12.07.2015 Views

Geometrijske karakteristike presjeka štapa

Geometrijske karakteristike presjeka štapa

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Zakrivljenost osi <strong>štapa</strong> vezana je nauzajamno zaokretanje poprečnih <strong>presjeka</strong>:1 dϕ=ρ dxdxd ϕ = → dϕ=ρM dxE I yMϕMKut zaokreta između krajnjih <strong>presjeka</strong><strong>štapa</strong> konstantne krutosti duljine l:lϕ = ∫M dxE I=ME0 y I ylMl+MNormalno naprezanje za slučaj djelovanja momenta savijanja oko osi z:σ x =MIzzyVedrana Kozulić Tehnička mehanika 2 36

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