- Discovering examples
- Building compact discrete domains
- Introduction to input file
- Plugins and input files
- Initialize project
- Initialize your first custom plugin
- Implement your first custom plugin
- Run your first project
- granoo-viewer usage
- Inputs/Outputs with GranOO
- Building a very simple tensile test (You are here)
- Using numerical sensor
This page describes how to build a real simulation
You must follow the previous tutorial steps before starting this tutorial. You need results of previous tutorial steps. These results will be used as input data for this simulation. More precisely, you need this discrete domain
Please copy one of this domain in the current folder as it follows
Now, your current directory must look like
The input file
The goal of this simulation is to clamp the discrete element at the left and load the discrete element at
the right. This simulation can be set through input file only. You can create a new input file
tensile.inp with the following input.
Step by step description of input file
The following plugin loads a discrete domain file into the simulation
The following plugin converts all the
ElementPair (described in a previous tutorial step)
into mechanical beams.
To get full description of what this beam are, you can
consult the scientific bibliography.
The following plugin computes the optimal time step. It corresponds to the higher time step that ensures stable simulations.
The following plugin clears all the forces and torques applied to elements and bodies. After this plugin the domain is completely relaxed.
The following plugin applies a force on all the discrete elements indexed by the
left SetOf. Here, only
one discrete element is concerned. The
X=... corresponds to the value of the force along the X axis.
A mathematical formula is given that corresponds to : if the iteration is lower than 1,000, the force
is 100,000 times the iteration value or zero instead.
The following plugin computes the mechanical induced by the deformation of beams. The given loads are applied to the connected discrete elements.
The following plugin applies the velocity verlet integration scheme that computes linear and angular accelerations, velocities and displacements.
The following plugin imposes displacements to a discrete element set. Here the discrete elements are clamped (they can’t move).
The following plugin checks if the computation is right.
The following plugin saves the current state of the domain all 100 iterations.
Running example and showing results.
Run the example
Show the result
You should see the
granoo3-viewer window. If you press the Read button, you should
see an animation where you domain oscillates.