Pei Ning, Bond Leonard J
Department of Aerospace Engineering and Center for Nondestructive Evaluation, Iowa State University, Ames, Iowa 50011, USA
J Acoust Soc Am. 2017 Oct;142(4):EL327. doi: 10.1121/1.5004388.
High order Lamb waves are investigated for the effects of stress on both symmetrical and anti-symmetrical modes in an aluminum plate for wave propagation and load parallel. Data are compared with those for the case of load and measurement axis perpendicular. It is the S mode which exhibits significantly higher sensitivity to stress than other Lamb modes. For aluminum the use of the S mode for stress measurement is found to be about six times more sensitive, than bulk waves, for the load-measurement axes parallel case and this compares with about ten times for the case of load-measurement axes perpendicular.
