*MAT_ADD_EROSION
LS-DYNA Input Interface KeywordDefines a cumulative failure model.
Format
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) |
---|---|---|---|---|---|---|---|
*MAT_ADD_EROSION | |||||||
mat_ID | Pmax | Eps_min | Eps_eff | Eps_vol | P_thick_fail | NCS | |
Pmin | SigP1_max | Sig_max | Eps_max | Shear | Sigr | K | Time_max |
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) |
---|---|---|---|---|---|---|---|
IDAM | fct_IDel |
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) |
---|---|---|---|---|---|---|---|
IDAM | EPSF_ID | INST_ID | N | D_crit | EXP | fct_IDel | |
EL_REF | FCT_SR | SHRF | BIAXF |
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) |
---|---|---|---|---|---|---|---|
IDAM | fct_IDel | ||||||
INITYP | TAB_ID | PARAM2 | PARAM3 | ||||
EVOTYP | COMPTYP | DISP |
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) |
---|---|---|---|---|---|---|---|
Tab_ID_FLD | Nstep | Thinning | fct_IDg12 | fct_IDg13 | fct_IDe1c | ||
Volfrac | Tmax | Dtmin |
Definition
Field | Contents | SI Unit Example |
---|---|---|
mat_ID | Material
identifier. (Integer) |
|
Pmax | Maximum
pressure. (Real) |
|
Eps_min | Minimum principal
strain. (Real) |
|
Eps_eff | Maximum effective
strain. (Real) |
|
Eps_vol | Maximum volumetric
strain. (Real) |
|
P_thick_fail | Number of integration points to
element failure. (Real) |
|
NCS | Number of failure criteria to
element failure. (Real) |
|
Pmin | Minimum
pressure. (Real) |
|
SigP1_max | Maximum principal
stress. (Real) |
|
Sig_max | Maximum equivalent
stress. (Real) |
|
Eps_max | Maximum principal
strain. (Real) |
|
Shear | Maximum Tensorial shear
strain. (Real) |
|
Sigr | Initial fracture stress for
Tuler-Butcher criterion. (Real) |
|
K | Critical value of the damage
integral for Tuler-Butcher criterion. (Real) |
|
Time_max | Failure time. (Real) |
|
IDAM | Additional failure model flag.
(Integer) |
|
EPSF_ID | Plastic strain at failure table
identifier (used only if IDAM >
0). (Real) |
|
INST_ID | Instability (necking) plastic
strain table identifier (used only if IDAM >
0). (Real) |
|
N | Damage accumulation exponent (used
only if IDAM > 0). (Real) |
|
D_crit | Critical damage for stress
softening triggering (used only if IDAM >
0). (Real) |
|
EXP | Scale factor for stress softening
exponent function (used only if IDAM >
0). (Real) |
|
fct_IDel | Element size scale factor function
identifier. (Integer) |
|
EL_REF | Reference element size for size
scaling table. (Real) |
|
FCT_SR | Strain rate dependency function
identifier. (Real) |
|
SHRF | Lower stress triaxiality boundary
for element size scaling. (Real) |
|
BIAXF | Upper stress triaxiality boundary
for element size scaling. (Real) |
|
INITYP | Damage initiation criterion
type. (Real) |
|
TAB_ID | Failure initiation criterion table
identifier. (Real) |
|
PARAM2 | Damage initiation
parameter. (Real) |
|
PARAM3 | Damage initiation
parameter. (Real) |
|
EVOTYP | Damage evolution type.
(Real) |
|
COMPTYP | Criterion combination
type. (Real) |
|
DISP | Damage evolution parameter.
(Real) |
|
Tab_ID_FLD | Table or function identifier of the
Forming Limit Diagram. (Integer) |
|
Nstep | Number of cycles for the stress
reduction for stress reduction. (Real) |
|
Thinning | Thinning failure
value. (Real) |
|
fct_IDg12 | Function identifier of the maximum
in-plane shear strain
versus element
size. (Integer) |
|
fct_IDg13 | Function identifier of the maximum
transversal shear strain
versus element
size. (Integer) |
|
fct_IDe1c | Function identifier of the maximum
in-plane major strain
versus element
size. (Integer) |
|
Volfrac | Volume fraction of the solid
element to reach before the element is
deleted. (Real) |
|
Tmax | Maximum
temperature. (Real) |
|
Dtmin | Minimum time
step. (Real) |
Comments
- This keyword maps to /FAIL/GENE1, /FAIL/INIEVO, and/or /FAIL/TAB2.
- 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.