the force is alway equal to zero for any nodes 1

[R.Guo]

I don't know the reason that the force is equal to zero for any node. Of course, the job is success, and we can get displacement for any node.

 

[Dave442]

have you applied a displacement/constraint at the nodes where you are measuring reaction force?

if so, are you plotting the correct component of reaction force?

 

[R.Guo]

Thank you for your answer.
I simulated three point bending. Therefore, I applied a displacement/constraint at the reference point of the discrete rigid part not at node of the deformable part. Along with the deformation, there is no force value at any point of the deformable part. However, there is displacement value. Of course, at the reference point there is reaction force at the relevant component. But I want to get some load value at some nodes of the deformable part.

 

[Mustaine3]

The deformable part has no applied load, so you won't get any reaction forces or CF or P here. In your case the load is transmitted through contact, so look at that output.
Also define a history output request for each contact and request CFN or CTF for each. Then you can look at those curves after the analysis.

 

[R.Guo]

Sincerely thank you.