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Laminate Composites > Solver-specific properties > Nastran solver properties

Properties exported to the Nastran MAT2 bulk data entry

When the PSHELL output format is selected, up to 4 associated MAT2 bulk data entries are written. The fields for each entry are described below, according to the behavior of the bulk data entry. Note that:

  • Fields not mentioned below are always exported as BLANK.

  • Fields may vary for the following non-default PCOMP and PCOMPG options: MEM, BEND, SMEAR, and SMCORE.

Membrane (MIDI)

Field Equation/Description For More Information
G11 Laminate stiffness matrices
G12
G13
G22
G23
G33
RHO Laminate overall density Other properties
A1 - membrane behavior Coefficients of thermal expansion
A2 - membrane behavior
A3 - membrane behavior
TREF Reference temperature, from the laminates modeler properties section

Bending (MID2)

Field Equation/Description For More Information
G11 Laminate stiffness matrices
G12
G13
G22
G23
G33
RHO Laminate overall density Other properties
A1 - membrane behavior Coefficients of thermal expansion
A2 - membrane behavior
A3 - membrane behavior
TREF Reference temperature, from the laminates modeler properties section

Transverse Shear (MID3)

Field Equation/Description For More Information
G11 Laminate stiffness matrices
G12
G13
RHO Laminate overall density Other properties
A1 Exported as 0.0
A2 Exported as 0.0
A3 Exported as 0.0
TREF Reference temperature, from the laminates modeler properties section

Bending-Membrane Coupling (MID4)

Field Equation/Description For More Information
G11 Laminate stiffness matrices
G12
G13
G22
G23
G33
RHO Laminate overall density Other properties
A1 Coefficients of thermal expansion
A2
A3
TREF Reference temperature, from the laminates modeler properties section
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Properties exported to the Nastran MAT2 bulk data entry, Simcenter 3D 2021.1 Series

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Source: https://docs.sw.siemens.com/en-US/doc/289054037/PL20200601120302950.advanced/id626726 · retrieved 2026-07-17