XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX''"> Materials with Multiple Mean S-N Curves
Multiple mean stress curve analysis uses empirical data to account for mean stress effects rather than analytical methods such as Gerber and Goodman. MSC.Fatigue can calculate fatigue damage and life for materials with multiple mean stress S-Ncurves, using an ASCII materials database (nmats.mnd). Users can edit and add their own materials data by copying nmats.mnd from the installation directory to their own run directories. The following printout from the ASCII database shows the properties of two materials:
Multiple mean stress curve analysis is for S-N analysis only. Temperature corrections, certainty of survival, Optimization and Fast Analysis are not available for Multiple Mean Stress Curve S-N analysis.
Mean Stress Correction
Set the Mean Stress Correction optionmenu in the Solution Parameters to Multiple Mean Curves.
Solution Parameters
.
Material Information
The Material Information form is identical to the standard S-N analysis, except:
An ASCII materials database is used (extension .mnd) instead of the standard Materials database (.mdb).
Selecting the Materials Database Manager button brings up a text editor instead of PFMAT.
Clicking on the
Materials Databse Manager brings the file containing the
Multiple Mean Stress Curve data.
