METHOD OF DETERMINATION OF LONG-TERM STRENGTH OF MATERIALS Russian patent published in 2001 - IPC

FIELD: diagnosis of loaded materials; determination of long-term strength of structures at designing and operating stages. SUBSTANCE: proposed method consists in measurement of short-time strength and temperature of material under test followed by plotting temperature graph versus short-time strength σ_b(T).. Absolute temperature T^*, corresponding to point of intersection is determined by linear extrapolation till intersection with abscissa axis. Long-term strength σ_t(T) during period "t" (s) at absolute temperature T is calculated from the following relationship σ_t(T) = σ_b(T){1-lg(t)/13[(T^*/T)-1]}. EFFECT: reduced consumption of labor required for determination of long-term strength of material. 2 dwg