3DEC Meshing

In 3DEC, a discontinuous medium is represented as an assemblage of discrete blocks. Boundaries between blocks are treated as discontinuities along which large displacements and rotations between blocks are allowed. Individual blocks can behave as deformable material, in which case the block is subdivided into a mesh of finite difference elements (i.e., continuous assemblages of zones).

Itasca CAD-based meshing tools allow you to build block models to input to 3DEC. Zoning of deformable blocks is usually done directly in 3DEC, automatically.







Primitives Commands & FISH

  • Available from the command line
  • Any type of problem
  • Better suited for simple geometries
  • Can results in poor quality and heavy mesh for complex geometries
  • Efficiency
  • Includes tunnel primitive
  • Planar cuts commands can be used to intersect blocks with any number of planes
  • Includes cube command to generate a region based on a user-defined outline
  • FISH language can be used to automate planar cuts to construct the desired geometry (such as complex tunnel shapes, for example)


VRML to Block converter EXE

  • Executable requiring VRML input file
  • Any type of problem
  • Handles any closed convex volumes
  • Distributed free with3DEC
  • Efficiency
  • Quality
  • Uses common VRML CAD format
  • Allows automatically creation of blocks for import into3DEC based on closed convex volumes (input in VRML format)


Interactive BlockRanger

  • Available from the Rhino interface
  • Any type of problem
  • Better suited for simple to moderately complex geometries
  • Output of hex blocks (v1.2 and up) and tetrahedral blocks
  • Quality
  • CAD system environment
  • Itasca interactive mapped mesher
  • Generates hexahedral blocks


Interactive Griddle (NEW)

  • Available from the Rhino interface
  • Any type of problem
  • Better suited for complex geometries
  • Efficiency
  • NEW Itasca interactive automesher
  • Generates tetrahedral and hex-dominant meshes
Introduction to Meshing Updates

Latest News
  • 3DEC 7 is officially released! Enhanced user interface with new automated block and zone generation tools, and new structural elements....
    Read More
  • Open Pit Dewatering: Dewater, Derisk, Deliver Learn more about developing an effective strategy for open pit dewatering and avoiding common pitfalls...
    Read More
  • Tutorial Series: Analyzing a Homogeneous Embankment Dam using FLAC 8.1 This is a three part tutorial series to calculate the total and effective stresses and...
    Read More

Upcoming Events
21 Sep
71st Highway Geology Symposium
Better highways through applied geology... Read More
12 Oct
CANCELED -- Focused Seismic and Liquefaction Training 2020
... Read More
18 Oct
Geothermal Resources Council Annual Meeting & Expo
Advancing the global geothermal industry through transfer of robust research, knowledge and guidance.... Read More