Ultrasonic Monitoring of Fastener Holes Using Load Modulated Energy Algorithms for Early Detection of Fatigue Cracks
作者： Adam C Cobb , Jennifer E Michaels , Thomas E Michaels , Bao Mi
DOI: 10.1063/1.2184721
关键词: Engineering 、 Structural engineering 、 Work (thermodynamics) 、 Waveform 、 Ultrasonic sensor 、 Fastener 、 Energy (signal processing) 、 Algorithm 、 Beam (structure) 、 Structural health monitoring 、 Transducer
摘要: Ultrasonic techniques have the potential to provide early detection of fatigue induced cracks originating from fastener holes with long term goal structural health monitoring. This paper considers energy‐based algorithms for analyzing ultrasonic waveforms obtained using fixed angle beam transducers in a through‐transmission configuration. The were located on either side hole sound oriented along loading direction, and as function applied load. Previous work has shown that ratio received energy at under tensile sample no load is robust method determining presence cracks. reason effectiveness this metric reduction crack opening accentuated by For monitoring applications, earliest possible cracking desired, total does not utilize...
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