*MAT_100 (SPOTWELD)

LS-DYNA Input Interface KeywordDefines an elasto-plastic spotweld material for beam element (elform=9) or solid element.

Format

(1) (2) (3) (4) (5) (6) (7) (8)
*MAT_100 or *MAT_SPOTWELD
mat_ID ρ i E ν SIGY ET    
EFAIL NRR NRS NRT MRR MSS MTT  

Definition

Field Contents SI Unit Example
mat_ID Material identifier.

(Integer)

ρ i Initial density.

(Real)

[ kg m 3 ]
E Young’s modulus.

(Real)

[ Pa ]
v Poisson’s ratio.

(Real)

SIGY Yield stress.

(Real)

[ Pa ]
ET Plastic hardening modulus.

(Real)

[ Pa ]
EFAIL Plastic strain to failure.

(Real)

NRR Axial failure force (for beam only, only ≥ 0). EFAIL is ignored.

(Real)

[ N ]
NRS Shear failure force in local direction S (for beam only, only ≥ 0). EFAIL is ignored.

(Real)

[ N ]
NRT Shear failure force in local direction T (for beam only, only ≥ 0). EFAIL is ignored.

(Real)

[ N ]
MRR Torsional failure moment (for beam only, only ≥ 0).

(Real)

[ Nm ]
MSS Bending failure moment along local direction S (for beam only, only ≥ 0).

(Real)

[ Nm ]
MTT Bending failure moment along local direction T (for beam only, only ≥ 0).

(Real)

[ Nm ]

Comments

  1. This keyword maps to /PROP/TYPE43 (CONNECT), /MAT/LAW59 (CONNECT) and /FAIL/CONNECT.
  2. This keyword linked to beam elements maps to /PROP/TYPE13 (SPR_BEAM).
  3. The option “_TITLE” can be added to the end of this keyword. When “_TITLE” is included, an extra 80 characters long line is added after the keyword input line which allows an entity title to be defined.