Nastran to LS-DYNA Conversion Mapping

Element

Table 1. Supported Element Mappings
Nastran LS-DYNA
CONM2 *ELEMENT_MASS or *ELEMENT_INERTA
CWELD Meshless weld

(feabsorb, fe realize using HEXA)

CDAMP1/CDAMP2

(0 length)

*ELEMENT_DISCRETE

(card edit for ground option check box)

PLOTEL *ELEMENT_PLOTEL
RBAR/RBE2/RJOINT *CONSTRAINED_NODAL_RIGID_BODY
RBE3 *CONSTRAINED_INTERPOLATION
CBAR/CBEAM/CROD/CTUBE/CBUSH

CELAS1/CELAS2

*ELEMENT_BEAM
CTRIA3/CTRIAR

CQUAD4, CQUADR, CSHEAR

CQUAD8, CTRIA6

(Change to 1st order then convert)

*ELEMENT_SHELL
CTETRA4/CHEXA8/CPENTA6

CTETRA10/CHEXA20/CPENTA15

(Change to 1st order then convert)

*ELEMENT_SOLID

Properties

Table 2. Supported Property Mappings
Nastran LS-DYNA
PBAR/PBEAM/PROD

(Only single section PBEAM is supported)

*SECTION_BEAM
PBARL/PBEAML/PRODL

(ROD, TUBE, BAR)

*SECTION_BEAM
PBUSH *SECTION_BEAM + *MAT_GENERAL_SPRING_DISCRETE_BEAM
PELAS *SECTION_BEAM + *MAT_1DOF_GENERALIZED_SPRING
PDAMP *SECTION_DESCRETE
PSHELL/PSHEAR *SECTION_SHELL
PSOLID *SECTION_SOLID
PCOMP PCOMPG *PART_COMPOSITE +*ELEMENT_SHELL with angle option; all materials referred in PCOMP, PCOMPG converted to *MAT_ORTHOTROPIC_THERMAL

Materials

Table 3. Supported Material Mappings
Nastran LS-DYNA
MAT1 *MAT_ELASTIC
MAT2 *MAT_PIECEWISE_LINEAR _PLASTICITY
MAT4 *MAT_PIECEWISE_LINEAR _PLASTICITY
MAT8 *MAT_ORTHOTROPIC_ELASTIC
MAT9 *MAT_ANISOTROPIC_ELASTIC

Coordinate Systems

Table 4. Supported Coordinate System Mappings
Nastran LS-DYNA
CORD1R *DEFINE_COORDINATE_NODE
CORD2R *DEFINE_COORDINATE_SYSTEM

Loads

Table 5. Supported Load Mappings
Nastran LS-DYNA
SPC *BOUNDARY_SPC
FORCE *LOAD_NODE_POINT
MOMENT *LOAD_NODE_POINT
PLOAD4 *LOAD_SEGMENT
TEMP *INITIAL_TEMP