Good evening Sir
Is it possible that we can extract stress components at integration points/nodes and get them to Matlab? Actually, I want the stress components so that I can use them to arrive at stress resultants- bending moments.
Regards,
Rahul
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Advances in Engineering Software. Vol 105. March 2017. Pages 9-16. (2017)
Dear Rahul,
You can use the same element-type postprocessing functions of Abaqus2Matlab to extract the stresses at nodes instead of the integration points. In your case, you can use the function Rec11.m.
Regarding the beam with box cross-section which is modeled by shell elements, integration of stresses at the ends is a good way to obtain the reaction forces and moments.
Regards,
George
Also, say I have a beam with both ends fixed which I model using shell elements. My cross section is a box section in this case. I apply a transverse displacement at the right fixed end. I want to know from my abaqus analysis the reaction moments at the supports. How exactly do I achieve this?
I was thinking of using stress components at nodes and then integrating to arrive at moments. Is it the right way to go?
Regards,
Rahul
What .m file should I use for either case? Like we have Rec104.m for reaction forces and moments, what matlab function should I use?
Hello Rahul,
If you want to extract the stresses at the integration points, then you have to specify in your input file:
*FILE FORMAT, ASCII
*EL FILE
S
If you want to extract the stresses at particular nodes of your model, then you have to define an element set which contains the elements which share these nodes. For each node you have to include in the element set all the elements that share this node. Assuming that this element set is named MYELSET, you have to modify your input file as follows:
*FILE FORMAT, ASCII
*EL FILE, POSITION=NODES, ELSET=MYELSET
 S
After running the analysis, you can postprocess the generated fil file using Abaqus2Matlab, and obtain the various stress components. Please be aware that the stresses are extrapolated to the nodes of each element in the set but not averaged at the nodes.
George
Stress components at each node could also do the trick for me, right?