In this paper a new approach to modelling abrasive water jet (AWJ) cutting is presented. A cellular automata (CA) model was developed, which calculates the shape of the cutting front, which can be used as an estimation of the surface quality. The CA calculates the form of the cutting front by using the developed rules for material removal and propagation of AWJ. The model also generates a well-known step on the cutting front. The modelling with CA provides a visual narrative of the moving cutting front, which is impossible to observe in the cutting of opaque materials.
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