What's New in 3DEC 7

USER INTERFACE and PLOTTING

  • Updated plotting libraries. Faster and more stable, especially on Remote Desktop
  • New plotting paradigm. Select the object being plotted and then choose the color scheme or value to be contoured
  • Multi-threaded block plots (not done yet)
  • All quantities can now be contoured (e.g. stress and strain)
  • Most plot items include the ability to map to other coordinates and the ability to plot with exaggerated deformation
Select the object being plotted and then select either the label (group, material, material model, state, etc.) or value (displacements, stress, velocity, temperature, etc.) to be contoured.
  • Updated plotting libraries. Faster and more stable platform, especially when working with Remote Desktop
  • All quantities can now be contoured (e.g. stress and strain)
  • Most plot items include the ability to map to other coordinates and the ability to plot with exaggerated deformation to highlight large displacements in small strain models
  • Ability to reorder, copy, and paste plot items interactively

MODEL CONSTRUCTION

  • Automatic mesh generation in fully deformable blocks now uses same libraries as in Griddle
  • Build models directly from closed geometry surfaces (e.g. DXF):
    • Fill volume with tetrahedral blocks, or
    • Merge blocks to form zones within single closed surfaces
  • Cut blocks with DXF geometry
  • Create blocks from VRML files
  • Built-in voronoi block generator
  • New grid file format for importing and exporting blocks and zones
  • Convert tetrahedral blocks into zones during import. Blocks with the same group name can be merged together to form multiple zones within a single block. 2-3x faster than joining. NEW
  • Beam, cable, and pile geometry can be imported from CAD data NEW
  • Define groups using visual and property-based ranges UPDATED
DXF of a simple tunnel (left) and resulting 3DEC model (right). The model is composed of 4 blocks, each discretized into tetrahedral zones.
  • Create blocks from VRML files
  • Built-in voronoi block generator
  • Export model grids, along a plane, to UDEC
  • New grid file format for importing and exporting blocks and zones
  • Convert tetrahedral blocks into zones during import
    • blocks with the same group name can be merged together to form multiple zones within a single block
    • 2-3x faster than joining
  • Beam, cable, and pile geometry can be imported from CAD data
  • Define groups using visual and property-based ranges

JOINT MODELS

  • Three new, built-in joint models have been added:
    • Softening healing Mohr-Coulomb to improve modeling seismicity such that not all joint slip events are seismic and joint stick-slip behavior is possible
    • Bilinear Mohr-Coulomb with two different shear strength envelopes where the transition may be automatic (envelopes intersection) or specified
    • Power Law Creep to simulate the creep due to the joint gauge (infill) material

STRUCTURAL ELEMENTS

  • Structural liners, previously an option, are now included
  • More structural elements (piles, shells, and geogrids)
  • Elastic finite element blocks (20 or 28-noded hexahedra), previously an option, now included
  • Hybrid bolts add dowel segments to cable bolts to resist shearing and opening across joints
Cables around an excavated tunnel. Dowel segments are contoured by shear force.

UPDATED COMMANDS and SCRIPTING

  • Updated commands and FISH syntax that is intuitive, easy to learn, and easy to apply
  • Automatic conversion tool to translate 3DEC 5.2 data files to the updated 3DEC 7.0 syntax
    • Converted sources files are archived automatically to a local pre-conversion folder
    • Ambiguous or obsolete syntax is highlighted with recommendations
Original 3DEC 5.2 data file snippet (left) and automatically converted 3DEC 7.0 version (right). All converted source data files are automatically saved in pre-conversion folder (insert circle).
  • Documentation includes a Command and FISH mapping reference
  • Totally updated syntax for commands and FISH to make more intuitive and more consistent with other Itasca programs
  • Conversion tool to convert commands and FISH from old syntax to new syntax
  • Display of global FISH symbols as calculation progresses.
  • New variable types include: Boolean, Symmetric Tensor (e.g., stress and strain), Matrix (with built-in functions to inverse, multiply, etc.), Map (or associative array), and Structures
  • FISH <strong>foreach</strong>construct can now be used for 3DEC objects. This greatly simplifies 3DEC FISH
  • FISH functions now available for all objects including structural elements
  • Improved editor with better highlighting, visible line numbers and code folding (collapse and expand segments of code)
  • Fully integrated Python. All FISH functions also available as Python methods
  • FISH foreach construct can now be used for 3DEC objects. This greatly simplifies 3DEC FISH
Looping through all zones in a model in 3DEC 5.2 (left) and 3DEC 7.0 (right).
  • FISH functions now available for all objects including structural elements
  • Improved editor with better highlighting, visible line numbers and code folding (collapse and expand segments of code)
  • Fully integrated Python. All FISH functions also available as Python methods
  • Control 3DEC entirely using Python data files and/or using the enhanced interactive IPython console built right into 3DEC
  • IPython provides a powerful set of tools, such as:
    • GUI-based script shell
    • interactive data visualization
    • comprehensive object introspection
    • Python script parallel processing
    • robust error handling

MORE RESPONSIVE HELP

  • Documentation is now in HTML format
  • Access Help at the command prompt or within a data file [F1]
  • Access Inline Help [Ctrl + Spacebar] to auto-complete commands

AND MORE ...

  • Seismic wizard to pre-process ground waves for dynamic (option) analysis
  • Groups and extra variables for all objects, including structural elements and flow planes
  • Save files can be automatically (optionally) compressed
  • Save files will be compatible with future 3DEC versions

Latest News
  • Workshop: The “Big Five”: Numerical Modeling of Cave Mining This MassMin2020 workshop will review caveability, ground subsidence, infrastructure stability, fragmentation, and gravity flow associated...
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  • 2020 H. Bolton Seed Lecture: Open Issues about Soil Liquefaction Dr. Bruce L. Kutter delivered the 2020 H. Bolton Seed Lecture at Geo-Congress 2020 in...
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  • Webinar: Using Rigid Blocks in PFC This webinar will provide a brief overview of PFC modeling using convex rigid blocks, including...
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Upcoming Events
4 Dec
Analyses of Embankment Dams and Slopes Using FLAC
Presented by Dr. Richard Armstrong in collaboration with Itasca Consulting Group. This hands-on, virtual training course is 16 hours to... Read More
8 Mar
FLAC3D 2021 Remote Introductory Training
Three days of general feature training addressing basic concepts and recommended procedures for geotechnical numerical analysis.... Read More
22 Mar
3DEC and UDEC 2021 Remote Introductory Training
An introduction to UDEC and 3DEC for application to geotechnical analysis.... Read More