Pure Traction BC's in Abaqus Help!!

[scamper]

I have a simple square geometry. The material is homogeneous isotropic and linearly elastic. I am trying to do uniaxial tension test (in 1-1 direction) using pure traction BC's.

I have specified general traction on left surface with vector -1,0,0.
and on the right surface the same magnitude with vector 1,0,0.

I am having rigid body motion. Can anyone help me fix that. Do I need to specify some displacements or do something else?

Thanks

 

[InvariantL]

Try *STATIC, STABILIZE instead of just *STATIC for your procedure. In Abaqus/CAE you indicate this by clicking a button on the panel where you configure the step.

Alternatively you could just use a displacement boundary condition at one end instead of the traction. Make sure you only constrain the motion in the axial direction, otherwise your specimen won';t be free to contract laterally.

http://www.invariantlabs.com