Goodman fatigue equation

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 world wide, 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

External links

* http://www.mech.uwa.edu.au/DANotes/springs/fatigue/fatigue.html
* http://www.iwcfdrillengineer.com


Wikimedia Foundation. 2010.

Игры ⚽ Поможем решить контрольную работу

Look at other dictionaries:

  • Goodman relation — In materials science and fracture mechanics, the Goodman relation is an equation used to quantify the effect of mean stress on the fatigue life of a material.Mathematical descriptionThe Goodman relation can be represented mathematically as::sigma …   Wikipedia

  • literature — /lit euhr euh cheuhr, choor , li treuh /, n. 1. writings in which expression and form, in connection with ideas of permanent and universal interest, are characteristic or essential features, as poetry, novels, history, biography, and essays. 2.… …   Universalium

  • Mercury (element) — gold ← mercury → thallium Cd ↑ Hg ↓ Cn …   Wikipedia

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”