Comparing Itasca’s Approach to Limit Equilibrium

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?
  • Incorporate ground support
    • Full soil-structure interaction (beams, sheet pile walls, piles, liners, anchors, etc.)
    • LE can’t address deformable structures fully
    • Create a safety map (FoS contours)
  • Apply to complex sites and issues
    • 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.

Latest News
  • Introducing IMAT: Transforming Mining Analysis Solutions Introducing IMAT: Revolutionizing mining analysis with advanced geotechnical modeling and seismic data integration....
    Read More
  • ITASCA Unveils XSite 4.0: Advancing Hydraulic Fracturing Simulation ITASCA announces the launch of XSite 4.0, a groundbreaking advancement in hydraulic fracturing simulation software....
    Read More
  • ITASCA Congratulates the Winners of the 2024 PETER A. CUNDALL AWARD Congratulate to those who were selected for the 2024 PETER A. CUNDALL AWARD for their...
    Read More

Upcoming Events
26 Aug
FLAC3D V9.1 and Griddle V2.0 2024
... Read More