Question: Determine the maximum permissible length Lmax for a steel pipe column that is fixed at the base and free at the top and must support

Determine the maximum permissible length Lmax for a steel pipe column that is fixed at the base and free at the top and must support an axial load P = 500 kN (see figure). The column has outside diameter d = 200 mm, wall thickness t = 10 mm, E = 200 GPa, and (Y = 250 MPa.

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