Question:
The composite beam is composed of two steel plates {eq}(E_{s}=200 GPa) {/eq} and a wood core {eq}(E_{w}=11GPa) {/eq} ,which are prefectly bonded , as shown in figure.Given the allowable bending stress for the steel {eq}(sigma _{all})s=120 MPa {/eq},and for the wood {eq}(sigma _{all})s=24 MPa {/eq} .
(a) Determine the maximum moment M that can be applied to the beam (about the x-axis).
(b) Determine the maximum moment M that can be applied to the beam if the moment is applied about the y-axis instead of the x-axis.
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