106_Problem CHAPTER 9

106_Problem CHAPTER 9 - PROBLEM 9.90 For the angle cross...

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PROBLEM 9.90 For the angle cross section indicated, determine the orientation of the principal axes at the origin and the corresponding values of the moments of inertia. The 1 L5 3 -in. 2 ×× angle cross section of Problem 9.78 SOLUTION From Problems 9.78 and 9.84 4 2.81 in xy I = 4 9.45 in x I = 4 2.58 in y I = Then () 4 1 6.015 in 2 xy II += 4 1 3.435 in 2 −= Equation (9.25): ( ) 2 22 .8 1 tan 2 0.8180 9.45 2.58 xy m I θ =− −− Then 2 39.2849 and 140.7151
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This note was uploaded on 07/11/2011 for the course EGM 2511 taught by Professor Jenkins during the Spring '08 term at University of Florida.

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