Define Curve dialog box (LS-DYNA)

Use the options in this dialog box to define XY curve data for LS-DYNA solutions.

Modeling Object
Name	Specifies the name of the load curve definition.
Label	Specifies a unique numerical identifier for the load curve definition.
Properties****Card 1
Load curve used in (SDIR)	Controls stress initialization by dynamic relaxation.(0) Normal phaseThe software uses the load curve in transient analyses only or in other applications.(1) Dynamic relaxation phaseThe software uses the load curve in stress initialization but not in transient analyses.(2) Dynamic relaxation phaseThe spftware uses the load curve in both stress initialization and in transient analyses.
Scale factor for abscissa value (SFA)	Specifies the scale factor to apply to the abscissa values in the curve.
Scale factor for ordinate value (SFO)	Specifies the scale factor to apply to the ordinate values in the curve.
Offset for abscissa value (OFFA)	Specifies the offset factor to apply to the abscissa values in the curve.
Offset for ordinate value (OFFO)	Specifies the offset factor to apply to the ordinate values in the curve.
Data type (DATTYP)	Specifies the type of data used to define the curve.Specify 0 for general xy data. In these curves, the abscissa values do not increase monotonically.Specify 1 to fime-dependent curves, force versus displacement curves, and stress-strain curves.
Card 2
Load curve A,O pairs	Lets you specify the ordinate and abscissa values.

Additional load curve options

You can define the load curve with a constant value, expression, or field. You can:

• Type a constant value directly in the box.

• Type an expression directly in the box. As you begin to type the expression, tooltips provide hints about valid parameter names. If you type an invalid or incomplete expression, the icon appears next to the box.

• Click and select from these options: Expression opens the Expressions dialog box, where you can select an existing expression or create a new one.For more information about expressions, see Expressions.Select Existing Field opens the Fields dialog box, where you can select a field. A field can define a magnitude that varies with independent variables such as frequency, temperature, or time. For more information about fields, see Fields.New Field→Formula opens the Formula Field dialog box, where you can define a formula to construct a field.For more information, see Define a boundary condition using a formula field.New Field→Table opens the Table Field dialog box, where you can define tabular data to construct a field.For more information, see Define a boundary condition using a table field and Define a material property using a table field.New Field→Link opens the Linked Field dialog box, where you can construct a linked field from an existing spatial field. For more information, see Linked Field dialog box.Plot (XY) plots the field as an XY graph. For more information, see: Graph overview.Overlay(XY) overlays a plot on an existing plot. You can overlay up to 50 plots. For more information, see Overlay plots.

For more information about other options in the list, see Additional magnitude options.

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Defining XY data for LS-DYNA solutions

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Define Curve dialog box (LS-DYNA), Simcenter 3D 2021.1 Series

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