Users:General FEM Analysis/Elements Reference/Shell9
From Carat++ Public Wiki
The element formulation is based on the Shell8.
Contents |
Input Parameters
Parameter Description
Compulsory Parameters | ||
Parameter | Values, Default(*) | Description |
---|---|---|
MAT | EL-MAT int | Linking to a material input block |
INT_TYPE_SHELL9 | FULL | Control of integration type |
ANS | NONE, Q, T, QT, TQ | Assumed Natural Strains (ANS) method:
|
EAS | M,B,T,Q,S | Enhances Assumed Strains (EAS) method
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FORCE | XYZ, RST_ORTHO, RST | Output control for stress constraints
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SDC | real | condition factor for director length, recommended value: 1.0 |
ROTATORIC_DOFS | DIR_DIFF, GLOB_6 | Switch between director and rotational degrees of freedom. |
STRESS_OUTPUT | PRIN_VM, SIG_EPS | Stress output type
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STRESS_EVAL | GP, SURF | Stress evaluation location.
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Optional Parameters | ||
Parameter | Values, Default(*) | Description |
THICKNESS | real | Element thickness. This parameter is not compulsory, as the thickness can also be described via nodal values. |
Example of a Complete Input Block
EL-PROP 1: SHELL9 MAT=EL-MAT 1 THICKNESS = 0.1 INT_TYPE_SHELL9 = FULL SDC = 1.0 EAS = 4,4,4,4,4 ANS = NONE FORCE = XYZ MATERIAL_ANGLE = 0 ROTATORIC_DOFS = DIR_DIFF STRESS_OUTPUT = PRIN_VM STRESS_EVAL = SURF
Benchmarks
The main benchmark files in the Carat++-repository are
'../examples/benchmark_examples/elements/shell9_4_temperature_nln/cbm_SHELL_4NODED.dat'
'../examples/benchmark_examples/elements/shell9_8_temperature_nln/cbm_SHELL_8NODED.dat'
Known issues
Eigenvalue analysis with DIR_DIFF gives wrong results (AE, SSH;2017)
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