OGS-H2M-MAT

ogs-h2m-mat π-plane view of Desai plastic model accounting for effects of material properties

Project title: 

Development and implementation of constitutive material models for
clay-rich materials based on the coupled H2M concept in OpenGeoSys

Project description: 

Aim of the project is the development of a comprehensive constitutive model for describing the material behaviour of claystone (Opalinus Clay) being developed on behalf of the Federal Institute for Geosciences and Natural Resources (BGR). The new material model will be implemented and tested in the OpenGeoSys software platform – with the following key features (TL – projects milestones):

  • Various hydraulic-mechanical coupling options via material models characteristic value functions (TL1 and TL6)
  • Mechanical plasticity with hardening and softening (TL2)
  • Mechanically anisotropic plasticity (TL3)
  • Mechanical non-linearity (TL4)
  • Mechanical dilatancy/damage models (TL5)
  • New material models will implemented in MFront (as the mechanical material interface to OGS)

In addition, methods are being developed and implemented (TL7) for

  • Automation of numerous simulation runs via workflows
  • Automated evaluation of simulation runs via OGSTools functions (Python extension
  • of OGS)
  • Methods for parameter identification of complex material models

The project is being developed in close and constant consultation with BGR. This involves, among other things, the selection of test examples, integration into the DECOVALEX 2027 project, and issues relating to software development and provision for the BGR (including hardware configurations).

The material models are to be implemented in both OpenGeoSys version 6 (currently 6.5) and compared for verification purposes to OGS 5.8.