Hi Sirs,
As title, I wondering if the problem can be solved with only material residual stress but no other external load applied?
After several trials, Abaqus returns message
"MASS OR DIFFERENTIAL STIFFNESS MATRIX IS COMPLETELY NULL. THE EIGENPROBLEM CANNOT BE SOLVED. IN A *BUCKLE ANALYSIS THE MOST LIKELY CAUSE IS THAT A NONZERO LOADING PATTERN WAS NOT SPECIFIED VIA *BOUNDARY, *CLOAD, *DLOAD, ETC,. SEE Eigenvalue Buckling Prediction IN THE ABAQUS/STANDARD USERS MANUAL"
However, in my case, no external load but only residual stress within materials and buckling does occur.
Any expert has suggestions or experience on this? Very thanks.
FELIPE