Hi,

I’d like to calculate the large deformation strain tensor in a 3D deforming model. The formula is as follows:

where x’ is the reference/initial coordinate, and the deformed coordinate x = x’ + u. I tried with `Compute Derivates`

and `Gradients`

filter, however, I think these 2 filters can only take derivates of the deformed coordinates x. Is there a way to take derivates of x’?

I used the `Calculator`

filter to compute x’ = x - u, but I cannot find a function in both `Calculator`

and `Python Calculator`

with can let me compute du/dx’. Anyone has any ideas?

Thanks in advance,

Gening