Creep and stress relaxation

[Stealth101]

Hi all, I have a question.

Does exists a software that is able to calculate creep and stress relaxation of a model of springs and dampers?

Is Matlab/Simulink able to do this?

Thanks in advance.

[Mapes]

Hi Stealth101, welcome to PF. If you're able to put the components' constitutive equations together in the s-domain, any symbolic software should be able to find the inverse Laplace transform, which will give you the equations you're looking for. Mathematica can do it, certainly; I'm pretty sure the Matlab can also, but I don't have that immediately at hand.

[Stealth101]

If you're able to put the components' constitutive equations together.

I have some doubts about the equations, because I have to study a model without a free "extremity" so I can't apply the Heaviside step function in the classic way.

Practically this model has the "chassis" both on the right side and left side.

I'm sorry for my poor English.

[Mapes]

Still, if you can turn all the components into impedances (k for springs, sω for dashpots), hopefully you can combine them like springs and get displacement as a function of load.