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Information × Registration Number 0211U001372, 0108U000634 , R & D reports Title Forecasting of residual working-capacity of the deformed systems with defects on the basis of the intellectual analysis of parameters of their deformation. popup.stage_title Head Obodan Nataly Illivna, Registration Date 01-02-2011 Organization Dniepropetrovsk national university popup.description2 The object of the given research is to analyze forecasting process for residual strength of damaged deformable systems; the subject of the research is a parameterized model of damages. The research goal is to identify the model with employment of indirect measurements of deformation parameters and artificial intelligence techniques; after that residual strength is determined through fracture criterion. The research is based on the fracture model like Cherepanov - Rice one, finite element model of mechanics of damaged deformable solid body, and an inverse neural network model to solve inverse problem of solid deformable body mechanics that is to determine damage characteristics as a function of known stress-strain state data. Hypotheses about possible damages of the system are formulated on the basis of the observed quantities of the system under operation conditions. For the first time the formal forecasting model of residual strength of the deformed system is proposed: the model based on the observation of a system under operation conditions; it includes the analysis of attributes characterizing current deformed state, formation of hypotheses about possible deviations of system characteristics, determination of the model which adequately characterize its current state, and consequently estimation of residual bearing capacity of the system. For the first time approach to construct model adequate to observable quantities is developed. The approach uses the semantic space reflecting semantics of the problem. The space is metrisized, the metric reflects a proximity in the space during specified time period. For the first time integral fracture criterion is analyzed for the case of quasi-static damage growth. Practical value of the research stems from theoretical foundations of residual strength estimation developed in the framework of the research. The theoretical foundations could be used to make decisions about subsequent operation of damaged systems. Obtained results could be employed to estimate operational readiness of aerostructures and anti-missile defense systems as well. A problem of residual operability is of great importance in the engineering industry and building industry. The damage estimation according to the abovementioned fracture criterion leads to resource-saving in these industries due to enlargement of the time periods between general overhauls. Proposed techniques could be used in space (Yuzhnoe Design Office), aviation (Progress Design Office Motor-Sich Ltd.), and engineering (Malyshev Plant Ltd.) industries. The damage identification technique and non-destructive evaluation techniques could be used in any monitoring system and for deterministic estimations of operability of engineering systems. Product Description popup.authors Адлуцький В. Я. Гавеля Г.М. Громов В.О. Гук Н.А. Кисельов Е.М. Королевич М.В. Пацюк А.Г. Полишко О.М. Шаповал І.П. Шерстюк Г.Г. popup.nrat_date 2020-04-02 Close