Simulation of ceramics fracture due to high rate dynamic impact

30th International Conference on Interaction of Intense Energy Fluxes with Matter

Kazarinov, N.A.^1 ; Bratov, V.A.^1 ; Petrov, Y.V.^1

Saint-Petersburg State University, Universitetsky 26, Petrodvorets, Saint-Petersburg

198504, Russia^1

关键词: Dynamic fracture process;    Dynamic fractures;    Fracture initiation;    Fracture process;    Fracture surface area;    High rate deformation;    High speed impact;    Incubation time criterions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/653/1/012050/pdf
DOI  :  10.1088/1742-6596/653/1/012050

来源: IOP

【 摘 要 】

In this paper dynamic fracture process due to high-speed impact of steel plunger into ceramic sample is simulated. The developed numerical model is based on finite element method and a concept of incubation time criterion, which is proven applicable in order to predict brittle fracture under high-rate deformation. Simulations were performed for ZrO2(Y2O3) ceramic plates. To characterize fracture process quantitatively fracture surface area parameter is introduced and controlled. This parameter gives the area of new surface created during dynamic fracture of a sample and is essentially connected to energetic peculiarities of fracture process. Multiple simulations with various parameters made it possible to explore dependencies of fracture area on plunger velocity and material properties. Energy required to create unit of fracture area at fracture initiation (dynamic analogue of Griffith surface energy) was evaluated and was found to be an order of magnitude higher as comparing to its static value.