I did try with symmetry on just plane (along the width).
I am not able to stabilize the model.
I get the dreaded 9137. How can I stabillize the model?
The rollers are constrained to move in the vertical direction and the bottom roller it fixed in place.
Just another follow up question here,
I have never worked with symmetric models before.
The model I shared for example, has a von mises of ~170 MPa.
But according Mý/I,it should show ~330 MPa.
Should I double the stress results? Why is the FEA results different? Am I missing something...
@karachun,
I modelled a rectangular beam with frictionless contact.
How can I model a remote force with an RBE element?
MOdel attached
@rb1957,
The hand calc was done with Hook'es law.
However from the experiments my cermaic composite does not agree with Hooke's law in the linear range...
Yes, the FE material input is correct.
I did a quick hand calc and I see a max stress of 25 MPa.
I have 40 MPa in Femap.
The material should not have fractured at this level.
What could be the reasons?
@rb1957 Thanks for the response.
I understand that the stress is not material dependent.
Yes, I am expecting a strss range of 300 MPa which is the flexure strength of the material.
The Area Inertis is tough to calcuate given the complicated cross section. Is there a way I can take it out of...
It is not a simple beam I am testing, it has a cells inside (cross section as shown).
@rb1957 , it failed under bending. It is a ceramic composite and hence brittle.
@karachun, The contact is a fritcional contact.
In the FE model, have you constrained the rollers to displace only in ther...
Hi all,
Note: I have read through many posts before posting here as I was not able to find a convincing answer.
My first post but a long time follower. :)
So please be kind If am using the wrong forum to post this.
I am trying to model a 4- point bending test of a ceramic composite.
But...
