Direct Editing on Hexahedral Mesh through Dual Operations

The finite element mesh regeneration, which is usually required during the design model verification process, is time consuming. Mesh editing is a kind of efficient mesh regeneration technique. In this paper, a direct editing method for hexahedral mesh is proposed to achieve high quality and adaptive hexahedral mesh regeneration. After the user applies direct editing on the CAD model, effective mesh deformation and optimization are automatically conducted on the associated hexahedral mesh model. To optimize the deformed mesh, firstly, simplified fundamental sheet configuration conversions are applied to improve the boundary mesh quality; secondly, dual operations are carried out to insert/extract entire sheets; thirdly, according to the measurement of the hexahedron deformation, those mesh regions whose mesh sizes become not reasonable due to the deformation are coarsened and refined through localized dual operations. The proposed method can not only effectively achieve hexahedral mesh editing, but also facilitate the interoperation of CAD model and mesh model.