Hi all,
I am using abaqus to model a nanoindentatin problem and always meet some
warnings. There are generally three types of warnings, as shown below.
Is there anyone who know how to resolve this kinds of problem. I have
been struggling to this problem for a couple of days. So, you help will
be highly appreciated.
***WARNING: THE REFERENCE NODE 1 (ASSEMBLY) IS PART OF THE CONNECTIVITY OF
ELEMENT 3601 INSTANCE SUBSTRATE-1 AND PERHAPS OTHER ELEMENTS AS
WELL. REPOSITIONING THIS REFERENCE NODE MAY DISTORT THE ELEMENTS
ASSOCIATED WITH THIS NODE. THUS, THE REFERENCE NODE WILL NOT BE
REPOSITIONED.
***WARNING: Rigid body reference nodes will not be repositioned if the
reference node is part of the connectivity of one or more
elements. Repositioning such nodes may distort the elements
associated with the node. Such reference nodes have been
identified in node set WarnNodeRefNoReposDistortStep1Inc0.
***WARNING: THERE IS ZERO MOMENT EVERYWHERE IN THE MODEL BASED ON THE DEFAULT
CRITERION. PLEASE CHECK THE VALUE OF THE AVERAGE MOMENT DURING THE
CURRENT ITERATION TO VERIFY THAT THE MOMENT IS SMALL ENOUGH TO BE
TREATED AS ZERO. IF NOT, PLEASE USE THE SOLUTION CONTROLS TO RESET
THE CRITERION FOR ZERO MOMENT.
Thanks !