Detection of Thermal Fatigue in Composite Laminates Using Nonlinear Ultrasonic Guided Wave
This study develops a new approach to evaluate material degradation of composite laminates by using nonlinear Lamb wave, the correlation between normalized nonlinear parameters and degradation states was studied. Depended on dispersive curve, a specific lamb mode SI which is phase and group matching was chosen for the practical generation of nonlinear lamb wave. Group delay method was used to separate multi-modes of wave-packet. The results show that it is possible to measure the nonlinearity of composite laminate by using Lamb wave, the measured acoustics normalized nonlinearity using Lamb wave are directly related to material degradation, from these results, it could be concluded that it is possible to use nonlinear Lamb wave to evaluate composite laminates degradation.
composite laminates material degradation nonlinear lamb wave
Weibin LI Younho CHO Taeho JU Jan D.ACHENBACH Heung Soap CHOI
School of Mechanical Engineering, Pusan National university, Busan.609-735, South Korea Center for Quality Engineering & Failure Prevention, Northwestern University, Evanston, IL 60208-302 Composite R&D, Project Planning, Korean Air R&D Center, Aerospace Division, Korean Air, South Korea
国际会议
The 2010 International Symposium on Safety Science and Technology(2010 安全科学与技术国际会议)
杭州
英文
1806-1812
2010-10-26（万方平台首次上网日期，不代表论文的发表时间）