Bending and free vibration analysis of foam-filled truss core sandwich panel:
01 Jun 2018-Journal of Sandwich Structures and Materials (SAGE PublicationsSage UK: London, England)-Vol. 20, Iss: 5, pp 617-638
TL;DR: In this paper, the studies carried out on bending and free vibration behavior of truss core sandwich panel filled with foam typically used in aerospace applications were carried out, and the results of the studies were presented.
Abstract: This paper presents the studies carried out on bending and free vibration behavior of truss core sandwich panel filled with foam typically used in aerospace applications. Equivalent stiffness prope...
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TL;DR: In this paper, a truss core sandwich panel is filled with polyurethane foam (PUF) to achieve better vibro-acoustic and sound transmission loss characteristics.
45 citations
TL;DR: In this article, a micropolar Timoshenko beam formulation is developed and used to model web-core sandwich beams, where the split of the shear forces into symmetric and antisymmetric parts plays a pivotal role.
36 citations
01 Dec 2019
TL;DR: In this article, the employability of different natural fibers in forming composites with different matrix materials and the impact of fiber length, chemical treatment, and compositions on the dynamic mechanical characteristics were discussed in detail.
Abstract: Natural fiber composites have become a new tradition as an alternative to conventional materials. To meet this new tradition material testing, newer techniques have been set up that are termed as dynamic mechanical analysis (DMA), which is an adaptable methodology that accompanies the more traditional techniques. Through these techniques, it is summarized that interconnected bonds between reinforced natural fibers within different matrix materials will affect the dynamic variables like storage modulus (E′), loss modulus (E″), and damping factor (tan δ), and also, it was stated that these are temperature dependent. The dynamic variables were unfavorably affected by the improvement in the length of fibers and fiber loading, but geometric changes (developments) were not considered. Frequent uncertainties in the dynamic loading in any structure are because of noises, shocks, winds, tides in the ocean and some of the live and imbalanced loads, etc. Much importance was given to vibration damping parameters for structural applications in order to have an improvement in the effectiveness, performance, and freeness in some of the building constraints. In this review, the employability of different natural fibers in forming composites with different matrix materials and the impact of fiber length, chemical treatment, and compositions on the dynamic mechanical characteristics were discussed in detail.
33 citations
TL;DR: In this article, a closed-cell aluminum foam was filled into the interspaces of a sandwich panel with corrugated cores to form a composite structure, which was expected to have enhanced performance.
Abstract: In this study, a closed-cell aluminum foam was filled into the interspaces of a sandwich panel with corrugated cores to form a composite structure. The novel structure is expected to have enhanced ...
32 citations
Cites background from "Bending and free vibration analysis..."
...Experimental, theoretical, and numerical studies were focused on the polyurethane foam-filled hexagonal [26–28] and square [29] honeycombs as well as corrugated [29,30] and truss [31] cores subjected to the quasi-static and dynamic loading....
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TL;DR: In this paper, the deformation relations of multilayer lattice sandwich beams are theoretically developed, and consequently the constitutive relations of the truss core layers are derived by using such a deformation energy based method.
24 citations
References
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TL;DR: In this paper, an analytical formulation and solutions to the natural frequency analysis of simply supported composite and sandwich plates based on a higher-order refined theory developed by the first author and already reported in the literature are presented.
352 citations
TL;DR: In this article, a numerical approach to evaluate the stiffness parameters for corrugated board is presented, which is based on a detailed micromechanical representation of a region of Corrugated Board modelled by means of finite elements.
138 citations
TL;DR: In this article, the authors presented numerical studies on the vibration and acoustic response characteristics of a fiber-reinforced composite plate in a thermal environment by considering the inherent material damping property of the composite material.
129 citations
TL;DR: In this paper, a truss-core sandwich panel is introduced and its elastic properties are presented, where two thin flat sheets, separated by two inclined plates acting as the core and rigidly jointed at their ends, characterize the sandwich section.
Abstract: In this paper, a truss-core sandwich panel is introduced and its elastic properties are presented. Two thin flat sheets, separated by two inclined plates acting as the core and rigidly jointed at their ends, characterize the sandwich section. This construction form eliminates most of the attendant problems of conventional spot-welded or rivet-fastened sandwich panel construction. Advantages of the truss-core panel are discussed. The 3D sandwich panel is idealized as an equivalent 2D orthotropic thick plate continuum. Equivalent bending, twisting, and transverse shear stiffness are derived, and the influence of the relatively weak shear stiffness on the behavior is discussed. By integrating these elastic stiffness constants into closed-form solution, panel response is calculated. The calculated results, which requires significantly less computational effort, agree well with 3D finite-element analysis. Comparisons of stiffnesses and deflections with the corresponding responses of conventional sandwich construction are provided. This study indicates that the truss-core sandwich panel performs better due to its inherently higher flexural resistance per unit weight.
114 citations
TL;DR: The authors reviewed the most significant works in literature about the acoustic behaviour of sandwich panels, starting from the first examples of multi-layered structures, comprising a series of different dif...
Abstract: This paper reviews the most significant works in literature about the acoustic behaviour of sandwich panels, starting from the first examples of multi-layered structures, comprising a series of dif...
101 citations