Multilevel modeling of damage accumulation processes in metals

International Conference "Modern Technologies and Materials of New Generations"

Kurmoiartseva, K.A.^1 ; Trusov, P.V.^1 ; Kotelnikova, N.V.^1

Department of Mathematical Modeling of Systems and Processes, Perm National Research Polytechnic University, 29 Komsomolsky prospekt, Perm

614990, Russia^1

关键词: Crack nucleation;    Crystal plasticity;    Damage accumulation;    Dislocation models;    Multiscale process;    Physical mechanism;    Self organizations;    Strain localizations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/286/1/012018/pdf
DOI  :  10.1088/1757-899X/286/1/012018

来源: IOP

【 摘 要 】

To predict the behavior of components and constructions it is necessary to develop the methods and mathematical models which take into account the self-organization of microstructural processes and the strain localization. The damage accumulation processes and the evolution of material properties during deformation are important to take into account. The heterogeneity of the process of damage accumulation is due to the appropriate physical mechanisms at the scale levels, which are lower than the macro-level. The purpose of this work is to develop a mathematical model for analyzing the behavior of polycrystalline materials that allows describing the damage accumulation processes. Fracture is the multistage and multiscale process of the build-up of micro- and mesodefects over the wide range of loading rates. The formation of microcracks by mechanisms is caused by the interactions of the dislocations of different slip systems, barriers, boundaries and the inclusions of the secondary phase. This paper provides the description of some of the most well-known models of crack nucleation and also suggests the structure of a mathematical model based on crystal plasticity and dislocation models of crack nucleation.