PFAT
Bulk Data Entry Defines element properties for fatigue analysis.
Format
(1) | (2) | (3) | (4) | (5) | (6) | (7) | (8) | (9) | (10) |
---|---|---|---|---|---|---|---|---|---|
PFAT | ID | Layer | Finish | Treatment | Kf |
Definitions
Field | Contents | SI Unit Example |
---|---|---|
ID | Each
PFAT card must have a unique
ID. This ID may be referenced from a FATDEF
definition. No default (Integer > 0) |
|
Layer | Region Layer for shell elements. 1
|
|
Finish | Material Surface Finish, a result of manufacturing process. 3
Or any float value between 0.0 and 1.0. When it is a float value, it will be used to modify the fatigue limit by multiplied with the original fatigue limit. |
|
Treatment | Material Surface Treatment for Material S-N Curve, a process used to enhance the
fatigue life. 3
Or any float value greater than 0.0. When it is a float value, it will be used to modify the fatigue limit by multiplied with the original fatigue limit. |
|
Kf | Fatigue strength reduction factor. 2
3 Default = 1.0 (Real ≥ 1.0) |
Comments
- If shell elements are used, it is necessary to specify the appropriate layer or Surface of results to use Top or Bottom. Worst is the worst result of Top and Bottom (the one with larger damage).
- Fatigue strength reduction factor takes into
account the effect of notch effects, size effects, and loading type
influence.
(1) Where, , , and are correction factors for notch effect, size effect, and loading type influence.
- Finish, Treatment and are ignored in FOS analysis (TYPE=FOS on FATPARM).
- This card is represented as a load collector in HyperMesh.