Continuum Modeling for Geomechanics in 2D
Unlock unparalleled simulation capabilities with intuitive tools designed for precision and efficiency with FLAC2D. Ideal for 2D soil, rock, concrete analysis, structural ground support, and groundwater flow.
FLAC2D
What’s new in the latest release of FLAC2D?
Model Dynamics with Precision
FLAC2D v9.6 introduces automatic remeshing to maintain high-quality grids during extreme movement. As deformations occur, the software automatically rebuilds a high-quality grid, ensuring accuracy when modeling extreme movements. This saves time and provides a complete picture of failure—from initial instability to final collapse.
Reduce Risk with Rapid Blasting Tools
Ensure safety and efficiency with V9.6’s latest blasting modules. From predicting rock fragmentation and vibration distances in the Bench Blast Design tool to analyzing energy distribution and crushing zones with the Explosive Rock Interaction tool.
(BETA) Next-Gen Simulation: Seamless MPM Integration
FLAC2D now integrates with MPoint2D, ITASCA’s new MPM solver for extreme deformation. This hybrid workflow overcomes conventional large-strain limitations by balancing accuracy with performance. Models can utilize a mix of zones and material points or trigger an automatic transition to material points in regions experiencing high strain.
What is FLAC2D?
FLAC2D is a powerful and versatile software tool designed specifically for geotechnical engineering, allowing engineers and researchers to simulate complex two-dimensional problems involving soil and rock mechanics. With its advanced numerical modeling capabilities, FLAC2D employs the finite difference method to analyze stress, strain, and deformation in a wide variety of materials and conditions.
What sets FLAC2D apart is its extensive library of constitutive models designed for various forms of material behavior, from elastic to plastic and viscoelastic. Additionally, FLAC2D’s capability to model dynamic motion provides engineers with a powerful tool for assessing the implications of dynamic loading and events on structures and earth materials. The software helps in understanding critical aspects such as shear strength, stability under loading conditions, and potential failure mechanisms in response to dynamic effects. This dynamic aspect is crucial in ensuring the safety and performance of infrastructure in environments subject to earthquakes or other forces that induce rapid changes.
In a fast-paced world where precision is crucial, FLAC2D empowers engineers to make informed decisions confidently, ensuring the safety and integrity of their projects.
Why Choose FLAC2D?
FLAC2D offers robust simulation capabilities and proven reliability for effectively tackling complex geotechnical challenges with precision and efficiency.
Dynamics
FLAC2D’s advanced dynamic analysis capabilities make it a premier choice for simulating seismic events and other dynamic loads on geotechnical structures.
Powerful Computing Capabilities
Run two instances simultaneously and achieve simulations up to 5x faster than equivalent 3D models.
Ease of Use
Sophisticated features, including command auto-completion and efficient model construction tools, simplify the workflow.
Advanced Analysis Options
Robust capabilities for large-strain simulation, multiple failure mechanisms, and dynamic analysis enhance modeling precision.
Fast and Responsive Simulations
Optimized solutions and multi-threading provide quick, accurate results, even for complex simulations.
Flexibility and Customization
Includes extensive scripting options in Python and FISH, along with 41 built-in constitutive models, enabling tailored modeling experiences.
Comprehensive Support for Various Industries
Adaptable for applications in geotechnical engineering, mining, and construction, meeting diverse project needs.
Powerful Scripting
Empower your simulations with FISH and Python scripting, unlocking endless possibilities for model customization, advanced visualization, and innovative physics integration.
FLAC2D Industry Solutions
Explore FLAC2D in action as it tackles diverse geotechnical challenges from different industries with precision and innovation. Discover how our solutions empower industries to achieve efficient, reliable outcomes in real-world applications.
Automatic factor of safety contours for a mine slope.
Top: Min tailings dam constructed in stages. Bottom: Max shear strain increments after an earthquake.
Post-peak strength behavior of a mine pillar without surrounding backfill.
A wharf built into a slope is composed of beam and pile structural elements. Max shear strain incremental contours and horizontal displacement of wharf are shown after being subjected to an earthquake.
Concrete diaphragm wall model showing horizontal displacement contours, total displacement vectors, bending moments and horizontal displacement along liner, plus bending moment in support struts.
Elliptical supported tunnel developed in a series of excavation and support sequences.
FLAC2D Add-on Options
Expand your FLAC2D software capabilities with our range of add-on options, designed to tackle diverse engineering challenges effectively. Explore our selection of options to customize your FLAC2D experience.
Dynamics
Enhance simulations with dynamic analysis for earthquake engineering, soil liquefaction, and more. Includes robust boundary conditions and fast model run times.
- Customizable boundary conditions (acceleration, velocity, stress waves)
- Soil-structure interaction and thermal coupling
- Dynamics Wizard for preprocessing
- Maxwell damping for fast simulations
- Multiple dynamic and liquefaction models
$69 / month or $828 / year
Thermal
Simulate heat transfer with conduction and advection models. Ideal for geothermal and nuclear waste applications with variable boundary conditions.
- One-way coupling to mechanical stress and pore-pressure calculations
- Four thermal material models
- Efficient solvers for rapid model run times
- Hydration-Drucker-Prager model for dynamic material adjustments
$69 / month or $828 / year
Creep
Study time-dependent material behavior with viscoelastic and viscoplastic constitutive models. Applications include oil reservoirs and deep tunnels.
- 10 customizable creep models
- Versatile for mining and compressed-air energy storage
- Customization via C++ scripting
$69 / month or $828 / year
User-Defined Module (UDM)
Develop custom material models tailored to specific project needs using C++. Enhance simulation flexibility with downloadable templates.
- Modify existing or create new constitutive models
- Access to ITASCA’s UDM Library
- Ideal for specialized analysis
Free with any license
Hear from Satisfied Users
Selected by World-Class Organizations
Software Support and Education Hub
We’re here to help you maximize the potential of ITASCA software and tackle any geotechnical challenge with confidence. Explore the sections below to get started.
Free FLAC2D Training Courses
Common Questions from Teams like Yours
FLAC2D is a two-dimensional geotechnical analysis tool used to study soil, rock, and support behavior in civil engineering projects. It is commonly applied to excavation, slope stability, retaining structures, embankments, foundations, and underground works where plane-strain behavior is a good approximation.
FLAC2D is especially useful for evaluating deformation, stress redistribution, seepage effects, and stability in projects such as cuts, tunnels, dams, levees, retaining walls, and deep foundations. It is a strong choice when engineers need to understand how ground conditions and construction stages influence performance over time.
FLAC2D helps engineers simulate staged construction, loading, groundwater effects, and soil-structure interaction in a single model. This makes it easier to compare design options, assess risk, and predict how a structure or excavation may behave before work begins.
It is easy to use, and with its built-in sketch capability, engineers can quickly draw the geometry they want to model and be working in minutes.
FLAC2D also becomes easier to adopt because it includes free product training on YouTube and more than 80 example models that show common workflows in practice. Those examples are especially helpful for excavation, slope stability, retaining walls, embankments, foundations, and seepage-related studies. Users can learn by adapting proven models rather than starting from scratch.
FLAC2D can be coupled with PFC2D for continuum modeling. It can also be coupled with MPoint2D, a material point method solver, to model extreme deformations and highly nonlinear behavior.
Ready for the Next Steps?
Explore our FLAC2D licensing options & pricing plans
Find the Right Solution for your Modeling Challenge
If you’re exploring the best solution for your project, you can find the right software, talk with an expert, request a tailored quote, or download a free demo to try FLAC2D firsthand.