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Goodman fatigue equation
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Goodman fatigue equation : ウィキペディア英語版
Goodman fatigue equation

The Goodman fatigue equation is used by engineers for fatigue analysis. The equation is used to make correlations of experimental fatigue data of metals and other materials.
The equation is also used to determine the failure mechanisms of sucker rods in pumping oil wells worldwide, and to help design new sucker rod strings for rod-pumped oil wells.
== Sources ==
From similar triangles the Goodman fatigue equation is :
( 4a) τm /Sus + τa /Ses = 1/n in which the stress components are given by
τm = Ks 8 FmC / πd2 where Fm = ( Fhi + Flo ) /2 and
τa = Kh 8 Fa C / πd2 where Fa = ( Fhi - Flo ) /2

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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