Q: A hoop shrunk onto a hallow tube exert a contact pressure of 3 ksi on the tube. An internal pressure of 10 ksi is then applied to the tube. The inner and outer radii of the tube are 1.5 in and 2.5 in, and 2.5 in and 4 in for the hoop. What is the maximum tangential strss in the tube after application of internal pressure? Also plot tangential stress variation diagram across the section.