Realization of CAD-integrated shell simulation based on isogeometric B-Rep analysis

An entire design-through-analysis workflow solution for isogeometric B-Rep analysis (IBRA), including both the interface to existing CADs and the analysis procedure, is presented. Possible approaches are elaborated for the full scope of structural analysis solvers ranging from low to high isogeometr...

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Veröffentlicht in:Advanced modeling and simulation in engineering sciences Jg. 5; H. 1; S. 1 - 54
Hauptverfasser: Teschemacher, T., Bauer, A. M., Oberbichler, T., Breitenberger, M., Rossi, R., Wüchner, R., Bletzinger, K.-U.
Format: Journal Article Verlag
Sprache:Englisch
Veröffentlicht: Cham Springer International Publishing 04.07.2018
Springer
SpringerOpen
Schriftenreihe:Unfitted techniques in computational mechanics
Schlagworte:
CAD
CAD-integrated analysis
Classical and Continuum Physics
Computational Science and Engineering
Computer-aided design
Design-through-analysis workflow
Disseny assistit per ordinador
Engineering
Engineering Sciences
Enginyeria civil
Exchange format
IBRA
IGA
Isogeometric B-Rep analysis
Materials i estructures
Mathematical models
Research Article
Simulació per ordinador
Theoretical and Applied Mechanics
Unfitted techniques in computational mechanics
Àrees temàtiques de la UPC
CAD-integrated analysis
IGA
Design-through-analysis workflow
Isogeometric B-Rep analysis
CAD
Exchange format
IBRA
Computer-aided design
ISSN:2213-7467, 2213-7467
Online-Zugang:Volltext
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Beschreibung
Zusammenfassung:An entire design-through-analysis workflow solution for isogeometric B-Rep analysis (IBRA), including both the interface to existing CADs and the analysis procedure, is presented. Possible approaches are elaborated for the full scope of structural analysis solvers ranging from low to high isogeometric simulation fidelity. This is based on a systematic investigation of solver designs suitable for IBRA. A theoretically ideal IBRA solver has all CAD capabilities and information accessible at any point, however, realistic scenarios typically do not allow this level of information. Even a classical FE solver can be included in the CAD-integrated workflow, which is achieved by a newly proposed meshless approach. This simple solution eases the implementation of the solver backend. The interface to the CAD is modularized by defining a database, which provides IO capabilities on the base of a standardized data exchange format. Such database is designed to store not only geometrical quantities but also all the numerical information needed to realize the computations. This feature allows its use also in codes which do not provide full isogeometric geometrical handling capabilities. The rough geometry information for computation is enhanced with the boundary topology information which implies trimming and coupling of NURBS-based entities. This direct use of multi-patch trimmed CAD geometries follows the principle of embedding objects into a background parametrization. Consequently, redefinition and meshing of geometry is avoided. Several examples from illustrative cases to industrial problems are provided to demonstrate the application of the proposed approach and to explain in detail the proposed exchange formats.
ISSN:2213-7467
2213-7467
DOI:10.1186/s40323-018-0109-4