Altair HyperLife 2022.3 Release Notes

New Features

Stress Gradients Correction
Stress gradients correction has been added based on FKM guidelines. It is supported for both shells and solid elements.
For solid elements, the stress gradients correction is only available with Nodal Evaluation. For shell elements, the stress gradients correction is only available with Elemental evaluation.
The Stress gradients correction is supported for SN/EN Uniaxial and Multiaxial with Time Series loading. It is currently not supported for FOS, Weld, Transient, and Vibration Fatigue analyses.
To activate Stress gradients correction based on the FKM guideline method, Stress Gradient should be set to FKM Guideline in the SN/EN tool. The equivalent stress method to calculate stress gradient should be specified.
Limitations: for solid elements, stress gradients evaluation currently uses first layer only along depth for the gradient calculation. Due to this, relative stress gradients are calculated incorrectly for models with element size greater than 1 mm in thickness direction. This limitation will be addressed and enhanced in the upcoming release.
Gate Support for Load History Compression in Modal Superposition and Transient Response Loading
Gating option to remove small cycles (defined by a gate value) and intermediate points is supported for Modal Superposition and Transient response loading. You can enter the Max gate range in the Load Map tool.
Damage and Scaled Life Output for All layers
Damage and Life output is enabled for all the layers in a shell model. You can enable this option in the Evaluate tool > Advance Options > Output > Output All Layers.
Output for Random Response Analysis (RMS Stress) with FRF and PSD Stress Loading
RMS Stress output is enabled by default while performing Random Fatigue analysis (with FRF stress and PSD Loading). You can contour RMS stress in the Results Explorer.


Updated Random Fatigue with FRF Stress and PSD Loading Workflow
Refreshed and enhanced workflow for Random Fatigue with FRF stress and PSD loading. User options are provided to scale the Complex stress with input real and imaginary coefficient.
Plot Model Superposition Results
Model Superposition results can be plotted on HyperView with FEM file and HWASCII file combination.
Set Cyclic Limit of Endurance to 1000
Cyclic limit of endurance (NC1) can be set to 1000. The earlier limitation of NC1 > 1000 is has been addressed.

Resolved Issues

  • Block load import and export issue on Load Map tool has been resolved.
  • The issue with Safety Factor reported as Damage in callouts has been resolved.
  • The issue with Modal Superposition session file (HLF file) not retaining the Events and Damage matrix has been resolved.

Known Issues

  • There is a known issue with estimate SN curve from UTS in the Material tool where the Stress type = Range is not being updated and the tool considers it as Amplitude based curves. The input curve is an Amplitude based curve. This issue will be fixed in the upcoming release.
  • The default SN curves provided for Spot Weld are supposed to be Range based curves. The Material tool plots and inputs it as Range based curves. Considering this, recreate the material as Range based while using this curve. This issue will be resolved in the upcoming release.
  • The File Open dialog doesn’t load DYNA – D3PLOT files. As a workaround, drag-and-drop the file into the modeling window. This issue will be addressed in the upcoming release.
  • With Modal superposition as the loading type, there is a known issue where Max Gate Range is deactivated with manual Event creation and adding user selected modes. This issue will be fixed in the upcoming release.