Isostrain Boundary condition at top of surface using ABAQUS

[fifiariff]

Hi Guys,

I am currently trying to assign isostrain(constant displacement at x,y and z-direction) boundary condition at the top of surface of the model. However, i don't know how to assign it. Attached is a sketches of boundary condition for my model. Can someone please help me solve this problem?

Thank you.

 

[FEA way]

If you are talking about constant applied displacement, it can be easily done using Displacement/Rotation BC type (non-zero values in step). For something more complex like making sure that all nodes belonging to particular regions will have the same displacement you will likely need an equation constraint. Check its definition in the documentation.

 

[fifiariff]

Thank you for your response.

yes, it about the constant applied displacement. what do you mean of non-zero values in step? is it like this(see the below image)?

tq.

 

[FEA way]

You can select proper DOFs (usually not rotations like you did here but some of the three translational degrees of freedom above) and instead of 0 specify some value that you want to prescribe.