Transverse Shear Stiffness of Composite Honeycomb Core with General Configuration

Xu, X. Frank; Qiao, Pizhong; Davalos, Julio F.

doi:10.1061/(asce)0733-9399(2001)127:11(1144)

Cited by 55 publications

(36 citation statements)

References 8 publications

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“…The exact solutions for torsional rigidity of sandwich structures, including those made of orthotropic plates are available [15][16][17][18][19][20]. In the following section the optimum design method of a minimum weight sandwich structure is discussed for a given torsional stiffness.…”

Section: Theory Analysis Of Minimum-weight Sandwich Structure Optimummentioning

confidence: 99%

Minimum-Weight Sandwich Structure Optimum Design Subjected to Torsional Loading

Wang

et al. 2011

Appl Compos Mater

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As one of the most valued structural engineering innovations developed by the composites industry, sandwich structures are now used extensively in automotive, aerospace and civil infrastructure due to the main advantage of lightweight. This paper develops a minimum weight optimization method for sandwich structure subjected to torsion load. The design process are identified for a sandwich structure required to meet the design constraint of torsion stiffness. The optimum solutions show that at optimum design the core weight accounts for 66.7% of the whole sandwich structure. To illustrate the newly developed optimum design solutions, numerical examples are presented for sandwich structures made of either isotropic face skins or orthotropic composite face skins. Agreement between the theoretical analysis and the examples results is good.Keywords Sandwich structure . Lightweight . Torsion stiffness . Optimum design Nomenclature t f thickness of facing skins (assuming that both facing skins are same) E f elastic (Young's) modulus of facing material(assuming that both facing skins are same) l length of the sandwich plate

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Section: Theory Analysis Of Minimum-weight Sandwich Structure Optimummentioning

confidence: 99%

Minimum-Weight Sandwich Structure Optimum Design Subjected to Torsional Loading

Wang

et al. 2011

Appl Compos Mater

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“…For the transverse shear moduli, the formulas for general core configuration obtained from homogenization theory [Xu et al 2001] are applied for the case of sinusoidal core.…”

Section: Effective Flexural and Shear Stiffness Of Sandwich Decksmentioning

confidence: 99%

A coupled honeycomb composite sandwich bridge-vehicle interaction model

Yang

Papagiannakis

2010

J. Mech. Mater. Struct.

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This paper presents a coupled, dynamic vehicle and honeycomb composite sandwich bridge deck interaction model. The composite sandwich deck consists of E-glass fibers and polyester resin. Its core consists of corrugated cells in a sinusoidal configuration along the travel direction. First, analytical predictions of the effective flexural and transverse shear stiffness properties of the sandwich deck were obtained in the longitudinal and transverse directions. These were based on the modeling of equivalent properties for the face laminates and core elements. Using the first order shear sandwich theory, the dynamic response of the sandwich deck was analyzed under moving dynamic loads. A dynamic vehicle simulation model was used for the latter, assuming that the deck response is the only source of excitation (i.e., its roughness was assumed to be negligible). Subsequently, the dynamic load factors of the sandwich bridge deck were calculated for different traveling velocities. The results suggest that the dynamic load factors vary with the traveling speed and increase significantly with decreasing deck stiffness. Considering multiple degrees of freedom for the vehicle further amplifies the dynamic loading factor and increases the vibration generated by vehicles.

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“…The solutions for the core effective transverse shear moduli (G e yz and G e x z ) are obtained based on a homogenization method [Xu et al 2001] and are given as …”

Section: 2mentioning

confidence: 99%

Untitled

2010

J. Mech. Mater. Struct.

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This study presents the development of a constitutive model for in-plane mechanical behavior of five styles of plain woven Kevlar fabrics impregnated with silica nanoparticles. The neat fabrics differed in fiber type, yarn count, denier, weave tightness and strength, and varying proportions (4, 8, 16 and 24% by weight) of nanoparticles were added to enhance the mechanical properties of the fabric. It was found that fabrics impregnated with nanoparticles exhibit significant improvement in shear stiffness and a slight increase in tensile stiffness along the yarn directions over their neat counterparts. A constitutive model was developed to characterize the nonlinear anisotropic properties of nanoparticle-impregnated fabrics undergoing large shear deformation. The parameters for the model were determined based on uniaxial (along yarn directions) and 45• off-axis tension tests. This model was incorporated in the commercial FEA software ABAQUS through a user-defined material subroutine to simulate various load cases.

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Transverse Shear Stiffness of Composite Honeycomb Core with General Configuration

Cited by 55 publications

References 8 publications

Minimum-Weight Sandwich Structure Optimum Design Subjected to Torsional Loading

Minimum-Weight Sandwich Structure Optimum Design Subjected to Torsional Loading

A coupled honeycomb composite sandwich bridge-vehicle interaction model

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