PSI - Issue 57

3

Amira Aboussalih et al. / Procedia Structural Integrity 57 (2024) 848–858 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

850

3. Verification of the Model The Chaboche model adopted in this study is based on the association of two nonlinear isotropic and kinematic hardening, in order to describe the behaviour of 316L. The parameters of the Chaboche model used in this study are those obtained from the works of Flavien & al. (2012) for 316L which will be implemented in the Zebulon calculation code [39], see Table 1.

Table 1. Parameters of Chaboche model for 316L SS

γ

σ y (MPa)

Q (MPa)

b

C (MPa)

E (GPa)

 (-)

316 L

190

0.3

110

90

0.3

112.500

580

Before starting the simulation, it is imperative to carry out a comparison between the first prediction hysteresis curve and the experimental cyclic curve, carried out between ± 0.5% at imposed deformation with a traction-compression cycle, in order to ensure the credibility of the parameters of the 316L material chosen. Figure 1 presents a superposition of the experimental cyclic curve and the simulation curve for a cycle calculated by the finite element calculator code ZéBulon. We notice a concordance between the cyclic hysteresis loops of each test.

300

Simulation Experiment

200

100

-300 Axial Strain  xx (MPa) -200 -100 0

-0,006 -0,004 -0,002 0,000 0,002 0,004 0,006 -400

Axial Strain  xx ( % )

Fig 1. Comparison of first cycle hysteresis loop obtained from experiment and simulation, ± 0.5 % strain amplitude for 316L SS