Material Databases

The Fatigue Wizard ships with material databases in ASCII format stored at the location selected upon installation. The parent material libraries have the extension of .mat, and the weld material libraries have the extension of .wld.

You can edit these files with a simple text editor to add new materials, and so on. You can also create new files and copy existing files that display in the Fatigue Wizard.

The Fatigue Wizard does not read the first line of the file, which contains a description of the comma delimited data items to follow. They are, respectively;

Symbol	Description	Data type
Name or Title 1	Name, description, or first title of the materia	Text	Both
Title 2	Reference, class, or second title of the material	Text	Both
E	Modulus of Elasticity	Numeric	Both
Poisson	Poisson's ratio	Numeric	Both
UTS	Ultimate Tensile Strength	Numeric	Both
Yield	Yield Stress	Numeric	Both
SF	Fatigue strength coefficient	Numeric	Strain
B	Fatigue strength exponent	Numeric	Strain
C	Fatigue ductility exponent	Numeric	Strain
Ef	Fatigue ductility coefficient	Numeric	Strain
n	Cyclic hardening exponent	Numeric	Strain
K	Cyclic hardening coefficient	Numeric	Strain
Endurance	Endurance limit	Numeric	Stress
Cycles	Cycles at Endurance limit	Numeric	Stress

Important notes

• All data values MUST be entered in units of Force = N, Distance = mm (I.E stress in N/mm2.)
• Enter data in all fields.
• Failure to enter the correct data type (text or number) results in an error when you run the Fatigue Wizard.
• Save the material library in the "Addins\Fatigue Wizard" folder where the Autodesk Simulation software is installed.

The weld database follows the same format as in the previous section, with the following exceptions;

• The descriptor SAE denotes the standard used (BS7608, and so on).
• The descriptor BS970 denotes the weld class (F, F2, and so on).

You can use only the stress-based method with welds. Enter the strain data into the database, but you can enter 'dummy' values.