Locking Removal Techniques for the Isogeometric Formulation of Curved Beams
| Autor: | Edita Dvořáková, Bořek Patzák |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Timoshenko beam theory
Engineering business.industry General Engineering Basis function 02 engineering and technology Structural engineering Isogeometric analysis 01 natural sciences 010101 applied mathematics Shear (sheet metal) 020303 mechanical engineering & transports 0203 mechanical engineering 0101 mathematics Element (category theory) business Beam (structure) Removal techniques |
| Zdroj: | Advanced Materials Research. 1144:109-114 |
| ISSN: | 1662-8985 |
| DOI: | 10.4028/www.scientific.net/amr.1144.109 |
| Popis: | The isogeometric formulation seems to be advantageous especially when it comes to curved geometries such as curved beams and shells. In this paper, the NURBS isogeometric formulation of beam element is presented. The same basis functions are used for both geometry description and unknown approximations so there is no accuracy loss caused by a geometry approximation. The element is based on Timoshenko beam theory which enables the use of the element for both thick and thin beams, nevertheless in case of thin beams the shear-locking phenomena is observed. In the paper it is shown that the reduced integration is insufficient for locking removal and capability of Discrete Shear Gap (DSG) method to unlock the elements is examined. For clear demonstration of locking-removal techniques the implemented element is first tested for the case of straight beam, then the performance is demonstrated on the curved geometry. |
| Databáze: | OpenAIRE |
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