Geometrically Nonlinear Behavior of Sandwich Plates

Elmalich, Dvir; Rabinovitch, Oded

doi:10.2514/1.j052247

Cited by 11 publications

(17 citation statements)

References 25 publications

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“…Frostig [15] and Frostig and Thomsen [17] revealed a good agreement between the results of buckling and vibration analyses of sandwich plates, respectively, and classical and reduced order sandwich theories. Elmalich and Rabinovitch [20,21] revealed a good agreement between these classical and reduced order benchmarks and the results of the FE models that were developed based on a high-order theory. These comparisons demonstrate that in spite of the neglect of the in-plane shear stiffness and in-plane normal stiffness of the core, the high-order theories well capture the response of the sandwich plate, including the twist effect.…”

Section: Introductionmentioning

confidence: 70%

“…Yet, the validation of this model through comparison with experimental results reported in Sokolinsky et al. [22] for the natural frequencies of a soft-core sandwich beam revealed that it well captures twist governed vibration modes, see Elmalich and Rabinovitch [21].…”

Section: Introductionmentioning

confidence: 84%

“…This family of high-order sandwich plate theories totally neglects the contribution of the core to any D xy type of twist resistance mechanism. As a member of this class of models, the high-order FE formulation developed for the geometrically linear and geometrically nonlinear analyses of sandwich plates in Elmalich and Rabinovitch [20] and [21], respectively, also neglected the in-plane normal stiffness and the in-plane shear stiffness of the core materials. Yet, the validation of this model through comparison with experimental results reported in Sokolinsky et al.…”

Section: Introductionmentioning

confidence: 99%

“…These FEs aim to handle the scatter of the geometrical and elastic scales as well as the 3D localized effects, but to avoid meshing through the thickness of the core. The specially tailored FEs that are based on the geometrically linear and nonlinear CHSAPT were developed in Elmalich and Rabinovitch [20] and [21], respectively. The specially tailored FE that is based on the EXHSAPT is developed here.…”

Section: Introductionmentioning

confidence: 99%

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Twist in soft-core sandwich plates

Elmalich

Rabinovitch

2014

Jnl of Sandwich Structures & Materials

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This paper studies the twist behavior of soft-core sandwich plates. The paper adopts a comparative analytical approach, derives a geometrically nonlinear extended high-order sandwich plate theory, and compares this theory with the classical high-order one. The extended theory takes all stiffness components of the core and its Poisson effect into account and considers the direct contribution of the in-plane shear stresses in the core to the twist resistance mechanism. The classical high-order sandwich plate theory, which is presented for comparison, neglects the in-plane shear and normal stiffness of the core and attributes the twist mechanism to the composite action of the face sheets and to the ability of the core to resist out-of-plane shear and out-of-plane normal stresses. Both theories account for large displacements, moderate rotations, and small strains in the face sheets and serve as platforms for the development of specially tailored finite elements. Along with the development of the extended sandwich plate theory, the paper studies the twist behavior, compares the two theories, compares the results with experimental ones taken from the literature, and looks into the impact of the geometrical nonlinearity on the twist response.

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Section: Introductionmentioning

confidence: 70%

Section: Introductionmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Twist in soft-core sandwich plates

Elmalich

Rabinovitch

2014

Jnl of Sandwich Structures & Materials

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“…In doing so, some studies have used the assumptions on geometrical nonlinearity in the dynamics of sandwich panels, for example, [19,20], while the other ones have examined the influence of material nonlinearity. The effect of a viscoelastic core on damped forced oscillations has been considered, for example, in [21,22].…”

Section: Introductionmentioning

confidence: 99%

Linear and Nonlinear Dynamic Analyses of Sandwich Panels with Face Sheet‐to‐Core Debonding

Burlayenko

2018

Shock and Vibration

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A survey of recent developments in the dynamic analysis of sandwich panels with face sheet-to-core debonding is presented. The finite element method within the ABAQUS6 code is utilized. The emphasis is directed to the procedures used to elaborate linear and nonlinear models and to predict dynamic response of the sandwich panels. Recently developed models are presented, which can be applied for structural health monitoring algorithms of real-scale sandwich panels. First, various popular theories of intact sandwich panels are briefly mentioned and a model is proposed to effectively analyse the modal dynamics of debonded and damaged (due to impact) sandwich panels. The influences of debonding size, form, and location and number of such damage incidents on the modal characteristics of sandwich panels are shown. For nonlinear analysis, models based on implicit and explicit time integration schemes are presented and dynamic responses gained with those models are discussed. Finally, questions related to debonding progression at the face sheet-core interface when dynamic loading continues with time are briefly highlighted.

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