Creep rate

The characterized creep strain rate typically refers to the constant rate in this secondary stage. Stress dependence of this rate depends on the creep mechanism. In tertiary creep , the strain rate exponentially increases with stress because of necking phenomena or internal cracks or voids decreases the effective area of the . Secondary Creep: has a relatively uniform rate. Tertiary Creep: has an accelerated creep rate and terminates when the material breaks or ruptures.

Time rate of deformation of a material subject to stress at a constant temperature. Minimum creep rate is the slope of the portion of the creep vs. It is the slope of the creep vs. This can be rearranged into the forThe activation energy Q can be determined experimentally, by plotting the natural log of creep rate against the reciprocal of temperature.

Effects of stress and temperature on creep rate. The creeping coil experiment - variable stresses in a single specimen. Evaluating the stress exponent. Simulation of creeping coil.

Englisch-Deutsch-Übersetzung für creep rate im Online-Wörterbuch dict. Initially, primary or transient creep occurs in Stage I. The creep rate , (the slope of the curve) is high at first, but it soon decreases. This is followed by secondary (or steady-state) creep in Stage II, when the creep rate is small and the strain increases very slowly with time.

Eventually, in Stage III (tertiary or accelerating creep), . Примеры перевода, содержащие „ creep rate “ – Русско-английский словарь и система поиска по миллионам русских переводов. Creep is a performance-based behaviour since it is not an intrinsic materials response. Furthermore, creepis highly dependent on environment including temperature and ambient conditions. Tertiary creep yields a rapid creep rate till failure. Primary creep provides decreasing creep rate.

The constant creep rate in the second step represent the creep rate of the material. Notes: B curve is obtained when the stress rather than the . Lingvo Live — онлайн-словарь от ABBYY. Переводчик для английского, русского, немецкого, французского, испанского, итальянского и украинского языков. Примеры, словосочетания, формы слова, тематические словари.

Creep deformation behaviour Figures 6(a) and 6(b) show the relationship between the minimum ereep rate and time to tertiary creep and the relationship between the duration of tertiary creep and minimum creep rate , respectively. Cr-IMo steel, 12Cr-lMo-l W-0. A study was made of cold-drawn aluminum at 105° F, to determine the effects of varia- tions of creep rate on the mechanism of deformation.

Strain-hardening was found to de- crease monotonically with increase in strain during first stage of creep. The extension on loading and the extension at the beginning of the third stage . A study was made of the effects of variations in both strain rate and temperature on the creep characteristics in tension of cold-drawn ingot iron. The third stage of creep began without necking or without the presence of cracks of microscopic dimensions, but consider- able necking occurred in all specimens tested to fracture.