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
Related Articles
- EP ID EP660326
- DOI 10.30929/1995-0519.2018.4.87-93
- Views 65
- Downloads 0
THE UP-TO-DATE STATE AND THE PROSPECTS OF THE DEVELOPMENT OF UKRAINIAN FIELD OF HIGHER EDUCATION
Purpose. To elucidate the general and important theoretical substantiation, which form the basis of the paradigm of the development of western universities, and to define the conceptual and methodological approach to the...
ABOUT SOME APPROACHES TO CONSTRUCTION OF UNDERGROUND PROCESSES COMPUTER MODELLING SOFTWARE COMPLEXES
Purpose. To discuss the main problems of underground processes mathematical modeling software construction systems on the example of a number of well-known programs. There are different ways to construct software that...
MODEL FOR CREATION OF THE ENTERPRISE ECONOMIC SECURITY SYSTEM: ECONOMIC COST EFFECTIVENESS IN A SHORT-TERM PERIOD
Purpose. To construct a graphical analog model of the relationship between the results and costs associated with the formation of economic security over the short-term period in order to determine the economic efficiency...
INITIATION LOCAL ACCUMULATIONS OF METHANE SHOCK WAVE IN THE AIR ACCIDENTAL EXPLOSIONS IN MINES
Purpose. Improving the safety of emergency work in mines with the risk of explosions and mine atmosphere by tak- ing into account the initiation site impact of explosion and combustion regime in the safe distances calcul...
APPLICATION OF MATHEMATICAL MODELING TO DISTANCE AND INDIVIDUAL EDUCATION
Purpose. To demonstrate the ways of improving distance learning on mathematics by extending application focus on its fundamental concepts. It is directed to promote the best assimilation of these mathematical abstraction...