PSI - Issue 57

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Author name / Structural Integrity Procedia 00 (2019) 000 – 000

Amira Aboussalih et al. / Procedia Structural Integrity 57 (2024) 848–858

858

0,27

0 Maximum Axial Strain  xx () 20 -0,18 -0,09 0,00 0,09 0,18

 mean = 75 MPa  a = 225 MPa  a = 200 MPa  a = 175 MPa

40

60

80

100

Number of cycles

Fig .12. Axial strain peaks versus the number of cycles in

5. Conclusion Our investigation through this work, is presented in analysis of the elastoplastic behavior of steel 316L under alternative loading in deformation and in imposed constraint. In a first place, we solicited the steel for a uniaxial loading path, in order to predict its response under imposed strain, the numerical results obtained were used, to illustrate cyclic hysteresis curves. In a second place, we loaded the steel under imposed stress In the light of the results obtained, we have detected that the steel exhibits over-hardening caused by the increase in stress as a function of the number of cycles in the case of bidirectional loading under strain controlled.Emphasis is placed on the fatigue induced by the ratcheting phenomenon and the impact of the average stress and its acceleration.We found that the ratchet increases with the average stress when the stress amplitude is constant and decreases with the attenuation of the stress amplitude when the average stress is constant. References Belattar.A, Taleb. L,(2021). Experimental and numerical analyses of the cyclic behavior of austenitic stainless steels after prior inelastic histories.International Journal of Pressure Vessels and Piping 189,104256. Boussalih. F, Meziani. S, Fouathia A and Fedaoui. K, (2019).Behavior of 304l stainless steel under uniaxial loading and effect of the mean stress on the ratcheting by simulation using Chaboche model. U.P.B. Sci. Bull., Series D 81,1454-2358 . Boussalih.F, Fedaoui.K, Zarza.T,(2022). Fatigue by Ratcheting Phenomena of Austenitic Stainless Steels Under Biaxial Sinusoidal Loading using the nonlinear hardening model. Civil Engineering Journal (E-ISSN: 2476- 3055; ISSN ,8, 2676-6957. Kulkarni, SC, Desai, Y.M, Kant,T. Reddy,G.R.Prasad.,P. Vaze, K.K. Gupta, C , (2004).Uniaxial and biaxial Ratchetting in piping materials experiments and analysis. International Journal of Pressure Vessels and Piping 81, 609 – 617. Lin. Y.C, Xiao-Min Chen and Gang Chen.,(2011). Uniaxial ratcheting and low-cycle fatigue failure behaviors of AZ91D magnesium alloy under cyclic tension deformation. Journal of Alloys and Compounds 509 , 6838 – 6843. Marco .A. M, Jaime.T. P de Castro, Hao.W, Eleazar .C.M. S,(2016).A general class of non-linear kinematic models to predict mean stress relaxation and multiaxial ratcheting in fatigue problems – Part II: Generalized surface translation rule. International Journal of Fatigue 82, Part 2, 167-178. Mazánová.V ,Polák . J ,Škorík . V and Kruml .T ,(2017).Multiaxial Elastoplastic Cyclic Loading of Austenitic 316L Steel. Frattura ed Integrità Strutturale 40, 162-169.