Equation icon  Miner's rule

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Resource type: Equation
Description: Miner's rule is used to estimate fatigue life left of a sample which has undergone cyclic stresses at varying amplitudes. Typically used in high-cycle applications.$${\sum_{i=1}^{k}{n_i\over{N_i}} = C}$$

$k$ = Number of different stress magnitudes in a spectrum
$n_i$ = Number of cycles
$N_i$ = Number of cycles to failure
$C$ = Experimental constant between 0.7 and 2.2, usually for design purposes, $C$ is assumed to be 1

TeX format: {\sum_{i=1}^{k}{n_i\over{N_i}} = C}

Keywords: Miner • fatigue • cyclic stress • cycles
Categories: Science approaches
Science approaches > Deformation & failure > Fatigue
Properties > Mechanical & thermal > Fatigue strength
Created by: The University of Liverpool
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Date created: 02 July 2010
Date added: 04 August 2010
Resource ID: 3180