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1.1 Material All material is structural steel S235JR: E = 2.1 . 109 MPa and V = 0,3 1.2 Analytic verification For the individual problems, an analytic verification of the structure must be made this means that in one or several points the Finite element analysis calculated stress, strain or displacement must be compared to an analytical calculation for instance using o = or similarl In some of the exercises this is specified to a further degree 1.3 Loads The students must find a suitable load for the structure chosen This means that large scale yielding as well as large displacements and rotations are not allowed. If local hot spots appear, they should be explained and quantified.
2 Exercises Most of the exercises below are accompanied by a corresponding 3D CAD model, which can be opened and modified (if needed) for further use. 2.1 Exercise 1 - U bar The U-bar is used as an alternative spring element in a machine. The force is applied perpendicular to the long arms in the two holes. a U For this specific exercise the following must be part of the report, but not restricted to: 1. Simplification of the geometry 2. Make a graph of the normal stress through the entire height of the structure in the bottom mid- point as shown with the line below (finding out how to create a Path in Workbench may help); C 3. Compare the results from sub question 2, with analytical results from curved beam theory 4. Perform a mesh convergence study for at least 3 different element types and compare them in one graph