Question

Revisit the torsion analysis done in class that compared a solid round, a rectangular and an elliptical cross section. The circle will be the baseline and all other shapes must have the same area as the circle. 0 0 FIGURE 4.28 Torsion of circular and rectangular members. 2a a 2 b FIGURE 4.29 Torsion of an elliptical shaft. Assume the shear stress for a circle has a value ?-18 ksi. For an aspect ratio of both the ellipse and rectangle of 8, calculate the shear stress ? for the: a.) ellipse b.) rectangle

Answer 1

4 ta | . D=0.3193D frea at elbKe : area at cincle D2 4 /6T8 オ T- 18万 Те 3.5342 (A) Shear strex 7ectangeo cl where k 3(+39s