Introduction
Conventional crack detection relies on vibration changes at integer multiples of running speed (1X, 2X, 3X). However, hot cracks — cracks that open and close due to differential thermal expansion — can mimic unbalance, misalignment, or even disappear during cool-down tests. This leads to false diagnostics, unplanned outages, and catastrophic failures. dyrobes hot crack
In industry terms, when the thermal expansion closes the clearance to the point of contact, engineers may refer to the seal "cracking" or "opening up," or they may refer to the distinct vibration signature associated with this heat. Introduction