Creation of mesh collectors during import (Simcenter Samcef)

When you import a Simcenter Samcef model, the following Samcef data is combined to create mesh collectors, which contain physical properties and meshes:

• Element topology (.MAI N)

• Element type (.HYP and .MCE N)

• Element attribute (.MAI ATT)Note: You can decide if the element attribute acts or not as a filter when creating the mesh collector.For more information on that option, see File Import dialog box (Simcenter Samcef).

• Material (.MAT)

• Beam section profile (.BPR or .CHB)

• Composite or non-composite elementFor these elements, the following criteria also apply:Composites elements with the same sequence of ply IDs and/or angles valuesFor more details, see Importing laminates (Simcenter Samcef).Composite damping (.AMO ALPHA)Homogenization flag (.AEL HOMO)The non local thermodynamic forces flag (.AEL NLOC)

• Non-linear flag (.AEL NLIS)

• Interstage number (.AEL STAGE)

• Incompressibility condition (.AEL BULK)

• Thermal capacity term activation (.AEL THB) (fluid element)

• Shell thickness (.PHP THICK)

• Shell/beam offset (.AEL EXCE, .AEL NEXC, .AEL PEXC)

• Non-structural mass (.PHP SMAS/LMAS)

• Fluid element cross-sectional surface (.PHP SEC)

• Fluid element wetted perimeter (.PHP PRM)

Examples

Here are some examples that illustrate the mesh collector creation process.

Simcenter Samcef data	Generated mesh collectors, meshes, and physical properties
Two Mindlin quadrangular shells that share one material and one thickness	One shell property, one mesh, and one mesh collector
Two Mindlin quadrangular shells with different Samcef attributes, but one material and one thickness	Two shell properties, two meshes, and two mesh collectors
One Mindlin quadrangular shell, one Mindlin triangular shell, and one material	One shell property, one mesh, and one mesh collectorNote: The triangle is the degenerated form of a quadrangle, so they are grouped in the same mesh.
One Mindlin quadrangular shell, one rod, and one material	Two physical properties, two meshes, and two mesh collectors (one for the rod, one for the shell)
One Mindlin shell, one volume, and one material	Two physical properties, two meshes, and two mesh collectors
Two Mindlin quadrangular shells, two materials, and one thickness	Two physical properties, two meshes, and two mesh collectors
Two Mindlin quadrangular shells, one single material, one thickness, and two different shells offsets	Two physical properties, two meshes, and two mesh collectors
Linear hexahedral elements connected to parabolic tetrahedral elements with hybrid (transition) elements.	Two physical properties, three meshes, and three mesh collectors (includes one mesh collector for the transition elements)

Element degeneration during import of meshes

In Simcenter Samcef, degenerated elements are of two types:

• Degeneration from redundant numbering in the element definition. In this case, the element is automatically degenerated to its corresponding transition element.For instance, the import automatically replaces a quadrangle defined as .MAI I 1 N 1 2 3 3 by its transition triangle .MAI I 1 N 1 2 3.

• Degeneration from coincident nodes. In this case, the element is not degenerated to its transition element and therefore is imported with no change.For instance, the import of a quadrangle defined as .MAI I 1 N 1 2 3 4, where node 2 and node 3 are coincident, is not converted to a triangle.

For more details on the Simcenter Samcef element degeneration, see the Simcenter Samcef solver documentation.

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File Import dialog box (Simcenter Samcef)

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Creation of mesh collectors during import (Simcenter Samcef), Simcenter 3D 2021.1 Series

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