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Category > Management Posted 21 Feb 2018 My Price 5.00

Dorn parameter

Stress rupture data are sometimes correlated with the Dorn parameter, θ = i exp[−Q/(RT)], where t is the rupture time, T is absolute temperature, and θ is assumed to depend only on stress. If this parameter correctly describes a set of data, then a plot of log(t) versus 1/T for data at a single level of stress would be a straight line. If the Larson-Miller parameter correctly correlates data, a plot of data at constant stress (therefore, constant PLM) of log(t) versus 1/T would also be a straight line.

 

A. If both parameters predict straight lines on log(t) versus 1/T plots, are they really the same thing?

B. If not, how do they differ? How could you tell from a plot of log(t) versus (1/T) which parameter better correlates a set of stress rupture data?

 

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Maurice Tutor
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Status NEW Posted 21 Feb 2018 10:02 PM My Price 5.00

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