User-Defined Constitutive Models (UDM)

Itasca is pleased to provide a collection of selected User Defined constitutive Models (UDM) for Itasca continuum software (FLAC, FLAC3D, UDEC, and 3DEC). The usage of the UDMs available at this site is free of charge. However, the C++ UDM option for the corresponding Itasca software product, available for purchase, is required.

Itasca clients interested in contributing their own UDMs are invited to submit them.

Users are invited to rate each UDM on a scale of 1 (poor) to 5 (excellent). You may vote for each UDM version once only. Please also feel free to post comments or suggestions on the user forum at the bottom of each UDM web page.

Please note that the UDMs are provided for your convenience, as is, and Itasca takes no responsibility for the correctness or your usage of the UDMs.

Learn more about our software products and consulting services.

UDMs

Model Name Model Version Category Product User Rating Model Type
NTUA-Sand 2
  • sand
FLAC3D 5.00
4.5
Continuum
NTUA-Sand 2
  • sand
FLAC 8.00
4.5
Continuum
NTUA-Sand 2
  • sand
FLAC3D 6.00
4.5
Continuum
PM4Sand 3
  • sand
FLAC 8.00
4.5
Continuum
Wang3D 1
  • sand
FLAC3D 5.00
2
Continuum
MODHB 06/14/2012
  • rock
FLAC3D 5.00
1
Continuum
JointedRock 10/15/2012
  • jointed rock
FLAC3D 5.00
4.5
Continuum
Dames & Moore 06/12/2013
  • sand
FLAC3D 5.00
3
Continuum
UBCHYST 5d
  • sand
FLAC 8.00
5
Continuum
UBCSAND 904aR
  • sand
FLAC 8.00
2.5
Continuum
SANISAND (Dafalias-Manzari 2004) 2.1
  • sand
FLAC3D 6.00
4.5
Continuum