Description:

This Master Prompt connects fracture-surface observations, local deformation, material resistance, crack-driving forces and computational fracture analysis to reconstruct how a component or structure progressed from an initial discontinuity to final separation or loss of load-bearing capacity. It guides researchers in distinguishing the location where cracking began from the region that fractured last, local fracture morphology from the overall failure mechanism, and a calculated failure indicator from an independently demonstrated fracture event. The uploaded turbine-pin investigation illustrates why these distinctions matter: its interpretation combines fracture zoning, surface damage, environmental evidence and loading conditions, while explicitly noting that clear, continuous fatigue striations were not observed.