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Setup Analysis
Set up your model for analysis.
Materials
Use the Material tool to associate predefined or user-generated materials with the model's parts and sets.
Create Materials
Create new materials and define their properties.
Fit a Curve by Estimating UTS
An empirical formula can be used to estimate SN/EN data from ultimate tensile strength (UTS) and Young's modulus (E).

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What's New
View new features for HyperLife Crack Growth 2026.
Get Started
Learn the basics and discover the workspace.
Tutorials
Discover HyperLife Crack Growth functionality with interactive tutorials.
Setup Analysis
Set up your model for analysis.
- Crack Growth Fatigue Module
  Use the fatigue module to configure strain life fatigue evaluation necessary for Auto Hotspot detection.
- Materials
  Use the Material tool to associate predefined or user-generated materials with the model's parts and sets.
  - Assign Materials to Parts
    Assign pre-existing or user-generated materials to the model's parts, components, and element/node sets.
  - Create Materials
    Create new materials and define their properties.
    - Fit a Curve by Estimating UTS
      An empirical formula can be used to estimate SN/EN data from ultimate tensile strength (UTS) and Young's modulus (E).
    - Other Methods for Fitting a Curve
      The following methods require certain parameters other than UTS to define the SN/EN curve.
  - Import and Export Material Databases
    Save or load a list of created materials.
- Load Maps
  Use the Load Map tool to create multiple channels (load histories) which are then paired with subcases/loadsteps to create the fatigue events.
- Hotspots
  Nodal hotspot are used to assign crack properties.
Evaluate
Run the model and view results.
Results Data
Direct integration of native results readers into HyperLife Crack Growth allows you to perform results visualization on the model.
Systems
Create and assign systems.
HyperLife Crack Growth Overview
The crack growth solver in HyperLife is based on a method developed by Dr. Glinka.topics/fatigue/cg_references_r.html#cg_references_r__growing_crack_load_shedding_r_fn_jrg_2m5_5bc topics/fatigue/cg_references_r.html#cg_references_r__growing_crack_load_shedding_r_fn_vpk_2m5_5bc
Manage Files and Data
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Working with Entities
Learn how to manipulate entities.

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Fit a Curve by Estimating UTS

An empirical formula can be used to estimate SN/EN data from ultimate tensile strength (UTS) and Young's modulus (E).

From the Assign Material dialog, click the My Material tab and select your created material.
Select Estimate from UTS as the input method.
Click to view the model description.
Enter a value for UTS and Elastic modulus.
Click Estimate.

EN Properties

Figure 1. Estimated EN Data from UTS and E**

** Source: Anton Baumel and T. Seeger, Materials Data for Cyclic Loading, Elsevier, 1990

$S f / {σ^{'}}_{f}$: Fatigue strength coefficient.
$b$: Fatigue strength exponent.
$c$: Fatigue ductility exponent.
$E f / {ε^{'}}_{f}$: Fatigue ductility coefficient.
$N p / n^{'}$: Cyclic strain-hardening exponent.
$K p / K^{'}$: Cyclic strength coefficient.
$N_{c}$: Reversal limit of endurance. One cycle contains two reversals.
$S E_{e}$: Standard Error of Log(elastic strain).
$S E_{p}$: Standard Error of Log(plastic strain).

Figure 2. EN Curve in Log-Log Scale