Fatigue User’s Guide > Validation Problems > Introduction
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Introduction
This chapter includes several problems used to validate MSC.Fatigue. Although not specifically structured as tutorial example problems, the results from each can be reproduced and the files necessary to do so are included with the MSC.Fatigue installation media.
For a complete tutorial and a quick start to learning and using MSC.Fatigue, please refer to the MSC.Fatigue Quick Start Guide.
There are validation seven problems with the first being the most significant by validating the methodologies behind the three basic analysis types: S-N, -N (crack initiation), and LEFM (linear elastic fracture mechanics - crack growth) with comparisons to measured data. Comparisons to hand calculations and another fatigue code are included in subsequent problems. The later problems validate different mechanisms of solving the different analysis types such as the difference between using linear static results versus a direct transient analysis or using a frequency approach versus the time domain as is done with vibration fatigue problems.
The problems are laid out as follows:
1. Problem 1: Analysis of a Keyhole Specimen, 1179
S-N Analysis of Keyhole, 1181
Crack Initiation of Keyhole, 1191
Keyhole Results, 1207
2. Problem 2: Analysis of an Underwater Pressure Vessel, 1222
Crack Initiation of Weld, 1222
Crack Growth of Weld, 1230
3. Problem 3: Comparison to Another Code, 1237
4. Problem 4: Ten Simple Notched Geometries, 1248
5. Problem 5: Transient Results, 1259
6. Problem 6: Spot Weld Analysis, 1270
7. Problem 7: Vibration Fatigue Analysis, 1277