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This paper presents a technique of detecting turbine disk cracks under spin testing by analyzing the blade tip timing data. The technique is based on the principle that the crack opening displacement of a radial edge crack in rotating disks is a function of the crack length and the square of the rotational speed. The crack opening displacement is related to the inter-blade spacing which is extracted...
Prognostics and health management (PHM) is believed to become a built-in capability for the next generation military aircraft, e.g., Joint Strike Fighter (JSF). Health monitoring for gas turbine engines is certainly an essential component for such PHM systems. This paper presents a technique of detecting and diagnosing disk cracks of gas turbine engines under spin testing by analyzing the shaft displacement...
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