From Yade

Constitutive laws

This page should grow to give overview of all constitutive laws in Yade. The purpose is twofold:

  1. Names of respective classes do not say much and it seems that lot of code is duplicated; should improve orientation in material models available
  2. Not all laws are in the same development stage. Some of them are well validated while others are purely experimental. Users should quickly find out which ones are safe to use in this table.

Yade users are strongly encouraged to choose one of the green laws unless a reason exists to decide otherwise.

Green Actively used and maintained without known bugs. Safe to use.
Yellow In developement. Could be functional but may be subjected to frequent changes and bugs.
Red Orphan. Though possibly useful, the code has no identified maintainer. The help from mailing list will be limited and bugfixes may never come. For prepared users.

Class description dev. status validated publications example script maintainer(s) active users
Law2_ScGeom_FrictPhys_CundallStrack The traditional Cundall's linear elastic-plastic law. This law has three parameters : tangential stiffness, normal stiffness, and friction coefficient - it modelizes dry contacts (no tensile force allowed). mature yes (>10 papers) e.g. Scholtes2009c, Chareyre2012a Bruno Chareyre >20
Law2_ScGeom6D_CohFrictPhys_CohesionMoment An augmented version of Law2_ScGeom_FrictPhys_CundallStrack with cohesion and torques at contacts. Creep is optional. mature yes Bourrier2013 Bruno Chareyre F. Kneib
Law2_ScGeom_MindlinPhys_Mindlin The non-linear elastic Hertz-Mindlin no-slip solution contact law. The law also allows for rolling resistance and non-linear viscous damping. mature yes Modenese2012b Chiara Modenese C. Modenese, C. Jakob
Law2_ScGeom_CpmPhys_Cpm model for concrete mature no Smilauer2010b examples/concrete Václav Šmilauer, Jan Stransky Jan Stransky
Law2_ScGeom_WirePhys_WirePM A contact law for steel wires which is defined by a piece-wise linear stress-strain curve. The contact law considers tensile forces only. mature yes Thoeni2011, Bertrand2008 WireMatPM/ WireMatPM/ Klaus Thoeni K. Thoeni
Law2_ScGeom6D_NormalInelasticityPhys_NormalInelasticity Contact law used to simulate granular filler in rock joints including cohesion, moment transfer and inelastic compression behaviour. mature yes Duriez2009, Duriez2011 Jérôme Duriez J. Duriez
Law2_ScGeom_ViscElPhys_Basic Visco-elastic contact law which supports explicit parameter input (Kn, Ks, Cn and Es) and implicit (contact time, restitution coefficient). mature yes Pournin2001 Many scripts in examples/-directory, grep for ViscElPhys there (, etc.). Anton Gladky -
Law2_ScGeom_ViscElCapPhys_Basic Extended version of linear viscoelastic model with capillary parameters - - - - Anton Gladky -
Law2_ScGeom_JCFpmPhys_JointedCohesiveFrictionalPM Elastic contact law with cohesion and joints for fractured rock modelling. mature yes Scholtes2012, Duriez2016 in folder jointedCohesiveFrictionalPM Luc Scholtes, J. Duriez -
Law2_CylScGeom_FrictPhys_CundallStrack Similar to Law2_ScGeom_FrictPhys_CundallStrack but adapted to interactions between spheres and chained cylinders. in development more or less not yet Bruno Chareyre, François Kneib B. Chareyre, F. Kneib, I. Olmedo
Law2_CylScGeom6D_CohFrictPhys_CohesionMoment Similar to Law2_ScGeom6D_CohFrictPhys_CohesionMoment but adapted to interactions between spheres and chained cylinders. in development no not yet François Kneib, Bruno Chareyre B. Chareyre, F. Kneib, I. Olmedo
Law2_ScGeom6D_InelastCohFrictPhys_CohesionMoment Inelastic contact law with cohesion, twist and bending. - no - - Ignacio Olmedo, François Kneib -
Law2_ScGeom_ViscoFrictPhys_CundallStrack Generalized Maxwell model of visco-elasto-plastic interactions (2 springs and 2 dashpots for each force component). in development no - - Bruno Chareyre B. Chareyre
Law2_ScGeom_LudingPhys_Basic Cohesive contact model - more or less Luding2008, Singh2013 Anton Gladky (coded) -
Non-ScGeom laws