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Homework Statement
A mild steel beam has a solid square cross section of 100mm and is simply supported by two supports 3m apart. calculate the dead load that can be safely supported when applied to the middle of the beam?
Homework Equations
The Attempt at a Solution
given data:
square cross section of 100m
Ultimate strength in bending is σb = 450N/mm2
Ultimate shear in strength = Tut 320 N/mm2
The maximum bending moment is under the load
So from the bending formula
Bending stress (σb) = P / A
A = Area of cross section
Dead load P = σbA / 4
= 450 x 1002 / 4
= 1125000N (1125KN)
Can anyone confirm that this is the correct answer.
Thanks in advance