*MAT_003 (PLASTIC_KINEMATIC)

LS-DYNA Input Interface KeywordDefines an isotropic, elasto-plastic material with s Cowper-Symonds strain rate model.

Format

(1) (2) (3) (4) (5) (6) (7) (8)
*MAT_003 or *MAT_PLASTIC_KINEMATIC
mat_ID ρ i E υ SIGY ETAN CHARD
SRC SRP EPS_F  

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 ]
υ Poisson’s ratio.

(Real)

SIGY Yield stress.

(Real)

[ Pa ]
ETAN Plastic slope.

(Real)

[ Pa ]
CHARD Hardening coefficient.

(Real)

SRC Cowper – Symond strain rate dependency coefficient.

(Real)

[ 1 s ]
SRP Cowper – Symond strain rate dependency exponent.

(Real)

EPS_F Failure plastic strain.

(Real)

Comments

  1. This keyword maps to /MAT/LAW44 (COWPER).
  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.