1. The problem statement, all variables and given/known data A graded steel cylinder AISI 1030 is connected to a wall and loaded with axial forces. http://img542.imageshack.us/img542/3959/fbd1.jpg [Broken] Given: F = 30 [kN] d1 = 35mm d2 = 20mm Elastic Model: E = 2x105 MPa Safely coeffecient: 2 Yield strength limit: 440 MPa Required: 1) Describe the course of the internal forces along the beam and the course of the efforts. 2) Check beam for strength 3) Calculate the total distortion of the beam 2. Relevant equations Presumably http://img831.imageshack.us/img831/533/neededformulas.jpg [Broken] 3. The attempt at a solution Since I don't see a 3D drawing or references should I treat this problem like a 2D problem? 1) I presume they're asking for a free body diagram here: http://img694.imageshack.us/img694/9629/freebodydiag.jpg [Broken] 2) If I treat it like 2D: Before I can use the formula: Sigma = F/A I need to find A. So, A = 1 x 0.020 + 2 x 0.035 = 0.09m2 sigma = F/A sigma = 30+30(2.5)/0.09 sigma = 1166 N/mm2 3) http://img511.imageshack.us/img511/3645/deltal.jpg [Broken] Is that correct?