A. D. Pogrebnyak

Application of smoothing spline approximations in problems on identification of creep parameters

ConclusionIt is desirable to use approximated cubic splines to obtain reliable processing of experimental data on creep and for identification of creep parameters. The spline approximation makes it possible to allow for such characteristic features of creep as the three-stage nature of the process of deformation and the scattering of Theological properties of materials; it also makes it possible to computer the first and second derivatives for an arbitrary point in time to obtain the corresponding speed and acceleration of the creep process.

Strength, longevity, and failure of structural materials under multicycle loading (review)

ConclusionThis review provides a brief historical outline of the development of research on fatigue strength. Basic attention is focused on studies of the strength, longevity, and failure of metallic materials and structural components under cyclic loads, which have been conducted at the S. P. Timoshenko Mechanics Institute, National Academy of Sciences of Ukraine during the years of its existence. Developments of related organizations are touched upon briefly only to that degree in which they are associated with the problems under consideration.