Help: Abaqus-why not get the correct stress? with inp file.

[beitownren]

help: Abaqus--why not get the correct stress? with inp file.

hi, all,

the attachment is the calculation inp file for the stress of pipe.
but now i can not get the correct result.

pls help me to find the error. thanks in advance!

 

[beitownren]

hi,all;

now, there is a question about the coordinate system in ABAQUS/STANDARD.

For example, two straight line with the same node coordinates under the global coordinate system are input into the model by inp file.

if we define the line section as pipe, how do i set the constraint between the radial direction of same node in the two line?
that is to say, when the nodes are by default in the global rectangular coordinate system, i want to transform the constrained nodes into the cylindrical coordinate system, and then build the constraint equation under radial direction between two nodes.

i write the inp codes based on the above, but it is checked with many errors in the process of DATA CHECK.

would you like to give me some suggestion and recommendation to my problem?

rgds,
thanks.