Multiparametric prediction of the creep of polymer materials

Abstract

The article discusses phenomenological methods for predicting long-term creep, using stress-, temperature-, and vibro-time analogies. Starting from several previously introduced hypotheses, the article proposes a generalized nonlinear thermo-vibro-rheological relationship in which the complex stress-, temperature-, and vibro-time dependences are reduced separately to a time dependence (with certain basic reference values of$\sigma _{i_0 }$, T₀, and$\dot \sigma _{kla^0 }$, chosen arbitrarily), and to$(\sigma _i , {\rm T}, \dot \sigma _{kla} )^{ - t}$ dependences; the latter appears only in the change of the time factorsa _σ(σ_i),a _T(T), and$a_v (\dot \sigma _{kla} )$. The prediction methods have been verified experimentally.