Q2: Figure (2) shows an isometric view of a crankshaft that is actuated by the vertical force acting at the end of the crank (267N). The diameter of the crankshaft is (10 mm). Figure (2) 254 mm 102 mm Find: 152 mm 1. Principal stresses at points B & C. 2. Select a suitable material for the crankshaft at the Rc worse condition. 76 mm 267 N -127 mm- RA

Design

what stress state has the most impact onthe design at point B?

Q3 The figure shows a round shaft from a gear transmission. Gears are mounted at points A, C, and E. Supporting bearings are at B and D The forces transmitted from the gears to the shaft are shown, all acting downward. Compute the maximum stress due to bending in the shaft, accounting for stress concentrations. calculate the safety factor for the material selected. if matrial 4150 Anneald ,if F1=9kn,F2=13kn,F3=15kn

3-10 A rigid bar rests on aluminum-alloy and steel uprights, as shown in the figure.( a) Determine the inclination of the horizontal bar after a raise in temperature of 100°C. Assume the coefficients of thermal expansion for aluminum alloy and Steel to be, respectively, 23.2 X 106/°C and 11.7x 10°/°C. To a greatly exaggerated scale, sketch the position of the bar after the raise in temperature. (b) What stresses would develop in the upright members if their tops were prevented from expanding? Let the elastic moduli for aluminum alloy and steel be, respectively, 75 GPA and 200GPa. Compare the obtained stresses with those given in Table 1 of Appendix. (Hint: The tendency for thermal expansion is counteracted by elastic contraction.)

Q2) A plate clutch has 3 discs on the driving shaft and 2 discs on the driven shaft providing 4 pairs of contact surfaces (8 contact surfaces) each of 240 mm external diameter and 120 mm internal diameter. Assuming uniform pressure (P=constant). See figure (Q2) below. a) Find the total springs load pressing the plates to transmit 25 KW at 1575 rpm, taking μ=0.3 b) If there are 6 springs each of stiffness 13 KN/m and each of contact surface has worn away by 1.25 mm. What is the maximum power that can be transmitted if the same speed and µ? discs (driving) driving shaft (rpm) H discs (driven) direction of axial movement driven shaft

Q2: Consider the steel spring in the illustration. (a) Find the pitch, solid height, and number of active turns. (b) Find the spring rate. Assume the material is A228 music wire. (e) Find the force F, required to close the spring solid. (d) Find the shear stress in the spring due to the force F, 120 mm M W 3.4 mm 50 mm

Determine the nodal displacements the forces in each element and the reactions.Use the direct stiffness method for these problems I Figure P3-4 E. A E, A 3. 20,000 lb E, = 30 x 10 psi E, = 15 x 10° psi A 5 in 30 in. 30 in.

why is the external load not shown in the free body diagram of limk 2 and 4?

0:07I | ZVAO K/s a 15all KOREK A locs.google.com 11 Q2: The extension spring shown in the figure has full-twisted loop ends. The material is AISI 1040Q&T 400FO wire. The spring has 82 coils and is close- wound with a preload of 18 Ibf. (a) Find the closed length of the spring.(b) Find the torsional stress in the spring corresponding to the preload.(c) Estimate the spring rate.(d) What load would cause permanent deformation?(e) What is the spring deflection corresponding to the load found ?in part d 0.162 in 1 in L-in R -in R. Option 1 O