Abaqus traction test on cylinder strange displacement

[tuocuggino]

Hi,

i imported from autocad a solid cylinder with diameter of 2.2 mm and lenght of 100 mm.

i meshed it using the C3D20R elements.
material:

*Material, name=AcciaioElastico
*Density
 7.85e-09,
*Elastic
 2e+06, 0.2

i've applied an traction force on one extreme and fix all displacement on the other.

the problem is that the displacement field is strange.
i don't have only displacements along the extrusion axis but i have also transversal displacements.

the difference between the axial and transversal displacements is only of E-01.
i expected something like E-10 of difference.

is it normal?
i'm using abaqus 6.14

Some photo of model and displacements
.inp file:

http://files.engineering.com/getfile.aspx?folder=8d24c32f-9f4a-4b5d-bf59-6f976643f934&file=Job-1.inp

 

[DrBwts]

Its hard to comment without seeing the model.

 

[tuocuggino]

you are right, sorry.

Here there are some photo and i've uploaded the inp file

photo

inp file:

http://files.engineering.com/getfile.aspx?folder=8d24c32f-9f4a-4b5d-bf59-6f976643f934&file=Job-1.inp

 

[aslfd]

hello,

Try to apply only a symmetry (XSYMM U1=UR2=UR3=0) in "encastre" section . Do not bloc u1, u2 and u3

 

[Mustaine3]

Forces (not pressure) are applied on the nodes of the face. But the distribution of the nodes on the face is not regular, so higher forces are applied in some region, which leads to a momentum.