May 2024

The release notes for May 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.
  • It is now possible to consider Cavitation (only available for u-p-sat elements yet)
  • Stabilised 'u6p6' elements now available, see u-p elements

• 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.

• Constitutive models

  • The HCA implementation now allows to consider different definitions of the cyclic history variable \(g^A\).

Manuals:

• Added documentation for FPL-Stabilisation
• Added benchmark for Hertzian Contact in 3D
• Added documentation for Bishop effective stress
• Revised installation instructions

General modifications:

• Tangential stiffness factor is now five times lower in case the default stiffness, which depends on the material stiffness, is used

• Some Abaqus-specific keywords such as *Heading or *Preprint can now be read. In addition, some of the most common 3D element type names of Abaqus are now automatically (internally) changed to the corresponding element type names used in numgeo, which are C3D20/C3D20R = U20-SOLID , C3D8R = U8-SOLID-3D-RED and C3D8 = U8-SOLID-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
• Bugfix of 3D contact in case contact points have a large distance and should not be considered
• Bugfix for calculation of tangential stiffness factor being too low for elements with larger number of integration points