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week 4-3

week 4-3 - Assignment Assignment#4 Forsubmission 6.92 6.109...

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ssignment 4 Assignment #4 For submission .92 .109 .58 6.92 6.109 5.58 For practice 6.93 5.44 5.61 Td Fb 0 12 Due Tuesday, February 10 th at 12 noon

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hin alled tubes Thin walled tubes An element of the wall (between A and B, depth dx , riable thickness will be in static equilibrium variable thickness t ) will be in static equilibrium according to the shear forces acting on each face.
ecall Shear Stress/Strain Recall Shear Stress/Strain

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ear flow Shear flow ear flow ( can be defined as the internal Shear flow ( q ) can be defined as the internal shearing force per unit length of the thin section. rce length force mm mm t q = = = 2 N τ
ear flow Shear flow 3 1 0 V V F x = = Recall expression for shear stress Rearranged for shear force A V = τ A V =

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ear flow Shear flow 3 1 V V = A V τ = () dx q dx t V A 1 1 1 = 3 1 q q = shear flow will be constant throughout ( ) dx q dx t V B 3 3 3 = the member
ear flow Shear flow rce length force mm mm t q = = = 2 N τ Since the shear flow is constant, the stress will be t h th thi k i th ll t largest where the thickness is the smallest

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week 4-3 - Assignment Assignment#4 Forsubmission 6.92 6.109...

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