Computational Framework for Segmentation and Grouping
Computational Framework for Segmentation and Grouping
Normal vector voting: crease detection and curvature estimation on large, noisy meshes
Graphical Models - Special issue: Processing on large polygonal meshes
New smoothing procedures in contact mechanics
Journal of Computational and Applied Mathematics - Special issue: Selected papers from the 2nd international conference on advanced computational methods in engineering (ACOMEN2002) Liege University, Belgium, 27-31 May 2002
A New Bilateral Mesh Smoothing Method by Recognizing Features
CAD-CG '05 Proceedings of the Ninth International Conference on Computer Aided Design and Computer Graphics
Mesh Generation: Application to Finite Elements
Mesh Generation: Application to Finite Elements
Feature detection of triangular meshes based on tensor voting theory
Computer-Aided Design
Simple local interpolation of surfaces using normal vectors
Computer Aided Geometric Design
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A contact smoothing technique is developed in the frame of metal forming applications, especially for processes where the contact area is quite small with respect to the component size. In fact, the non-smoothness of contact surfaces discretized by finite elements shows to be a key problem to the simulation accuracy. The smoothing technique is based on building a higher order quadratic interpolation of the curved surface, using the node positions and their normal vectors, as proposed by Nagata. Within a local and easy to parallelize procedure, accurate normal vectors are calculated at each node from the existing discretized surface by considering a patch of surrounding elements and following a normal voting strategy. Corner and edges are automatically detected by analysing eigenvalues of derived covariant matrix. The efficiency and reliability of the resulting contact model are assessed on several examples, such as ironing a bulk parallelepiped or a plate, before being applied to metal forming processes, such as wire drawing, rolling of long products and orbital forging.