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FAQ 004484 | How can I display the stresses of a surface via RF‑COM?
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How can I display the stresses of a surface via RF‑COM?Answer
The stresses of a surface can be displayed via the COM interface. First, you need the interface for the model (IModel) and then the interface for the calculation (ICalculation2). Using this interface, you can get the interface for the results (IResults2):
Sub stresses_surfaces_example()Dim iApp As RFEM5.ApplicationDim iModel As RFEM5.modelSet iModel = GetObject(, "RFEM5.Model")
On Error GoTo E
If Not iModel Is Nothing Then ' get interface from model Set iApp = iModel.GetApplication iApp.LockLicense ' get interface from calculation Dim iCalc As RFEM5.ICalculation2 Set iCalc = iModel.GetCalculation ' get interface from results from loadcase 1 Dim iRes As RFEM5.IResults2 Set iRes = iCalc.GetResultsInFeNodes(LoadCaseType, 1) ' get equivalent stresses Dim str_equ() As RFEM5.SurfaceEquivalentStresses str_equ = iRes.GetSurfaceEquivalentStresses(1, AtNo, VonMisesHypothesis) End If
E:If Err.Number <> 0 Then MsgBox Err.Number & " " & Err.descriptionEnd If
If Not iApp Is Nothing Then iApp.UnlockLicenseEnd IfThe GetSurfaceEquivalentStresses function requires the specification of the calculation hypothesis. In this case, the results of the von Mises stress are displayed. Please note that the COM interface uses SI units so the stress is transferred in N/m².
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Dlubal FAQ COM Mises Stresses IResults ICalculation Frequently Asked Question FAQ about Dlubal Question and Answer about Dlubal
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Cross-Model Updating and Adjusting Structural Data Using COM Interface
For some structures, it is necessary to design them in different configurations.
New
Increased Calculation Performance by Reducing the Nodal Degrees of Freedom
The number of degrees of freedom in a node is no longer a global calculation parameter in RFEM (6 degrees of freedom for each mesh node in 3D models, 7 degrees of freedom for the warping torsion analysis). Thus, each node is generally considered with a different number of degrees of freedom, which leads to a variable number of equations in the calculation.
This modification speeds up the calculation, especially for models where a significant reduction of the system could be achieved (e.g. trusses and membrane structures).
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