Modeling shear strain using 3D part

[tamoora1983]

First post so forgive me if it's a silly question, trying to model this simple loadcase but I am not getting the expected results.

Here is what my results look like in Abaqus, what could I be doing wrong? Or in other words, how would you model this loadcase in Abaqus CAE?

 

[Mustaine3]

'looks like a nice example for 'Hourglassing'.
Google it, learn what it is and try again with C3D20R elements.

 

[tamoora1983]

Thanks Mustaine, so you think I need to go with a 3D model? How should I apply the force? Should I use the traction force with magnitude = 1000N / (0.2m *0.02m) ?
I tried several things and I am not able to get close to the hand calculations [ delta_x = (F*h)/(A*Shear_modulus) = 1.67e-7 m ]

 

[Mustaine3]

Yes, you can run it 2D. But here the same counts regarding Hourglassing.
2D would also eliminate the question how to apply the force.