Which would be the principal stresses at point H (the one in green) which is alo

Question

Which would be the principal stresses at point H (the one in green) which is along the neutral axis?

8-54 The frame supports a centrally applied distributed load of 1.8 kip/ft. Determine the state of stress at points A and B on member CD and indicate the results on a volume element located at each of these points. The pins at C and D are at the same location as the neutral axis for the cross section 1.8 kip/ft 1.5 in. 6 in. 12 ft in SOLUTION Member CD: 16 ft FDE = 24.0 kip /306)s288skip Segment: 4 N--(24.0)=0; N= 192 kip = 0: +15F, = 0; G+M.-0; V +-(24.0)-19.8 = 0; V = 5.40 kip -M- 19.8(5.5) + (24.0)(11) = 0; M = 495 kip-ft A = 7(1.5) + 6(1) = 16.5 in- + 456)) 2.1136 in 16.5 (7)( 1.53) + 7(1.5)(2.1 136-0.75)2 + 12(1)(63) + 1(6)(45-2.1136)2 I = 73.662 in

Explanation / Answer

if H is the neutral axis then the stresses on H are zero since the definition of neutral axis is the axis where the stresses are zero.

also the princ

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