PSI - Issue 6

Ekaterina L. Alekseeva et al. / Procedia Structural Integrity 6 (2017) 128–133 E.A. Alekseeva et al. / Structural Integrity Procedia 00 (2017) 000–000

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regularities. The proposed mathematical model makes possible to obtain an inhomogeneous quasiperiodic distribution of plastic strains at the macrolevel. The result was obtained for the analysis of the stress-strain state in the three-dimensional formulation. It is shown that when the proposed model is used in the case of a slow quasistatic tension of the sample, the strain distribution on the surface remains the same with an increase in the level of local plastic strains. Separately, it should be noted that in the case of three-dimensional modeling, due to the induced anisotropy in the material, the direction of the plastic strain bands on the sample surface does not correspond to the direction of the maximum tangential stresses. It is shown that the inhomogeneous plastic strain field distribution can be caused by the inhomogeneity of the material, which is related, in particular, to the inhomogeneity of its micro- and mesostructure. A complete correspondence with the experiment is obtained, which confirms the adequacy of the models used.

Acknowledgements

The research was carried out in the framework of project No. 15-19-00091 of the Russian Science Foundation. The financial support by the Russian Science Foundation is gratefully acknowledged.

References

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