SECCONTROL, VAL1, VAL2, VAL3, VAL4, VAL5, VAL6, VAL7, VAL8, VAL9, VAL10, VAL11, VAL12, VAL13
Supplements or overrides default section properties.
VAL1, VAL2, VAL3, . . . , VAL13Values, such as the length of a side or the numbers
of cells along the width, that describe the geometry of a section.
See the "Notes" section of this command
description for details about these values for the various section
types.
Beams
Type: BEAM
Data to provide in the value fields (VAL1 through
VAL4): |
TXZ – User transverse shear stiffness. |
| -- – Unused field. |
TXY – User transverse shear stiffness. |
ADDMAS – Added mass per unit length. |
Links
Type: LINK
Data to provide in the value fields (VAL1,
VAL2, VAL3,
VAL4, VAL5,
VAL6): |
ADDMAS – Added mass per unit length. |
TENSKEY – Flag specifying tension and compression,
tension only, or compression only (not valid for
CABLE280: |
| 0 – Tension and compression
(default). |
| 1 – Tension only. |
| -1 – Compression only. |
CV1, CV2 – Damping coefficients. |
CV3 – Compressive stiffness scaling factor (for
CABLE280 only). The ratio between compressive stiffness and
tensile stiffness. Default – 1.0e-5. Maximum – 1.0. |
CV4 – Viscous regularization factor (for
CABLE280 only). Default – 0.05. Maximum –
1.0. |
Pipes
Type: PIPE
Data to provide in the value field (VAL1): |
ADDMAS – Added mass per unit length. Use this
value to account for extra hardware only. |
| Notes |
| Other masses are handled as follows: |
The mass of the internal fluid is accounted for by Mint on the SECDATA command.
The mass of the outer covering (insulation) is accounted
for by Mins on the SECDATA command.
The mass of the external fluid is accounted for by MATOC on the OCDATA command.
Shells
Type: SHELL
Data to provide in the value fields (VAL1 through
VAL8): |
E11 – User transverse-shear
stiffness. |
E22 – User transverse-shear
stiffness. |
E12 – User transverse-shear
stiffness. |
ADDMAS – Added mass-per-unit area. |
HMEMSCF – Hourglass-control membrane-scale
factor. |
HBENSCF – Hourglass-control bending-scale
factor. |
DRLSTIF – Drill-stiffness scale factor. |
BENSTIF – Bending-stiffness scale factor
(SHELL181 and SHELL281). |
Reinforcing
Type: REINF
Data to provide in the value fields (VAL1,
VAL2, VAL3): |
TENSKEY – Specifies tension-and-compression,
tension-only, or compression-only reinforcing behavior (valid for structural reinforcing
analysis): |
| 0 – Tension and compression
(default). |
| 1 – Tension only. |
| -1 – Compression only. |
| ––––––––––––– |
REMBASE – Specifies how base-element material is
handled: |
| 0 – Retain base-element material in the space occupied by the reinforcing
fibers (default). |
| 1 – Remove base-element material in the space occupied by the reinforcing
fibers. |
| ––––––––––––– |
STSSTATE – Specifies the reinforcing stress state
or heat flow: |
| For smeared reinforcing: |
0 – Uniaxial-stress state (for structural reinforcing analysis)
or uniaxial heat flow (for thermal reinforcing analysis). Only
kxx is required. (Default.) |
| 1 – Plane-stress state (for structural reinforcing analysis)
or anisotropic heat flow (for thermal reinforcing analysis). Both kxx
and kyy are specified. |
| 2 – Plane-stress state with transverse shear stiffness. Valid for 3D smeared
structural reinforcing analysis. |
| 3 – Plane-stress state with transverse shear stiffness and bending stiffness.
Valid for 3D smeared structural reinforcing analysis with solid base elements. |
| For discrete reinforcing: |
| 0 – Uniaxial stiffness, or uniaxial heat flow for thermal reinforcing
analysis. (Default.) |
| 1 – Uniaxial, bending, and torsional stiffness with square cross section.
Valid for 3D structural reinforcing analysis with solid base elements. |
| 2 – Uniaxial, bending, and torsional stiffness with
circular cross section. Valid for 3D structural reinforcing analysis with solid base
elements. |
| Notes |
REMBASE = 1 typically leads to more accurate models. (The
base material must support 1D stress states.) For structural-reinforcing analysis, the
base-element material consists of mass, stiffness, and body force. For thermal-reinforcing
analysis, the base-element material consists of damping, conduction, and heat generation,
and the base-element surface loads (convection and heat flux) are not subtracted. This
option is not valid when the base-element material is anisotropic. |
For smeared reinforcing with STSSTATE = 0, the equivalent
thickness h of the smeared reinforcing layer is determined by h =
A / S, where
A is the cross-section area of a single fiber and
S is the distance between two adjacent fibers. (See
SECDATA.) |
STSSTATE = 1 to 3 is suitable for
homogenous reinforcing layers (membrane) and applies to smeared reinforcing only
(SECTYPE,,REINF,SMEAR). For smeared reinforcing with
STSSTATE = 1 to 3, discrete reinforcing with
STSSTATE = 1 or 2, TENSKEY is ignored,
and the default tension and compression behaviors apply to the reinforcing layers; also, the
cross-section area input A is the thickness of the reinforcing
layers and the distance input S is ignored. (See
SECDATA and REINF265 Structural/Thermal Input Data in the Element Reference.) |
For smeared reinforcing with
STSSTATE = 3 or discrete reinforcing with
STSSTATE = 1 or 2, bending or torsional reinforcing stiffness may
not be captured adequately when using reinforcing with overly refined high-order base
tetrahedral elements (SOLID187 or degenerated
SOLID186) and the stiffness ratio between reinforcing and base
elements is excessive (> 100x). |
Specified TENSKEY, REMBASE and
STSSTATE values apply to all fibers defined
in the current section. |
| For more information, see Reinforcing and Direct Element Embedding in the Structural Analysis Guide. |
