Experiment and FEM study of one-way mixing of elastic waves with quadratic nonlinearity. (June 2015)

• Record Type: Journal Article
• Authors: Zhao, Youxuan; Chen, Zimu; Cao, Peng; Qiu, Yanjun
• Is Part Of: NDT & E international. Volume 72(2015:Jun.)
• Page Start: 33
• Page End: 40
• Publication Date: 2015-06
• Subjects: Nonlinearity -- Wave mixing -- Experiment -- Numerical simulation; Nondestructive testing -- Periodicals; Contrôle non destructif -- Périodiques; Electronic journals; 620.1127
• DOI: 10.1016/j.ndteint.2015.02.004
• Languages: English
• ISSNs: 0963-8695

Abstract

Abstract: This paper investigates frequency deviation during imperfect resonant conditions through FEM simulations and experimental measurements using a one-way mixing technique. Waveforms of resonant waves are determined to change significantly from a diamond shape to certain toneburst trains as frequency deviation increases. The critical limit of frequency deviation for aluminum is obtained within ±7%. In the case of quasi-collinear mixing, scanning experimental results show that the received amplitude of the mixing wave increases with increasing mixing distance, and a special angle of the mixing wave in FEM simulations is found to explain this trend. Highlights: The mixing waveforms change clearly as frequency deviation increases. The critical limit of frequency deviation for aluminum is obtained within ± 7 % . Received amplitude of mixing wave increases with increasing mixing distance from experiments. A special angle of mixing wave from FEM decreases linearly with increasing mixing distance.