کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
442648 | 692318 | 2012 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Mixed-element volume completion from NURBS surfaces Mixed-element volume completion from NURBS surfaces](/preview/png/442648.png)
In this paper we present a methodology to create a volumetric representation from a 2-manifold without boundaries represented with untrimmed NURBS surfaces. A trivariate NURBS representation is difficult to construct from such a representation, especially when the input surface patches were created with only a boundary representation as the goal. These kinds of inputs arise in numerous existing geometric modeling scenarios such as models from CAD systems, subdivision surfaces, quadrilateral meshing and data-fitting. Our approach, nearly automatic and only requiring minimal user input, creates a hybrid representation using trivariate NURBS elements at the boundary and unstructured tetrahedral elements in the interior of the object. The original boundary representation of the input model is maintained in the final representation, allowing the volumetric representation to be used in both computer graphics simulations and isogeometric analysis applications. We demonstrate that the hybrid representation yields convergence under model refinement, and that it can be used efficiently in elastic body simulation.
Figure optionsDownload high-quality image (780 K)Download as PowerPoint slideHighlights
► Mixed-element representation consisting of smooth and higher-order NURBS element and linear elements.
► Methodology applied to examples in 2D and 3D.
► Simulation studies validate hybrid representation.
Journal: Computers & Graphics - Volume 36, Issue 5, August 2012, Pages 548–554