SIGMA/W is a powerful finite element software product for modeling deformation and stability in the civil and mining sectors. SIGMA/W analyses may range from simple linear elastic imulations to soil-structure interaction problems with nonlinear material models.

• Stress History; In Situ stresses can be established using gravity activation, field stresses, or the K0 procedure, which consider the volumetric water content function to determine effective stresses in the unsaturated zone. Pore-water pressures can be defined using a variety of sources.
• Coupled Consolidation; The coupled stress and pore-water pressure formulation can handle complex analyses with saturated or unsaturated soils. This is useful for construction sequences involving fill placement, excavation, and soil-structure interaction.
• Load-Deformation; Unloading or loading activities can be simply and accurately modelled, including submerged fill placement, dam and tailings embankment construction, deep excavations, and open pit mine construction. Pore-water pressure changes can be incorporated by defining the initial and final water conditions.
• Stress Redistribution; The stress redistribution algorithm is capable of doing stress correction for any material model with a failure criteria. Strength Reduction Stability is also available as an alternative to the limit equilibrium stability method.

SIGMA/W comprehensive feature set;

• Comprehensive incremental stress-strain formulation •
• Rigorous stress-update algorithm for handling non-linear material models
• Coupled stress and pore-water pressure formulation
• Straightforward construction sequence simulation
• Multiple options for in situ stress definition
• Saturated-unsaturated formulation
• Comprehensive constitutive model list including non-linear soil and rock material models
• Estimation routines for typical material properties
• Complete range of boundary conditions
• Expansive structural element library
• Stress redistribution analysis
• Automated strength reduction stability
• Integration with SLOPE/W