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Nonlocal FEM Simulations of Ductile Damage with Regularized Crack Path Predictions Научная публикация

Конференция 22ND WINTER SCHOOL ON CONTINUOUS MEDIA MECHANICS
22-26 мар. 2021 , Пермь
Журнал Journal of Physics: Conference Series
ISSN: 1742-6588
Вых. Данные Год: 2021, Том: 1945, Номер: 1, Номер статьи : 012018, Страниц : 9 DOI: 10.1088/1742-6596/1945/1/012018
Авторы Klyuchancev V S 1,2 , Shutov A V 1,2
Организации
1 Lavrentyev Institute of Hydrodynamics
2 Novosibirsk State University

Реферат: Constitutive equations of finite strain elasto-plasticity are coupled to continuum damage mechanics to simulate the initiation and propagation of cracks in ductile materials. The diffuse deterioration of material's strength is modelled using porosity as a damage parameter. We show that the local damage model yields simulation results, pathologically dependent on the FEM mesh upon mesh refinement: (i) the structural behaviour becomes unrealistically brittle; (ii) the FEM mesh determines the crack path. To solve these problems, an integral-based approach to nonlocal damage is implemented. It enables physically sound results by introducing the linear size of the microstructure into the model's formulation. To prevent the effect of unrealistic diffusion of damage, the averaging operator is applied not to the porosity, but to its dual parameter, material's continuity. Solutions of test problems for crack propagation in a compact tension specimen are presented. The convergence of FEM solutions is demonstrated for different slopes of the mesh with fine and coarse discretizations.
Библиографическая ссылка: Klyuchancev V.S. , Shutov A.V.
Nonlocal FEM Simulations of Ductile Damage with Regularized Crack Path Predictions
Journal of Physics: Conference Series. 2021. V.1945. N1. 012018 :1-9. DOI: 10.1088/1742-6596/1945/1/012018 Scopus РИНЦ OpenAlex
Идентификаторы БД:
Scopus: 2-s2.0-85109216230
РИНЦ: 46889278
OpenAlex: W3176362734
Цитирование в БД:
БД Цитирований
Scopus 5
OpenAlex 5
РИНЦ 5
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