Problem with the results in abaqus
Problem with the results in abaqus
(OP)
Hi, i'm new to abaqus and i am trying to make some tests in a wheel. The wheel is made only by carbon fiber.
I think that i made everything right, choosing the material, the composite layups for the rim and for the wheel walls, the load. However i'm not so sure about the BC's that i choose, they might not be the right ones.
So, when i run the job, in the result the deformation doesn't match with the expected...the expected is the rim to bend on the extremity's due to the applied pressure. But the result shows an expansion of the wall near to the rim as i show in the picture
http: //alojaima gens.com/i mages/u1cu 6n16n7p2ao mvjyia.jpg
http: //alojaima gens.com/i mages/qecm 6sqqx1o9nx zgu6zd.jpg
I appreciate all the help
Tiago Carrola
I think that i made everything right, choosing the material, the composite layups for the rim and for the wheel walls, the load. However i'm not so sure about the BC's that i choose, they might not be the right ones.
So, when i run the job, in the result the deformation doesn't match with the expected...the expected is the rim to bend on the extremity's due to the applied pressure. But the result shows an expansion of the wall near to the rim as i show in the picture
http:
http:
I appreciate all the help
Tiago Carrola





RE: Problem with the results in abaqus
Rob Stupplebeen
https://sites.google.com/site/robertkstupplebeen/
RE: Problem with the results in abaqus
What am i doing wrong?
Thanks for the reply
RE: Problem with the results in abaqus
RE: Problem with the results in abaqus
No, i'm not applying tie constrain between them.
And the values for the material are:
E1=E2=70 GPa
Nu12=0.1
G12=G23=600 MPa
G13=570 MPa
I'm making seed, and then mesh instance..i'm not distribute the nodes by myself.
I need a result like these one
http:
RE: Problem with the results in abaqus
RE: Problem with the results in abaqus
In the pictures you can see, i applied a pressure to the internal part of the rim
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then i made the BC's, a displacement for the center wheel, where will be the bearings
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and finally a encastre where will be the fixation of the wheel that permits the rotation of the wheel.
http:
i don't understand what i'm doing wrong..maybe some kind of propertie that doesn't allow me to see deformations on rim.
When you apply pressure to a rim, the rim it's suposed to bend due to pressure, not having the results that i'm getting
RE: Problem with the results in abaqus
RE: Problem with the results in abaqus
RE: Problem with the results in abaqus
http
To the center of the wheel i applied the displacement/rotation BC and i constrain the U2 and U3
http:
RE: Problem with the results in abaqus
RE: Problem with the results in abaqus
here goes the file, feel free to check it
RE: Problem with the results in abaqus
RE: Problem with the results in abaqus
RE: Problem with the results in abaqus
RE: Problem with the results in abaqus
RE: Problem with the results in abaqus
1. Material properties are in meters. Your model is ~400 units in diameter. If you use meters for your material...then your model is 400 meters in diameter and your thickness is 0.00018 meters thick. In other words, you have a lot of unit inconsistencies here that are leading to a very unrealistic/incorrect model. (abaqus is unitless, it's up to the user to stay consistent)
2. You have a curvature based mesh that has the nodal normal and element normal issues as described in the picture above. You may need to do local mesh refinement in those areas to prevent the elements from wrapping too much.
3. Overall your mesh is too coarse.
RE: Problem with the results in abaqus
And i will try to do local mesh on the rim, where is the cause of all trouble. Not so sure if i'am able to do the right thing on the mesh though due to my inexperience with meshing.
But i really appreciate all your efforts to help me!
RE: Problem with the results in abaqus
htt
do you think my problem still is the mesh, or maybe i'm having another kind of trouble?
RE: Problem with the results in abaqus
RE: Problem with the results in abaqus
RE: Problem with the results in abaqus
RE: Problem with the results in abaqus
RE: Problem with the results in abaqus
RE: Problem with the results in abaqus
RE: Problem with the results in abaqus
Error in job Job-1: Too many attempts made for this increment
i have already increased the maximum number of increments, decreased the initial increment size and the minimum value.
I'm sure that the cause is this load with the sector, because when i try without that load there are no problems
RE: Problem with the results in abaqus