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Information × Registration Number 0220U100870, 0118U001182 , R & D reports Title The development of the creep strains determination method of structural polymeric materials under the complex loading regimes. popup.stage_title Head Holub Vlаdyslаv P., Доктор технічних наук Registration Date 29-01-2020 Organization S.P.Timoshenko Institute of Mechanics popup.description2 The method of creep strains analysis of isotropic nonlinear viscoelastic materials has been developed. The method is based on a nonlinear three-dimensional creep theory of the hereditary type constitutive equations of which are given the form corresponding to the hypothesis of the strain and stress tensor deviators proportionality. The nonlinearity of viscoelastic properties under one-dimensional and complex stress states is given by equations of the Robotnov equation type. Fractional-exponential functions are used as creep kernels. The parameters of kernels are determined based on relations that establish the dependence between creep kernels under complex and one-dimensional stress state conditions. The discrete values of kernels in the singularity fields are taken into account using weighting functions. The problem of longitudinal, transverse and shear creep strains calculation of thin-walled tubular elements under combined loading tension with torsion has been solved and experimentally tested. Product Description popup.authors Hlemeida Serhii K. Golub Vladislav P. Danylchenko Svitlana B. Kaminska Olena A. Kasperska Valentyna V. Kobzar Yuriy M. Maslov Boris P. Nechyporenko Olena S. Pavluyk Yaroslav Viktorovych Pelykh Volodymyr M. Plashchynska Alla V. Pogrebnyak Anatoliy D. Reznik Vera S. Romanov Alexander V. Fernati Pavlo V. popup.nrat_date 2020-04-02 Close