Material- damping.

[Nero]

Question:

I have a custom material I am using on a zero-length element. I know that zero-length elements are not included in Rayleigh damping, however, it looks like you can use a damping tangent value to include damping.

Lets say I am using a rayleigh stiffness damping of 0.0023. I have a gap element with my custom material, with an initial stiffness of 650. I want the damping value of this element to be 0.0023*650 (rayleigh coefficient times the initial stiffness). Would I set the damping tangent value in the material to 650 or, 650*0.0023? In otherwords, is the damping tangent value placed directly into the damping matrix? Or is it factored with the rayleigh damping coefficient?

[fmk]

650*0.0023 .. it would be placed directly into the matrix.

[Nero]

Thanks!