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FAQ: ITASCA Software 9.6 with Automatic Remeshing for Civil and Mining Modeling
TL;DR
ITASCA Software's FLAC2D v9.6 gives engineers a competitive edge by enabling faster, more stable simulations of large deformations for superior risk assessment and design efficiency.
FLAC2D's automatic remeshing rebuilds the mesh when strain thresholds are exceeded, transferring data to maintain continuity and ensure accurate modeling of large progressive deformations.
This technology helps engineers design safer mines and civil structures by improving stability analysis, potentially preventing failures and protecting communities and the environment.
ITASCA's update lets engineers simulate massive ground movements like tunnel collapses with automatic mesh rebuilding, using advanced models like the 'gold standard' for salt creep.
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The main new feature is fully automatic remeshing in FLAC2D, which automatically rebuilds the mesh in regions that exceed user-defined strain thresholds during large deformations, maintaining simulation continuity by transferring data like stresses and displacements from the old grid to the new.
Automatic remeshing addresses the longstanding challenge where traditional fixed grids can become excessively distorted during large deformations, causing simulation failure or loss of accuracy. It enables stable, accurate modeling of very large deformations, allowing reliable simulation of complex phenomena involving massive strain.
As the ground or structure in a FLAC2D model deforms during large displacements, excavation, or collapse, the mesh is automatically rebuilt in regions that exceed user-defined strain thresholds. Data like stresses and displacements are transferred from the old grid to the new, maintaining simulation continuity.
Automatic remeshing saves valuable time and reduces effort for engineers during analysis of the complete evolution of a structure from stability to large-scale movement, leading to more efficient planning and design. It maintains mesh quality, adapts to evolving geometry, and improves solution accuracy during large deformation.
Mining applications include modeling subsidence, progressive failure of open pits, backfill stability, or tunnel, stope, or cavern collapse. It helps maintain mesh quality and improve solution accuracy during large deformation, including the impact of ground pore pressure, supporting more robust risk assessments in complex geomechanical environments.
In civil engineering, automatic remeshing is ideal for gaining the full picture of excessive deformations and their effect on construction, safety, and serviceability, particularly when differentiating between Ultimate Limit State (ULS) and Serviceability Limit State (SLS). It benefits analysis of active slope failure or instability of tunnel faces.
Version 9.6 includes several other new or enhanced features: a Structural Concrete Constitutive Model for realistic soil-structure interaction, the Munson-Dawson Creep model for high-fidelity salt mechanics, and Circular Shell Generation for automating the generation of circular shell elements connected to piles.
Jim Hazzard is the ITASCA Software Manager who explained that remeshing addresses the longstanding challenge where traditional fixed grids can become distorted during excessive deformation, causing simulation failure or loss of accuracy. He stated that FLAC2D's new remeshing logic enables stable, accurate modeling of very large deformations.
ITASCA Software version 9.6 was released on January 30, 2026.
You can visit the ITASCA Software website at https://www.itascasoftware.com or the specific product page for FLAC2D at https://itascasoftware.com/products/flac2d/ for more information.
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