| Abstract: | It has been pointed out that the problem of determining the long-term strength under complex conditions of loading consists in the simultaneous choice of an equivalent stress  e and the nature of the dependency of the failure time t* on the value of e. This is best described by a series of experimental data taken at constant temperature. The problem can be solved by introducing a parameter D which characterizes the total discrepancy between the experimental and theoretical values of t*, and through the use of a technique for determining the material constants which will lead to a minimum value of D. As an example of this approach, a quantitative treatment of the experimental data given by I.I. Trunin and A. A. Lebedev is presented.Moscow State University Institute of Mechanics. Translated from Problemy Prochnosti, No. 9, pp. 3–6, September, 1989. |
