ABAQUS Volume II: I–Z - Manual (Page 445)

*SOLUTION TECHNIQUE
18.24 *SOLUTION TECHNIQUE: Specify alternative solution methods.
This option is used to specify the quasi-Newton method instead of the standard Newton method for
solving nonlinear equations, to specify a separated solution scheme for *COUPLED TEMPERATURE-
DISPLACEMENT and *COUPLED THERMAL-ELECTRICAL procedures, or to specify that contact
iterations should be executed instead of regular severe discontinuity iterations.
Product: ABAQUS/Standard
Type: History data
Level: Step
References:
•
“Fully coupled thermal-stress analysis,” Section 6.5.4 of the ABAQUS Analysis User’s Manual
•
“Coupled thermal-electrical analysis,” Section 6.6.2 of the ABAQUS Analysis User’s Manual
•
“Contact iterations,” Section 7.1.2 of the ABAQUS Analysis User’s Manual
•
“Convergence criteria for nonlinear problems,” Section 7.2.3 of the ABAQUS Analysis User’s Manual
Required parameter:
TYPE
Set TYPE=QUASI-NEWTON to specify a quasi-Newton solution method.
Set TYPE=SEPARATED to specify that linearized equations for the individual fields in a
fully coupled procedure are to be decoupled and solved separately for each field. This option
can be specified only with the *COUPLED TEMPERATURE-DISPLACEMENT and *COUPLED
THERMAL-ELECTRICAL procedures.
Set TYPE=CONTACT ITERATIONS to specify that contact iterations should be executed
instead of regular severe discontinuity iterations.
Optional parameter:
REFORM KERNEL
This parameter can be used only with TYPE=QUASI-NEWTON. Set this parameter equal to the
number of quasi-Newton iterations allowed before the kernel matrix is reformed. The default is
REFORM KERNEL=8.
18.24–1
ABAQUS Version 6.1 Module: ID:
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