Search academic texts

Information × Registration Number 0219U102338, 0117U000517 , R & D reports Title Modeling and diagnostic of the slow fracture of the materials due the local creep popup.stage_title Head Rudavskyy Denys V., Доктор технічних наук Registration Date 26-12-2019 Organization Karpenko Physico-Mechanical Institute of NASU popup.description2  Using the first law of thermodynamics, an energy approach was developed, and on this basis, calculation models and methods were built for determining the long-term strength and residual life of structural elements with creep cracks under long-term static and time-varying loadings and also under shunting that is very common for engineering practice. At the same time the periods of optimal load changes have been found for both cases when the maneuver mode of operation can be approximated by the stationary mode and when by low cycle fatigue. Using the proposed approach new calculation models have been formed to analytically describe the delayed fracture of the materials and structural elements in the parameters of acoustic emission signals that follow the fracture process. This allows a more accurate estimation of the residual life of the load-bearing structural elements, especially when loads are unknown. The obtained AE models were used to develop a method for constructing the kinetic diagrams of creep cracks propagation under long-term loading. Product Description popup.authors Andreykiv Oleksandr Ye. Velykyj Petro P. Dolinska Iryna Ya. Dolishnij Petro M. Dolichnij Petro M. Kaniuk Yurii Ihorovych Karpiv Bogdan V. Klym Bogdan Mel`nyk Nataliia P. Mokryj Oleg M. Okrepkyj Yurii S. Pochapskyi Yevhen P. Rudavskyy Denys V. Savytskyj V. Skal'skyy Valentyn R. Stankevych Olena M. Tolopko Jaroslav D. popup.nrat_date 2020-04-02 Close