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This paper proposes a method for predicting the complexity of meshing Computer Aided Design (CAD) geometries with unstructured, hexahedral, finite elements. Meshing complexity refers to the relative level of effort required to generate a valid finite element mesh on a given CAD geometry. A function is proposed to approximate the meshing complexity for… (More)

This paper presents an algorithm for imprinting and merging adjacent parts. Imprint and merge is often used to facilitate generation of conformal meshes between adjacent parts. The algorithm tolerantly intersects the discretized boundary edges of adjacent faces to calculate the imprint Boolean. An input tolerance is used during the process to minimize the… (More)

Quad-morphing is a new technique used for generating quadrilaterals from an existing triangle mesh. Beginning with an initial triangulation, triangles are systematically transformed and combined. An advancing front method is used to determine the order of transformations. An all-quadrilateral mesh containing elements aligned with the area boundaries with… (More)

- Antonio E. Castellvi, Hao Huang, Tov Vestgaarden, Sunil Saigal, Deborah H. Clabeaux, David Pienkowski
- SAS journal
- 2007

BACKGROUND
Conventional (rigid) fusion instrumentation is believed to accelerate the degeneration of adjacent discs by increasing stresses caused by motion discontinuity. Fusion instrumentation that employs reduced rod stiffness and increased axial motion, or dynamic instrumentation, may partially alleviate this problem, but the effects of this… (More)

- Dale E Gary, Vincent Oria, Sunil Saigal, Richard T Sweeney, Nicholas P Tworischuk, George Abdou +16 others
- 2011

This paper proposes an accurate and efficient process that reconstructs, smoothes, and simplifies large-scale, three-dimensional models with multiple regions from serial sections. Models are reconstructed using a generally classed marching tetrahedra method that is less complex than the recent generally classed marching cubes algorithms , yet still… (More)

This paper proposes a method for predicting the complexity of meshing computer aided design (CAD) geometries with unstructured, hexahedral, finite elements. Meshing complexity refers to the relative level of effort required to generate a valid finite element mesh on a given CAD geometry. A function is proposed to approximate the meshing complexity for… (More)