Hexahedral meshes for some geometry types can be directly coded (e.g. Tetrahedral meshing (and constrained Delaunay tessellation) of multi-region domains is enabled through an interface with the TetGen package ( HELP_runTetGen and HELP_constrainedDelaunayTetGen). for computer aided manufacture and 3D printing. Geometries can also be exported to the STL format e.g. HELP_tri2quad, HELP_quad2tri), and mesh dual computation ( HELP_patch_dual). HELP_subtri, HELP_subTriDual and HELP_subQuad), mesh type conversions (e.g. HELP_regionTriMesh2D and HELP_multiRegionTriMeshUneven2D), resampling meshes geodesically ( DEMO_geodesic_remeshing), smoothing ( DEMO_surface_smooth_methods), and surface mesh refinement (e.g. Surface meshing toolsĢD multi-region triangular meshing (e.g. Simple geometries such as spheres ( HELP_geoSphere), boxes ( HELP_quadBox), platonic solids ( HELP_platonic_solid), and rhombic dodecahedra ( HELP_rhombicDodecahedron) can also be directly created using GIBBON. For generating geometries within MATLAB®, GIBBON also provides several CAD-style commands such as polygon rounding ( HELP_filletCurve), revolution ( HELP_polyRevolve), extrusion ( HELP_polyExtrude), and sweeping and lofting ( HELP_polyLoftLinear and HELP_sweepLoft). Using GIBBON, geometry can be imported from common mesh based CAD files (such as STL, HELP_import_STL). The segmented image data can be converted to 3D surface models ( DEMO_imx_levelset_surface_compare) which can be meshed for FEA ( HELP_runTetGen).

GIBBON offers image filtering and smoothing methods, and has a graphical user interface for 3D image segmentation ( HELP_imx.m). The combination provides a highly flexible image-based modelling environment and enables advanced inverse finite element analysis. GIBBON (The Geometry and Image-Based Bioengineering add-ON) is an open-source MATLAB toolbox, which includes an array of image and geometry visualization and processing tools and is interfaced with free open source software such as TetGen, for robust tetrahedral meshing, and FEBio for finite element analysis.

Abaqus 2019 help documentation