excessive distortion error in Abaqus
excessive distortion error in Abaqus
(OP)
I am simulating a impact scenario in Abaqus Dynamic Explicit.
Abaqus throws up this error of "excessive distortion/ratio of wave speed ....greater than one" after executing certain time increments.
Can anyone pls tell me why this error occurs when we run the simulation and how to remedy it?
Abaqus throws up this error of "excessive distortion/ratio of wave speed ....greater than one" after executing certain time increments.
Can anyone pls tell me why this error occurs when we run the simulation and how to remedy it?





RE: excessive distortion error in Abaqus
termination. Do the following:
(1) Decrease the velocity of impact
(2) Change the density of the material(s) where the error occurs
(3) Change the modulus of elasticity of the material(s) where the error occurs
(4) Change the time incrementation
(5) Change the mesh refinement where impact occurs
Regards,
_______________________________________________
George Papazafeiropoulos
First Lieutenant, Infrastructure Engineer, Hellenic Air Force
Civil Engineer, M.Sc., Ph.D. candidate, NTUA
Email: gpapazafeiropoulos@yahoo.gr
Website: http://users.ntua.gr/gpapazaf/
RE: excessive distortion error in Abaqus
RE: excessive distortion error in Abaqus
#4 is not possible, since the stable increment size is calculated automatically by Explicit and the user has only limited and indirect influence in that.
- Refine the mesh and use a little bit of mass scaling when the stable increment size goes down too much. Make sure you're not changing the inertia too much with mass scaling.
- Check if you can use adaptive meshing the keep the elements in a good shape.
- Check if you can define a material failure criteria that deactivates also the elements with a failed material.
RE: excessive distortion error in Abaqus
RE: excessive distortion error in Abaqus
Are you new to this forum? If so, please read these FAQ:
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RE: excessive distortion error in Abaqus
If none of all the hints are working, the CEL method might be an option. But it would be my last choice...
RE: excessive distortion error in Abaqus
RE: excessive distortion error in Abaqus
I strongly suggest taking 'baby steps'; your statements reveal your 'kitchen-sink' strategy. For instance, ".. for some modes of hourglass control.", "Can I deactivate this element from further analysis?".
Have you gone through the Getting Started Guide (Interactive Edition)? If not, take a few days to do so - front to back.
Are you new to this forum? If so, please read these FAQ:
http://www.eng-tips.com/faqs.cfm?fid=376
http://www.eng-tips.com/faqs.cfm?fid=1083
RE: excessive distortion error in Abaqus
RE: excessive distortion error in Abaqus