Users:General FEM Analysis/Elements Reference/NURBS BRep Edge coupling
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Contents |
General Description
Element Type
The formulation is based on Breitenberger et al. [1]. The element allows to
- coupling trimmed NURBS surfaces for geometrically linear and nonlinear analysis.
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 |
|---|---|---|
| INT_TYPE_NURBS_EDGE_COUPLING | FULL, USER | Control of integration type.
|
| BREP_TYPE | COUPLING_DISP, COUPLING_ROT, COUPLING_DISP_ROT | Type of coupling.
|
| BL_FACTOR_DISP | BL_FACTOR_DISP= float | penalty factor for the displacement |
| BL_FACTOR_ROT | BL_FACTOR_ROT= float | penalty factor for the rotation |
| 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 : NURBS_BREP_EDGE_COUPLING BREP_TYPE = COUPLING_DISP ! or: COUPLING_ROT, COUPLING_DISP_ROT !NITSCHE=AUTO BL_FACTOR_DISP = 10000 BL_FACTOR_DISP = 10000 INT_TYPE_NURBS_EDGE_COUPLING = USER or FULL GAUSS_U = 4
Element Loading
The NURBS_BRep_Edge_Cord element is able to carry the following loads:
- dead load
- snow load
- pressure load
- temperature load (not tested)
Benchmarks
The main benchmark file in the Carat++-repository (cmake option extensive benchmarks is
- '../examples/benchmark_examples/isogeometric/x_ibra_oilsump_8mm/xcbm_oilsump_8mm.txt'.
References
- ↑ Breitenberger, M.; Apostolatos, A.; Philipp, B.; Wüchner, R.; Bletzinger, K.-U.: Analysis in computer aided design: Nonlinear isogeometric B-Rep analysis of shell structures. Computer Methods in Applied Mechanics and Engineering 284, 2015, 401--457
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