PSI - Issue 33

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000–000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 33 (2021) 871–877

© 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the IGF ExCo Abstract The work is aimed to investigation the possibility of taking into account the processes of localization of deformations in the form of a "neck" under conditions of uniaxial tension of cylindrical samples in numerical simulation. The features of the experimental study and numerical modeling of the postcritical stage of deformation of structural steels with the localization of deformations in the form of a "neck" are considered. The formulation of a physically nonlinear boundary value problem of modeling a sample with allowance for postcritical deformation is considered using the ANSYS applied engineering analysis package. Geometric models of the studied objects are constructed, a description of the chemical composition and main mechanical characteristics of the material used is given, the parameters of discretization of the computational domain onto a finite element mesh are selected, the boundary and initial conditions are formulated, and the calculation parameters are determined. Numerical modeling of the processes of elastoplastic and postcritical deformation of a solid cylindrical sample made of 40Cr structural steel has been implemented. For each solution of the problem, the stress and strain fields are obtained, the change in the geometric shape of the sample in the process of stretching, graphs of the dependences of the conditional stresses on the elongation of the sample are plotted. The analysis of the elastoplastic behavior of a smooth cylindrical specimen and a specimen with an inherent constriction in the center of the working part is carried out. The analysis of the obtained data of numerical modeling is carried out and a comparison with experimental data is carried out, which demonstrates the possibility of modeling the processes of postcritical deformation of samples under conditions of the occurrence of localization of deformations in the form of a "neck". © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review Statement: Peer-review under responsibility of the scientific committee of the IGF ExCo IGF26 - 26th International Conference on Fracture and Structural Integrity Computational and experimental study of strain localization processes on the postcritical stage of deformation Tretyakov M.P. a *, Wildemann V.E. a , Tretyakova T.V. a , Safronov S.A. b a Center of Experimental Mechanics of Perm National Research Polytecnic University, 29, Komsomolskiy Ave., Perm, 614990, Russia b Department of Experimental Mechanics and Structural Materials Science of Perm National Research Polytecnic University, 29, Komsomolskiy Ave., Perm, 614990, Russia

* Corresponding author. Tel.: +7-902-641-5560. E-mail address: cem_tretyakov@mail.ru

2452-3216 © 2021 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review Statement: Peer-review under responsibility of the scientific committee of the IGF ExCo

2452-3216 © 2021 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the IGF ExCo 10.1016/j.prostr.2021.10.097