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PFAT |
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PFAT |
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»Click here to display Table of Contents«
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PFAT |
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PFAT |
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PFAT – Fatigue Properties
Defines element properties for fatigue analysis.
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(2) |
(3) |
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PFAT |
ID |
Layer |
Finish |
Treatment |
Kf |
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Field |
Contents |
ID |
Each PFAT card must have a unique ID. This ID may be referenced from a FATDEF definition. No default (Integer > 0) |
Finish |
Material Surface Finish, a result of manufacturing process. See comment 3. Default = NONE (NONE, POLISH, GROUND, MACHINE, HOTROLL, FORGE 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. See comment 3. Default = NONE (NONE, NITRIDED, SHOTPEEN, COLDROLL 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. |
Layer |
Region Layer for shell elements. See comment 1. Default = 0 (0 = Worst, 1 = Top, or 2 = Bottom). |
Kf |
Fatigue strength reduction factor. See comments 2 and 3. Default = 1.0 (Real > 1.0) |
| 1. | 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). |
| 2. | Fatigue strength reduction factor takes into account the effect of notch effects, size effects, and loading type influence, |
Kf = Cnotch Csize Cloading
where, Cnotch, Csize, and Cloading are correction factors for notch effect, size effect, and loading type influence.
| 3. | Finish, Treatment and Kf are ignored in FOS analysis (TYPE=FOS on FATPARM). |
| 4. | This card is represented as a loadcollector in HyperMesh. |
See Also: