2024

April 2024

The release notes for April 2024 are:

Features:

• Elements

  • Is is now possible to define the stabilisation parameter \(\alpha\) for stabilized u-p elements for saturated soils and partially saturated soils via keyword.

• Procedures

  • It is now possible to scale the critical time increment in explicit dynamics as explained in the step definition.
• Load
  • Added dampers to connector elements in order to use them as spring-damper elements.

Manuals:

• Added documentation for FPL-Stabilisation
• Added benchmark for Hertzian Contact in 3D

Resolved bugs:

• Output variable CON_F is now written for all nodes of the node set used in the Connector element definition, not just for the first node of the set

March 2024

The release notes for March 2024 are:

General modifications:

• Revised parts of the code that required the use of \heap-arrays:0 for large FE models on Windows. Performance gains by a factor of up to 5 are observed for large models with the new version of numgeo.

Features:

• Constitutive models
  • SANISAND-MFs: All parameters are now available in the interface of the model, including the ones whose default values rarely need to be changed.

Manuals:

• Revised installation instructions for Windows
• Added documentation for Sanisand-MSf

February 2024

The release notes for February 2024 are:

Features:

• Procedures

  • It is now possible to automatically transfer linear interpolated brick elements with 8 nodes to tri-quadratic interpolated brick elements with 27 nodes
  • Mixed Implicit/Explicit time integration

• Elements

  • Explicit u-U elements, see Reference Manual
  • Stabilized u-p elements for saturated soils, see Reference Manual
  • Stabilized u-p elements for partially saturated soils, see Reference Manual

• Constitutive models

  • The HCA implementation now allows to consider multiple strain amplitudes during the high-cycle phase. Length of statev vector reduced to save some RAM.
  • Reimplementation of the Hypo+ISA model
  • Added centered-step-size approximation of the partial derivative of the degree of saturation w.r.t. the capillary pressure \((\partial S^e)/(\partial p_c)\)
  • New model: SANISAND-F
  • New model: SANISAND-MFs

• Contact

  • Special check for non-converged contact points allowing for better handling of contact points with large distance
  • Improved handling of kinks in surfaces

• Loads

  • Reduced integration order of load for reduced integrated elements

Resolved bugs:

• Bugfix in transparent boundary conditions for 3D elements
• Fixed bug if shell/batch script not existing for user amplitude and user contact
• Fixed bug in the windows version of the user load file

General modifications:

• Improved numerical stability in infiltration processes
• Added statically linked numgeo version
• Default convergence controls are now of type dof-based, see Reference Manual or the Theory Manual

Corrections Keywords Manual:

• Updated default values for maximum number of iterations and convergence criteria