Refer to Figure 3-20. For the shaft aligned with the x-axis, create a stress element on the bottom of the shaft just to the left of section B. Then draw the Mohr's circle for that element. Use D = 0.50 in. T= 300 lb in 7 = 100D + 18 from A to V (16) M (lb-in) 42 6 in R 10 is 6 i 42 lb 4 in- # 60 lb B -5 in 4 in M-160 lb)(3 in) 180 lb in 60 lb 180 Re 0 FIGURE 3-20 Bending moment on a shaft carrying a crank 3 +C Re 18 lb -18 Shaft can rotate freely in supports A and C. All resisiting torque acts to the left of A provided by an adjacent element. Free body diagram. in x-2 plane Shear diagram Moment diagram