Near-tip residual stress as an independent load interaction mechanism

Sunder, R.; Raut, D. N.; Jayaram, Vikram; Kumar, Praveen; Shastri, Vijayendra

doi:10.1016/j.ijfatigue.2021.106364

Cited by 11 publications

(2 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Despite the controversy in this matter, 33 crack closure has been observed experimentally [34][35][36][37] and shown to be dominant over residual stresses in the Paris Regime, whereas, in the threshold region, the opposite is expected to occur. 38 The crack closure level was increased by considering growth and nucleation of micro-voids because the porous damage accumulation rises both the size of the plastic zone ahead of the crack tip and the intensity of plastic deformation. 31 Higher plastic strains increase the plasticity-induced crack closure (PICC), 39 which is one of the main crack closure mechanisms.…”

Section: Introductionmentioning

confidence: 99%

“…The growth and nucleation of micro‐voids was shown to influence da/dN and crack closure itself, exposing an interdependency of mechanisms at the crack tip. Despite the controversy in this matter, 33 crack closure has been observed experimentally 34–37 and shown to be dominant over residual stresses in the Paris Regime, whereas, in the threshold region, the opposite is expected to occur 38 . The crack closure level was increased by considering growth and nucleation of micro‐voids because the porous damage accumulation rises both the size of the plastic zone ahead of the crack tip and the intensity of plastic deformation 31 .…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Fatigue crack growth modeling considering a hybrid propagation strategy

Sérgio

Antunes

Neto

2023

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

Fatigue results from the occurrence of several damage mechanisms and their interactions. The cyclic plastic strain and damage accumulation at the crack tip are widely pointed as the main agents behind fatigue crack growth (FCG). In this work, the authors propose the prediction of FCG through a node release numerical model that offers several possibilities regarding the modeling of the mechanisms behind fatigue. A hybrid propagation method is presented where both cumulative plastic strain and porous damage represent parallel propagation criteria. Accordingly, the node is released once either a critical plastic strain or a critical porosity, at the crack tip, is reached. The Gurson–Tvergaard–Needleman (GTN) damage model is employed to predict porous damage evolution through the processes of nucleation and growth of micro‐voids. The model is validated through comparison with experimental data for the AA2024‐T351 aluminum alloy. Finally, the interactions between plastic strain, porous damage, crack closure, and stress triaxiality are accessed.

show abstract