@erwincoumans I want to load prosthetic spring leg at the base of the leg, which require loading spring element.How can I simulate any rigid body to a spring?

[pramodiisc]

I want to load prosthetic spring leg at the base of the leg, which require loading spring element.How can I simulate any rigid body to a spring?
So far what I have done is attached a j shape rigid element at the base of the knee link and I gave that j shape link prismatic motion so that it can slide on the knee link and according to the j shape link displcement I am applying equivalent force that is stifness*diaplacement. But its not working. Please suggest me something nbetter anbd simple.