Numerical Simulation of Fatigue Crack Initiation in Thin-walled High Strength Steel as Modeled by Voronoi-polygons

Applicability of the Multiscale Model for Predicting Fatigue Strength to Short and Long Crack Problems

“…Note that we did not intentionally distinguish the regimes of SC and LC, nor did we use any adjustable parameters. Basically, we applied a unified theory, known as crack/ grain-boundary interaction theory proposed by Tanaka, 22) which has been only applied to simulate small crack growth 26,27) but validated to be effective as one factor of our multiscale model for predicting the LC problem in this study. In other words, our model is applicable to both microstructurally SC and LC in ferrite-pearlite steel based on a multiscale model synthesis approach.…”

Towards a grain-scale modeling of crack initiation in rolling contact fatigue – Part 1: Shear stress considerations

“…Different values of the material properties can be found in the literature, therefore, Table 1 compiles ranges given for bearing steels [13,14,15,36,39,40]. Therefore, parameters and which are functions of the material properties can vary according to Table 2.…”

“…Recent studies have proposed implementations of the Tanaka-Mura law in mesoscopic numerical model using Voronoi tessellations. Bruckner-Foit et al [12,13] studied the fatigue crack threshold on martensitic steel and Toyoda et al [14] on thin-walled high strength steel. Hilgendorff et al [15] used boundary element method to compute stress field and Briffod et al [16] investigated crack initiations in pure iron aggregate.…”