Abaqus generalized plane strain problem

[ggyjwmelo]

Hi, I am currently modelling generalized plane strain problem. My purpose is to apply and fix the out-of-plane strain in the entire simulation(33 direction).
Refer to Abaqus manual, I set a reference point in Part>Tool>reference point and inputed the fixed out-of-plane strain in Creat Section>generalized plane strain by assigning the thickness of reference point. The generalized plane strain element was used in Mesh. But when I checked out the results, I found that the out-of-plane strain varied in every step instead of keeping constant.

Thanks so much!

JY

 

[ggyjwmelo]

Anyone can help? Thanks!

 

[MechIrl]

Don't you just want 'plane strain' in this case? Generalized plane strain assumes the same, but necessarily constant, out of plane strain everywhere.

 

[ggyjwmelo]

Thanks for your answer! I think plane strain condition assumes the out-of-plane strain to be zero everywhere, my purpose is to let the out-of-plane strain to be some fixed value. So how can I make it possible? Thank you!

 

[corus]

You need to just restrain the rotation of the reference point/plane. In that way the out of plain displacement (strain) remains constant but not zero. If I recall, this means manually editing the inp file to get the correct dof. Check the manual for the rotational dof to restrain. You don't assign a thickness to the reference point as that makes no sense. Generally you need generalised plane strain in thermal strain analyses otherwise you just use plain strain.