WHITE PAPER COSMOSWorks COSMOS ® CONTENTS Introduction 1 What is Fatigue? 1 Determining the fatigue strength of materials 2 Methods for calculating fatigue life 4 Fatigue life calculation for designers using SN method 5 Conclusion 6 Appendix A – Crack Growth 7 Appendix B – Rainflow Counting 8 Design to Prevent Fatigue SolidWorks Corporation