Hey!
I would like to assign the nonlinear force-deflection connection to simulate the behaviour of the lumbar ligaments. I have the formula for the whole ligaemnt (e.g. Rohlmann et al. 2006). I use multiple 1D spring elements in series and in parallel to represent the ligaments.
My problem is that I couldn't define the proper characteristic of ONE element to achieve the right result after assigning it.
Can anyone help me, either with a solution or another approximation?
Thanks in advance.