FreeCAD: Stress Analysis (1/3)

Summary

In this tutorial, we will do static analysis for loaded L-shape joint and get it's deformation and stress. Then we will change the shape parametrically to improve the result.

Creating the shape

1. Creating new document

   Start FreeCAD and create new document.

2. Creating new sketch plane

   Switch workbench to Part Design workbench.

   Create new sktch plane and select XY-plane on the dialog. Then click OK.

   

3. Drawing the sketch

   Select polyline and draw rough sketch for the joint.

   

   With holizontal distance constraint and vertical distance constraint, set the length and width to 100 mm and 30 mm, respectively, as shown in the figure below.

   

   Round the corner of the L-shape with fillet.

   

   Select the rounded corner and set the radius to 5 mm with radius constraint.

   

   Create 2 circles for screw hole. Set the radius to 7.5 mm with radius constraint and the center position of the circle as shown in the figure below, with holizontal distance constraint and vertical distance constraint.

   

   Match the sketch plane origin with the point at the bottom left of the sketch with point-on-point constraint. So the sketch will be draw with green line because it is fully constrained. Then click Close on task tab to finish sketch editing.

   

4. Extruding the sketch

   Using padding, extrude the created sketch with an extrusion dimension of 5 mm to create the shape to be analyzed.

   

The next step is to set up the analysis.