PSI - Issue 31

V. Romanova et al. / Procedia Structural Integrity 31 (2021) 64–69 V. Romanova et al. / Structural Integrity Procedia 00 (2019) 000–000

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strain range even the reference model is valid to reproduce the mesoscale deformation phenomena, which is acceptable in many cases.

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Fig. 4 Roughness profiles on the top (a) and lateral surfaces (b) of the model shown in Fig. 2a and the stress-strain curves calculated for polycrystalline models of different sizes compared with the experiment [XX]. 4. Conclusion The problem of the RVE definition at the mesoscale has been examined on the example of four polycrystalline models. CPFEM simulations of uniaxial tension were performed for polycrystals with different sizes and grain numbers. A basal texture and grain shape fitted experimental data for a commercially pure titanium alloy. A comparative analysis of the calculation results suggested a conclusion that all the grain models are capable of reproducing the mesoscale phenomena but until the plastic strain localizes at the scale comparable to the model size. As soon as plastic strain localization is unable to involve a larger scale, the model fails to describe the mesoscale deformation phenomena in a proper way. Acknowledgments This work is supported by Russian Science Foundation (Project No. 20-19-00600). References Baragetti, S., Borzini, E., Božić, Ž., Arcieri, E.V., 2019a. Fracture surfaces of Ti-6Al-4V specimens under quasi-static loading in inert and aggressive environments, Engineering Failure Analysis 103, 132. Baragetti, S., Borzini, E., Božić, Ž., Arcieri, E.V., 2019b. On the fatigue strength of uncoated and DLC coated 7075-T6 aluminum alloy, Engineering Failure Analysis 102, 219. Baragetti, E., Božić, Ž., Arcieri, E.V., 2020. Stress and fracture surface analysis of uncoated and coated 7075-T6 specimens under the rotating bending fatigue loading, Engineering Failure Analysis 112, 104512. Diard, O., Leclercq, S., Rousselier, G., Cailletaud, G., 2005. Evaluation of finite element based analysis of 3D multicrystalline aggregates plasticity. Application to crystal plasticity model identification and the study of stress and strain fields near grain boundaries, Int. J. Plast. 21, 691. Eremin, M.O., Deryugin, E.E., Schmauder, S., 2020. Evaluation of fracture toughness of zrO2 − 3.0 mol%Y2O3 ceramics utilizing wedge splitting loading of double cantilever specimen with a chevron notch, Engineering Failure Analysis 110, 104409. Kardashev, B.K., Narykova, M.V., Betekhtin, V.I. et al., 2020. Evolution of elastic properties of Ti and its alloys due to severe plastic deformation. Phys Mesomech 23, 193. Meshcheryakov, Y.I., Zhigacheva, N.I., Konovalov, G.V. et al., 2020. Multiscale Mesostructure Formation under Impact Loading, Phys Mesomech 23, 231 Panin, A. V., Kazachenok, M. S., Perevalova, O. B., Sinyakova, E. A., Krukovsky, K. V., Martynov, S. A., 2018. Multiscale deformation of commercial titanium and Ti 一 6Al-4V alloy subjected to electron beam surface treatment, Phys. Mesomech. 21, 441. Panin, V.E., Ovechkin, B.B., Khayrullin, R.R. et al., 2020, Effect of the lattice curvature of Ti-6Al-4V titanium alloys on their fatigue life and fracture toughness, Phys Mesomech 23, 369. Papadopoulou, S., Pressas, I., Vazdirvanidis, A., Pantazopoulos, G., 2019. Fatigue failure analysis of roll steel pins from a chain assembly: Fracture mechanism and numerical modeling, Engineering Failure Analysis 101, 320.