In-situ Quantitative Monitoring of Fatigue Crack Using Fastest Time of Flight Diffraction (FTOFD) Method
Position and size monitoring of fatigue cracks in metal structures is of great concern to manufacturers as well as maintenance personnel for significantly improving safety and reliability of aircraft.Much progress has been made for crack position monitoring in the past few years.However,crack size monitoring is still very challenging.In this study,Fastest Time of Flight Diffraction (FTOFD)method was developed to monitor both the position and size of a crack.FTOFD method uses an integrated sensor network to activate and receive ultrasonic waves in a structure.Diffraction waves will be generated when ultrasonic waves pass a crack.These diffraction waves are then received and analyzed to get the position and size of the crack.Experiment results showed that the monitored size of the simulated crack is very close to the real size of the crack.
Structure health monitoring fatigue crack diffraction waves crack size quantification
Du Chaoliang Wang Yishou Gao Dongyue Liu Kehai Qing Xinlin
State Key Laboratory of Turbulence and Complex Systems & Department of Mechanics and Aerospace Engin Beijing Aeronautical Science and Technology Research Institute of COMAC, Beijing, 102211, PR China;S State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technolog Beijing Aeronautical Science and Technology Research Institute of COMAC, Beijing, 102211, PR China
国际会议
上海
英文
191-191
2012-10-19（万方平台首次上网日期，不代表论文的发表时间）