The Itasca Constitutive Model for Advanced Strain Softening (IMASS) has been developed to represent the rock mass response to excavation induced stress changes.
IMASS uniquely utilizes two softening (or residual) yield envelopes to represent the damage around an excavation, slope, or caving process by accounting for the progressive failure and disintegration of the rock mass from intact, jointed, and/or veined rock to a disaggregated, bulked material.
Now Available as an Option
IMASS is available as an optional constitutive model for use in both FLAC3Dand 3DEC(version 7.0 or latter) and is and is sold as a monthly or annual lease.
Itasca Celebrates 40 Years Itasca is celebrating 40 years of solving geomechanical and hydrogeological challenges through engineering and computer... Read More
Stability and Stress-Deformation Analyses of Reinforced Slope Failure at Yeager Airport This paper describes the material properties along with the inverse limit-equilibrium and permanent deformation analyses... Read More
Computers and Geotechnics: Scott Sloan Best Paper Award for 2019 Itasca is pleased to congratulate Dr. Branko Damjanac and Dr. Peter A, Cundall for their... Read More
FLAC 2021 Online, Live Introductory Training FLAC is numerical modeling software for advanced geotechnical analysis of soil, rock, groundwater, and ground support in two dimensions...