Hi,
I like to model spinal ligaments as 1D, point to point force actuators obeying the following formula where the force in the actuator is a function of strain and some material constants: F_lig (strain) = a*ln(e^(strain + b)/d + 1) + c
Could someone comment on how this can be modeled in HyperMesh to run a non-linear static job in OptiStruct?
Thank you,
Riza.