# /ANIM/SHELL/FLDZ

Engine Keyword Generates animation files containing the FLD failure zone factor for the FLD failure model as function of a shell element integration point.

## Format

/ANIM/SHELL/FLDZ/Keyword4

## Definitions

Data Description SI Unit Example
Keyword4 Output location:
MEMB
Middle layer
UPPER
Upper layer
LOWER
Lower layer (number of integration points is equal to one)

1. For a BATOZ shell element, the value is the average value of the Gauss points in the layer
2. The values of FLD zone index are:
FLDZ=6
Failure
${\epsilon }_{major}>{\epsilon }_{\mathrm{lim}}$
FLDZ=5
Marginal
${\epsilon }_{\mathrm{lim}}>{\epsilon }_{major}>{\epsilon }_{m\mathrm{arg}inal}$
FLDZ=4
Safe
${\epsilon }_{m\mathrm{arg}inal}>{\epsilon }_{major}>|{\epsilon }_{minor}|$
FLDZ=3
Compression
$-{\epsilon }_{minor}>{\epsilon }_{major}>-{\epsilon }_{minor}\cdot \frac{{R}_{ani}}{1+{R}_{ani}}$
FLDZ=2
High wrinkle
$-{\epsilon }_{minor}\cdot \frac{{R}_{ani}}{1+{R}_{ani}}>{\epsilon }_{major}$
FLDZ=1
Loose metal
${\epsilon }_{major}{}^{2}+{\epsilon }_{minor}{}^{2}>Factor_Loosemeta{l}^{2}$
Where,
fct_ID
Defined in /FAIL/FLD
${\epsilon }_{\mathrm{lim}}$
Major strain as a limit from FLD diagram from fct_ID in /FAIL/FLD
${\epsilon }_{minor}$ and ${\epsilon }_{major}$
The minimum and maximum principal strains
Rani
Average anisotropy factor defined in FLD input in /FAIL/FLD
$Factor_Marginal$
Defined in FLD input in /FAIL/FLD
$Factor_Loosemetal$
Defined in FLD input in /FAIL/FLD
(1)
$\alpha =\mathrm{arctan}\left(-\frac{{R}_{ani}}{1+{R}_{ani}}\right)$
I_marg
Defined in FLD input in /FAIL/FLD
If I_marg= 2, the marginal curve is defined by shifting the FLD curve with the constant value $Factor_Marginal$ (2)
${\epsilon }_{m\mathrm{arg}inal}={\epsilon }_{\mathrm{lim}}-Factor_Marginal$
If I_marg= 3, the marginal curve is defined as a factor of the $Factor_Marginal$ (3)
${\epsilon }_{m\mathrm{arg}inal}={\epsilon }_{\mathrm{lim}}\left(1-Factor_Marginal\right)$