Beams AB, BC, and CD have the cross section shown and are pin-connected at B and C. Knowing that the allowable normal stress is +210 MPa in tension and -250 MPa in compression, determine: (a) the largest permissible value of w if beam BC is not to be overstressed, and (b) the corresponding maximum distance a, for which the cantilever beams AB and CD are not overstressed.
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Since the cross section of each beam is the same, the maximum allowable stress in each beam is the same. Therefore, the maximum allowable stress is: σ_max = 210 MPa (in tension) σ_max = -250 MPa (in compression) Show more…
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