Wave steering effects in anisotropic composite structures: direct calculation of the energy skew angle through a finite element scheme

Chronopoulos, Dimitrios

Abstract

A systematic expression quantifying the wave energy skewing phenomenon as a function of the mechanical characteristics of a non-isotropic structure is derived in this study. A structure of arbitrary anisotropy, layering and geometric complexity is modelled through Finite Elements (FEs) coupled to a periodic structure wave scheme. A generic approach for efficiently computing the angular sensitivity of the wave slowness for each wave type, direction and frequency is presented. The approach does not involve any finite differentiation scheme and is therefore computationally efficient and not prone to the associated numerical errors.

Citation

Chronopoulos, D. (2017). Wave steering effects in anisotropic composite structures: direct calculation of the energy skew angle through a finite element scheme. Ultrasonics, 73, https://doi.org/10.1016/j.ultras.2016.08.020

• Journal Article Type: Article
• Acceptance Date: Aug 26, 2016
• Online Publication Date: Aug 27, 2016
• Publication Date: Jan 1, 2017
• Deposit Date: Aug 30, 2016
• Publicly Available Date: Aug 30, 2016
• Journal: Ultrasonics
• Print ISSN: 0041-624X
• Electronic ISSN: 1874-9968
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 73
• DOI: https://doi.org/10.1016/j.ultras.2016.08.020
• Keywords: Wave Steering; Composite Structures; Energy skewing; Caustics; Wave Finite Elements
• Public URL: https://nottingham-repository.worktribe.com/output/970840
• Publisher URL: http://www.sciencedirect.com/science/article/pii/S0041624X16301536?np=y
• Contract Date: Aug 30, 2016