Methods of describing the deformation and strength properties of highly filled polymer systems

Estimation of the long-term strength of polymer materials under arbitrary loading histories

“…A. II'yushin [1]. Some studies in this feld (see, for example, [2][3][4]) are mainly dedicated to the application of the general II'yushin's criterion in estimating the durability of some particular materials under different modes of loading and in selecting the respective effective functions (kernels) and nonlinear stress functions, as well as in formulating the limiting conditions of failure under combined stress states using different strength theories. The results of these studies provide a necessary basis for reliable estimation of the durability of polymer materials under constant loads and, in general, under all loads whose intensity varies only slightly with time.…”