To start this tutorial, you have to import the tutorial project into your ‘Dashboard’ via the link above.
Once the ‘Work bench’ is open you will be in the ‘Geometries’ tab.
The CAD model named “crane” would be displayed in the viewer, as shown below
You can interact with the CAD model as in a normal desktop application
Create a Static Analysis
To create a new simulation click on the ‘+’ option next to the ‘Simulations’ tab
In our case we are interested in running a static stress analysis, so select the Static Analysis option and press ‘Ok’
After clicking ‘Ok’, a new tree will be automatically generated in the left panel with all the parameters and settings that are necessary to completely specify such an analysis.
All parts that are completed are highlighted with a green check. Parts that need to be specified have a red circle. While, the blue circle indicates an optional settings that does not need to be filled out
Creating the mesh
Select the mesh option and set the parameters as shown in figure below
The default mesh parameters are used in this tutorial
The Tet-dominant mesh algorithm is the only option available as this is an FEA application
Automatic mesh sizing with First Order elements are used
As for the fineness of the mesh, Coarse is sufficient.
For actually starting the mesh operation hit the ‘Generate’ button, highlighted in the figure below
The resulting mesh is shown in figure below, it contains about 85000 elements
There is also a Meshing log (highlighted below) available which provides quantitative information about the mesh in terms of its node and element count and other relevant data
This completes the mesh generation.
A gravitational load can be applied on the whole domain in the Model section. In order to specify a gravitational load you have to determine the magnitude and the direction of the gravity field. We apply a gravitational load of 9.81 m/s² in the -y direction (direction vector: 0 -1 0).
Material selection and assignment
Next, add the materials from the ‘Material Library’ for fluid and the solid phases. First, we start with clicking on sub-tree “Materials”, click on ‘+’ from the options panel as shown.
This pops-up a ‘Material Library’ from which we select “Steel” and click on ‘Ok’. This will then load the standard properties for steel.
Then, assign the material to the volume ‘solid_0’ and save.
Now, we come to define the boundary conditions.
To create a boundary condition, click on the ‘+’ option next to the Boundary conditions and select the required boundary condition from drop down menu, as shown in figure.
As the crane should be fixed on the one end, we start with a constraint boundary condition.
For this select the ‘Fixed Value’ boundary condition from the drop down menu
Set the displacement to zero in all directions, as shown on figure.
Next, assign this boundary condition to the the three faces at the end of the crane structure (faces highlighted in figure)
Clicking on Save (the blue tick button) completes the definition of this boundary condition
Next add a Pressure boundary condition. We simplify the load caused by a lifted body by a negative pressure (force F boundary condition: Pressure) on the lower face of the box at the end of the crane opposite to the fixed boundary condition.
The load is assumed to take the value 10000N. As pressure is a distributed loading type it is necessary to apply the load using N/m² as unit. So we divide the load by the area of the face (0.25 m²) and get a value of 40000 N/m².
This is assigned to the lower face of the box (highlighted in figure below)
The tree item Numerics allows us the control the solving mechanism in detail
In this tutorial, we use the default Numerics as shown in the figure below
The next important tree item is Simulation Control which allows to steer the overall simulation settings
We choose a 8 core machine for the computation to have enough computing power for the considerably large mesh
Start a simulation run
The last thing to do for running this simulation is to create a run.
The new run is created by clicking on the ‘+’ symbol next to ‘Simulation Runs’
Give a name to the run and start the run
Once the simulation is finished, select the ‘Solution fields’ under the Run to post process the results on the platform. Or they can be downloaded and post-processed locally (e.g. with ParaView)
Some post processing images from the SimScale platform post processor are shown below.
Select the results and click “All Displacement” to visualize the Displacement Profile.
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