3. Friction laws

Friction is defined in terms of contact speeds. The shear vector representing friction stresses is defined by : $\vec{τ} = τ \frac{Δ \vec{V}}{‖ \vec{V} ‖}$

with :

$Δ \vec{V}$: velocity difference between the two solids in contact

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References

(1) - FELDER (E.) - Le contact métal-outil en mise en forme des métaux. - Séminaire organisé à Sophia Antipolis (France), 22-26 mai 1989.
(2) - GEORGES (J.M.) - Frottement, usure et lubrification. - CNRS et Eyrolles Éd. (2000).
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