DETERMINATION OF RATIONAL CONDITIONS OF ABRASIVE WATERJET CUTTING OF THICK CARBON-CARBON PLATES BASED ON THE MODELING OF A TWO-PHASE FLOW OF LIQUID
Journal Title: Вісник Кременчуцького національного університету імені Михайла Остроградського - Year 2018, Vol 1, Issue 111
Abstract
Purpose. The features of samples processing from carbon-carbon composite materials by abrasive water jet cutting are shown. Possessing a set of unique physical and mechanical properties, the latter are increasingly applied in aviation and space technologies. It has been determined the conditions for the expansion of the destruction outside the jet impact zone as a two-phase flow of liquid and the detection of the conditions for the localization of the hydraulic action. Methodology. Engineering modeling by means of software tools FlowVision has been used to find out the diagram of the distribution of the hydrodynamic load of the elements of the processed composite in the jet impact zone. The comparative analysis method also has been used to find out cut quality. Results. The model of interaction of an abrasive water jet stream with an inhomogeneous environment of regular structure in which the reinforcement coincides with the axes of the jet is proposed. The calculated scheme of moving of two-phase flow of liquid in the carbon-based composite of the 3d structure at the initial moment and at the moment of stabilization is shown. The volume of reinforcing fiber that was destroyed by a two-phase flow of fluid per unit time has been determined. For experimental studies serial and special laboratory equipment of abrasive water jet processing has been used. Experimental studies have been carried out that prove the identity of the forecast (mathematical modeling of phenomena of destruction by abrasive water jet flow) and experimental cutting of carbon-carbon composite blanks. The results show a satisfactory convergence, the measurement error does not exceed 25%. Originality. For the first time the strain-stress state of the cutting zone in composite materials based on carbon fibers at abrasive water jet by means of engineering modeling has been determined. Practical value. The results have been actually implemented industrially, and are of interest for the further research aimed at the hybridization of processes, as well as the development of technologies based on a functional-oriented approach. References 10, table 1, figures 6.
Authors and Affiliations
E. Lashko
Keywords
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- DOI 10.30929/1995-0519.2018.4.87-93
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