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Unformatted text preview: 2. The dimensions of a steel (300M) I-beam are b = 50mm , t = 5mm , and h = 200mm . Assume that t and h are to be fixed for an aluminum (7075-T6) I-beam. Find the width b for the aluminum beam so that its bending stiffness EI is equal to that of the steel beam. Compare the weights-per-unit length of these two beams. Which is more efficient weight-wise? The densities of steel and aluminum are 7.8 and 2.78g/cm 3 , respectively. 3. Compare the load-carrying capabilities of two beams having the respective cross-sections 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 cross-sections 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