Predictions of Fatigue Crack Propagation Path and Life of High-Tension Steel in Residual Stress Fields.

Mixed mode fatigue crack initiation and growth in a CT specimen repaired by stop hole technique

“…Ohji et al [19] presented the validation of fatigue modified maximum tangential stress criterion for FCG in the case of the high-tension steel in the residual stress field. According to the mixed mode condition of the crack growth, an equivalent SIF must be used [20,21], The equivalent SIF range DK of the mixed-mode I and II crack is considered to be…”

Predictions of Propagation Behavior of Semi-Elliptical Slant Surface Cracks in Residual Stress Fields Based on Simulations of the Partial Elastic Contact of Crack Surfaces

“…(1) The initial residual stress distribution is introduced to the finite element elastic analysis (11) by applying the equivalent nodal force in correspondence with initial strains.…”

“…Barsoum's singular elements (14) are arranged around the crack tip. The initial residual stress was introduced to the finite element method by applying an equivalent nodal force in correspondence with an initial strain to each finite element (11) . The displacement method was adopted for evaluating the stress intensity factor.…”

Multiaxial high-cycle fatigue criterion considering crack initiation and non-propagation

“…Ohji et al confirmed that a crack in a residual stress field grows in the direction of the maximum stress intensity factor range, and that crack growth behavior is controlled by the effective stress intensity factor range for the crack growth direction [20]. On the Table 1 Experimental and predicted results for hard steel [23].…”