What's New

View new features for HyperLife 2023.1.

Altair HyperLife 2023.1 Release Notes


  • Key enhancements to spot weld fatigue analysis.

New Features

Support of transient loading for spot weld fatigue
Spot weld fatigue with 1D elements is extended to transient loading. The feature supports both .h3d and .op2 result formats as input.
Contouring sheet damage in spot weld fatigue
When SPTFAIL = ALL in material assignment, life and damage results of both sheets and nugget will be reported separately.
Default Stress Life curve for spot weld fatigue
HyperLife supports the default amplitude-based SN curve for spot weld fatigue at stress ratio equal to 0.0.
Rainflow and Damage Matrix for sheets and nugget in spot weld fatigue
HyperLife supports display and export of Rainflow matrix for sheets and nuggets separately.


  • Rainflow output (RFOUT) of spot weld fatigue to report corrected stress amplitude
    Rainflow file from spot weld fatigue analysis will also output corrected stress amplitude along with stress amplitude, mean stress and damage for every cycle.
  • Contour of life/damage will be specific to the SPTFAIL selection in spot weld fatigue.

Known Issues

The following known issues will be addressed in a future release as we continuously improve performance of the software:
  • Inconsistency in reporting damage/rainflow matrix for Brown-Miller damage model in Strain-Life multiaxial analysis.

Resolved Issues

  • The issue concerning sheet damage with spot weld fatigue modeled with hexahedron (hexa) elements is resolved.
  • Wrong warning shown when beam elements from OP2 results are used for spot weld fatigue is resolved.
  • The issue pertaining to zero results on using Brown-Miller damage model in Strain-Life multiaxial analysis is resolved.
  • User warning reported when sheet thickness or nugget diameter is set to zero in spot weld fatigue.

Altair HyperLife 2023 Release Notes

New Features

Output Hotspot Sets
This feature enables you to output hotspot sets to a text file that you can import into HyperLife and HyperView. There are new user input options on the Evaluate tool under Advance Options > Output > Hotspots. You can input the number of hotspots, the threshold ratio, and the damage limit.
Range Envelope as a Configuration on a Load Map to Create a Stress Range
The Range Envelope option has been added to the Load Map tool as an addition to the Superposition and Sequential configurations. Use this new feature to create a stress range from selected loadcases while accounting for maximum and minimum stress points within the considered envelope of loadcases. This feature is useful when there is no external load history input available and you intend to create a stress range from the available stress levels in the loadcases.
Ribbon Hints
Ribbon hints have been added to help identify tools that have multiple pick targets or open a secondary ribbon. They are small indicators that appear in the ribbon between a tool’s icon and label. The number of dots represents the number of pick targets in a tool, including some that are hidden until hovering over the tool.
Figure 1.

To control this option, go to File > Preferences > Common > Application > Show ribbon hints.


  • During Evaluate > Run, if a user-defined material is not found in the assigned user-defined material file (.csv/.xml), the run errors out with a warning added to the log file. Additionally, a Status Bar message is displayed upon importing the run setup XML if the material is not present in the location specified.

Resolved Issues

  • For nodal evaluation, the result files with GPSTRESS (by PROP) output is supported.
  • The event wise results showing zero damage for Random Fatigue with PSD results.
  • Issue with Scaled life values input not displaying in the HyperLife GUI upon importing an XML file.
  • User warnings are added when clicking Run/Export to prompt you if the Yield strength is not greater than zero when SODERBERG mean stress correction is present.
  • Issue with range based SN curves and Spot Weld fatigue.