Muscles with shared tendon

[Morteza Khosrotabar]

Hello Dear Forum Friends,

Is there anyway that I can build muscles with sharing tendon? for example in the case of triceps surae muscles and Achilles tendon.

I was thinking to add another muscle and set its maximum isometric force to zero and in this way I could consider it as a tendon. does this way make sense?

thank you very much
Morteza,