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Proceedings Paper

The effect of pre-stresses on guided wave propagation in plates
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Paper Abstract

Pre-stresses are frequently introduced into structures for a variety of reasons. Acoustoelastic techniques have been proposed to characterize the state of pre-stress in such structures. In plate-like structures the effect of stresses on the speed of propagation of guided waves can be exploited to characterize the state of pre-stress. In this study, the effect of pre-stresses with gradients on the propagation speed of guided waves is examined. In the context of acoustoelasticity, an isotropic plate with a pre-stress gradient behaves like a laminated anisotropic material. The acoustoelastic constants are a function of direction of wave propagation and are also dependent on the thickness coordinate. Acoustoelastic theory and laminated anisotropic plate theory are combined in this study. The inhomogeneity of constitutive behavior through the thickness of the plate is modeled suitably using a transfer matrix method. The effect of pre-stress gradient magnitudes on dispersion curves of symmetric and antisymmetric modes of guided wave propagation is demonstrated. Dispersion curves are presented for an aluminum plate as a function of magnitude and direction of applied pre-stress gradients.

Paper Details

Date Published: 19 April 2017
PDF: 8 pages
Proc. SPIE 10169, Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, and Civil Infrastructure 2017, 1016927 (19 April 2017); doi: 10.1117/12.2262556
Show Author Affiliations
Kranthi Peddeti, FLSmidth Inc. (United States)
Sridhar Santhanam, Villanova Univ. (United States)


Published in SPIE Proceedings Vol. 10169:
Nondestructive Characterization and Monitoring of Advanced Materials, Aerospace, and Civil Infrastructure 2017
H. Felix Wu; Andrew L. Gyekenyesi; Peter J. Shull; Tzu-Yang Yu, Editor(s)

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