LS-DYNA Input Interface KeywordDefines 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 /MAT/LAW108 (SPR_GENE).
  2. 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.