Itasca’s finite volume (FV) approach uses the shear strength reduction (SSR) method for numerical modeling. This formulation is far superior to more traditional limit equilibrium (LE) methods and offers several advantages over finite element (FE) methods as well.
Produce mechanics-based failure mechanisms
No need to specify a range of trial surfaces in advance
Revealing failure mechanisms that were not originally appreciated—including multiple or complex mechanisms
Can model more complex ground behavior (e.g., stress-dependent material behavior, soil saturation, groundwater flow)
Enhanced judgment from seeing realistic mechanisms
Observe displacement progression
Deformations at the “failure state” are kinematically valid
Is the Service Limit State more critical than the Ultimate Limit State?
Ability to use advanced exploration data, such as CPTu
Ability to use advanced monitoring data (including rate effects)
Using the output and visualizations to help describe risk for strength, permeability, and deformation problems
Better understanding of project risk/confidence for decision-making
Evaluation of the effectiveness of proposed designs
In addition to continuum modeling, Itasca also offers engineering analysis using its DEM software—UDEC and 3DEC for jointed and blocky rock, and PFC for brittle intact rock, granular, or synthetic rock mass (SRM) engineering as well as for fundamental research.
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Upcoming Events
23Sep
Getting Started with FLAC2D/FLAC3D
Live Online Introductory Training Course.
September 23-24, 2025....
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14Oct
Getting Started with 3DEC
Live Online Introductory Training Course.
October 14-15, 2025...
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