J-integral : how to set the "step" between the succesive contours
J-integral : how to set the "step" between the succesive contours
(OP)
Hi everybody,
I am modeling a "seam" crack inside the geometry and i would like to compute the J-integral of that crack. So what i did is that i defined the crack tip and the direction of the crack growth.
The problem is that when i take a look at the results the first contours return quite good values but the successive contours return a value almost equal to zero as if these last contours were surrounding not only the crack tip but also the second crack tip (this is a crack inside the geometry and thus it has two crack tips) and thus the whole crack (see picture).
How can i force a kind of "contour step". What i mean is how can i impose the successive contours to only surround the crack tip and not the whole crack?
Indeed my crack is very small compared to the global geometry of the model but i need to compute the J-integral of that small crack.
I am using a very refined mesh but it doesn't help...
Thanks,
Malik
I am modeling a "seam" crack inside the geometry and i would like to compute the J-integral of that crack. So what i did is that i defined the crack tip and the direction of the crack growth.
The problem is that when i take a look at the results the first contours return quite good values but the successive contours return a value almost equal to zero as if these last contours were surrounding not only the crack tip but also the second crack tip (this is a crack inside the geometry and thus it has two crack tips) and thus the whole crack (see picture).
How can i force a kind of "contour step". What i mean is how can i impose the successive contours to only surround the crack tip and not the whole crack?
Indeed my crack is very small compared to the global geometry of the model but i need to compute the J-integral of that small crack.
I am using a very refined mesh but it doesn't help...
Thanks,
Malik





RE: J-integral : how to set the "step" between the succesive contours
Select "Nodes". ABAQUS creates node sets for subsequent contours. (Check "Highlight items in viewport")
Usually the first contour gives bad results. The value should converge in 3 to 5 contours if the mesh is good.
RE: J-integral : how to set the "step" between the succesive contours
You are always very helpful.
Malik