LS-DYNA Input Interface KeywordThis keyword defines an elasto-plastic spring material.


(1) (2) (3) (4) (5) (6) (7) (8)
mat_ID K KT FY


Field Contents SI Unit Example
mat_ID Material identifier

(Integer, maximum 10 digits)

K Linear Stiffness


[ N m ]
KT Harderning Stiffness


[ N m ]
FY Yield force or moment


[ N ] or [ Nm ]


  1. This keyword maps to /PROP/TYPE8 (SPR_GENE) spring using a default mass 2.0e-03 kg and inertia 2e-02 kg*mm depending on the units.
  2. The option “_TITLE” can be added to the end of this keyword. When “_TITLE” is included, an extra 80 character long line is added after the keyword input line which allows an entity title to be defined.