PSI - Issue 22

N. Makhutov et al. / Procedia Structural Integrity 22 (2019) 93–101 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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depicted by the points. Results of calculation according to equations (21) and (22) are shown by solid lines. These calculations were carried out with accounting for the 8-18% increase of the resistance to plastic deformation due to triaxial stress state in the notch zone. This figure demonstrates a good agreement between results of calculations according to equations (21)-(23) and experimental results for a wide range of strains (regions II and III). Several different materials, notch geometries and types of loading have been considered and similar agreement between theory and experiment was achieved. 3. Conclusions The proposed approach allows describing the performance of the notched components not only under normal loading regimes that cause limited plasticity with maximum notch strains laying in the range ε Y < ε max < 5ε Y but also to predict its behavior when it is subjected to extreme loads that may cause extensive plastic deformations that may reach up to 20 ε Y . This model is helpful for making express assessments of the notch stress-strain response in a wide rang of applied nominal strains and for verification of FEM assessment. Acknowledgments This work is financially supported by the Russian Foundation for Basic Research (grant 16-58-48008 IND_omi). References Adibi-Asl R., Seshadri R. 2009. Improved Prediction Method for Estimating Notch Elastic-Plastic Strain. Journal of Pressure Vessel Technology. 135(4):041203-041203-9. Bannantine J., Comer J, Handrock J. 1990. Fundamentals of metal fatigue analysis. Prentice Ney Jersey. Hall edition, pp. 271. Makhutov N. 1981. Strain-based Fracture Criteria and Structural Strength Design. Mashinostroeniye publ, Moscow, pp. 271 (in Russian). Makhutov N. 2008. Strength and Safety. Basic and Applied Research. Nauka publ. Novisibirsk. pp 528 (in Russian). Makhutov N., Reznikov D. 2018. Methods for Assessment of Stress-Strain States in Stress Concentration Zones in Regular and Accident Loading Conditions. Problems of Safety and Emergency Situations. 4, 3-28 (in Russian) Makhutov N., Reznikov. D. 2019. Generalization of Neuber’s Rule for the Assessment of Local Stresses and Strains in Stress Concentration Zones for a Wide Range of Applied Strains. Procedia Structural Integrity 14 199 – 206 Manson S., Halford G. 2006. Fatigue and Durability of Structural Materials. USA. ASM International., pp. 455 Neuber, H., 1961. Theory of stress concentration for shear-strained prismatical bodies with arbitrary nonlinear stress – strain law. J. Appl. Mech. 28, 544 – 550