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Information × Registration Number 0212U005182, 0110U006278 , R & D reports Title Development of the mathematical methods of calculation of residual stresses, microstructural state and endurance of surfaced members and elements of structures and mechanisms with accounting of its wear popup.stage_title Head Senchenkov Igor Konstantinovich, Registration Date 15-08-2012 Organization S.P.Timoshenko Institute of Mechanics popup.description2 The objects of investigation are residual thermomechanical and microstructural states of roll steel parts under multilayered lateral surfacing and following combined thermomechanical cyclic loading. An aim of the work is to develop the methods of calculation of stresses and microstructure of cylindrical parts under multilayered lateral surfacing and following operational thermomechanical loading, which is localized on angular coordinate. Theoretical investigations were carried out on the base of mechanics of growing nonhomogeneous viscoplastic bodies. Iterative and time step methods as well as finite element method were used for numerical modelling. The solution methods for axe symmetric and plain deformation of cylindrical parts with accounting of residual stresses are developed. Mathematical modelling of thermomechanical processes under surfacing of roll from 50ХФА steel by two layers 08кп and 25Х5ФМС steels and its following operational loading in high temperature cycles and cycles of pressure was carried out. It was found that the regime of cyclic plasticity in the roll under thermomechanical loading of hot surfacing doesn't appear. For higher values cyclic plasticity and low-cycle fatigue failure are possible. To prevent low-cycle fatigue failure one must choose material of intermediate layer with greater cyclic yield stress, e.g. 12ХНФ steel. The results obtained can be used to select surfacing technologies and materials of layers to raise roll's resource. Product Description popup.authors Баняс М.В. Жук Я.О. Карнаухов В.Г. Козлов В.И. Левон Л.Г. Оксенчук Н.Д Червінко О.П. Шевченко А.Ю. popup.nrat_date 2020-04-02 Close