/PROP/TYPE10 (SH_COMP)
Block Format Keyword This property set is used to define the composite shell property set. It is possible to define composite with several layers and each layer with individual orthotropic direction.
Format
(1)  (2)  (3)  (4)  (5)  (6)  (7)  (8)  (9)  (10) 

/PROP/TYPE10/prop_ID/unit_ID or /PROP/SH_COMP/prop_ID/unit_ID  
prop_title  
I_{shell}  I_{smstr}  I_{sh3n}  I_{dril}  P_thick_{fail}  
h_{m}  h_{f}  h_{r}  d_{m}  d_{n}  
N  Thick  A_{shear}  I_{thick}  I_{plas}  
V_{X}  V_{Y}  V_{Z}  skew_ID  I_{P}  
${\varphi}_{1}$  ${\varphi}_{2}$  ${\varphi}_{3}$  ${\varphi}_{4}$  ${\varphi}_{5}$  
... ${\varphi}_{N}$ 
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. 1
(Integer) 

I_{smstr}  Shell small strain
formulation flag. 2
(Integer) 

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

I_{dril}  Drilling degree of freedom
stiffness flag. 7
(Integer) 

P_thick_{fail}  Percentage of layers that
must fail before the element is deleted. 9
10 $0.0\le P\_thic{k}_{fail}\le 1.0$ (Real) 

h_{m}  Shell membrane hourglass
coefficient. Default = 0.01 (Real) Default = 0.1 for hourglass type 3 (I_{shell} =3) 

h_{f}  Shell outofplane
hourglass. Default = 0.01 (Real) 

h_{r}  Shell rotation hourglass
coefficient. Default = 0.01 (Real) Default = 0.1 for hourglass type 3 (I_{shell} =3) 

d_{m}  Shell Membrane Damping. Only active for Material Laws 25, 32 and 36. Default =1.5% for I_{shell} =24 (QEPH)+LAW25, 32 and 36 Default =5.0% for I_{shell} =1,2,3,4,12+LAW25 Default =0.0% for I_{shell} =1,2,3,4,12+LAW32 and 36 (Real) 

d_{n}  Shell numerical damping.
4 Only used for I_{shell} =12 and 24. Default =1.5% for I_{shell} =24 (QEPH) Default =0.1% for I_{shell} =12 (QBAT) Default =0.01% for I_{shell} =30 (DKT18) (Real) 

N  Number of layers. Layer thickness is equal to Thick/N with 0 ≤ N ≤ 100. Default =1 (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. 5
(Integer) 

I_{plas}  Shell plane stress
plasticity flag. 6 It is available for Material Laws 2, 22, 32,
36 and 43.
(Integer) 

V_{X}  X component for reference
vector. 8 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. 8 Default = 0 (Integer) 

I_{P}  Reference direction in
shell plane. 8
(Integer) 

${\varphi}_{1}$  Angle for layer
1. (Real) 
$\left[\mathrm{deg}\right]$ 
${\varphi}_{2}$  Angle for layer
2. (Real) 
$\left[\mathrm{deg}\right]$ 
${\varphi}_{3}$  Angle for layer
3. (Real) 
$\left[\mathrm{deg}\right]$ 
${\varphi}_{4}$  Angle for layer
4. (Real) 
$\left[\mathrm{deg}\right]$ 
${\varphi}_{5}$  Angle for layer
5. (Real) 
$\left[\mathrm{deg}\right]$ 
${\varphi}_{N}$  Angle for layer
N with 0 ≤ N ≤ 100 (5
angles per Line). (Real) 
$\left[\mathrm{deg}\right]$ 
Example
#RADIOSS STARTER
#12345678910
# 1. LOCAL_UNIT_SYSTEM:
#12345678910
/UNIT/2
unit for prop
# MUNIT LUNIT TUNIT
kg mm ms
#12345678910
# 2. GEOMETRICAL SETS:
#12345678910
/PROP/SH_COMP/2/2
SH_COMP example
# Ishell Ismstr Ish3n Idrill Pthick_fail
12 0 0 0 0
# hm hf hr dm dn
0 0 0 .1 .1
# N Thick Ashear Ithick Iplas
6 1.8 0 1 1
# Vx Vy Vz skew_ID Ip
1 0 1 0 0
# Phi_1 Phi_2 Phi_3 Phi_4 Phi_5
60 30 0 30 60
90
#12345678910
#enddata
#12345678910
Comments
 I_{shell}, I_{sh3n} – 4node and 3node
shell formulation flag
 I_{shell} =1,2,3,4 (Q4): original 4 node Radioss shell with hourglass perturbation stabilization.
 I_{shell} = 24 (QEPH): formulation with hourglass physical stabilization for general use.
 I_{shell} =12 (QBAT): modified BATOZ Q4γ24 shell with four Gauss integration points and reduced integration for inplane shear. No hourglass control is needed for this shell.
 I_{sh3n} =30 (DKT18): BATOZ DKT18 thin shell with three Hammer integration points.
 Flag I_{shell} =2 is incompatible with one integration point for shell element.
 I_{smstr}  Small strain
formulation
 Small strain formulation is activated from time t= 0, if I_{smstr} = 1 or 3. It may be used for a faster preliminary analysis, but the accuracy of the results is not ensured. Any shell for which $\text{\Delta}\text{t<}\text{\Delta}{\text{t}}_{\text{min}}$ can be switched to a small strain formulation by Radioss Engine option /DT/SHELL/CST, except if I_{smstr} = 4.
 If I_{smstr} = 1 or 3, the strains and stresses which are given in material laws are engineering strains and stresses; otherwise they are true strains and stresses.
 h_{m}, h_{f}, and h_{r}  Hourglass coefficients
 h_{m}, h_{f}, and h_{r} are only used for Q4 shells (I_{shell} =1,2,3,4). 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.
 d_{n}  Shell
numerical damping coefficient
 d_{n} is only used for I_{shell} =12, 24 and I_{sh3n} = 30:
 for I_{shell} =24 (QEPH) d_{n} is used for hourglass stress calculation.
 for I_{shell} =12 (QBAT) d_{n} is used for all stress terms, except transvers shear
 for I_{sh3n} =30 (DKT18) d_{n} is only used for membrane
 d_{n} is only used for I_{shell} =12, 24 and I_{sh3n} = 30:
 I_{thick}  Shell resultant
stresses calculation flag
 Flag I_{thick} is automatically set to 1 for /MAT/LAW32 (HILL).
 If I_{thick} =1, the small strain option is automatically deactivated in the corresponding type of element.
 I_{plas}  Shell plane stress
plasticity flag
 It is recommended to use I_{plas} = 1, if I_{thick} = 1.
 If I_{plas}=1, the small strain option is automatically deactivated in the corresponding type of element.
 I_{dril}
 Drilling DOF stiffness is recommended for implicit solutions especially for Riks method and bending dominated problems.
 I_{dril} is available for QEPH, QBAT (I_{shell} =12 and 24), and standard triangle (C0) shell elements (I_{sh3n} = 1 and 2).
 Anisotropy direction
definition.The reference vector $V$ is defined as following according flag I_{P}:
 If I_{P}=0 and skew_ID = 0, the reference vector $V$ is defined with VX, VY and VZ.
 If I_{P}=0 and skew_ID ≠ 0, the reference vector $V$ is the first direction (local X) of the local coordinate system skew_ID.
 If I_{P} = 20, the reference vector $V$ is defined with the node N1 and N2 of the shell elements.
 If I_{P} = 22, the reference vector $V$ is the first direction (local X) of the local coordinate system skew_ID. Vector components VX, VY and VZ are ignored.
 If I_{P} = 23, the reference vector $V$ is defined with VX, VY and VZ. Local coordinate system skew_ID is ignored.
The reference vector $V$ is projected on the shell element plane and becomes the vector ${V}^{\prime}$ . Then for each layer, the 1^{st} material direction (m1) is vector ${V}^{\prime}$ turned ${\varphi}_{\text{\hspace{0.17em}}i}$ degrees (turns positive direction around shell normal $n$ ).The hierarchy order to define the reference vector $V$ is: initial state card (/INISHE/ORTHO)
 shell property
In case of reference metrics, the orientation for directions of anisotropy must be defined with the reference geometry, not the initial one.
The 2^{nd} material direction m2 is derived from direction m1 rotated 90 degrees (orthotropic).
Layers are overlaying one by one from bottom to top.  P_thick_{fail} parameter is not compatible with failure defined within the material law itself, such as plastic failure strain in LAW36.
 Element deletion
rules used with /FAIL models:
 Underintegrated elements (Belytchko, QEPH, DKT18):
 f more than one failure model is applied to the shell material,
or
P_thick_{fail}=0
(blank), the value of
P_thick_{fail}
is calculated individually from each failure model
settings.Example:
 Ifail_sh = 1
 One integration point failure sufficient to delete element.
 Ifail_sh = 2
 All integration points failure is necessary to delete the element.
 If only one failure model is applied to the material, the P_thickfail value from the property is taken by default and overwrites local I_{fail_sh} settings from the failure model.
 f more than one failure model is applied to the shell material,
or
P_thick_{fail}=0
(blank), the value of
P_thick_{fail}
is calculated individually from each failure model
settings.
 Fully integrated shells (Batoz, DKT_S3):
 The rule described for underintegrated shells applies to each Gauss point separately. P_thick_{fail} ratio is checked for all integration points in thickness for each inplane Gauss point. The element is deleted only when all Gauss points reach P_thick_{fail} ratio criteria.
 Underintegrated elements (Belytchko, QEPH, DKT18):