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1321_Mechanics Homework Mechanics of Materials Solution

1321_Mechanics Homework Mechanics of Materials Solution -...

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Unformatted text preview: PROBLEM 11.18 11.18 The rodABC: i's made ofa steel fiaewhich tlie yield strength is a,= 65 ks_i and the modulus of elasticity is E= 29 x 106 133:. Knomngthat a strain energy of 90 in - lb mustbeacquiredbyflierodasthe axial loedl’ is applied, determinethefhctorofsafety ofthc rod with respect to permanent defamation whena =18 in. Kfi\ i JG 11.18 Solve Prob. 11.17, assumingthat a = 30 in. — -in. diameter SOLUTION —21-~in. diameter :e = (esooo)(o.ms:)= 12763 is. g:27¢3)’Cqs—3o\ 1274307303 = 54?“ . . (2mm: 10‘ )(mmg ) + (23(2? w :o‘ 330. H655) 5 '" ’fl’ 6. 04 and 11.19 Show by integration that the strain energy ofthe tapered rodAB is PROBLEM 11.19 1 PZL U=ZEAm where AM is the cross-sedimal area at end B. l__] SOLUTION 1 '4'“; E T l_J 1' I I AM A LWJ ...
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