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