Ultrasonic Sensing and Life Prediction for the DARPA Structural Integrity Prognosis System
作者： Jennifer E. Michaels , Thomas E. Michaels , Adam C. Cobb , Gregory J. Kacprzynski
DOI: 10.1063/1.2718137
关键词:
摘要: The overall objective of the DARPA Structural Integrity Prognosis System (SIPS) program is to develop technologies advance material damage state condition assessment with limited or no dedicated maintenance action. As a part sensors thrust area, an in situ ultrasonic sensing method was developed and demonstrated detect cracks initiating from fastener holes provide estimate total crack area. Crack area estimates were combined load history data, projected future loads, life prediction models determine probability density function for time‐to‐failure. utilizes two shear wave angle beam transducers operating through transmission mode which are mounted on either side hole. transmitted travels expected cracking, presence around decreases amount acoustic energy that received. Furthermore, as open close during fatigue process, received modula...
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