Chaining with a standalone buckling solution (Simcenter Samcef)

You can chain an active Standalone Buckling solution with several other solved solutions. In the solution's Chaining page, you select the solved solution you want to chain with and define the chaining parameters.

Option	Description
Activate Chaining	Activates chaining.
Chaining Type	Specifies the chaining type:Stability Analysis on a proportional loading—Equivalent to a classic Buckling Analysis but in this chaining type:You can select the load case to use as a reference configuration.You have more control of the contact conditions that exist in the linear static referenced solution.Incremental Stability Analysis—Performs a Standalone Buckling solution around a nonlinear configuration.Chained thermal-structural analysis—Performs a classic Heat Transfer - Standalone Buckling chaining.Chained thermal-structural analysis with dissimilar mesh—Performs a Standalone Buckling solution after a Mapping solution.
Source Type	Lets you select a Solution already defined in the current model to chain with or an External File Simcenter Samcef binary file (.u18) to extract chaining data from.

Stability Analysis on a proportional loading chaining type

The Stability Analysis on a proportional loading chaining type chains a standalone buckling solution with a linear static one. In the active standalone buckling solution, you select the previous linear solution's load case you want to use as reference configuration.

Option	Description
Contact Control	Specifies how the contact conditions defined in the linear static solution are handled. Free normal and tangential contact degrees-of-freedom—The status of the contact conditions defined in the linear static solution are ignored in the standalone buckling solution. All the contact degrees of freedom are free.Normal contact d.o.f. depends on contact status in the prerequisite solution—The normal contact status (fixed or free) computed in the linear static analysis is maintained in the standalone buckling.Normal contact and sliding d.o.f. depends on prerequisite solution—The normal and sliding contacts status (fixed or free) computed in the linear static analysis is maintained in the standalone buckling solution.For more details, see the CONFIX parameter of the .ALGO Samcef command.
The following options apply if either the Normal contact d.o.f. depends on contact status in the prerequisite solution or the Normal contact and sliding d.o.f. depends on prerequisite solution option is selected from the Contact Control list.
Precision	Lets you define when a contact degree of freedom is marked as closed. If the reaction of the degree of freedom is greater than the "Precision x the greatest reaction/force on the structure" reference value, the degree of freedom is marked as closed. For more details, see the CONPRE parameter of the .ALGO Samcef command.
***_as.u18 File**	Available when you select External File from the Source Type list.Lets you select the Simcenter Samcef binary linear static results file to use as the source. For more details, see the IFPR FILE parameters of the .SAM Samcef command.
Load Case Number	Lets you select the load case number in the linear static solution. For more details, see the NPR parameter of the .SAM Samcef command.
Chaining with Solution	Available when you select Solution from the Source Type list.Lets you select the linear static solution and the load case you want to chain with.

Note:

If the model you chain with contains bolt preloads, you must ensure that these preloads are well taken into account. For more information, see Bolt conditions when chaining solutions (Simcenter Samcef).

Incremental Stability Analysis chaining type

The Incremental Stability Analysis chaining type chains a standalone buckling solution with a nonlinear one. In the active standalone buckling solution, you select the previous nonlinear solution's converged subcase at which you want to perform the standalone buckling.

Option	Description
Contact Control	Specifies how the contact conditions defined in the nonlinear static solution are handled.Free normal and tangential contact degrees-of-freedom—The status of the contact conditions defined in the nonlinear solution are ignored in the standalone buckling solution. All the contacts degrees of freedom are free.Normal contact d.o.f. depends on contact status in the prerequisite solution—The normal contact status (fixed or free) computed in the nonlinear solution is maintained in the standalone buckling solution.Normal contact and sliding d.o.f. depends on prerequisite solution—The normal and sliding contact status (fixed or free) computed in the nonlinear static solution is maintained in the standalone buckling solution.For more details, see the CONFIX parameter of the .ALGO Samcef command.
The following options apply if either the Normal contact d.o.f. depends on contact status in the prerequisite solution or the Normal contact and sliding d.o.f. depends on prerequisite solution option is selected from the Contact Control list
Precision	Lets you define when a contact degree of freedom is marked as closed. If the reaction of the degree of freedom is greater than the "Precision x the greatest reaction/force on the structure" reference value, the degree of freedom is marked as closed. For more details, see the CONPRE parameter of the .ALGO Samcef command.
***_me.u18 File**	Available when you select External File from the Source Type list.Lets you select the Simcenter Samcef binary nonlinear results file to use as the source for the pre-stress data. For more details, see the IFPR FILE parameters of the .SAM Samcef command.
Subcase Number	Lets you select the subcase number that references the instantaneous configuration. For more details, see the NPR parameter of the .SAM Samcef command.
Chaining with Solution	Available when you select Solution from the Source Type list.Lets you select the nonlinear solution and the subcase (solution step) you want to chain with.

Note:

• When the standalone buckling solution retrieves the instantaneous configuration from the nonlinear selected subcase, it uses the subcase predicted timestep to evaluate the stability matrices at the end of the subcase. If you have selected the latest subcase of the nonlinear solving, you must ensure that time-dependent loads are still defined after the subcase end time. See the Simcenter Samcef documentation for more details on this recommendation.

• For this chaining, you must select the Generate Output for Standalone Buckling Analysis check box. For more information, see Chain a nonlinear analysis with a modal analysis (Simcenter Samcef).

Note:

If the model you chain with contains bolt preloads, you must ensure that these preloads are well taken into account. For more information, see Bolt conditions when chaining solutions (Simcenter Samcef).

Chained thermal-structural analysis chaining type

The Chained thermal-structural analysis chaining type chains a thermal analysis with a standalone buckling one. In the active standalone buckling solution, you select the reference time at which you want to retrieve the nodal temperatures from the thermal solution. These temperatures become thermal loads.

Option	Description
Selected Time	Lets you select the time at which you want to retrieve the thermal results. For more details, see the TIME parameter of the .GEL Samcef command.Note: The real time from which thermal results are retrieved is the thermal computing (and archiving) time which is the nearest to the given Selected Time.
Chaining with Solution	Available when you select Solution from the Source Type list.Lets you select the thermal solution you want to chain with.
***_mt.u18 File**	Available when you select External File from the Source Type list.Lets you select the Simcenter Samcef binary thermal results file to use as the source. For more details, see the IUN FILE parameters of the .SAM Samcef command.

Chained thermal-structural analysis with dissimilar mesh chaining type

The Chained thermal-structural analysis with dissimilar mesh chaining type chains a mapping solution with a standalone buckling one. In the active standalone buckling solution, you select the reference time at which you want to retrieve the nodal temperatures (and the degree of cure and the glass transition temperatures if any) from the thermal solution. These results become thermal loads.

Option	Description
Selected Time	Lets you select the time at which you want to retrieve the thermal results. For more details, see the TIME parameter of the .GEL Samcef command.Note: The real time from which thermal results are retrieved is the thermal computing (and archiving) time which is the nearest to the given Selected Time.
Chaining with Solution	Available when you select Solution from the Source Type list.Lets you select the mapping solution you want to chain with.
***.txt File**	Available when you select External File from the Source Type list.Lets you select the mapping results text file to use as the source.

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Solution dialog box (Simcenter Samcef Standalone Buckling Analysis)

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Chaining with a standalone buckling solution (Simcenter Samcef), Simcenter 3D 2021.1 Series

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