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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)

- Steven J Owen, Sunil Saigal
- 1997

A method is presented for controlling element sizes on the interior of areas during surface meshing. A Delaunay background mesh is defined over which a neighborhood based interpolation scheme is used to interpolate element sizes. A brief description of natural neighbor interpolation is included and compared to linear interpolation. Two specific applications… (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)

- Alexandre Cunha, Scott Canann, Sunil Saigal
- 1997

1 ABSTRACT The numerical solution of problems in science and engineering via the finite element method requires, as a first step, the discretization of a domain into a set of simply shaped elements. Determining the size of these elements along the domain, including the boundary, to form well-shaped elements is a difficult task. We present in this paper a… (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)

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