[Univ of Cambridge] [Dept of Engineering]

The ABAQUS FAQ


23. Post processing using FEMGV

Q23.1 : Is it possible to have a 2-plot layout instead of the 1, 4 plot layouts?

No. It is not possible to have 2-plot layout with FEMGV.


Q23.2 : Is it possible to write out the results of a XY Plot to an external ascii file?

Yes. Use the following commands.
UTILITY TABULATE OUTPUT PRINTFILE OPEN file-name
< Then issue commands to draw the plot>  
PRESENT GRAPH LINE OLD
CLOSE file-name

Here use an appropriate file name instead of file-name. If no file name is specified the data is written to a file called fgvlst.lst.


Q23.3 : Is it possible to read in the results of a XY Plot from an external ascii file?

No it is not possible to read in results from an external ascii file which contains x and y values to be used in XY Plots.


Q23.4 : Is it possible to cut open and develop a cylindrical mesh and produce contour plots on the developed flat surface?

Yes it is possible. Use the following commands to develop the surface.
VIEW DEVELOP X (develop model about X axis. Similarly about other axes)

Then issue commands to plot the contours.
It is also possible to cut open non-developable surfaces using this option.
The command to revert back to the original surface ...


Q23.5 : Is it possible to take an arbitrary line section through a 2D model and display the variation of a selected output parameter (example : von Mises stress) along that line?

Yes. Use the following commands.
CONSTRUCT LINE FREE /CURSOR
< This is followed by 2 cursor clicks to indicate 2 points to define line >
< Then issue commands to draw the plot >  
PRESENT GRAPH LINE OLD



Q23.6 : Is it possible to take an arbitrary section through a 3D model and display contours of a selected output parameter (example : von Mises stress) on that section?

Yes. Use the following commands.
First choose the right direction of view for making a cut.
EYE DIRECTION X  Y  Z
Then make the cut.
CONSTRUCT XSECTION /CURSOR
< This is followed by 2 cursor clicks to indicate 2 points to define plane >
EYE NORMAL (to get a view normal to cut section)
RESULTS NODAL STRESS XX  (select an output parameter)
< Then issue commands to draw the plot >  
PRESENT CONTOURS LEVEL 10



Q23.7 : Is it possible to produce a contour plot of the un-smoothed stresses?

If the stresses at the integration points are written to the results (*.fil) file along with the integration point coordinates then it is possible to plot contours of the un-smoothed stresses.
Use the following commands for this.
RESULTS GAUSSIAN STRESS component
Example : RESULTS GAUSSIAN STRESS XX
 PRESENT CONTOUR LEVEL 10  or P C L 10 (in short)

Similar plots can also be obtained for strain components.


Q23.8 : Is it possible to produce a contour plot of the smoothed stresses if only the stresses at the integration points were written to the results (*.fil) file?

Yes it is possible. Use the following commands.
 RESULTS GAUSSIAN STRESS component
Example :  RESULTS GAUSSIAN STRESS XX (select the first stress component)
 RESULTS CALCULATE AVERAGE  (this calculates averaged nodal values)
 RESULTS NODAL STRESS  component (select nodal stress component)
 PRESENT CONTOUR LEVEL 10  or P C L 10 (in short)

Similar plots can also be obtained for strain components.
The alternate option is to write the stresses (and strains) averaged at the nodes in the results (*.fil) file. In the ABAQUS input file use the following data.
*EL FILE, POSITION=AVERAGED AT NODES, FREQUENCY= n
S
E


abaqus-support@eng.cam.ac.uk
Last updated on 4 August 1997