Users:General FEM Analysis/Elements Reference/Cord 3D NURBS
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Contents |
General Description
Coded and testing is in progress.
Element Type
- This element provides a geometrically nonlinear, isogeometric spatial cable.
- Mass computation is implemented.
The formulation is stabilized by an additional bending stiffness based on Raknes et al.[1]. The bending stiffness is computed out of the area with the assumption of a circular cross section.
Degrees of Freedom
The element uses the translatoric degrees of freedom (Disp_X, Disp_Y, Disp_Z) at each control point.
Parameter Description
| Compulsory Parameters | ||
| Parameter | Values, Default(*) | Description |
|---|---|---|
| MAT | EL-MAT int | Linking to a material input block |
| INT_TYPE_CORD_3D_NURBS | FULL, USER | Control of integration type.
|
| CROSS SECTION | AREA = float | area of the cross section |
| Optional Parameters | ||
| Parameter | Values, Default(*) | Description |
| GAUSS_U | GAUSS_U = int | Number of Gauss point per element. Must only to be defined when INT_TYPE_CORD_3D_NURBS = USER |
Example of a Complete Input Block
EL-PROP 1 : CORD_3D_NURBS MAT= EL-MAT 1 AREA=1.0000e-001 INT_TYPE_CORD_3D_NURBS = FULL !or: INT_TYPE_CORD_3D_NURBS = USER GAUSS_U = 3
Element Loading
The Cord_3D_NURBS element is able to carry the following loads:
- dead load
- snow load
- pressure load
- temperature load (not tested)
Benchmarks
Currently, no main benchmark file in the Carat++-repository is available.
References
- ↑ S.B. Raknes, X. Deng, Y. Bazilevs, D.J. Benson, K.M. Mathisen, T. Kvamsdal: „Isogeometric rotation-free bending-stabilized cables: Statics, dynamics, bending strips and coupling with shells“, in „Computer methods in applied mechanics and engineering“, Vol. 263, 2013, Seiten 127-143 http://dx.doi.org/10.1016/j.cma.2013.05.005
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