Performance of bio-inspired Kagome truss core structures under compression and shear loading

Multi-Pulse Chaotic Dynamics of Four-Dimensional Non-Autonomous Nonlinear System for a Truss Core Sandwich Plate

Volume 8: 26th Conference on Mechanical Vibration and Noise ◽

10.1115/detc2014-34133 ◽

2014 ◽

Author(s):

Wei Zhang ◽

Qi-liang Wu

Keyword(s):

Nonlinear System ◽

Chaotic Dynamics ◽

Sandwich Plate ◽

Melnikov Method ◽

Order Mode ◽

Simply Supported ◽

Truss Core ◽

Extended Melnikov Method ◽

Kagome Truss ◽

Truss Core Sandwich Plate

In this paper, an extended high-dimensional Melnikov method is used to investigate global and chaotic dynamics of a simply supported 3D-kagome truss core sandwich plate subjected to the transverse and the in-plane excitations. Based on the motion equation derived by Zhang and the method of multiple scales, the averaged equation is obtained for the case of principal parametric resonance and 1:2 sub-harmonic resonance for the first-order mode and primary resonance for the second-order mode. From the averaged equation obtained, the system is simplified to a three order standard form with a double zero and a pair of pure imaginary eigenvalues by using the theory of normal form. Then, the extended Melnikov method is utilized to investigate the Shilnikov-type multi-pulse heteroclinic bifurcations and existence of chaos. The analysis of the extended Melnikov method demonstrates that there exist the Shilnikov-type multi-pulse heteroclinic bifurcations and chaos in the four-dimensional non-autonomous nonlinear system. Finally, the results of numerical simulations also show that for the nonlinear system of simply supported 3D-kagome truss core sandwich plate with the transverse and the in-plane excitations, the Shilnikov-type multi-pulse motion of chaos can happen and further verify the result of theoretical analysis.

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Mechanical Behavior of Sandwich Panels with Quasi-Kagome Truss Core Fabricated from Expanded Metals

Transactions of the Korean Society of Mechanical Engineers A ◽

10.3795/ksme-a.2006.30.9.1078 ◽

2006 ◽

Vol 30 (9) ◽

pp. 1078-1085 ◽

Cited By ~ 3

Author(s):

Chae-Hong Lim ◽

Ji-Hyun Lim ◽

Jae-Gyu Jung ◽

Jong-Dae Lim ◽

Ki-Ju Kang

Keyword(s):

Mechanical Behavior ◽

Sandwich Panels ◽

Truss Core ◽

Kagome Truss

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Effect of imperfections on the mechanical behavior of wire-woven bulk kagome truss PCMs under shear loading

Journal of Mechanical Science and Technology ◽

10.1007/s12206-008-1202-2 ◽

2009 ◽

Vol 23 (5) ◽

pp. 1270-1277 ◽

Cited By ~ 8

Author(s):

Sangil Hyun ◽

Ji-Eun Choi ◽

Ki-Ju Kang

Keyword(s):

Mechanical Behavior ◽

Shear Loading ◽

Kagome Truss

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Conjugate forced convective heat transfer in a sandwich panel with a Kagome truss core: The effects of strut length and diameter

Applied Thermal Engineering ◽

10.1016/j.applthermaleng.2019.114794 ◽

2020 ◽

Vol 167 ◽

pp. 114794 ◽

Cited By ~ 1

Author(s):

Ubade Kemerli ◽

Kamil Kahveci

Keyword(s):

Heat Transfer ◽

Convective Heat Transfer ◽

Convective Heat ◽

Sandwich Panel ◽

Forced Convective Heat Transfer ◽

Truss Core ◽

Kagome Truss

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Sandwich Plates Actuated by a Kagome Planar Truss

Journal of Applied Mechanics ◽

10.1115/1.1778720 ◽

2004 ◽

Vol 71 (5) ◽

pp. 652-662 ◽

Cited By ~ 22

Author(s):

N. Wicks ◽

J. W. Hutchinson

Keyword(s):

Internal Resistance ◽

Face Sheet ◽

Sandwich Plates ◽

Long Wavelength ◽

Double Curvature ◽

Truss Core ◽

Pyramidal Truss ◽

Kagome Truss ◽

Optimal Stiffness

Kagome truss plates have properties that suggest they should be uniquely effective as an actuation plane for sandwich plates: a Kagome truss plate has in-plane isotropy, optimal stiffness and strength, and its truss members can be actuated with minimal internal resistance. In this paper, sandwich plates are studied that are comprised of one solid face sheet and one actuated Kagome face sheet joined by a pyramidal truss core. Various aspects of the actuation behavior of these plates are investigated, including internal resistance and strains resulting from actuation and efficiency of actuation. Single and double curvature actuation modes are investigated. Contact is made with analytic results for actuation modes with long wavelength.

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Kagome-Based High Authority Shape Morphing Structure

Aerospace ◽

10.1115/imece2004-60768 ◽

2004 ◽

Author(s):

S. L. dos Santos e Lucato ◽

R. M. McMeeking ◽

A. G. Evans

Keyword(s):

Numerical Simulation ◽

Genetic Algorithm ◽

Shape Morphing ◽

Truss Core ◽

Low Weight ◽

Morphing Structure ◽

Kagome Truss ◽

Analytic Estimation ◽

Shape Deformations

A concept for a high authority shape morphing plate is described and demonstrated. The design incorporates an active back-plane comprising a Kagome truss, capable of changing the shape of a solid face, connected to the back-plane by means of a tetrahedral truss core. The two shape deformations to be demonstrated consist of hinging and twisting. The design is performed by a combination of analytic estimation and numerical simulation, guided by previous assessments of the Kagome configuration. It is shown that, while the structure is capable of sustaining large passive loads at low weight, the demonstrable authority is actuator-limited. An optimization based on a genetic algorithm has been used to determine the best placement of a limited number of actuators in the structure for a given set of target shapes. The force capability of the actuators and failure threshold loads of the structure were ascertained in the optimization. Possible applications of such multi-shape morphing structures include ailerons and mirrors.

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