Question

(7.21) An elastic circular bar is fixed at one end and attached to a rubber grommet at the other end The grommet functions as a torsional spring with spring constant k. If a concentrated torque of mag- nitude Ta is applied in the center of the bar, what is the rotation at the end of the bar, ?(L)? Assume a constant shear modulus G and polar inom ent of inertia J L/2 T,

Answer 1

shear modulus = G MOR HYA as at total rotation due to to the B is given by Tai . let actual deflection be or to - this will undine a force Torque of hoa in spring we can write a (OG- Oa) = wa [ ]

Оо, Авт “I 31 аз 9 То 241 8 9а . To L. 2- Т