TY - CONF

T1 - Geometrically exact integral-based nonlocal model of ductile damage: Numerical treatment and validation

AU - Shutov, Alexey V.

AU - Klyuchantsev, Vladislav S.

N1 - Publisher Copyright: © 2021 COMPLAS 2021 - 16th International Conference on Computational Plasticity: Fundamentals and Applications. All rights reserved.

PY - 2021

Y1 - 2021

N2 - 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.

AB - 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.

KW - Ductile Damage

KW - FEM

KW - Large Strain

KW - Nonlocal Damage

KW - Plasticity

KW - Validation

UR - http://www.scopus.com/inward/record.url?scp=85135628256&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:85135628256

T2 - 16th International Conference on Computational Plasticity: Fundamentals and Applications, COMPLAS 2021

Y2 - 7 September 2021 through 10 September 2021

ER -