Edge-to-Edge Contact dialog box (Simcenter Nastran/Multiphysics)

Edge Pair Creation Method	Specifies the edge pair creation method.Select Automatic Edge Pairing to create face pairs automatically using the Create Automatic Edge Pairs dialog box. See Automatic face pairing and Create Automatic Face Pairs dialog box for more information.Select Manual Edge to Edge Contact to create face pairs manually by selecting regions that define the contacting and contacted edges.
Destination Folder
Simulation Object Container	Specifies the folder in the Simulation Navigator in which the boundary condition will be stored. The list includes the root container and existing folders that you created using the New Folder command. Examples of a root container include Load Container, Constraint Container, and Simulation Object Container.
Folder Manager	Displays a hierarchical list of existing folders. To create a new folder, right-click any level of the hierarchy and choose New Folder.
Automatic Edge Pair Creation
Create Edge Pairs	Available when the edge pair creation method is set to Automatic Edge Pairing.Opens the Create Automatic Edge Pairs dialog box where you can use existing edge separation conditions to generate pairs of contacting edges.
Source Region
Source Region	Available when the edge pair creation method is set to Manual Edge to Edge Contact.Lets you specify the region that defines the contacting edge. Select an existing edge region, or click Create Region to create a new edge region.For more information, see Working with reusable regions.
Target Region
Source Region	Available when the edge pair creation method is set to Manual Edge to Edge Contact.Lets you specify the region that defines the contacted edge. Select an existing region, or click Create Region to create an edge new region.For more information, see Working with reusable regions.
Swap Regions
Swap Regions	Available when the edge pair creation method is set to Manual Edge to Edge Contact.Reverses the source and target regions.
Contact Set Properties (BCTSET)
Coefficient of Static Friction	Defines the static coefficient of friction for the contact pair. This option corresponds to the FRICi field on the BCTSET bulk entry. When contact is detected, Nastran uses this value to calculate any tangential contact forces by multiplying the normal contact force by the specified Coefficient of Static Friction.
Min Search Distance	Defines the minimum search distance for contact. This option corresponds to the MINDi field on the BCTSET bulk entry.Note: SOL 402, SOL 601, and SOL 701 ignore the minimum search distance.
Max Search Distance	Defines the maximum search distance for contact. This option corresponds to the MAXDi field on the BCTSET bulk entry.Note: SOL 402, SOL 601, and SOL 701 ignore the maximum search distance.
Local Contact Pair Parameters
Linear and Multi-Step Nonlinear (BCTPARM)	In a Simcenter Nastran linear or nonlinear analysis (SOL 101, SOL 103, SOL 111, SOL 112, and SOL 401), lets you assign a Contact Parameters – Local Pair Overrides object to the contact definition. This allows you to selectively change the values of certain parameters on a contact pair-by-contact pair basis.If you select None from the list, the software uses the Contact Parameters – Global Pair you assigned in the Solution dialog box to set the contact parameters (BCTPARM) values for the solution.
Advanced Nonlinear (BCTPARA)	In a Simcenter Nastran advanced nonlinear analysis (SOL 601,106, SOL 601,129, or SOL 701), lets you assign a Contact Parameters – Advanced Nonlinear Pair modeling object to the contact definition. The Contact Parameters – Advanced Nonlinear Pair modeling object lets you control contact parameters such as the contact algorithm used by Simcenter Nastran. The parameters correspond to the options in the BCTPARA bulk entry.
Multi-Step Nonlinear Kinematics (BCTPAR2)	In a Simcenter Nastran multi-step nonlinear analysis (SOL 402), lets you assign a Contact Parameters – Multi-Step Nonlinear Kinematics Pair modeling object to the contact definition. The Contact Parameters – Multi-Step Nonlinear Kinematics Pair modeling object lets you control contact parameters such as the contact algorithm used by Simcenter Nastran. The parameters correspond to the options in the BCTPAR2 bulk entry.
Local Overrides (BCTPARM)	Appears for Simcenter 3D Multiphysics solutions of type Coupled and Thermal only.Lets you assign a Contact Parameters – Local Pair Overrides object to the contact definition. This allows you to selectively change the values of certain parameters for each contact pair.If you select None from the list, the software uses the Global Contact Parameters you assigned in the Create Solution dialog box to set the contact parameters (BCTPARM) values for the solution.
Thermal Properties
Activate Thermal Coupling	Available for Coupled and Thermal analysis types only.Transfers heat through the contact pairs.
Type	Specifies the type of thermal coupling.Perfect ContactTransfers heat with no thermal resistance.Heat Transfer CoefficientLets you define the heat transfer coefficient for the contact pair.Edge ContactLets you define the conductance per length of the edge.Thermo-Mechanical ContactUses one heat transfer coefficient when there is a gap between the contact pair, and a separate heat transfer coefficient when the contact pair has no gap.
Coefficient	Appears when Type is set to Heat Transfer Coefficient.Sets the heat transfer coefficient value as a constant value or a value dependent on time, temperature, heat flow rate, temperature difference, or thermal capacitance. Specify power/(length2 x temperature) units.ExpressionSets a constant value for the coefficient.FieldLets you specify a coefficient field or scale factor.Specify FieldLets you select or create a coefficient field that varies with time, temperature, heat flow rate, temperature difference, or thermal capacitance.Scale FactorSets a multiplying factor to uniformly increase or decrease the coefficient.
Conductance per Length	Appears when Type is set to Edge Contact.Sets the conductance per length value as a constant value or a value dependent on time, temperature, heat flow rate, temperature difference, or thermal capacitance. Specify power/(length x temperature) units.ExpressionSets a constant value for the conductance per length. FieldLets you specify a coefficient field or scale factor.Specify FieldLets you select or create a coefficient field that varies with time, temperature, heat flow rate, temperature difference, or thermal capacitance.Scale FactorSets a multiplying factor to uniformly increase or decrease the coefficient.
Coefficient with Gap	Appears when Type is set to Thermo-Mechanical Contact.Defines the heat transfer coefficient when there is a gap between the source and target regions.
Coefficient with Contact	Appears when Type is set to Thermo-Mechanical Contact.Defines the heat transfer coefficient when there is no gap between the source and target regions.
Additional Thermal Parameters
Coupling Resolution	Controls the accuracy of the coupling. The software subdivides primary elements according to the Coupling Resolution before it determines conductances. With the One to One resolution, the solver calculates a single conductance from each primary element to the nearest secondary element.With the Coarse through Finest resolutions, the software subdivides each primary element into a progressively larger number of sub-elements.Note: The finer subdivision level may not always produce more accurate results.
Only Connect Overlapping Elements	Controls how the software establishes the conductances between the selected elements.
Overlap Projection Direction	Available when the Only Connect Overlapping Elements check box is selected.Controls whether the normal of the primary or secondary elements is used to calculate the area of overlap.
Temperature Dependence Uses	Appears when Type is set to Heat Transfer Coefficient or Edge Contact.Specifies which temperature is used to evaluate the magnitude when temperature-varying function is used. You can define a temperature dependency in table fields, formula fields, 4D fields, and table of fields.Average TemperatureUses the average temperature of primary and secondary regions to evaluate the magnitude.Primary TemperatureUses the temperature of the primary region to evaluate the magnitude.For more information, see Temperature dependency for thermal and electrical couplings.

These options are available when you click More Options .
Find	Lets you search for an object by entering the full name of the object. For example, to find a group named ABC_group, you must type ABC_group into the search box.After typing the name, press Enter or click Find . If the object is found, it will be selected automatically.
Filter by Name	Lets you filter the list by the names of the objects. This filter supports wildcards. The default wildcard of * displays all entries in the list. For example, to filter the list to display every object with a name starting with the letter "a," enter a* as the filter string.
Find	Starts the find or filter operation.

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Edge-to-Edge Contact dialog box (Simcenter Nastran/Multiphysics), Simcenter 3D 2021.1 Series

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