/PROP/TYPE16 (SH_FABR)
Block Format Keyword This property set is used to define the anisotropic layered shell property set. This property is currently only compatible with Elastic Anisotropic Fabric (/MAT/LAW58 (FABR_A)).
Format
(1)  (2)  (3)  (4)  (5)  (6)  (7)  (8)  (9)  (10) 

/PROP/TYPE16/prop_ID/unit_ID or /PROP/SH_FABR/prop_ID/unit_ID  
prop_title  
I_{shell}  I_{smstr}  I_{sh3n}  P_thick_{fail}  
h_{m}  h_{f}  h_{r}  d_{m}  
N  I_{strain}  Thick  A_{shear}  I_{thick}  
V_{X}  V_{Y}  V_{Z}  Skew_ID  I_{pos}  
${\varphi}_{\text{\hspace{0.17em}}i}$  ${\alpha}_{1}$  t_{i}  Z_{i}  mat_ID_{i} 
(1)  (2)  (3)  (4)  (5)  (6)  (7)  (8)  (9)  (10) 

${\varphi}_{\text{\hspace{0.17em}}i}$  ${\alpha}_{1}$  t_{i}  Z_{i}  mat_ID_{i} 
Definitions
Field  Contents  SI Unit Example 

prop_ID  Property
identifier (Integer, maximum 10 digits) 

unit_ID  Unit Identifier (Integer, maximum 10 digits) 

prop_title  Property
title (Character, maximum 100 characters) 

I_{shell}  Shell element formulation flag.
(Integer) 

I_{smstr}  Shell small strain
formulation flag.
(Integer) 

I_{sh3n}  3 node shell element
formulation flag.
(Integer) 

P_thick_{fail}  Element suppression
criterion. It is ratio of the sum of failed integration points
thickness over total shell thickness necessary to delete the
element. 7 This option used for /FAIL/FABRIC. $0.0\le P\_thic{k}_{fail}\le 1.0$ (Real) 

h_{m}  Shell membrane hourglass
coefficient. Only used when I_{shell}=1, 2, 3, 4. Default = 0.01 Default = 0.1 for I_{shell} =3 (Real) 

h_{f}  Shell outofplane
hourglass. Only used when I_{shell}=1, 2, 3, 4. Default = 0.01 (Real) 

h_{r}  Shell rotation hourglass
coefficient. Only used when I_{shell}=1, 2, 3, 4. Default = 0.01 Default = 0.1 for I_{shell} =3 (Real) 

d_{m}  Shell membrane
damping. It is used for Material LAW58. Default =0.075 for I_{shell} ≠12 Default =0.2 for I_{shell} =12 Default = 0.0 for all 3 node shells (Real) 

N  Number of layers, with
$1\le N\le 100$
. 6
Default = 1 (Integer) 

I_{strain}  Compute strains for
postprocessing flag.
(Integer) 

Thick  Shell
thickness. (Real) 
$\left[\text{m}\right]$ 
A_{shear}  Shear factor Default is Reissner value: 5/6 (Real) 

I_{thick}  Shell resultant stresses
calculation flag.
(Integer) 

V_{X}  X component for reference
vector. 3 Default = 1.0 (Real) 

V_{Y}  Y component for reference
vector. Default = 0.0 (Real) 

V_{Z}  Z component for reference
vector. Default = 0.0 (Real) 

Skew_ID  Skew identifier for
reference vector. 3 If the local skew is defined, its Xaxis replaces the global vector V. V_{X}, V_{Y}, and V_{Z} coordinates are ignored. Default = 0 (Integer) 

I_{pos}  Layer positioning flag for
reference vector. 4
Default = 0 (Integer) 

${\varphi}_{\text{\hspace{0.17em}}i}$  Angle
${\varphi}_{\text{\hspace{0.17em}}i}$
of 1st local axis for layer
i. 3 (Real) 
$\left[\mathrm{deg}\right]$ 
${\alpha}_{1}$  Angle between first and
second axis. 3 Default = 90.0 (Real) 
$\left[\mathrm{deg}\right]$ 
t_{i}  Thickness
t_{i} of layer
i. (Real) 
$\left[\text{m}\right]$ 
Z_{i}  Z position of layer i
(Z_{i} defines the
position of the middle of the layer). Default = 0.0 (Real) 
$\left[\text{m}\right]$ 
mat_ID_{i}  Material identifier for
layer i. Same material should be used for all
layers. (Integer) 
Example
#RADIOSS STARTER
#12345678910
# 1. LOCAL_UNIT_SYSTEM:
#12345678910
/UNIT/2
unit for PROP
# MUNIT LUNIT TUNIT
Mg mm s
#12345678910
# 2. GEOMETRICAL SETS:
#12345678910
/PROP/TYPE16/2/2
prop type 16
# Ishell Ismstr Ish3n
0 0 0
# hm hf hr dm
0 0 0 0
# N Istrain Thick Ashear Ithick
3 0 1.6 0 0
# Vx Vy Vz skew_ID Ipos
1 0 1 0 0
# Phi Alpha Ti Zi mat_IDi
45 90 .5 1
90 90 .6 2
45 90 .5 1
#12345678910
#enddata
#12345678910
Comments
 I_{shell} – 4node shell
formulation flag
The hourglass formulation is viscoelastic for Q4 shells (I_{shell}=1,2,3,4).
 h_{m}, h_{f}, and h_{r}  Hourglass coefficients
 h_{m}, h_{f}, and h_{r} are used only for Q4 shells (I_{shell}=4). They must have a value between 0 and 0.05.
 For I_{shell}=3, default values of h_{m} and h_{r} are 0.1 with larger values possible.
 Anisotropy in local
coordinate system Two different ways to define the anisotropy with this property
 Skew_ID=0
 Anisotropic direction defined with global vector V (components defined in Line 6) and angle ${\varphi}_{i}$ (angle in degree) for each layer.
 Skew_ID≠0
 Anisotropic direction defined with skew (Xaxis in skew replaces the global vector $V$ ) and angle ${\varphi}_{i}$ (angle in degree) for each layer.
For both ways (with vector $V$ or with skew), Projection of vector $V$ (or xaxis of skew) on shell element plane becomes the vector ${V}^{\prime}$ . Then for each layer, the anisotropic direction.
(direction 1) is vector ${V}^{\prime}$ turned ${\varphi}_{i}$ degrees, where the positive direction is based on the shell normal $n$ . ${\alpha}_{\text{\hspace{0.17em}}i}$ is the angle between local anisotropic direction 1 and 2 (directions of anisotropy) for layer i. If ${\alpha}_{\text{\hspace{0.17em}}i}={90}^{\circ}$ , then layer is in orthotropic.
 In case of reference metrics, the orientation for directions of anisotropy must be defined with the reference geometry, not the initial one.
 I_{pos} – Layer position
I_{pos}= 0: layer positions are calculated automatically.
If(1) $$Thick\ne {\displaystyle \sum _{i}^{N}{t}_{i}}$$ A warning message is displayed
 Individual layer thickness will be adjusted to new layer thickness
${t}_{i}^{new}$
with:
(2) $$Thick={\displaystyle \sum _{i}^{N}{t}_{i}^{new}}$$Here "Thick" and ${t}_{i}$ are the shell thickness and layer thickness which specified in input.  I_{pos} = 1: all
layer positions in the element thickness are user defined (with
${t}_{i}$
and
${Z}_{i}$
).
 “Thick” is not checked, as it does not need to be equal to the sum of layer thickness.
 Multiple layers are allowed to have the same space position.
For more details, refer to Layer thickness and position calculation in FAQs.
 The material law number given in /PART will be used to define the density and Young’s Modulus which then is used to calculate the time step and interface stiffness.
 Each i layer has only 1 integration point through its thickness.
 Option P_thick_{fail} is used by /FAIL/FABRIC criterion. This is the only criterion which is compatible with /PROP/TYPE16 and /MAT/LAW58.