Predicting the broadband response of a layered cone-cylinder-cone shell

Chronopoulos, Dimitrios; Ichchou, Mohamed; Troclet, Bernard; Bareille, Olivier

doi:10.1016/j.compstruct.2013.07.055

Cited by 27 publications

(15 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is noted that R is a direct function of k w and θ, therefore the ∂R ∂k w and ∂R ∂θ terms are straightforward [24,25,26] to compute. The global stiffness matrix K of the structural segment is formed by adding the local stiffness matrices of individual FEs as…”

Section: Calculation Of the Wave Energy Skew Anglementioning

confidence: 99%

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

Chronopoulos

2017

Ultrasonics

View full text Add to dashboard Cite

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.

show abstract

Section: Calculation Of the Wave Energy Skew Anglementioning

confidence: 99%

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

Chronopoulos

2017

Ultrasonics

View full text Add to dashboard Cite

show abstract

“…These formulations are limited to the low-frequency domain, in which the modes are well defined; in the mid-high-frequency range, classical analytical approaches do not give a good estimation of the waves dispersion characteristics, due to an high modal density. As alternatives, in a wave propagation framework, for the parameter identification other methods based on the wavenumber domain (k -space) analysis [6,7,8,9] or based on the Statistical Energy Analysis (SEA) [10,11,12] are introduced.…”

Section: Introductionmentioning

confidence: 99%

K-space analysis of complex large-scale meta-structures using the Inhomogeneous Wave Correlation method

Tufano

Errico

Robin

et al. 2020

Mechanical Systems and Signal Processing

View full text Add to dashboard Cite

An inverse wavenumber identification tool is used to characterize the vibration behavior of three structures and meta-structures with different complexity levels: a plane steel panel, a curved thick composite sandwich shell and a stiffened aluminum aircraft sidewall panel. Bare structures are first studied and then equipped with spatially distributed small-scale resonators, leading to meta-structures. For the two curved panels, tests are conducted under diffuse acoustic field and point mechanical excitations. For each studied case, the effect of the industrially-oriented small-scale resonators is highlighted using frequency and wavenumber analysis, showing general attenuation of the vibration level and even band gaps occurrence. The complex wavenumber identification allows also estimating the structural loss factor in the composite sandwich panel, while the multi-modal behavior is captured in the aluminum aircraft sidewall panel.

show abstract

“…The Wave and Finite Element (WFE) method was introduced in [7,8] in order to facilitate the post-processing of the eigenproblem solutions. The WFE has recently found applications in predicting the vibroacoustic and dynamic performance of composite panels and shells [9][10][11] , with complex periodic structures [12,13] having been investigated. The variability of vibroacoustic transmission through layered structures [14][15][16], as well as structural identification [17] have also been considered.…”

Section: Introductionmentioning

confidence: 99%

A wave and finite element methodology for structural identification in layered composite structures

2018

Self Cite

View full text Add to dashboard Cite

In this work we present for the first time an approach for identifying the geometric and material characteristics of layered composite structures through an inverse wave and finite element approach. More specifically, this Non-Destructive Evaluation (NDE) approach is able to recover the thickness, density, as well as all independent mechanical characteristics such as the tensile and shear moduli for each layer of the composite structure under investigation. This is achieved through multi-frequency single shot measurements. It is emphasized that the success of the approach is independent of the employed excitation frequency regime, meaning that both structural dynamics and ultrasound frequency spectra can be employed. It is demonstrated that more efficient convergence of the identification process is attained closer to the bending-to-shear transition range of the layered structure. Since a full FE description is employed for the periodic composite, the presented approach is able to account for structures of arbitrary complexity. The procedure is applied to a sandwich panel with composite facesheets and results are compared with two wave-based characterization techniques: the Inhomogeneous Wave Correlation method and the Transition Frequency Characterization method. Numerical simulations and experimental results are presented to verify the robustness of the proposed method.

show abstract

Predicting the broadband response of a layered cone-cylinder-cone shell

Cited by 27 publications

References 25 publications

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

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

K-space analysis of complex large-scale meta-structures using the Inhomogeneous Wave Correlation method

A wave and finite element methodology for structural identification in layered composite structures

Contact Info

Product

Resources

About