3/1/2024 0 Comments Freecad tutorial pdf cylinder![]() The results displayed by the FEM workbench are of course currently not enough to perform real-life decisions about structures dimensioning and materials. You will be able to see the deformation growing as you apply more force: Set the type of result that you want to see on the mesh, for example "absolute displacement", tick the show checkbox under Displacement, and move the slider next to it.Close the task panel, and see that a new Results object has been added to our analysis. A few moments later, the calculation will be done: inp file button to create the input file for CalculiX, then the Run CalculiX button. In the task panel that will open, click first the Write.Select the CalculiX object in the tree view, and press the Start Calculation button. We are now ready to start the calculation.Click the top face of the roof, set the pressure to 10MPa (the pressure is applied by square millimeter) and press the OK button.For this we will use a pressure constraint. We will now add a load on the top face, that could represent, for example, a massive weight being placed on the roof.The bottom face is designated as unmovable: Click on the bottom face of our building and press the OK button.Let's start by specifying which faces are fixed into the ground and can therefore not move. In the Material drop-down list, choose the Concrete-generic material, and press the OK button. A task panel will open to allow us to choose a material.Select the analysis object, and press the New Material button. This is important because depending on the material strength, our object will react differently to forces applied to it. ![]() We can now define the material to be applied to our mesh.After pressing the OK button and a few seconds of calculation, our FEM mesh is now ready:.For now, we can leave the default value of 1000: The main setting to edit is the Max Size which defines the maximum size (in millimeters) of each piece of the mesh. Here you can define the meshing parameters to be used to produce the FEM mesh. A new analysis will be created and a settings panels opened.We are now ready to start a FEM analysis.Switch to the Part Workbench, select the two objects, and press the Union button. Therefore, we need to join our two objects (the wall and the slab). The FEM Workbench can currently only calculate deformations on a single object.Now move the roof slab down so it rests on top of the wall: Edit the Rectangle object that we used as a base of the roof slab, and change its Placement->Position->X value from 3.18m to 3.00m.Instead, we will assume that the roof slab is placed directly on top of the wall. They are very different objects from the rest of the house so we will simplify our calculation by not including them. ![]()
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