cPropMaterialSetSSCurve Method

Sets the material stress-strain curve for materials that are specified to have user-defined stress-strain curves.

Namespace:  ETABS2016
Assembly:  ETABS2016 (in ETABS2016.dll) Version: 16.0.0.0 (16.0.0.0)
Syntax
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int SetSSCurve(
	string Name,
	int NumberPoints,
	ref int[] PointID,
	ref double[] Strain,
	ref double[] Stress,
	double Temp = 0
)

Parameters

Name
Type: SystemString
The name of an existing material property.
NumberPoints
Type: SystemInt32
The number of points in the stress-strain curve. This item must be at least 3.
PointID
Type: SystemInt32
This is one of the following integers which sets the point ID. The point ID controls the color that will be displayed for hinges in a deformed shape plot.
ValuePoint ID
-5-E
-4-D
-3-C
-2-B
-1-A
0None
1A
2B
3C
4D
5E

The point IDs must be input in numerically increasing order, except that 0 (None) values are allowed anywhere. No duplicate values are allowed excepth for 0 (None).

Strain
Type: SystemDouble
This is an array that includes the strain at each point on the stress strain curve. The strains must increase monotonically.
Stress
Type: SystemDouble
This is an array that includes the stress at each point on the stress strain curve. [F/L2]

Points that have a negative strain must have a zero or negative stress. Similarly, points that have a positive strain must have a zero or positive stress.

There must be one point defined that has zero strain and zero stress.

Temp (Optional)
Type: SystemDouble
The temperature at which the specified data applies. The temperature must have been defined previously for the material.

This item applies only if the specified material has properties that are temperature dependent. That is, it applies only if properties are specified for the material at more than one temperature.

Return Value

Type: Int32
Returns zero if the data is successfully assigned; otherwise it returns a nonzero value.
Remarks
Examples
VB
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Public Sub Example()
       Dim SapModel As cSapModel
       Dim EtabsObject As cOAPI
       Dim ret As Integer = -1
       Dim PointID() As Integer
       Dim Strain() As Double
       Dim Stress() As Double

   'create ETABS object
       EtabsObject = CreateObject("CSI.ETABS.API.ETABSObject")

   'start ETABS application
       ret = EtabsObject.ApplicationStart()

   'create SapModel object
       SapModel = EtabsObject.SapModel

   'initialize model
       ret = SapModel.InitializeNewModel()

   'create steel deck template model
       ret = SapModel.File.NewSteelDeck(4,12,12,4,4,24,24)

   'initialize new material property
       ret = SapModel.PropMaterial.SetMaterial("Steel", eMatType.Steel)

   'assign other properties
       ret = SapModel.PropMaterial.SetOSteel("Steel", 55, 68, 60, 70, 0, 1, 0, 0, 0)

   'assign user SS curve
       ReDim PointID(4)
       ReDim Strain(4)
       ReDim Stress(4)
       Strain(0) = -0.003:  Stress(0) = -50:  PointID(0) = -3
       Strain(1) = -0.001:  Stress(1) = -25:  PointID(1) = 0
       Strain(2) = 0:       Stress(2) = -0:   PointID(2) = 1
       Strain(3) = 0.003:   Stress(3) = 40:   PointID(3) = 0
       Strain(4) = 0.008:   Stress(4) = 80:   PointID(4) = 5
       ret = SapModel.PropMaterial.SetSSCurve("Steel", 5, PointID, Strain, Stress)

   'close ETABS
       EtabsObject.ApplicationExit(False)

   'clean up variables
       SapModel = Nothing
       EtabsObject = Nothing
   End Sub
See Also