Exercise 1 Torsional stiffness of a socket – Using Free mesh vs. Mapped Mesh – Appling torque distributed on nodes – Torsional stiffness: moment / (radian or degree) Material: Steel The cylinder: Radius = 0.6m, Length = 1.5m The hex hole: Radius of circumscribed circle = 0.5m, Depth = 1m The square hole: 0.5m each sides Note: Please check the stress distribution carefully (to check what happened in this case)

Exercise 1 – Meshing Techniques 3D mesh – Free mesh – Mapping mesh

Exercise 2 – 3D Solid modeling Paddle crank of the bicycle – Please transform the unit into SI Unit: inch (1 in. = m)

Exercise 2 – 3D Solid modeling Material – Young’s modulus = 200 GPa – Poisson’s ratio = 0.3 Constraints: Exterior surface of the hole Loading: 200N downward force Results: 1.Deformed shape 2.Von Mises stress distribution of the crank 3.See what happened if the dimension of the central hole changes (elongate or shorten the hole length)

Exercise 3 – 2D plane stress Plane stress problem – Thickness = 5mm – Tension force = 100N, E=200GPa, ν= 0.3 – Increasing the diameter of the hole from 5mm to 25mm with 5mm interval Results: 1.The spot of high stress happened 2.Maximum von Mises stress value 3.See what happened if the dimension of the central hole changes (elongate or shorten the hole length)