"internal force" as a function of time

[abbasp]

Dear fmk,
Is it possible for me to define the "internal force" as a function of time? I mean is it possible to implement "delta t" in the element class so that the element internal force could be dependent on the time steps?

Thanks.

[fmk]

would be a special element, but you could implement something .. you might add it such that a load would set the axial force in the element so element does not have to deal with time in the domain and possibly a timeseries lass.

[abbasp]

Thanks dear fmk. As another question, I have two types of element in one domain which one of them should be solved by Newmark Method and the other should be solved by a new integrator. Is it possible to define these two methods in a common procedure?
I mean, for example:
For elements No. 1, 2 & 3 use Newmark method and for element No. 4 & 5 use new method.

[fmk]

what do you mean by the elements need to be solved by Newmark and the other by something new .. do the elements iteerate?