Issue link: https://resources.rand3d.com/i/1470826
CATIA V5-6R2018: Generative Structural Analysis 1–10 © 2020, ASCENT - Center for Technical Knowledge® 1.6 CAD Model Preparation A CAD model is developed to provide detailed information for manufacturing. All of the required information related to fillets, rounds, holes, and threads must be included. Processing steps and surface finishes are indicated, and dimensions are fully specified. An FEA model is developed to determine model behavior under a specific set of loading and boundary conditions. To analyze a model effectively, an FEA model is often different from a model developed for manufacturing. The symmetry of a model can often be exploited. Minor features, such as rounds, fillets, chamfers, and holes, can often be ignored unless they are expected to have a large effect on the result. Therefore, the general recommendation is to use the simplest model possible that is going to yield reliable results at the lowest computational time and cost. In the example shown in Figure 1–7, the area of interest is the stress in the weld between two pipes due to high pressure. The FEA model for the component is shown on the right. In this case, the symmetry of the component (1/2 of the component) is used for the FEA model. The minor rounds, fillets, chamfers, and holes are also ignored. Note that the FEA model would be different if the area of interest was the stress at the intersection of lips and pipes. Figure 1–7 It must be emphasized that CAD model simplification is optional. If your model is not overly complex, and could be computed within a reasonable time, it is best to solve it "as is", without any simplification or defeaturing. Sample provided by ASCENT for review only All copying and reuse strictly forbidden.