University of MN Aerospace structures questions

    April 23, 2024

1) Find the displacement function 𝑒𝑧 (𝑧) by solving the one dimensional equilibrium equation and applying boundary conditions. 𝜌, 𝑓 = π‘”πœŒπ΄ 𝑙 (π‘™π‘’π‘›π‘”π‘‘β„Ž) 𝐴, 𝑔 𝐸 z 2) The displacement field for a deformed elastic body is : 𝑒π‘₯ (π‘₯, 𝑦, 𝑧) = 𝑠𝑦 𝑒𝑦 (π‘₯, 𝑦, 𝑧) = 𝑠π‘₯ 𝑒𝑧 (π‘₯, 𝑦, 𝑧) = 0 a) Compute individualized components of the symmetrical strain tensor. i.e. compute 𝑒π‘₯π‘₯ (π‘₯, 𝑦, 𝑧), 𝑒π‘₯𝑦 (π‘₯, 𝑦, 𝑧), 𝑒π‘₯𝑧 (π‘₯, 𝑦, 𝑧), 𝑒π‘₯𝑦 (π‘₯, 𝑦, 𝑧), 𝑒𝑦𝑦 (π‘₯, 𝑦, 𝑧), 𝑒𝑦𝑧 (π‘₯, 𝑦, 𝑧), 𝑒π‘₯𝑧 (π‘₯, 𝑦, 𝑧), 𝑒𝑦𝑧 (π‘₯, 𝑦, 𝑧), 𝑒𝑧𝑧 (π‘₯, 𝑦, 𝑧) 𝑒π‘₯π‘₯ 𝑒 [𝑒π‘₯𝑦 𝑒π‘₯𝑧 𝑒π‘₯𝑦 𝑒𝑦𝑦 𝑒𝑦𝑧 𝑒π‘₯𝑧 𝑒𝑦𝑧 ] 𝑒𝑧𝑧 b) Compute the total change of the angles (i.e. the engineering shear stress). Give your answer in terms of s. (90 degree angles, rotated 45 degrees) y D A B C x

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