Applying force to the model

[Torubara-Oleg]

Hello everyone!

Can anyone help me about force applying? According to example2 we apply constant force to each element that is marked with the corresponding attribute. But I don't quite understand if I increase the number of elements on the plane, but I want to keep the force constant for the entire model. Do I need to set a constant force value and divide it by the number of loaded elements or not?

For example, I have a cube. One plane is loaded, and the opposite is fixed. Each plane consists of 8 triangles, if I want to apply a force = 1 newton, then I will have to set the value of the pull_force vector in the corresponding attribute to 1 newton or (1 newton / 8)?

In other words, is the force set in the pull_force vector for the whole model or for each element?

[mlstowell]

Hello, @Torubara-Oleg,

Think of it as a force per unit area. The vector field f in example 2 is integrated over the boundary so, for a constant f, the total force being applied to the surface is the f * (area of the surface). The total force will not depend on the triangulation used to mesh the surface as long as the mesh is fine enough to capture the variation in f, if there is any variation.

Best wishes,
Mark