# mechanics of materials

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A steel beam with a rectangular cross section is bent to form an arc of a circle of radius 6 m. Calculate the maximum stress in the beam given that the depth of the beam is 6 mm and the Young's modulusfor steel is 210 MPa

• mechanics of materials -

E=210 GPa (210 MPa isn’t correct)
t=6 mm=6•10⁻³m
R=6 m
Maximum bending stress is
σ(max) = E•t/2R=210•10⁹•6•10⁻³/2•6=105•10⁶ N/m²

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