Perform uniaxial fatigue analysis using S-N (stress-life) and E-N (strain-life) approaches for predicting the life
(number of loading cycles) of a structure under cyclical loading.
Perform multiaxial fatigue analysis using S-N (stress-life), E-N (strain-life), and Dang Van Criterion (Factor of
Safety) approaches for predicting the life (number of loading cycles) of a structure under cyclical loading.
Perform uniaxial fatigue analysis using S-N (stress-life) and E-N (strain-life) approaches for predicting the life
(number of loading cycles) of a structure under cyclical loading.
From the Home tools, Files tool group, click the Open Model tool.
From the Load model and result dialog, browse and select
HL-1000\Shaft.h3d for the model
file.
The Load Result field is
automatically populated. For this tutorial, the same file is used for both
the model and the result.
Click Apply.
Tip: Quickly import the model by dragging and
dropping the .h3d file from
a windows browser into the HyperLifemodeling window.
Define the Fatigue Module
Click the SN tool.
The SN tool should be the default fatigue module selected.
If it is not, click the arrow next to the fatigue module icon to display a
list of available options.
The SN dialog opens.
Define the SN configuration parameters.
Select Uni Axial as the method.
Select MPa for the FE model units.
Select Signed von for the stress
combination.
Enter a value of 0.5 for the certainty of
survival.
Select GOODMAN for the mean stress
connection.
Select Worst for the layer selection.
Select Time Series for the type of
loading.
Exit the dialog.
Assign Materials
Click the Material tool.
The Assign Material dialog opens.
Activate the checkbox next to the part solid.
If Steel 1045, Annealed, BHN=225 (932) is not the default material assigned to
the part:
Click the Material DB tab.
Right-click on Steel 1045, Annealed, BHN=225
(932) and select Add to Assign Material
List.
Return to the Assign Material Data tab and
select Steel 1045, Annealed, BHN=225 (932) from
the Material drop-down menu.
The Material list is populated with the materials selected from
Material Database and My Material.
Optional: Click to
review the SN plot.
Accept all other default parameters.
Note: The FL (Fatigue Limit) and SE (Standard Error) values are from the SN
curve selected for the part. The SE value can be edited from both the Assign
Material Data tab and the My Material tab. The FL value can be reviewed and
edited from the My Material tab. Parameters updated in the My Material tab
will be saved to a user-defined excel spreadsheet.
Exit the dialog.
Assign Load Histories
Click the Load Map tool.
The Load Map dialog opens.
From the Channel Type drop-down menu at the top of the dialog, select
Time Data.
Click in the Choose File
field and browse for load1.csv.