Тpin B i MPа Ob = i MPа
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- Repeat Problem 11.2-3 assuming that R= 10 kN · m/rad and L = 2 m., Solve the preceding problem using the numerical data: /) = 90mm, h = 280 mm, d = 210 mm, q = 14 kN/m, and L = L2 m.A cantilever aluminum column has a square tube cross section with an outer dimension of 150 mm. The column has a length L = 4 m and is designed to support an axial load of 45 kN. Find the minimum required thickness of the section if the factor of safety n = 2.5 with respect to buckling. Assume that the modulus of elasticity is 72 GPa and the proportional limit is 480 MPa.
- An elevated jogging track is supported at intervals by a wood beam AB (L = 7.5 ft) that is pinned at A and supported by steel rod BC and a steel washer at B. Both the rod (dBC= 3/16 in.) and the washer (dB= 1.0 in.) were designed using a rod tension force of TBC=415 lb. The rod was sized using a factor of safely of 3 against reaching the ultimate stress tru— 60 ksi. An allowable bearing stress sba= 565 psi was used to size the washer at B. A small platform HF is suspended below a section of the elevated track to support some mechanical and electrical equipment. The equipment load is uniform load q = 50 lb/ft and concentrated load WE= 175 lb at mid-span of beam HF. The plan is to drill a hole through beam ABaX £land install the same rod (dBC) and washer) dB) at both D and F to support beam HF. (a) Use s and to check the proposed design for rod DF and washer d,: are they acceptable? (b) Re-check the normal tensile stress in rod BC and bearing stress at 8 if either is inadequate under the additional load from platform HF. Re-design them to meet the original design criteria.A vertical pole consisting of a circular tube of outer diameter 5 in. and inner diameter 4.5 in. is loaded by a linearly varying distributed force with maximum intensity of q0, Find the maximum shear stress in the pole.The state of stress on an element along the hydraulic lift cylinder on a truck is trv= — 5 MPaLFind the maximum shear stress on the clement and show the state of stress on a sketch of a properly oriented clement.
- The bell-crank mechanism is in equilibrium for an applied load of F₁ = 13 kN applied at A. Assume a = 320mm, b = 130mm, c = 80mm, and = 45°. Pin B is in a double-shear connection and has a diameter of 31 mm. The bell crank has a thickness of 25 mm. Determine (a) the shear stress in pin B. (b) the bearing stress in the bell crank at B. Bell crank Support bracket Answers: Tpin B = i Ob = a B b MPa MPaThe bell-crank mechanism is in equilibrium for an applied load of F₁ = 18 kN applied at A. Assume a = 290mm, b = 170mm, c = 70mm, and 0 = 35°. Pin B is in a double-shear connection and has a diameter of 23 mm. The bell crank has a thickness of 37 mm. Determine (a) the shear stress in pin B. (b) the bearing stress in the bell crank at B. Support bracket Answers: Tpin 8 = i Bell crank i a B MPa MPa F₂The bell-crank mechanism is in equilibrium for an applied load of F₁ = 12 kN applied at A. Assume a = 250mm, b = 170mm, c = 80mm, and 0 = 50°. Pin B is in a double-shear connection and has a diameter of 20 mm. The bell crank has a thickness of 25 mm. Determine (a) the shear stress in pin B. (b) the bearing stress in the bell crank at B. Support bracket A Answers: Tpin B = i Ob= i Bell crank a B b MPa MPa
- * Your answer is incorrect. The bell-crank mechanism is in equilibrium for an applied load of F₁ = 11 kN applied at A. Assume a = 300mm, b = 120mm, c = 75mm, and 0 = 40°. Pin B is in a double-shear connection and has a diameter of 23 mm. The bell crank has a thickness of 22 mm. Determine (a) the shear stress in pin B. (b) the bearing stress in the bell crank at B. Bell crank Support bracket b F₁ Answers: Tpin B = Ob= 24.49 27.04 MPa MPaThe bell-crank mechanism is in equilibrium for an applied load of F₁ = 11 kN applied at A. Assume a = 320mm, b = 170mm, c = 85mm, and 0 = 40%. Pin B is in a double-shear connection and has a diameter of 29 mm. The bell crank has a thickness of 23 mm. Determine (a) the shear stress in pin B. (b) the bearing stress in the bell crank at B. Bell crank F₂ Support bracket b MPa Answers: Tpin B = i Ob= i a MPaThe bell-crank mechanism is in equilibrium for an applied load of F1 = 14 kN applied at A. Assume a = 290mm, b = 110mm, c = 70mm, and e = 40°. Pin B is in a double-shear connection and has a diameter of 25 mm. The bell crank has a thickness of 25 mm. Determine (a) the shear stress in pin B. (b) the bearing stress in the bell crank at B. Bell crank C F2 Support bracket - B A a F