A beam of cross section shown is extruded from an aluminum alloy for which σy = 310 MPa and σu = 480 MPa. Using a factor of safety 3, determine the largest couple which may be applied to the beam when it is bent about the z axis.© BrainMass Inc. brainmass.com October 9, 2019, 3:29 pm ad1c9bdddf
See the attached file.
Given: σy = 310 MPa, σu = 480 MPa, factor of safety = 3
Find: largest couple (M) which may be applied to the beam when it is bent about the z axis.
For this problem, we have a beam in pure bending where the neutral axis passes through the centroid of the cross section, so we can use the following formula:
The solution determines the largest couple which may be applied to the beam when it is bent.