This page of the Process Settings Wizard, which can be accessed by clicking 
(), is used to specify the Warp analysis related process settings for the analysis sequence.
Warp Settings
- 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 the Automatic option is selected, a buckling analysis is run first, followed by a large deflection analysis if necessary.
- Small deflection
- This analysis can be performed on Midplane, Dual Domain 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 if you want the small deflection that you are setting up to output information about the dominant cause of warpage.
- Large deflection
- This analysis can be performed on Midplane, Dual Domain 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 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: 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. - 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.
- Stress result(s) to output
- Specify which laminate-based stress-related results the solver will output.
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. - Stress analysis type
- This option is used to select the type of Stress analysis to run to predict paddle shift/wire sweep.
- Consider gate surface and cold runners?
- Specifies whether cold runners and/or gate surface elements, if present in your model, are taken into consideration 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 taken into consideration during Warp or Stress analysis, either because you have not modeled them or because they will be immediately removed at ejection.
- Consider gate surface only
- Select this option if the runners will be removed at ejection but the gate will remain attached to the part. The simulation will consider 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 will remain attached to the part after ejection and you want the simulation to consider the effect of these 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. - Consider corner effects
- Select this option if you want the Warp analysis to calculate and account for deformations due to mold-restraint induced differential shrinkage.
- Matrix solver
- Select the equation solver to be used in the Warp analysis.
- Consider mold thermal expansion
- Select this check box if you want Warp or Stress analysis to consider the effect of mold thermal expansion on the warpage and/or molded-in stress levels in the part.
- Include cold runners
- By default tetrahedral cold runners are excluded by warpage calculations.
- 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.
To control settings more precisely, turn off this checkbox and click Advanced options.
- GPU options
-
Specifies whether you want numerical calculations to be performed on a GPU (Graphics Processing Unit) card when running a 3D Warp analysis.
Options are:- Automatic
- This option is selected by default. The solver automatically detects and uses the GPU if one is available on the computer and it is able to deliver a speed enhancement compared to using the CPU.
- Use GPU
- Select this option if the computer has a GPU installed and you always want the solver to perform calculations on the GPU.
- Do not use GPU
- Select this option if you do not want the solver to perform calculations on the GPU, even if one is available.
Note: The use of a GPU card on a machine with sufficient memory can result in a significant reduction in analysis time. - 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 (eg: 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 will not use the parallel solution method.
- Maximum
- The analysis will be run using the maximum number of physical processors available for parallelization. This includes multiple cores, but it does not include additional logical processors made available by enabling hyper-threading. 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 will default 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.
- Use AMG matrix solver selection
- Select whether the Algebraic Multigrid (AMG) matrix solver for 3D warp is to be used. Note: For parallel analysis, the AMG matrix solver will always be used. The option to disable the AMG solver is only available for single-threaded analysis.
The AMG solver improves the speed of the analysis by using progressively coarser mesh grids for computations.
The use of a GPU card is coupled with the AMG solver. Choosing to use a GPU card over-rides selecting the Off option, the AMG solver will still be used.