Numerical Evaluation of Residual Stress Influence on SIF in CT Specimen

Residual stresses are usually associated with induced by heterogeneous deformations as a cause of phase transition and thermal stress. The residual can appear during the manufacturing process, repair or in some cases due to operational loads. These should be taken into account structural integrity evaluation low-toughness materials case fatigue and/or stress corrosion cracking (SCC) situations. Indeed, it is known that affect crack growth rates. For better understanding how these interact propagation pre-strained stainless-steel specimens, numerical modeling has been performed. tension compact (CT) specimen was simulated result, intensity factor (SIF) calculated. main goal this paper numerically calculate factors along front CT compare them results same just without stresses. task finite element analysis (FEA), code CAST3M used. Simulation showed higher SIF values were calculated at sides lower middle part machined from highly plate which opposite what could expected