Defining an SN Curve In the Fatigue_study tree, right-click the Parts folder and select Apply Fatigue Data to All Bodies . On the Fatigue SN Curves tab in the Source box: Select Derive from material Elastic Modulus. Select Based on ASME Austentic Steel curves. The curve graph appears in the Preview box and its data pairs appear in the table under the Table data box. Click Apply and Close. Parent topicFatigue Analysis of a Landing Gear Previous topic Defining Variable-Amplitude Loading Event Next topic Running the Fatigue Analysis and Viewing Results