In Situ Fastener-Integrated Crack Detection for Aircraft Fatigue Monitoring Navy SBIR FY2016.1 Sol No.: Navy SBIR FY2016.1 Topic No.: N161-009 Topic Title: In Situ Fastener-Integrated Crack Detection for Aircraft Fatigue Monitoring Proposal No.: N161-009-0458 Firm: KCF Technologies, Inc 336 South Fraser Street State College, Pennsylvania 16801 Contact: Jacob Loverich Phone: (814) 867-4097 Web Site: http://www.kcftech.com Abstract: KCF will develop a compact sensor which can detect fatigue cracks in aircraft structures around fastener through-holes without removing fasteners or significantly modifying the fastener or structure. The proposed sensor will induce a minor impact and analyze the local vibration modes and acoustic resonance of the structure to exploit changes in the free vibration of the fastener/structure combination when a fatigue crack is present. The principle of this inspection method has a long history as an NDT method, commonly referred to as a "coin tap" test, however the application of this method has remained relatively primitive and subjective. KCF will advance this tried and tested inspection method with modernized, high-sensitivity vibration and acoustic sensors coupled with a miniature piezo or solenoid impactor and our ultra-high bandwidth wireless data system. We will also investigate the feasibility of other NDT methods in novel packages by performing a survey of modern NDT modalities and assess their potential to solve the installed inspection requirements. Benefits:  Compact, fastener integrated or add on wireless fatigue crack detection system  Simple, easy to install NDT system compatible with numerous fastener types  Compatible with metallic and composite structures  No fastener or structure modifications necessary to detect fatigue cracks  Based on proven "coin tap" test, with modern sensors and analysis - no subjectivity  Wireless architecture reduces weight, cost, and time - increasing versatility  Integration with HUMS and IHSMS for periodic or continuous monitoring  Fatigue crack sensor applicable to commercial aerospace industries, large asset monitoring, and numerous industrial applications Return