Composite Area Moments · Statics and Dynamics

Statics and Dynamics Quiz

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A composite section consists of two identical rectangles, each

b \times h

, arranged in two configurations. Configuration 1: The rectangles are stacked vertically (one on top of the other), forming a single

b \times 2h

section. Configuration 2: The rectangles are placed side by side horizontally, forming a

2b \times h

section. Both configurations are loaded in vertical bending (bending about the horizontal centroidal axis).

What is the ratio

I_{\text{Config1}} / I_{\text{Config2}}

of the second moment of area about the horizontal centroidal axis for the two configurations?

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