*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 iterat ions.
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,” Section6.6.2 of the ABAQUS Analysis User ’sManual
•“Contact iterations,” Section 7.1.2of the ABAQUS Analysis User ’sManual
•“Convergence criteriafor 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 specifiedonly with the *COUPLED TEMPERATURE-DISPLACEMENT and *COUPLED
THERMAL-ELECTRICAL procedures.
Set TYPE=CONTACT ITERATIONSto 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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