A novel viscoelastic damping treatment for honeycomb sandwich structures

Aumjaud, Pierre; Smith, Christopher W.; Evans, K.

doi:10.1016/j.compstruct.2014.09.005

Cited by 39 publications

(23 citation statements)

References 22 publications

(49 reference statements)

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“…The method of constrained layer damping (CLD) was introduced by Kerwin 12 and it has been the most used technique in vibration suppression 13 . Many optimization techniques such as Genetic Algorithm 14 , Moving Asymptotes method 15 , Topology Optimization method 16 , modal strain energy method 17 and recently Double Shear Lap-Joint-configuration 13,18 were successfully adopted to optimize the location and dimensions of CLD, in order to maximize the structural damping while minimizing additional mass.…”

Section: Introductionmentioning

confidence: 99%

“…Many optimization techniques such as Genetic Algorithm 14 , Moving Asymptotes method 15 , Topology Optimization method 16 , modal strain energy method 17 and recently Double Shear Lap-Joint-configuration 13,18 were successfully adopted to optimize the location and dimensions of CLD, in order to maximize the structural damping while minimizing additional mass. However, the introducing of the damping layer can reduce the stiffness of the sandwich structures 11 .…”

Section: Introductionmentioning

confidence: 99%

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Vibration and damping characteristics of 3D printed Kagome lattice with viscoelastic material filling

Wang

Shang

et al. 2018

Sci Rep

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Constrained layer dampers (CLD) are in widespread use for passive vibration damping, in applications including aerospace structures. However, the introducing of the damping layer can reduce the stiffness of the sandwich structures. A viscoelastic material filling (VMF) is chosen to balance structural and vibrational performance of lattice truss in this work. The recently brought forward 3D Kagome truss with face sheet was manufactured by selective laser sintering technology and the thermosetting polyurethane was chosen as the viscoelastic filling material. A novel complex modal analysis finite element method for Hybrid composite lattice truss sandwich is introduced in this paper. Dynamic analysis experiment results show that the VMF method is found to be effective in reducing the vibration amplitude and it has the potential for band-gap design. The VMF method can provide high stiffness at low mass and considerable vibrational performance at low cost and it can be considered as a general vibration design method in lattice truss manufacture.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Vibration and damping characteristics of 3D printed Kagome lattice with viscoelastic material filling

Wang

Shang

et al. 2018

Sci Rep

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“…On the other hand, passive damping treatments lead to reliable, low cost and robust vibration control [19,20]. A lot of research has so focused on composite structures embedding viscoelastic materials to damp vibrations [21][22][23]. In particular, many people have studied the design optimization of multilayers structures [24][25][26] by varying the thickness of the viscoelastic layer, the fiber orientation or the aspect ratio of the structure.…”

Section: Introductionmentioning

confidence: 99%

Sandwich structures with tunable damping properties: On the use of Shape Memory Polymer as viscoelastic core

Butaud

Foltête

Ouisse

2016

Composite Structures

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a b s t r a c tA Shape Memory Polymer (SMP), the tBA/PEGDMA, is used as viscoelastic core in sandwich structures. The dynamic mechanical characterization of this SMP highlights promising damping properties. The composite sandwich is developed by coupling the SMP with aluminum skins. The SMP core temperature is tuned from the Time-Temperature Superposition Principle through a rainbow calibration curve in order to correspond to optimal values of damping ratio in the frequency range of interest. The damping performances predicted by a Finite Element model are validated experimentally using modal analysis. The experimental results are found to be in good agreement with the predictions of the Finite Element model. Furthermore, it is found that the controlled heating of the SMP core allows damping the structure over a wide frequency range. The methodology which is proposed in this paper is applicable to any viscoelastic material exhibiting frequency -and temperature -dependent high damping properties.

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“…Recently, the authors developed a new conceptthe Double Shear Lap Joint (DSLJ) damper -a high weight-efficiency passive damper which can be located internally within structures, e.g. a honeycomb core [10]. It consists of a double shear lapjoint arrangement which can be inserted along three different orientations into the hexagonal cell of a honeycomb lattice and filled with viscoelastic damping polymer [11].…”

Section: Introductionmentioning

confidence: 99%

“…Some of these optimised configurations for constrained layer dampers were investigated for honeycomb cored sandwich panels, and compared with solutions using DSLJ dampers. The DSLJ dampers were placed at locations with the highest strain energy in the first vibration mode [10]. The DSLJ damper was notable because it exhibited a better weight-efficient damping performance than the constrained layer dampers, i.e.…”

Section: Introductionmentioning

confidence: 99%

Multi-objective optimisation of viscoelastic damping inserts in honeycomb sandwich structures

Aumjaud

Fieldsend

Boucher

et al. 2015

Composite Structures

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This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain.Multi-objective optimisation of viscoelastic damping inserts in honeycomb sandwich structures AbstractThe Double-Shear Lap Joint (DSLJ) is a novel damping insert sited internally within a structure which is particularly well suited for lightweight sandwich structures with internal voids, such as honeycomb core sandwich panels. In high performance lightweight structures, the insertion of relatively more dense dampers of any type may increase the total mass substantially and alter the mass distribution significantly. The objective herein was to determine the optimum location, number and orientation of DSLJ inserts within a typical sandwich panel, and thereby to assess the efficacy of two different optimisation approaches to this problem; a parametric optimisation and the Adaptive Indicator-Based Evolutionary Algorithm (IBEA). Both approaches were used to maximise the damping while minimising the additional mass of the damping inserts applied to the structure. Although the parametric approach was faster and easier to implement, the Adaptive IBEA identified significantly better configurations in many cases, especially where veering occurred, in one case improving modal loss factors more than fourfold vs the parametric method. Solutions were identified with large increases in modal loss factors but only small increases in mass vs the empty structure.

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A novel viscoelastic damping treatment for honeycomb sandwich structures

Cited by 39 publications

References 22 publications

Vibration and damping characteristics of 3D printed Kagome lattice with viscoelastic material filling

Vibration and damping characteristics of 3D printed Kagome lattice with viscoelastic material filling

Sandwich structures with tunable damping properties: On the use of Shape Memory Polymer as viscoelastic core

Multi-objective optimisation of viscoelastic damping inserts in honeycomb sandwich structures

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