10.18720/MCE.69.1
Andrey Levandovskiy
Boris Melnikov
Artemiy Shamkin
Modeling of porous material fracture
Санкт-Петербургский политехнический университет Петра Великого
2017
research paper
porous material
fracture
tomography
element deletion
element erosion
element size
fracture criterion
finite element
cordierite
cubic elements
пористый материал
разрушение
томография
удаление элементов
разрушение элементов
размер элемента
критерий разрушения
конечный элемент
кордиерит
кубические элементы
2017
Wide use of various porous materials in construction engineering applications requires development of up to date methods of non-destructive characterization and optimization of such materials. This work explores an approach to modeling of fracture of a brittle porous material. Available 3D digital data on the specimen geometry is converted into uniform finite element mesh consisting purely of elements of cubic shape. Fracture model is based on a series of linear solutions. Thus approach to linear modeling described in the previous papers could be utilized. Fracture is modeled by consecutive element erosion. A special element erosion criterion is established to avoid finite element size dependency. Two speed-up algorithms are proposed and tested. The approach described can be used for modeling fracture of uniform construction materials, also materials with inclusions under various mechanical and thermal loads.