Fatigue Design + Evaluation Committee of the SAE
Experimental Web Site at the University of Waterloo

The materials presented here are NOT SAE official documents, and are only meant as working documents, with the usual working document errors. The material should not be used for any other purposes except research.

The FD+E Committee is part of the Society of Automotive Engineers : SAE Homepage

New, somewhat:

• Jul 12 2024
  Cyclic Mean Stress Relax Database
• Feb 03 2024
  Stainless 17-4PH, 17-7 and 15-5PH test data
• Nov.30 2023
  Changes in initial Residual Stress due to fatigue cycling (part of Fatigue Tutorial) (1Mb pdf)
• Nov.28 2023
  Case Studies: Brad Cook, TBar fatigue life analysis

How to do a Fatigue Analysis

• The Short Version
• A Fatigue Tutorial (the long version)

Material Fatigue Curves and Calculations

• F.D.E. Material Database Index
  
  
• AISI Bar Fatigue Database
  
  
• Fatigue Crack Prop. da/dN Display Steels
  
  
• Cyclic Mean Stress Relax Database Steels
  
  
• Grey Iron Phase Diagram Generator
  
  
• Roll-your-own Neuber Stress to Local Stress-Strain Simulations :  
  HSLA-350,   A36_steel,   A36HAZ_steel,   A356,   7075T6xx,  

• Roll-your-own Cyclic Strain Control Simulations:  
  HSLA-350,   A36_steel,   7075T6xx,   Al-Si,   alum_319,   A356,   L99=A356,  
  GGG60,   Fe_D4512,   AZ91ET6,   AZ91-T4,   Weld_Metal

Load Histories:

• Load History Database Index

Stress Raisers, Notches and FEA

• Accounting for Notches and Other Geometric Effects

Articles:

• List

Fatigue Case Studies and Calculations

• Fatigue Life Test/Simulation Case Studies

OpenSource (GPL license) Software:

• Crack Propagaton Software with Material Memory Accounting. (local source)
  Stress Intensity and FAD Equations based on BS7910
• Crack Propagation Software with Material Memory Vers. 1 (github source)
  Stress Intens. per BS7910 rules, single deltaK vs da/dN line input
  
• Crack Propagation Software with Material Memory Vers. 2 (github source)
  Vers. 2 adds multiple R-ratio lines. Aug.2020
  
  
• Stress-strain Simulation for Variable Amplitude Input
  Uses Strain(as from a strain gage) peak-valley history as input.
  Accounts for material memory and uses Cyclic Stress-Strain curve
  for shape of stress strain path.
  
• smallCycleFilter.f.txt vers_1.62
  Program to filter out noise/small cycles and pick peaks to
  create a Peak-Valley sequence history: Source code
  
  (Corrected bug Sep.28 2014)
  
• pdrain.f Rainflow Cycle Count Program Source code: pdrain.f vers-1.1 (at Github: Click on "Raw" to download")
  
• saefcalc2.f Fatigue life calculation program using Rainflow input: (at Github: Click on "Raw" to download")
  
• makeRepSaefcalc2 bash script to create report from saefcalc2 (at Github: Click on "Raw" to download")
  
• Digital Curves proposal
  
• Plot compare fatigue datafiles (plotStrainLife.txt) using gnuplot.
  
  
• Servo-Hydraulic Fatigue Test Control Software
  
  
• FD+E Public Software proposal
  
  
• Converting torsion tests to axial
  
  
• Starting up a Fatigue Web Server