*MAT_ADD_EROSION

LS-DYNA Input Interface KeywordThis model expresses different failure models which can be added on various material models.

Format

(1) (2) (3) (4) (5) (6) (7) (8)
*MAT_ADD_EROSION
mat_ID EXCL   MNEPS EFFEPS   P_thinfail  
    MXEPS        
If IDAM = 0
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IDAM             fct_IDel
If IDAM > 0
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IDAM DMGTYP LCSDG ECRIT   DCRIT FADEXP fct_IDel
El_ref            
Additional card.
(1) (2) (3) (4) (5) (6) (7) (8)
LCFLD              

Definition

Field Contents SI Unit Example
mat_ID Material identifier.

(Integer)
EXCL Exclusion Number. All parameters with EXCL value are ignored from the failure model.

(Real)
MNEPS Second principal strain for failure.

(Real)
EFFEPS Maximum effective strain failure.
< 0
Effective plastic strain.
> 0
Effective total strain.

(Integer)
P_thinfail Number of thickness integration points that must fail before the element is deleted.
< 0
Percentage of integration point number.
> 0
Number of integration point.

(Real)
MXEPS First principal strain for failure.

(Real)
IDAM Failure model option.
= 0
Default option.
> 0
GISSMO failure model.

(Integer)
DMGTYP GISSMO damage type.
= 1
Damage is accumulated, element failure occurs for 𝐷 = 1.

(Integer)
LCSDG Function or Table identifier defining equivalent plastic.

Strain to failure versus triaxiality and Lode parameter value.

(Integer)
ECRIT Instability strain table identifier.
< 0
Function or table defining instability strain versus triaxiality and Lode parameter value.
> 0
Instability strain.

(Real)
DCRIT Critical accumulated damage value.

(Real)
FADEXP Fading exponent.
< 0
Function or table defining Fading exponent versus element size.
> 0
Fading exponent.

(Real)
fct_IDel Function Identifier for the element size dependent regularization.

Factors at failure.

(Integer)
El_ref Reference element size.

Default = 1.0 (Real)

 [ m ]
LCFLD Function identifier (FLD diagram).

(Integer)

Comments

  1. This keyword maps to /FAIL/TENSSTRAIN, /FAIL/TAB1, /FAIL/JOHNSON, and/or /FAIL/FLD.
  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.