This option is used to specify the quasi-Newton method instead of the standard Newton method for solving nonlinear equations or to specify a separated solution scheme for coupled temperature-displacement and coupled thermal-electrical procedures.
Products: Abaqus/Standard Abaqus/CAE
Type: History data
Level: Step
Abaqus/CAE: Step module
“Fully coupled thermal-stress analysis,” Section 6.5.4 of the Abaqus Analysis User's Manual
“Coupled thermal-electrical analysis,” Section 6.7.3 of the Abaqus Analysis User's Manual
“Convergence criteria for nonlinear problems,” Section 7.2.3 of the Abaqus Analysis User's Manual
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 THERMAL-ELECTRICAL procedure and the *COUPLED TEMPERATURE-DISPLACEMENT procedure without the ELECTRICAL parameter.
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.