1. The problem statement, all variables and given/known data Shaft AB is fixed at point A and is subjected to a torque T = 2.5 kN·m applied at point B and an axial force P = 30 kN applied at point C. The actual shaft specifications (type of material, prismatic / changing cross sections are left up to us and is NOT the point of my question) 2. Relevant equations [tex]\delta[/tex] = PL/AE P = force, L = length, A = cross-sectional area, E = elastic modulus [tex]\phi[/tex] = TL/GIp T = torque, L = length, G = shear modulus, Ip = polar moment of inertia 3. The attempt at a solution I am basically treating this as 1 deformation problem and 1 torsion problem For the deformation / axial part: After cutting the sections, I find that RA = P and RB = P also And thus, [tex]\delta[/tex]total = [tex]\delta[/tex]1 + [tex]\delta[/tex]2 Where [tex]\delta[/tex]1 = PLAB/AABEAB And [tex]\delta[/tex]2 = PLBC/ABCEBC For the torsion part: Here is where I am very unsure of what to do. I know there will be a reaction torque at A, but will point C have one also? Right now I've got this - To + TC + TA = 0 => To = TA - TC And [tex]\phi[/tex]1 = [tex]\phi[/tex]2 Such that [tex]\phi[/tex]1 = TABLAB/GABIP,AB And [tex]\phi[/tex]1 = (TAB-To)LBC/GBCIP,BC Am I on the right track? Where is my analysis flawed ?