Block Format Keyword
/PROP/TYPE10 - Composite Shell Property Set
Description
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 induvial orthotropic direction.
Format
(1)
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(2)
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(3)
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(4)
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(5)
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(6)
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(7)
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(8)
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(9)
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(10)
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/PROP/TYPE10/prop_ID/unit_ID or /PROP/SH_COMP/prop_ID/unit_ID
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prop_title
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Ishell
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Ismstr
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Ish3n
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Idrill
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hm
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hf
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hr
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dm
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dn
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N
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Istrain
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Thick
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Ashear
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Ithick
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Iplas
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VX
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VY
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VZ
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... 
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Field
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Contents
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SI Unit Example
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prop_ID
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Property identifier
(Integer, maximum 10 digits)
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unit_ID
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Optional unit identifier
(Integer, maximum 10 digits)
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prop_title
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Property title
(Character, maximum 100 characters)
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Ishell
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Shell element formulation flag
(Integer)
= 0: use value in /DEF_SHELL
= 1: Q4, visco-elastic hourglass modes orthogonal to deformation and rigid modes (Belytschko)
= 2: Q4, visco-elastic hourglass without orthogonality (Hallquist)
= 3: Q4, elasto-plastic hourglass with orthogonality
= 4: Q4 with improved type 1 formulation (orthogonalization for warped elements)
= 12: QBAT shell formulation
= 24: QEPH shell formulation
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Ismstr
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Shell small strain formulation flag
(Integer)
= 0: use value in /DEF_SHELL
= 1: small strain from time = 0 (formulation compatible with all other formulation flags)
= 2: full geometric nonlinearities with possible small strain formulation activation in RADIOSS Engine (option /DT/SHELL/CST)
= 3: old small strain formulation (only compatible with Ishell = 2)
= 4: full geometric nonlinearities (in RADIOSS Engine, option /DT/SHELL/CST has no effect)
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Ish3n
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3 node shell element formulation flag
(Integer)
= 0: use value in /DEF_SHELL
= 1: standard triangle (C0)
= 2: standard triangle (C0) with modification for large rotation
= 30: DKT18
= 31: DKT_S3, which based on DTK12 of BATOZ (refer to the Theory Manual)
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Idrill
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Drilling degree of freedom stiffness flag
(Integer)
= 0: no
= 1: yes
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hm
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Shell membrane hourglass coefficient
Default = 0.01 (Real)
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hf
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Shell out-of-plane hourglass
Default = 0.01 (Real)
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hr
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Shell rotation hourglass coefficient
Default = 0.01 (Real)
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dm
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Shell membrane damping
(Real)
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dn
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Shell numerical damping
(Real)
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N
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Number of layers
Layer thickness is equal to Thick/N with 0 < N < 100
Default set to 1 (Integer)
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Istrain
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Compute strains for post-processing flag
(Integer)
= 0: default set to value defined with /DEF_SHELL
= 1: yes
= 2: no
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Thick
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Shell thickness
(Real)
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Ashear
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Shear factor
Default is Reissner value: 5/6 (Real)
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Ithick
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Shell resultant stresses calculation flag
(Integer)
= 0: default set to value defined with /DEF_SHELL
= 1: thickness change is taken into account
= 2: thickness is constant
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Iplas
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Shell plane stress plasticity flag
(Integer)
= 0: default set to value defined with /DEF_SHELL
= 1: iterative projection with three Newton iterations
= 2: radial return
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VX
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X component for reference vector
Default = 1.0 (Real)
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VY
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Y component for reference vector
Default = 0.0 (Real)
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VZ
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Z component for reference vector
Default = 0.0 (Real)
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Angle for layer 1
(Real)
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Angle for layer 2
(Real)
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Angle for layer 3
(Real)
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Angle for layer 4
(Real)
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Angle for layer 5
(Real)
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Angle for layer N with 0 < N < 100
(Real)
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6 layers with different material direction (fiber direction).
#RADIOSS STARTER
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
#- 1. LOCAL_UNIT_SYSTEM:
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/UNIT/2
unit for prop
# MUNIT LUNIT TUNIT
kg mm ms
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
#- 2. GEOMETRICAL SETS:
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
/PROP/SH_COMP/2/2
SH_COMP example
# Ishell Ismstr Ish3n Idrill
12 0 0 0
# hm hf hr dm dn
0 0 0 .1 .1
# N Istrain Thick Ashear Ithick Iplas
6 0 1.8 0 1 1
# Vx Vy Vz
1 0 1
# Phi_1 Phi_2 Phi_3 Phi_4 Phi_5
-60 -30 0 30 60
90
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
#enddata
#---1----|----2----|----3----|----4----|----5----|----6----|----7----|----8----|----9----|---10----|
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| 1. | Q4: original 4 nodes RADIOSS shell with hourglass perturbation stabilization. |
QEPH: formulation with hourglass physical stabilization for general use.
QBAT: modified BATOZ Q4 y24 shell with four Gauss integration points and reduced integration for in-plane shear. No hourglass control is needed for this shell.
DKT18: BATOZ DKT18 thin shell with three Hammer integration points.
| 2. | Flag Ishell = 2 is incompatible with one integration point for shell element. |
| 3. | Small strain formulation is activated from time t= 0, if Ismstr = 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  can be switched to a small strain formulation by RADIOSS Engine option /DT/SHELL/CST, except if Ismstr = 4. |
| 4. | hm, hf, and hr are only used for Q4 shells. They must have a value between 0 and 0.05. |
| 5. | For hourglass type 3, hourglass maximum values may be larger, default values are 0.1 for hm and hr. |
| 6. | Shell membrane damping dm can be only used for Material Laws 19, 25, 32 and 36: |
| • | the default value of dm is 5% for Law 25 |
| • | the default value of dm is 25% for Law 19 |
| 7. | The same default value of dm is used in any case for QBAT shells, except for: |
| • | the default value of dm for QEPH is 1.5% for Material Laws 2, 19, 32, 36 and 43 |
For further information about dm coefficient, refer to the RADIOSS Theory Manual.
| 8. | Shell numerical damping dn is only used for Ishell =12 or 24: |
| • | for Ishell =22 or 24 dn is used for hourglass stress calculation |
| • | for QBAT, dn is used for all stress terms, except transvers shear |
| • | for DKT18, dn is only used for membrane |
| 9. | The default value of dn is: |
| 10. | If Ithick or Iplas are activated, the small strain option is automatically deactivated in the corresponding type of element. |
| 11. | If the small strain option is set to 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. |
| 12. | Flag Iplas is available for Material Laws 2, 22, 32, 36, and 43. |
| 13. | Flag Ithick is automatically set to 1 for Material Law 32. |
| 14. | Flag Istrain is automatically set to 1 for Material Law 25. |
| 15. | It is recommended to use Iplas = 1, if Ithick = 1. |
| 16. | Input components of the global vector  are defined in Line 6. |
| 17. | Projection of vector  on shell element plane becomes the vector  |
| 18. | Direction 1 of local coordinate system of orthotropy is defined with the vector  and angle  (angle in degree). |
| 19. |  is the angle (in degree) between direction 1 of orthotropy and projection of the vector  on the shell for layer i. |
| 20. | Layer 1 corresponds to zmin and layer N to zmax. |
| 21. | Input as many formats as necessary to define the angles (5 per Line 7). |
| 22. | Idrill is available for QEPH, QBAT (Ishell =12 and 24), and standard triangle (C0) shell elements (Ish3n = 1 and 2). |
| 23. | Drilling DOF stiffness is recommended for implicit solutions especially for Riks method and bending dominated problems. |
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See Also:
Material Compatibility
RADIOSS Coordinate System
Hourglass Formulations in User's Guide
Integration points through shell thickness in FAQ
Integration scheme for different shell property in FAQ
Composite Shell Elements in Theory Manual
