Vitesses de déformation - mms2
Vitesses de déformation - mms2
Vitesses de déformation - mms2
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Autour <strong>de</strong>s vitesses <strong>de</strong> déformation et <strong>de</strong> rotationL∼ = Ḟ ∼.F ∼ −1 = grad vtenseur gradient <strong>de</strong>s vitessesD ∼:= 1 2 (L ∼ + L ∼T ) tenseur taux <strong>de</strong> déformationW ∼:= 1 2 (L ∼ − L ∼T ) tenseur taux <strong>de</strong> rotationĖ∼ = 1 2 Ċ∼ = F T .D∼ ∼.F ∼•z}|{dx = ∼L.dx élément <strong>de</strong> fibre matérielle•z }| {dx 1 .dx 2 = 2dx 1 .D ∼.dx 2 = dX 1 .Ċ ∼.dX 2•z}|{dv = (trace L ∼) dv = ˙JJ dv˙λ(m )= m .D .mλ(m )élément <strong>de</strong> volumetaux d’allongement relatifBilan : vitesses <strong>de</strong> déformation du milieu continu 57/84