Dear colleagues
Hope you're fine.
I'm modeling a 2D-Axisymmetric model of a dental implant in the jawbone.
I need to know if the applied boundary conditions are reasonable?
I have only constrained the boundary of the cortical bone in the vertical and rotational (about the axis of rotation)...
Thanks FEA way for reply
Given that we have orthotropic material properties in x y z directions, how can we enter them in an axisymmetric model with elements that include twist(eg. CGAX4) ?
Also how can we test and check wether the material properties are properly entered and the model is...
Hello everyone
I'm trying to model a threaded connection by a 2D axisymmetric model.
I need to use anisotropic material properties for a part in this model.
Is it applicable to assign anisotropic material properties to a 2D axisymmetric model.
If yes, how this can be done?
Best,
Yunus.
Dear colleagues
Hope you're fine.
I'm trying to model a threaded connection with a 2D axisymmetric model.I need to make several models with slight changes and differences.
When submitting some models for analysis they get aborted due to
some nodes have Negative coordinate values error.
When I...
To whom it may concern
In UMAT subroutine, despite of USDFLD subroutine, you don't need a utility routine like GETVRM to call STATEVs, You can directly define and call them in your code since they are passed in to UMAT ant the beginning of the increment.
for example:
subroutine...
Dear colleagues
I wonder how I can call and use STATEVs of previous increment(s) in UMAT subroutine?
Thanks in advance.
PS: I know that in USDFLD subroutine you can use GETVRM utility routine to access STATEVs and any other material point variable but in UMAT this utility routine can't be called.
Dear FEA way
thanks for your reply.
Time averaging.
I have tried the following solutions but still none of them worked out:
1. Using Solution dependent state variables (SDVs) ====> the problem is that the dimensions of the SDV arrays and how to work with them is not clear, for example:
In...
Hello dear colleagues
hope you're fine.
I wonder if there is a way to average a field output (eg. Von mises stress) in last 10 increments for each element using:
a. Abaqus subroutines
b. Abaqus python scripting
c. any other way
Thanks in advance,
Yunus.
PS: I'm using the USDFLD subroutine...
Hello everyone
Hope you are fine.
I have 2 questions about USDFLD:
1. In case I have 3 Materials (3 Field variables) and I am using USDFLD in the 4th step, by which Material the analysis gets done in 3 previous steps?
In another words, before USDFLD starts working, which material is used?
2...
Yes, this model seems to be beneficial for future reference for who wants to model a screw in 2 or 3D.
Here I kindly attached the model files.
can't wait for your great tips,
Regards,
Yunus...
Hello again
I tried the 1rst and 2nd method and I found the root of convergence problem.
As you kindly mentioned, there is a gap between two parts,however not at the beginnig of the step but once the moment is applied.
The moment along Pin's axis seems to shrink it in radial direction and there...
Thanks dear FEA way for your complete response and various methods to tackle this problem :
1. Displacement control load to establish contact
2. Automatic stabilization
3. Dynamic quasi-static step
4. Discrete dashpots
I should do a search about last three ones, but about the first one, you...
About the gaps I'm sure that there isn't since the inner diameter of the box is exactly equal to the outer diameter of the pin, and it can be checked visually.
But if I don't use force control (ie. the 0.2 N.m moment), then how can I apply the exact 0.2 N.m torque on the pin?
I'd also...
