*MAT_105 (DAMAGE_2)

LS-DYNA Input Interface KeywordDefines an elastic viscoplastic material model.

Format

(1) (2) (3) (4) (5) (6) (7) (8)
*MAT_105 or *MAT_DAMAGE_2
mat_ID ρ i E ν MathType@MTEF@5@5@+= feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbwvMCKf MBHbqefqvATv2CG4uz3bIuV1wyUbqedmvETj2BSbqefm0B1jxALjhi ov2DaebbnrfifHhDYfgasaacH8WjY=vipgYlh9vqqj=hEeeu0xXdbb a9frFj0=OqFfea0dXdd9vqai=hGuQ8kuc9pgc9q8qqaq=dir=f0=yq aiVgFr0xfr=xfr=xb9adbaGaaiGadiWaamaaceGaaqaacaqbaaGcba GaeqyVd4gaaa@3A61@ SIGY ETAN FAIL
C P LCSS LCSR  
EPS1 EPS2 EPS3 EPS4 EPS5 EPS6 EPS7 EPS8
ES1 ES2 ES3 ES4 ES5 ES6 ES7 ES8

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 ]
ν MathType@MTEF@5@5@+= feaahqart1ev3aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbwvMCKf MBHbqefqvATv2CG4uz3bIuV1wyUbqedmvETj2BSbqefm0B1jxALjhi ov2DaebbnrfifHhDYfgasaacH8WjY=vipgYlh9vqqj=hEeeu0xXdbb a9frFj0=OqFfea0dXdd9vqai=hGuQ8kuc9pgc9q8qqaq=dir=f0=yq aiVgFr0xfr=xfr=xb9adbaGaaiGadiWaamaaceGaaqaacaqbaaGcba GaeqyVd4gaaa@3A61@ Poisson’s ratio.

Default = 0 (Real)
SIGY Yield stress, ignored if LCSS > 0 or stress-strain values EPS1-EPS8, ES1-ES8 are specified.

(Real)

 [ Pa ]
ETAN Plastic hardening modulus, not used if LCSS > 0.

(Real)

 [ Pa ]
FAIL Plastic strain to failure.

(Real)

 [ 1 s ]
C Strain rate coefficient.

(Real)

  
P Strain rate exponent.

(Real)

  
LCSS Stress versus plastic strain curve or table identifier.

(Integer)

 [ Pa ]
LCSR Curve identifier defining the scaling coefficient for the stress-strain curve for a corresponding strain rate.

(Integer)

  
EPS1-EPS8 Plastic strain data points.

(Real)
ES1-ES8 Yield stress data points.

(Real)

 [ Pa ]

Comments

  1. This keyword maps to /MAT/LAW36 (PLAS_TAB) when stress-strain curves are specified using LCSS or EPS and ES. If SIGY, ETAN, C, and P are used, 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 characters long line is added after the keyword input line which allows an entity title to be defined.