ERROR on msg file and analysis cannot continue
ERROR on msg file and analysis cannot continue
(OP)
Hi all,
I am doing analysis on axial pressure on the 2D hemisphere by using modified riks method.
After 50 increment there is still no yield thus I increase to 80 increment.
However the analysis cannot continue as I encounter errors
THE STRAIN INCREMENT HAS EXCEEDED FIFTY TIMES THE STRAIN TO CAUSE FIRST YIELD AT 1 POINTS.
Here is the input file. Could anyone enlighten me on this error and help me to continue running the analysis?
I am doing analysis on axial pressure on the 2D hemisphere by using modified riks method.
After 50 increment there is still no yield thus I increase to 80 increment.
However the analysis cannot continue as I encounter errors
THE STRAIN INCREMENT HAS EXCEEDED FIFTY TIMES THE STRAIN TO CAUSE FIRST YIELD AT 1 POINTS.
Here is the input file. Could anyone enlighten me on this error and help me to continue running the analysis?





RE: ERROR on msg file and analysis cannot continue
corus
RE: ERROR on msg file and analysis cannot continue
Does it mean that I only need 2 nodes which is node 1 and 999 for the center (at the origin). I have to model hemisphere based on ratio radius(R) over thickness(t) =100
thickness is 1 and H which is the distance from apex of the hemisphere to the center is 0.01R=1
RE: ERROR on msg file and analysis cannot continue
RE: ERROR on msg file and analysis cannot continue
Distributed load will apply from above to the surface of the hemisphere.
Hope anyone can help.
thanks in advance.
RE: ERROR on msg file and analysis cannot continue
Also, as Corus said, the geometry is not a hemisphere. You appear to have modelled a full cross section of a hemisphere rather than half the (revolved) section. An axisymmetric model is the 2D represtation of a 3D model revolved about the y-axis.
Regards
Martin Stokes CEng MIMechE
RE: ERROR on msg file and analysis cannot continue
You will obviously need more than 2 nodes in order to model a hemisphere, otherwise it would be just a cone shape. If you're referring to the geometry definition in CAE then 2 points will be sufficient, with an arc drawn between them.
I think you really need to look at examples of axisyemmtric geometry as I don't think you understand the concept. There may be some in the Abaqus documentation.
corus
RE: ERROR on msg file and analysis cannot continue
The dome must be fixed at node 1( ive included the coordinate as well from calculation) and at the opposite.
Distributed load DLOAD will apply from above.
What chapter I need to find to read about axysymmetric modelling?
thx
RE: ERROR on msg file and analysis cannot continue
Regards
Martin Stokes CEng MIMechE
RE: ERROR on msg file and analysis cannot continue
Any tips to write the coding? As far as it concerns the section 3.1 only apply when drawing the part.
RE: ERROR on msg file and analysis cannot continue
There are a few rules with axisymmetric elements in ABAQUS;
- The axis of rotation is the 2 direction (y axis).
- You cannot have negative coordinates in the 1 direction (x axis).
Regards
Martin Stokes CEng MIMechE
RE: ERROR on msg file and analysis cannot continue
http
or here? http
can you provide the link please?
thx
RE: ERROR on msg file and analysis cannot continue
I don't have access to the v6.4 docs, but like I said above, do a search for 'axisymmetric' in the docs and you will find plenty of relevant material.
Regards
Martin Stokes CEng MIMechE