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Release 7.5 MADYMO Coupling Manual

5.3.1 Basic Coupling

• Deﬁne parts using *PART for representing the MADYMO ellipsoids and planes. This has

to be repeated for each ellipsoid and plane in MADYMO.

• Deﬁne shells for parts representing the MADYMO ellipsoids and planes using *SEC-

TION_SHELL.

• Deﬁne rigid body material behavior for parts representing MADYMO ellipsoids and

planes using *MAT_RIGID:

MAT_RIGID

$# MID RO E PR N COUPLE M RE/ALIAS

– RE/ALIAS must match the EXTERNAL_REF number of the MADYMO ellipsoid

or plane in the COUPLING data block (see Sec.

3.1). RE/ALIAS must be unique for

all coupling entities.

– EXTERNAL_DATA is not used by LS-DYNA.

– COUPLE: coupling ﬂag. Set to 2 to generate a mesh in LS-DYNA for MADYMO

ellipsoids and planes and write these in the d3plot output ﬁle.

– M and N are ignored. These parameters are used for compatibility with the MA-

DYMO 5.4.1 coupling.

– Beware of correct unit conversion scales of R

and E values when deﬁning MAT_-

RIGID.

• Deﬁne contacts for the parts representing MADYMO ellipsoids or planes using *CON-

TACT_ENTITY. Some coupling related cards are:

– GEOTYP (card1):

6: Plane

7: Ellipsoid

– SO (card2): Contact stiffness type:

0: Rigid MADYMO ellipsoid or plane

1: Contact stiffness to be taken from E value in *MAT_RIGID

2: User-deﬁned force-penetration curve

– G1 (card5): ID for MADYMO ellipsoid or plane

• Optional: LS-DYNA nodes can be supported on a MADYMO rigid body using *CON-

STRAINED_EXTRA_NODES_NODE. This option can be used to connect an airbag model

or belt anchorage points in LS-DYNA to a steering wheel model in MADYMO, for ex-

ample.

Input Example Basic Coupling

The following is part of a MADYMO input deck for Basic Coupling:

1 2 ... 21 22 23 24 25 26 27 28 29 30 31 ... 62 63

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