Process Settings Wizard dialog-Warp settings

This page of the Process Settings Wizard, which you can access by clicking (Home tab > Molding Process Setup panel > Process Settings), is used to specify the settings for a Warp analysis.

Note: Not all the items listed may be available on the current dialog, and depend on the analysis technology, molding process, and analysis sequence you have selected.

Warp Settings

Widget	Explanation
Warpage analysis type	Allows you to select the type of Warp analysis to run. Automatic This option is available for Midplane meshed models. Select this option if you want the solver to identify whether the warpage is stable or unstable. Note: When Automatic is selected, a buckling analysis is run first, followed by a large deflection analysis if necessary. Small deflection This analysis is only available on Midplane and 3D meshed models. Select this analysis type if you expect the warpage of the part to be stable. Note: This type of analysis allows you to enable the Isolate cause of warpage option. This option allows the small deflection that you are setting up, to output information about the dominant cause of warpage. Large deflection This analysis is only available on Midplane and 3D meshed models. Select this analysis type if you expect the warpage of the part to be unstable, as determined from a previous automatic or buckling analysis, or the warpage of the part is borderline stable/unstable and/or you want the most accurate prediction of the shape of the part. Note: Optionally, specify the solver parameters settings. Buckling This analysis is only available on Midplane and 3D meshed models. Select this option if you want the solver to identify whether the warpage is stable or unstable. Note: Unless you have some prior expectation or knowledge of the nature of the warpage (stable/unstable), we recommend that you run an Automatic analysis first.
Stress result(s) to output	Specify which laminate-based stress-related results the solver outputs. These results can provide insight into the stresses contained within the part. The following settings are available: None. Principal residual stress. Maximum shear stress. Mises-Hencky stress. All stress results. Note: For large models, the calculation of stress results can require large amounts of CPU time and the results can occupy large amounts of disk space.
Consider gate surface and cold runners?	Specifies whether cold runners and/or gate surface elements, are considered during Warp or Stress analysis. The following settings can be selected: Exclude gate surface and cold runners Select this option if you do not want gate surface or cold runner elements to be considered during Warp or Stress analysis. Select this option if you have not modeled them or if they are immediately removed at ejection. Consider gate surface only Select this option if the runners are removed at ejection but the gate remains attached to the part. The simulation considers the effect of the gate on the stresses or warpage in the part. Consider gate surface and cold runners Select this option if the runners and gate remain attached to the part after ejection and you want the simulation to consider their effect on the stress or warpage in the part. Note: Cold runners and gates are typically removed at ejection and so their effect on part stresses can normally be neglected.
Use mesh aggregation and 2nd-order tetrahedral elements/mesh options	Controls whether 3D Warp analysis should employ mesh aggregation. Mesh aggregation is a technique which assumes that the tetrahedral mesh of your part is only two elements thick. This makes little difference for Warp analysis but produces a result more quickly. Setting this option also makes all tetrahedral elements second-order.
Consider mold thermal expansion	This option requests the warp solver to include mold deformation to calculate the part deformation.
Isolate cause of warpage	Allows outputting the warpage results according to three factors: differential cooling, orientation effect, and differential shrinkage.
Consider corner effects	Select this option if you want the Warp analysis to calculate and account for deformations due to the difference between in-plane shrinkage and thickness shrinkage in shell element formulations for Midplane and Dual Domain models.
Upgrade tetrahedral elements to second order	Specify whether the 4-noded tetrahedral elements (first-order elements) created by the mesher should be upgraded to 10-noded tetrahedral elements (second-order elements) in the 3D Warp analysis. Automatic Allows the warp solver to determine: which elements should not be upgraded, which ones should be upgrated as intermediate (with 5 to 9 nodes), and which ones should be upgrated to 10 noded.
Number of threads for parallelization	Specify the number of threads to be used for parallel solution. The following settings are available: Automatic (Default option) The solver determines the most efficient number of threads to use based on the CPU usage. Automatic parallelization enables the solver to read the CPU usage at each time step and assign an appropriate number of threads to use at that time step of the analysis. Therefore, the number of threads used in the analysis may vary if the machine load (for example: CPU usage) varies during the analysis. This method takes advantage of available processing resources without overloading the machine. However, it may not always result in the fastest analysis due to a small overhead in reading the CPU usage, which may contribute to the overall solution time. Note: The number of threads used is limited to the number of physical processors available for parallelization. Single thread (No parallelization) The analysis does not use the parallel solution method. Maximum The analysis is run using the maximum number of physical processors available for parallelization. This includes multiple cores, but it does not include extra logical processors made available by enabling hyperthreading. Tip: The maximum number of threads used in the calculation is included in the Analysis log. Specify number of threads Enter the desired number of threads to be used for parallelization. If the specified number of threads exceeds the number of physical processors (cores) available, the solver defaults to using the maximum numbers of physical processors available. Tip: The specified number of threads used in the calculation is included in the Analysis Log.
Matrix solver	Select the equation solver to be used in the Warp analysis. AMG solver The Algebraic Multigrid (AMG) matrix solver improves the speed of the analysis by using progressively coarser mesh grids for computations. Note: For parallel analysis, the AMG matrix solver is always used. The option to disable the AMG solver is only available for single-threaded analysis.
Stress analysis type	This option is used to select the type of Stress analysis to run to predict paddle shift/wire sweep.
Include cold runners	By default warpage calculations exclude tetrahedral cold runners.