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Unformatted text preview: 2. The dimensions of a steel (300M) Ibeam are b = 50mm , t = 5mm , and h = 200mm . Assume that t and h are to be fixed for an aluminum (7075T6) Ibeam. Find the width b for the aluminum beam so that its bending stiffness EI is equal to that of the steel beam. Compare the weightsperunit length of these two beams. Which is more efficient weightwise? The densities of steel and aluminum are 7.8 and 2.78g/cm 3 , respectively. 3. Compare the loadcarrying capabilities of two beams having the respective crosssections shown in the figure. Use bending stiffness as the criterion for comparison. It is given that a = 4cm , t = 0.2 cm , and the two crosssections have the same area....
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This note was uploaded on 06/06/2011 for the course EAS 4200C taught by Professor Kim during the Spring '09 term at University of Florida.
 Spring '09
 Kim

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