Creep life prediction by the basic models of deformation-destruction kinetics of wood-based composites / Sergiy Kulman ... [et al.]. -- Graf., tab. -- Lit. - Existing models of kinetics of deformation-destruction are related mainly to the description of the transition from the undamaged state of the material into a destroyed stage. The purpose of this study was to create the basic model of deformation-destruction kinetics describing this process in the form of several successive transitions of separate structural elements (SE), in a material that deforms from one rheological state to another one in time. A formal kinetics apparatus is involved to describe this process, which allows, knowing the speed of the transition of the SE from one rheological state to another one, to predict the time to reach the critical concentration of destroyed SE. It is established that the process of deformation- destruction can be considered a process of gradual transition of the SE, first an elastic state into viscoelastic and then destroyed. The change in the concentration of one or another SE can be determined experimentally by measuring the quantities that correlate with the parameters of deformation-destruction. For the first time, a two-stage nonlinear kinetic model of resource loss with the creep of composite materials based on wood was proposed. The application of the method of basic deformation diagrams in conjunction with the two- stage description of the process of accumulation of damage can increase the accuracy of the prediction of allowable time for different load patterns during creep.

In Acta Facultatis Xylologiae Zvolen : vedecký časopis Drevárskej fakulty. -- Zvolen : Technická univerzita vo Zvolene, 2021. -- ISSN 1336-3824. -- Vol. 63, no. 2 (2021), s. 39-53

I. Kulman, Sergiy
II. Boiko, Liudmyla
III. Bugaenko, Yaroslav
IV. Sedliačik, Ján, 1968-
V. Acta Facultatis Xylologiae Zvolen : vedecký časopis Drevárskej fakulty. -- Vol. 63, no. 2 (2021), s. 39-53

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