| Iterative
solution procedures |
A description of nonlinear
iterative methods including Newton-Raphson, line
search procedures and separate iterative loops for
contact analyses |
| Load
incrementation procedures |
A description of load
incrementation methods including manual, automatic,
mixed, arc-length procedures, automatic step reduction,
termination, convergence and output |
| Nonlinear
control parameters |
A description of the
parameters, their meaning and typical values found in
the nonlinear control forms.
A description of the parameters on the
nonlinear control dialog. Wherever possible, the default
values of the nonlinear control properties should be
used - they represent generally applicable settings that
automatically activate additional facilities as required |
| Load
case and load increment |
Answers the question
"what is the difference between a load increment
and a load case?" |
| Interpretation
of the nonlinear log file |
The nonlinear log file is
of immense help in ascertaining whether the nonlinear
analysis is progressing well. If it is not, it gives
valuable information to help locate the cause of the
problem |
| Modified
Newton-Raphson |
A description of the
iterative solution method called the modified
Newton-Raphson technique |
| Current
stiffness parameter |
A description of the
meaning of the nonlinear log file parameter CSTIF,
including its definition and how it helps interpret what
is happening in the nonlinear analysis |
| Residual
convergence criterion |
Answers the question
"what is the residual norm (RDNRM) and what value
should be used?" |
| Loading
procedures |
Describes the difference
between automatic and manual load incrementation
procedures and demonstrates, with examples, how to mix
them together to obtain any required loading history |
| Elasto-Plastic
material model description |
A detailed description of
the current elasto-plastic material models available
together with their hardening types |
