PROBLEM 9.39 The centroidal polar moment of inertia CJof the 3215.5 10 mm×shaded region is 64250 10mm×. Determine the polar moments of inertia BJand DJof the shaded region knowing that 2DBJJ=and 100d=mm. SOLUTION Have 2BCCBJJAd=+and 2DCCDdNow 2=Then ( )222DBJAdd+=+Now ()2222and2CBCDdaddad=+Substituting ( )( )42CAadJA+=++or 12CJA221 25010 mm100 mm13064.5 mm215.510 mm×=×or 114.300 mma=Then ( )()25010 mm15.510 mm114.300 mm100 mmBJ
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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.