Issue 75

P.V. Trusov et al., Fracture and Structural Integrity, 75 (2026) 463-477; DOI: 10.3221/IGF-ESIS.75.31

Modified elastic-plastic model: implementation algorithm and comparison of computational efficiency with the elastic-viscoplastic model

P.V. Trusov, P.A. Gladkikh Perm National Research Polytechnic University, Russia tpv@pstu.ru, https://orcid.org/0000-0001-8997-5493 gladkikh.p@yandex.ru ,https://orcid.org/0009-0004-9635-0191

Citation: Trusov, P.V., Gladkikh P.A., Modified elastic-plastic model: implementation algorithm and comparison of computational efficiency with the elastic viscoplastic model, Fracture and Structural Integrity, 75 (2026) 463-477.

Received: 12.11.2025 Accepted: 05.12.2025 Published: 16.12.2025 Issue: 01.2026

Copyright: © 2026 This is an open access article under the terms of the CC-BY 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

K EYWORDS . Elastic-plastic model, Uncertainty of the choice of active slip systems, Computational efficiency.

I NTRODUCTION

espite the intense integration of polymer and composite materials into modern manufacturing, metal and alloy products remain in high demand in different industries. The constantly evolving range of alloys and alloy-based products, the severe requirements for their operational characteristics, and the need to rapidly develop manufacturing technologies (mostly, by applying plastic deformation methods) are a strong motive for creating mathematical models (MM), which can adequately describe thermomechanical processing (TMP) of metallic materials. The “heart” of such MMs, determining their adequacy and accuracy, are the constitutive models (CM) (constitutive relations (CR)) used for their formulation. Up to now, the processes of plastic working of metals and alloys are normally described by the mathematical models that are based on classical macrophenomenological theories of plasticity (MPT) [1 and others]. Unfortunately, the classical D

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