J integral

[zaxo]

am trying to retrieve the J integral results for a simple edge cracked plate. Does anybody know now to do it?
Here is my input:

NSEL,,NODE,,30,30,,
CM, crack_tip_node, NODE
CINT,NEW,1
CINT,CTNC,crack_tip_node,
CINT, SYMM, ON
CINT,NORM,0,2
CINT,NCONT,5
OUTRES,CINT,Last
OUTPR,CINT,Last
NSEL,All,,,,,,

Here is all I am getting:

CINT CALCULATION FOR CRACK # 1
NUMBER OF CONTOURS 5
SYMMETRICAL CRACK YES
CRACK PLANE NORMAL CSYS= 0 AXIS= 2
*** LOAD STEP 1 SUBSTEP 1 COMPLETED. CUM ITER = 1
*** TIME = 1.00000 TIME INC = 1.00000

 

[prost]

For my own curiosity, what software is this?

Also for my curiosity, how does the computed result compare to the many analytical curve fit results (such as found in Tada and Paris, "Stress Analysis of Cracks Handbook")?

 

[zaxo]

The code is ANSYS. I forgot to post this with my question, as I posted it in an ANSYS forum before that.

I have compared the solution to stress intensity KI analytical solution and the result was within 1% difference for an edge cracked plate. ANSYS can do directly calculate K which is a bit more tedious partly because of the requirement for singular elements at the crack tip. I prefer the J procedure mostly because of the coarser mesh that can be used and the straight foreword procedure.