: Using singular elements (quarter-point nodes) at the crack tip to capture the high stress gradients accurately. Material Properties : Defining fracture toughness ( KICcap K sub cap I cap C end-sub
: Visualizing "Damage" or "Log of Life" to see which parts of the structure will fail first. Crack Patran Nastran
: Nastran can use the results of a static or dynamic load to predict the number of cycles ( ) until failure based on S-N or E-N curves. 3. Post-Processing and Visualization : Using singular elements (quarter-point nodes) at the