ESDU Fatigue - Fracture Mechanics Series
Methods and data are given for strength calculations primarily on aircraft and aerospace structures. The principles of linear elastic fracture mechanics are employed to provide data for strength analysis of cracked or flawed structures or components. The information therefore relates to damage-tolerant design.
The major body of the data consists of curves of crack propagation growth rate versus stress intensity factor range under constant amplitude fatigue loading. These data are grouped according to material, aluminium or titanium alloys or steels, and for each material the curves are grouped according to alloy type and manufacturing process. The influence of the environment is included for many materials. Where possible, mean and upper bound curves are provided.
In addition, an introduction to the principles of fracture mechanics is included with example calculations. Methods of compounding, to obtain stress intensity factors for "real life" complex geometries from simple theoretical solutions, are also treated and, for the complex case of a pin loaded lug, data for stress intensity factors are given.
A complete Section is given over to the provision of crack resistance curves for aeronautical metallic materials.
Section 1 : Organisational Documents
Section 2 : Fracture Mechanics Data - General
Introduction to the use of linear elastic fracture mechanics in estimating fatigue crack growth rates and residual strength of components.
Growth of cracks under constant amplitude fatigue loading: example calculations.
Non-destructive examination - choice of methods.
Guide to available fatigue crack propagation rate data
- ESDU CFS
Section 3 : Aluminium Alloys - Crack Propagation
Fatigue crack propagation rates and threshold stress intensity factor ranges for aluminium alloy plate, extruded bar and forgings.
Fatigue crack propagation rates and threshold stress intensity factor ranges for aluminium alloy sheet.
Effect of environment on fatigue crack propagation in aluminium alloy sheet and plate.
Fatigue crack propagation rates of experimental aluminium lithium sheet and plate alloys.
Fatigue propagation behaviour of short cracks in aluminium alloys.
- ESDU 81031
Section 4 : Steels - Crack Propagation
Section 5 : Titanium Alloys - Crack Propagation
Fatigue crack propagation rates and threshold stress intensity factor ranges for titanium alloy plate, bar and forgings.
Fatigue crack propagation rates for titanium alloy sheets.
Effect of environment on fatigue crack propagation rate in titanium alloy sheet and plate.
Fatigue propagation behaviour of short cracks in titanium alloys.
- ESDU 82015
Section 6 : Stress Intensity Factors
The compounding method of estimating stress intensity factors for cracks in complex configurations using solutions from simple configurations.
Stress intensity factors in lugs (through-thickness cracks).
Stress intensity factors for corner cracks in loaded holes in lugs and wide plates.
Rooke and Cartwright's compendium of stress intensity factors
- ESDU 78036
Section 7 : Crack Resistance Curves - Aluminium, Aluminium-Lithium and Titanium Alloys and Steels
This Series is complemented by the following software:
ESDU 20003: Crack Resistance Curves
See Data Items: 20003