Free vibration analysis of integrated and non-integrated corrugated core sandwich panels reinforced with weft-knitted fabrics

Atar, Hamid Abedzade; Zarrebini, Mohammad; Hasani, Hossein; Rezaeepazhand, Jalil

doi:10.1177/1099636219900343

Cited by 7 publications

(5 citation statements)

References 27 publications

(42 reference statements)

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“…Assessment of the total reaction forces predicted using the two finite element models is based on evaluating the efficient elastic constant of honeycomb cores. Abedzade Atar et al [ 15 ] Studied free vibration analysis of corrugated core rectangular core sandwich panels.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study of transverse shear modulus for bioinspired glass fiber‐reinforced polymer sandwich core

Gunasegeran

Sudhagar

2022

Polymer Composites

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Sandwich panels with cellular material cores are widely used in the aerospace, automotive, and marine industries. Although honeycombs with hexagonal cells are the most frequent shapes for cores, new possibilities in lightweight structures have lately emerged. The present work evaluates the transverse shear modulus of the glass‐reinforced polymer honeycomb core (GFRP ‐ HC) and glass‐reinforced polymer corrugated bioinspired model (GFRP ‐ CBIM) core. The experimental results from the alternative dynamic technique agreed well with the numerical simulation. In the GFRP sandwich beam with corrugated HC and CBIM's core, numerical free vibration analysis was performed. The CBIM core has a higher natural frequency than the HC core, according to the numerical data. Further, numerical analysis has been performed on the bioinspired cores by varying the side length and edge radius. Modified bioinspired model ‐ 03 core design (MBIM03) appears to be a good option for regular honeycombs used in sandwich composite panels for industrial applications that demand low weight, high rigidity, and a large amount of energy‐absorbing capacity.

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Section: Introductionmentioning

confidence: 99%

Experimental and numerical study of transverse shear modulus for bioinspired glass fiber‐reinforced polymer sandwich core

Gunasegeran

Sudhagar

2022

Polymer Composites

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“…The alternate sequence of 2-ply laminate provides bending resistance in the direction of corrugation. The authors of this paper in their previous article have shown that in the transverse direction of corrugation integrated structure exhibits both higher natural frequency and higher flexural stiffness compared to the non-integrated structure [20]. Additionally, the thickness of the non-integrated samples is more than that of the integrated samples.…”

Section: Comparison Of the Three Methods Of Elastic Constant Determinmentioning

confidence: 78%

“…Stoll CMS-400 (E5) flat weft knitting machine was used to knit the 3-D reinforcement fabric with rectangular cross section for use in integrated sandwich panel. The same machine was also used to knit the conventional 2-D fabrics as the reinforcement of the non-integrated sandwich panel according to Abedzade et al [20]. Figure 1 illustrates the schematic and the actual 3-D knitted fabric.…”

Section: Methodsmentioning

confidence: 99%

Determination of corrugated core sandwich panels elastic constant based on three different experimental methods and effect of structural integrity on flexural properties

et al. 2021

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This study deals with the investigation of flexural stiffness and transverse shear rigidity in the direction of corrugation of the integrated and non-integrated corrugated core sandwich panels with the rectangular core. The non-integrated sandwich panels were reinforced with conventional 2-D fabrics in which resin provides the bond between core and skins. The integrated sandwich panels were reinforced with 3-D weft knitted fabrics in which bonding of the core wall to skins was carried out by combined efforts of knitted loop and resin. Using weft knitting technical capabilities, samples of the integrated and non-integrated structures were manufactured with the uppermost degree of resemblance in terms of geometry and mass. Flexural stiffness and transverse shear rigidity of the structures based on the known and unknown facing modulus of ASTM D7250 standard and Nordstrand–Carlsson methods were calculated. The estimated elastic constants based on unknown facing modulus and the Nordstrand–Carlsson methods were found to be highly compatible. However, the unknown facing modulus method is prone to disclose the statistical significant differences between the elastic constants of the structures with fewer tests. Regarding the unknown facing modulus method, it was found that the flexural stiffness and transverse shear rigidity of the non-integrated structure in the direction of corrugation were higher than those of the integrated structure. Results also indicated that the load-carrying capacity in the direction of corrugation was significantly higher in case of the non-integrated rectangular core structure compared with that of the integrated structure.

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“…[62][63][64] Compared to other structural forms of lattice materials, the vibration response of integrated hollow sandwich structures is less studied, which is not favorable to the structure against mechanical vibrations. Abedzade Atar et al 65 investigated the effect of structural topology and core-panel integrity on the vibration of the structure. Modal tests and numerical simulations determined the inherent frequencies of the specimens.…”

Section: Integrated Hollow Core Materialsmentioning

confidence: 99%

Design, fabrication, and dynamic mechanical responses of fiber‐reinforced composite lattice materials

Xiong,

Gong,

et al. 2023

Int Journal of Mech Sys Dyn

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Fiber‐reinforced composites are a popular lightweight materials used in a variety of engineering applications, such as aerospace, architecture, automotive, and marine construction, due to their attractive mechanical properties. Constructing lattice materials from fiber‐reinforced composites is an efficient approach for developing ultra‐lightweight structural systems with superior mechanical properties and multifunctional benefits. In contrast to corrugated, foam, and honeycomb core materials, composite lattice materials can be manufactured with various architectural designs, such as woven, grid, and truss cores. Moreover, lattice materials with open‐cell topology provide multifunctional advantages over conventional closed‐cell honeycomb and foam structures and are thus highly desirable for developing aerospace systems, hypersonic vehicles, long‐range rockets and missiles, ship and naval structures, and protective systems. The objective of this study is to review and analyze dynamic mechanical behavior performed by different researchers in the area of composite lattice materials and to highlight topics for future research.

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Free vibration analysis of integrated and non-integrated corrugated core sandwich panels reinforced with weft-knitted fabrics

Cited by 7 publications

References 27 publications

Experimental and numerical study of transverse shear modulus for bioinspired glass fiber‐reinforced polymer sandwich core

Experimental and numerical study of transverse shear modulus for bioinspired glass fiber‐reinforced polymer sandwich core

Determination of corrugated core sandwich panels elastic constant based on three different experimental methods and effect of structural integrity on flexural properties

Design, fabrication, and dynamic mechanical responses of fiber‐reinforced composite lattice materials

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