Mechanical behaviour of materials during and after cutting process is depended on various factors. Surface topography is set of factors including mechanical and geometrical properties. From the surface topography, it is possible to resolve the transition from ideally elastic to quasi-elastic and plastic stress-strain states, particularly by finding a neutral plane of cut, where the compressive and tensile components are still in equilibrium. The paper solves the problem of the nonexistence of a new method for calculation of dynamics of stress-deformation states of deformation tool-material systems including the construction of stress-strain diagrams. The presented solution focuses on explaining the mechanical behavior of materials after cutting by abrasive waterjet technology (AWJ) which is a flexible tool accurately responding to the mechanical resistance of the material according to the accurately determined shape and roughness of machined surfaces. Theoretical results were compared by a certified laboratory VUHZ.
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