Structural-acoustic aspects in the modeling of sandwich structures and computation of equivalent elasticity parameters

Ryan L. Harne; Clement Blanc; Marcel C. Remillieux; Ricardo A. Burdisso

doi:10.1016/j.tws.2012.03.012

Structural-acoustic aspects in the modeling of sandwich structures and computation of equivalent elasticity parameters

Ryan L. Harne
, Clement Blanc
, Marcel C. Remillieux
, Ricardo A. Burdisso

Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

Small-deflection theory is used along with FE models to compute the equivalent elasticity parameters of sandwich structures. Eigenfrequency and eigenmode analyses, comparing the equivalent 2-D continua with full 3-D models, are utilized to determine how continuous connections and in-vacuo assumptions are influenced as real-world discontinuities and gas- or foam-filled cavities are included. It is found that discrete connections between structural elements reduce stiffnesses and eigenfrequencies of the net structure substantially. The presence of gas or foam in the core cavities is observed to increase the overall damping of the dynamic panel response while also amplifying certain panel resonances.

Original language	English (US)
Pages (from-to)	1-8
Number of pages	8
Journal	Thin-Walled Structures
Volume	56
DOIs	https://doi.org/10.1016/j.tws.2012.03.012
State	Published - Jul 2012

All Science Journal Classification (ASJC) codes

Civil and Structural Engineering
Building and Construction
Mechanical Engineering

Access to Document

10.1016/j.tws.2012.03.012

Cite this

@article{1f88fc6581944cbeb554f209cc17111a,

title = "Structural-acoustic aspects in the modeling of sandwich structures and computation of equivalent elasticity parameters",

abstract = "Small-deflection theory is used along with FE models to compute the equivalent elasticity parameters of sandwich structures. Eigenfrequency and eigenmode analyses, comparing the equivalent 2-D continua with full 3-D models, are utilized to determine how continuous connections and in-vacuo assumptions are influenced as real-world discontinuities and gas- or foam-filled cavities are included. It is found that discrete connections between structural elements reduce stiffnesses and eigenfrequencies of the net structure substantially. The presence of gas or foam in the core cavities is observed to increase the overall damping of the dynamic panel response while also amplifying certain panel resonances.",

author = "Harne, \{Ryan L.\} and Clement Blanc and Remillieux, \{Marcel C.\} and Burdisso, \{Ricardo A.\}",

note = "Funding Information: This work was funded by the NASA Langley Research Center under Grant number NNL10AA05C, technical monitor Mr. Jacob Klos. This support is greatly appreciated. The authors wish to thank Dr. Patrice Cartraud (Ecole Centrale de Nantes, France) and Dr. Sylvie Pommier (Ecole Normale Sup{\'e}rieure de Cachan, France) for their valuable comments on the work presented.",

year = "2012",

month = jul,

doi = "10.1016/j.tws.2012.03.012",

language = "English (US)",

volume = "56",

pages = "1--8",

journal = "Thin-Walled Structures",

issn = "0263-8231",

publisher = "Elsevier Ltd",

}

TY - JOUR

T1 - Structural-acoustic aspects in the modeling of sandwich structures and computation of equivalent elasticity parameters

AU - Harne, Ryan L.

AU - Blanc, Clement

AU - Remillieux, Marcel C.

AU - Burdisso, Ricardo A.

N1 - Funding Information: This work was funded by the NASA Langley Research Center under Grant number NNL10AA05C, technical monitor Mr. Jacob Klos. This support is greatly appreciated. The authors wish to thank Dr. Patrice Cartraud (Ecole Centrale de Nantes, France) and Dr. Sylvie Pommier (Ecole Normale Supérieure de Cachan, France) for their valuable comments on the work presented.

PY - 2012/7

Y1 - 2012/7

N2 - Small-deflection theory is used along with FE models to compute the equivalent elasticity parameters of sandwich structures. Eigenfrequency and eigenmode analyses, comparing the equivalent 2-D continua with full 3-D models, are utilized to determine how continuous connections and in-vacuo assumptions are influenced as real-world discontinuities and gas- or foam-filled cavities are included. It is found that discrete connections between structural elements reduce stiffnesses and eigenfrequencies of the net structure substantially. The presence of gas or foam in the core cavities is observed to increase the overall damping of the dynamic panel response while also amplifying certain panel resonances.

AB - Small-deflection theory is used along with FE models to compute the equivalent elasticity parameters of sandwich structures. Eigenfrequency and eigenmode analyses, comparing the equivalent 2-D continua with full 3-D models, are utilized to determine how continuous connections and in-vacuo assumptions are influenced as real-world discontinuities and gas- or foam-filled cavities are included. It is found that discrete connections between structural elements reduce stiffnesses and eigenfrequencies of the net structure substantially. The presence of gas or foam in the core cavities is observed to increase the overall damping of the dynamic panel response while also amplifying certain panel resonances.

UR - https://www.scopus.com/pages/publications/84860384341

UR - https://www.scopus.com/pages/publications/84860384341#tab=citedBy

U2 - 10.1016/j.tws.2012.03.012

DO - 10.1016/j.tws.2012.03.012

M3 - Article

AN - SCOPUS:84860384341

SN - 0263-8231

VL - 56

SP - 1

EP - 8

JO - Thin-Walled Structures

JF - Thin-Walled Structures

ER -

Structural-acoustic aspects in the modeling of sandwich structures and computation of equivalent elasticity parameters

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this