Abstract: The applicability of a previously proposed finite strain model of nonlocal damage is analyzed. The model kinematics is based on the multiplicative decomposition of the deformation gradient into three parts: porosity-induced dilatation, elastic strain, and plastic strain. The nonlocality is introduced by integral-based averaging operator, applied to the so-called continuity parameter, which is dual to porosity. Withing the advocated modelling framework, basic principles like objectivity and thermodynamic consistency are satisfied. Using a home-made FEM code, we compare simulation results with actual experimental data regarding crack initiation and propagation. The underlying problem of destruction of a plate with a hole is considered, naturally involving large inelastic deformations prior to strain localization. The plate’s material is Russian structural steel 20. A quantitative comparison is carried out in terms of force-displacement curves. Experimentally measured strain distributions and crack growth are used for a qualitative validation of the nonlocal model.

Cite: Shutov A.V. , Klyuchantsev V.S.
GEOMETRICALLY EXACT INTEGRAL-BASED NONLOCAL MODEL OF DUCTILE DAMAGE: NUMERICAL TREATMENT AND VALIDATION
In compilation XVI International Conference on Computational Plasticity. Fundamentals and Applications. COMPLAS 2021. 2021. – C.1-12. DOI: 10.23967/complas.2021.034 Scopus РИНЦ OpenAlex

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Scopus:	2-s2.0-85135628256
Elibrary:	68578373
OpenAlex:	W4214543446

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