it allows the use of a single set of Paris constants for both long and short cracks.