![]() Expert users can also set it to User-defined and set the following parameters. For more complex models with curvatures and intersections, we can increase the element number in those regions to get better results (at the cost of more computing time, of course). Fineness: Select, how finely the model should be cut into elements.This increases computing time, but is usually a good choice if it comes to bending as in our analysis. Second order means, that in each element, additional nodes will be created.The smaller the maximum element size, the more elements we get – usually the result will get more precise, but with a dramatic increase in computing time. size is the maximum size (in millimetres) of an element. In the upcoming task window, we have to make different selections, starting from the top: We will go with Netgen here: With the Boolean Fragments objects 'bimetal strip' selected, we click on the Netgen icon in the FEM workbench. The FEM workbench offers two meshing tools: Netgen and GMSH. ![]() Since a Finite Element Analysis obviously needs elements to work with, we have to dissect our model into a so-called mesh. We close the task window and repeat the steps to create a second material 'Steel' (material card 'CalculiX-Steel') and assign it to the top strip ('BooleanFragments:Solid2'). In the list view, 'BooleanFragments:Solid1' should show up. Under 'geometry reference selector', we assign the material to the lower strip of our model by setting the selection mode to 'solid', clicking 'add' and selecting a face or an edge of the lower strip. In the upcoming task window, we select one of the predefined aluminium alloys. In the FEM workbench we create a new analysis and add a new material to the analysis. Preparing and running the FEM analysis Assigning the materials So, better get used to using Boolean Fragments in the first place.) The result should look like this: (It should also work by using the Part Compound command instead of Boolean Fragments, however, with more complex intersecting shapes, there might be trouble with the FEM analysis later. In the Property editor, we change the mode from View Standard to View CompSolid. ![]() Rename these Boolean Fragments to bimetal strip.Select both solids (using the Shift key + mouse click) and create Boolean Fragments from them.Offset this part by 2 mm along the Z-axis (via Placement → Position → z).Create a second Cube Solid 'steel' with the same dimensions.Give it the dimensions 100 x 10 x 2 mm (length x width x height).Draw a Cube Solid and rename it to aluminium. ![]()
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