Equation icon  Steady-state creep equation

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Resource type: Equation
Description: Creep is the time-dependent deformation when subjected to a constant load beneath the yield strength. This is the equation for steady state creep (aka secondary creep).

TeX format: \dot{\varepsilon} = A\sigma^ne^{(\frac{-Q}{RT})}

dε/dt {\dot{\varepsilon}} = Creep/strain rate (s-1) {s^{-1}}
A {A} = Constant
σ {\sigma} = Constant applied stress (Pa) {Pa}
n {n} = Stress exponent
Q {Q} = Activation energy (J) {J}
T {T} = Temperature (K) {K}
R {R} = Gas constant (J.kg-1K-1) {J.kg^{-1}K{-1}}

Keywords: creep • failure • life cycle • life • time • rupture • temperature
Categories: Science approaches
Science approaches > Deformation & failure > Plastic deformation
Science approaches > Deformation & failure > Creep
Properties > Mechanical & thermal > Yield strength
Properties > Mechanical & thermal > Creep resistance
Properties > Chemical & biological > Environmental
Testing, analysis & experimentation > Mechanical testing
Other topics > Life cycle analysis
Other topics > Risk analysis
Created by: The University of Liverpool
License: This resource is released under the Creative Commons Attribution license (2.0 UK: England & Wales).
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Date created: 07 July 2010
Date added: 04 August 2010
Resource ID: 3172