Experimental Study on Mechanical Properties of the Sandwich Composite Structure Reinforced by Basalt Fiber and Nomex Honeycomb

Li, Zongwen; Ma, Jianxun

doi:10.3390/ma13081870

Cited by 33 publications

(20 citation statements)

References 32 publications

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“…The influence of the elastic properties of facings on the elastic properties of sandwich panels was analytically confirmed in the works [45,46]. The same relationships were also confirmed in three-point bending tests of isotropic cell plates with an aluminium core with hexagonal cells [47] and sandwich composite structures reinforced by basalt fibre and Nomex honeycomb [26]. Similar relationships were also observed during bending of laminated beams made of wood materials in which the cladding was reinforced with glass fibre [48] or laminated paper [22].…”

Section: Mechanical Properties Of Multilayered Beamssupporting

confidence: 59%

“…In the multilayer structure of the panels, facings contribute the most to the bending stiffness of the structure, and the main role of honeycomb is to provide out-of-plane support. Moreover, the failure characteristics of experimental specimens are ductile, and the sandwich structure, thanks to the core structure, still has a small amount of bearing capacity and maintains structural integrity [ 26 , 27 , 28 , 29 , 30 ]. A finite element method could be used to analyse the strength of a bonded sandwich beam with a corrugated core and the crack expansion in the multilayer structure [ 31 , 32 , 33 ].…”

Section: Introductionmentioning

confidence: 99%

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Bending Behavior of Lightweight Wood-Based Sandwich Beams with Auxetic Cellular Core

Peliński

Smardzewski

2020

Polymers

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The work concerns a three-point bending test of beams made of plywood, high density fibre boards, cardboard, and wood-epoxy mass. The goal of the investigation was to determine the effect of thickness and type of wood-based facings on stiffness, strength, ability to absorb, and dissipate the energy of sandwich beams with an auxetic core. The cognitive goal of the work was to demonstrate the possibility of using recycled materials for facings and cores instead of popular wood composites. Experimental studies and numerical calculations were performed on correctly calibrated models. Experimental studies have shown that the beams with HDF facings (E = 1528 MPa, MOR = 12.61 MPa) and plywood facings (E = 1248–1395 MPa, MOR = 8.34–10.40 MPa) have the most favourable mechanical properties. Beams with plywood facings also have a good ability to absorb energy (1.380–1.746 J), but, in this respect, the beams manufactured of HDF (2.223 J) exhibited better capacity. The use of an auxetic core and facings of plywood and cardboard significantly reduces the amount of dissipated energy (0.0093 J, 0.0067 J). Therefore, this type of structures can be used for modeling beams carrying high deflections.

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Section: Mechanical Properties Of Multilayered Beamssupporting

confidence: 59%

Section: Introductionmentioning

confidence: 99%

Bending Behavior of Lightweight Wood-Based Sandwich Beams with Auxetic Cellular Core

Peliński

Smardzewski

2020

Polymers

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“…The polymer hexagonal HC core panel is constructed such that the principal fiber direction is aligned with the x -axis of the structure. This allows the HC core structure to have greater strength under the shear and flexural loading condition in that direction [ 43 ]. The resistance to buckling of the HC cells construction is of primary concern in the out-of-plane compression and shear loading of the polymer HC core.…”

Section: Framework For Fe Simulation Of Damage and Failure Of Honementioning

confidence: 99%

Representative Cell Analysis for Damage-Based Failure Model of Polymer Hexagonal Honeycomb Structure under the Out-of-Plane Loadings

et al. 2020

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The honeycomb (HC) core of sandwich structures undergoes flexural loading and carries the normal compression and shear. The mechanical properties and deformation response of the core need to be established for the design requirements. In this respect, this article describes the development of the smallest possible representative cell (RC) models for quantifying the deformation and failure process of the Nomex polymer-based hexagonal HC core structure under the out-of-plane quasi-static loadings. While the hexagonal single and multi-cell models are suitable for the tension and compression, a six-cell model is the simplest RC model developed for shear in the transverse and ribbon direction. Hashin’s matrix and fiber damage equations are employed in simulating the failure process of the orthotropic cell walls, using the finite element (FE) analysis. The FE-calculated load–displacement curves are validated with the comparable measured responses throughout the loading to failure. The location of the fracture plane of the critical cell wall in the out-of-plane tension case is well predicted. The wrinkling of the cell walls, leading to the structural buckling of the HC core specimen in the compression test, compares well with the observed failure mechanisms. In addition, the observed localized buckling of the cell wall by the induced compressive stress during the out-of-plane shear in both the transverse and ribbon direction is explained. The mesoscale RC models of the polymer hexagonal HC core structure have adequately demonstrated the ability to predict the mechanics of deformation and the mechanisms of failure.

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“…The AH structures are of demonstrative advantages of lightweight, excellent load bearing capacity and EA efficiency, which has been extensively used as energy absorbers in automotive, railway, naval, and aerospace industries. The experimental methods [13,14] analytical methods [15], and numerical methods [16,17] are generally used to test the mechanical properties of the honeycomb materials. Due to the good crushing effect of honeycomb on the outside, a large number of experimental studies have been conducted on its dynamic compressive strength, and it is found that the thickness [18], side length [19,20], and impact velocity [21] has the most obvious influence on the EA characteristics of the material.…”

Section: Introductionmentioning

confidence: 99%

Improving the Buffer Energy Absorption Characteristics of Movable Lander-Numerical and Experimental Studies

et al. 2020

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To improve the soft-landing crash performance of the movable lander (ML), this study presents an investigation of a newly designed gradual energy-absorbing structure subjected to impact loads using an ML for theoretical calculation and numerical simulations. In this work, we present a novel computational approach to optimizing the energy absorption (EA) of the ML. Our framework takes as inputting the geometrical parameter (GP) as well as EA. The finite element model of the HB1, HB2, and HB3 was established and effectively verified using numerical simulation and experimental data. The relationship between the GP of the buffer material and the EA was obtained through static experiment and impact experiment, and the cushioning performance of the lander was optimized according to the ML load mass, contact speed, and EA function. According to the optimization results, we chose an outer diameter of 240 mm, an inner diameter of 50 mm, heights of HB1 = 140 mm, HB2 = 110 mm, and HB3 = 225 as the collocation, and completed the numerical simulation of three different cases. By comparing the results of theoretical calculation and numerical simulation experiments, it can be found that the overload response rates of the main body in 4 type landing, 2-2 type landing, and 1-2-1 type landing are 4.72 G, 2.61 G, and 2.33 G, respectively. It also laid the foundation for the theoretical and methodological research of the ML and manned lander in the future.

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Experimental Study on Mechanical Properties of the Sandwich Composite Structure Reinforced by Basalt Fiber and Nomex Honeycomb

Cited by 33 publications

References 32 publications

Bending Behavior of Lightweight Wood-Based Sandwich Beams with Auxetic Cellular Core

Bending Behavior of Lightweight Wood-Based Sandwich Beams with Auxetic Cellular Core

Representative Cell Analysis for Damage-Based Failure Model of Polymer Hexagonal Honeycomb Structure under the Out-of-Plane Loadings

Improving the Buffer Energy Absorption Characteristics of Movable Lander-Numerical and Experimental Studies

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