A semicircular bar of square cross section and inner radius a is subjected to the loads
Q = 1 kN as shown. Assume that $u_r = 0$ at the highest point of the bar. The inner
radius, outer radius Poisson's ratio and shear modulus of the bar are given as: a, 1.1a,
1/3 and $\mu$, respectively.
Calculate the displacement component, $u_r$ and the stress components, $\sigma_{rr}$ and $\sigma_{\theta\theta}$ at the
point $(a, 0)$ in terms of a and $\mu$.
