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  9. Zencrack 9.5-2

What's New in Zencrack?

Zencrack 9.5-2

The base code for Zencrack version 9.5-2 was finalised on 12 December 2025 and released in January 2026

The Zencrack 9.5-2 release is primarily an interim update with small improvements and fixes in the GUI.

It also introduces support in the Abaqus interface for use of the Q3D family of elements.

For major functionality changes in the 9.5 release branch, please refer to the What's New page for Zencrack 9.5-1.

Remeshing improvements

The following remeshing improvements are included in this version:

  • Changes to reduce sliver elements in the tet mesh close to the ring/crack plane interfaces.
  • Correction to intersection calculation for elliptic crack geometry and the mesh bounds (affecting some models in version 9.5-1).
  • Correction to remeshing of collapsed 8 noded hex elements (affecting version 9.5-1 update 2).
  • Correction to prevent remeshing incorrectly assigning embedded status to a small elliptic crack if a model is in metres.

Changes in the Zencrack GUI

The following changes are included in the Zencrack GUI in this version:

  • A new option is added to the GUI Start Screen to access the supplied examples folder.
  • The default for display of the origin triad is changed to ‘Off’ to improve rendering when a model is in metre units or is very far from the origin.
  • Change to the crack profile ‘Apply to all’ option to ensure a redraw is always carried out to show any changes.
  • Change to allow spline points and crack profile points to be resizeable when there is no mesh in the viewport.
  • Change to prevent possibility of a highly zoomed-in triad if displaying crack profiles without a mesh.
  • Change to the calculation of the size of spheres representing point and node positions.

Changes in Abaqus interface

Support is added for use of the ELECTRICAL parameter on a *COUPLED TEMPERATURE-DISPLACEMENT step. For remeshing, this means that the remeshed region is created with elements from the Q3D element family. The crack-block method is also modified to allow the use of Q3D elements.

Update of loading in the crack region is extended to allow update of loads applied to element faces via the *DFLUX option.

To help enable these changes the status value of Abaqus keywords *DFLUX, *DSFLUX, *ELECTRICAL CONDUCTIVITY, *ELECTRICAL RESISTIVITY and *SRADIATE is changed to 0 in the keyabq.dat file.

Other changes

The program and documentation are installed from a single installer into the same top-level folder with sub-folders 'program' and 'documentation'.

The ‘demos’ folder containing examples described in the Examples Manual is renamed ‘examples’ for consistency with the manual.

This release addresses one item classified as a bug:

ZENCR565Certain input definitions for load systems could result in integer overflow and negative cycle counts being reported.
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