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....
View
Full Document
 Spring '09
 Kim
 Force, Shear Stress, Second moment of area, rectangular thinwalled section

Click to edit the document details