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Information × Registration Number 0200U003959, 0197U018138 , R & D reports Title Development of acoustic methods for estimation of fracture parameters and defection of materials and structure elements popup.stage_title Head Lysak Mykola Vasyl'ovych, Registration Date 20-12-2000 Organization Karpenko Physico-Mechanical Institute of the National Academy of Science of Ukraine popup.description2 A calculation model for subcritical growth of spatial crack at local areas of its front as a source of acoustic emission (AE) signals is developed. The new dependences between crack increment and its orientation from the one hand and amplitudes of AE signals and their cumulative count from another hand are established. The original technique for a AE estimation of hydrogen degradation of structure materials is developed as a result of action of hydrogen environment of high pressure and temperatures. The new mathematical models of multiparameter stochastic AE signals are elaborated. The measuring system for selection and processing of the information submitted by AE signals is constructed. The methods and means of metrology maintenance are developed Product Description popup.authors popup.nrat_date 2020-04-03 Close