Julita Czopor’s research while affiliated with Wrocław University of Science and Technology and other places

Ceramics is widely used material in engineering practice because of its great strength, high heat resistance and low density. The strength is a subject of our investigations. It can be significantly decreased by small defects, such as scratches, inclusions, pores, and surface roughness. The aim of this article is to demonstrate an application of the Movable Cellular Automata (MCA) method in 3D to simulate static compression test of ceramic material with various type of defects. As results we can observe damage evolution and cracks propagation leading to sample failure.

Method called movable cellular automata (MCA) is used to modelling a process of defects growth in elastic‐brittle material. Fractures is one of the main problem in the strength material research. Chosen elastic‐brittle material is Beryllium Oxide BeO. Simulations of samples containing hundreds of thousands cellular automata may generate problem in obtaining a high accuracy therefore different numerical methods of solving equations of motion are investigated.

The paper presents the application of cellular automata (CA) method for simulations of fibers breaking process in composites. Cellular automata (CA) method is described in the first part of this paper. The next part includes the description of CA method used for fibre breaking process in composites and few examples of application. The last part presents possibility of simultaneous usage, acoustic emission and CA simulations.

The paper presents the application of the Movable Cellular Automata (MCA) method for a simulation of 2D crack propagation in ceramic materials. The MCA method let us to simulate a movement of formation and cracks course for impossible to observe during an experiment. Ceramic sample was chosen to the research as an elastic-brittle material. During the study the simulation was done and the experiment was carried out with the same guidelines. The MCA model was correlated with experimental data. The simulation program generates data which allow to compute quantities such as an ultimate compressive strength and to show in the graphic form the moment of cracks initiation. Comparison of experimental and simulated results proves that Movable Cellular Automata method is suitable for modeling crack propagation in ceramic materials in two-dimensional system.