Buckling Analysis of Advanced Grid Stiffened Composite Cylinders

Lim, Kang Hee; He, Wei; Guan, Zhenyu

doi:10.4028/www.scientific.net/amr.875-877.755

Cited by 9 publications

(5 citation statements)

References 10 publications

(7 reference statements)

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“…In this result, we can obtain the optimized variables in case of 36-52 grids and more than 5 of h/w ratio. Based on previous study [5], we can know that the bigger the h/w ratio, the higher the buckling load. So, this study changed the h/w ratio as 3-19 and re-calculated this progress, and obtained better optimized variables, as shown in Fig.…”

Section: Resultsmentioning

confidence: 97%

“…Based on previous study [5], Iso-grid has a relatively good mechanical properties. So, Iso-grid was applied as a geometric model in this study.…”

Section: Geometric Modelmentioning

confidence: 92%

“…Angle-grid structure and Ortho-grid structure consist of 2 direction grids, Iso-grid structure and Kagome-grid structure consist of 3 direction grids and Orthotropic-grid structure consist of 4 direction grids. These five types of grid structure were studied in the previous study [5,6], as shown in Fig. 1.…”

Section: Types Of the Grid Structurementioning

confidence: 99%

See 2 more Smart Citations

Optimal Design of Advanced Grid Stiffened Composite Cylindrical Shell

Lim

Xing

Guan

2013

AMM

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Advanced Grid Stiffened (AGS) composite cylindrical shells are widely used in aerospace industry. Firstly, the buckling loads for various types of grid structures of AGS composite cylindrical shells were analyzed, and Iso-grid AGS type was selected as a study object which has generally good performance for all conditions. In this study, whole structure weight of the Iso-grid cylindrical shell was kept constant, in which condition the design variables such as grid angle, number of grids, grid height and grid thickness were controlled. Secondly, these variables were optimized by Optimal Latin Hypercube of the DOE method, using Isight. There has two objective functions, one is weight of the structure (for target value), and the other is buckling load (for maximum value). This study was performed through finite element analysis using Abaqus and the accuracy of the analysis was verified by previous studies. Finally, based on the result of numerical simulation, a variable of the skin thickness was added and analyzed whole scale of the AGS composite cylinder. The result shows the influence of each variable on the structure, which can be applied to the optimization of grid structure design, and is also very helpful for reducing the computational cost and obtaining optimization values more accurately.

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Section: Resultsmentioning

confidence: 97%

“…Based on previous study [5], Iso-grid has a relatively good mechanical properties. So, Iso-grid was applied as a geometric model in this study.…”

Section: Geometric Modelmentioning

confidence: 92%

See 1 more Smart Citation

Optimal Design of Advanced Grid Stiffened Composite Cylindrical Shell

Lim

Xing

Guan

2013

AMM

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“…Therefore, composite grid structures have high damage tolerance. [9][10][11][12][13][14][15][16] Several experimental and analytical studies have been carried out on the mechanical performance of composite grid structures. Gan et al 17 investigated the energy absorption characteristics of composite grid panels (CGPs) under three-point bending.…”

Section: Introductionmentioning

confidence: 99%

Flexural performance of composite grid panels with deep ribs

Chen

Fang

Gao

et al. 2020

Journal of Reinforced Plastics and Composites

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This paper reports on the flexural performance of an innovative composite grid panel composed of glass fiber-reinforced polymer face skins and deep glass fiber-reinforced polymer ribs with a trapezoidal cross-section. Three-point and four-point bending experiments were performed to demonstrate the feasibility of the composite grid panels under concentrated loads. Compared with the composite grid panels without skins, maximum increases in the ultimate load, and initial bending stiffness of the composite grid panels of approximately 68.2% and 306.7%, respectively, were achieved with the existence of both upper and lower skins. Furthermore, an analytical analysis was carried out to predict the initial bending stiffness and mid-span deflection of the composite grid panels. A comparison of the analytical and experimental results showed that the analytical model accurately predicted the flexural performance of the composite grid panels subjected to three-point and four-point bending. Failure mechanism maps were constructed to predict the mechanical response and failure modes of the composite grid panels. Moreover, the validated model was used in a parametric analytical study to further estimate the effects of various parameters on the flexural performance of the composite grid panels. The results demonstrated that the initial bending stiffness can be significantly improved by increasing the trapezoidal section ratio, face skin thickness, and grid height.

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“…The anisogrid lattice concept is characterized by a relatively dense system of intersecting diagonal and transverse ribs forming a regular pattern of hexagonal or triangular cells. [11][12][13][14] So far, several investigations have been carried out in relation to the mechanical properties of GSC structures under various loading. [15][16][17] Gan et al 15 investigated the ability of energy absorption in isogrid composite panels include rib-skin system under quasi-static transverse loading.…”

Section: Introductionmentioning

confidence: 99%

Investigation on the flexural response of multiscale anisogrid composite panels reinforced with carbon fibers and multi-walled carbon nanotubes

Eslami‐Farsani

Shahrabi-Farahani

2017

Journal of Composite Materials

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Grid stiffened composite structures have been maturely developed in aircraft and automobile industries due to their excellence properties such as high specific strength, high specific stiffness, excellent energy absorption capability and corrosion resistance. In the current investigation, the effect of multi-walled carbon nanotubes addition in various weight percentages (0, 0.1, 0.25 and 0.4) on the flexural response of anisogrid composite panels was evaluated. For fabrication of the composite specimens, hand lay-up method was used where plain weave E-glass fibers and unidirectional carbon fibers impregnated to the epoxy resin that modified with multi-walled carbon nanotubes were used in the skin and rib parts, respectively. Experimental results from three-point bending test showed that with the addition of 0.4 wt.% of multi-walled carbon nanotubes, the maximum flexural load, flexural stiffness and energy absorption of anisogrid composite panels increased by 24%, 35% and 25%, respectively. Microscopic analyses revealed that the improvement in the flexural properties of anisogrid composite panels with the addition of multi-walled carbon nanotubes was due to improvement in the interfacial properties of matrix and fibers.

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Buckling Analysis of Advanced Grid Stiffened Composite Cylinders

Cited by 9 publications

References 10 publications

Optimal Design of Advanced Grid Stiffened Composite Cylindrical Shell

Optimal Design of Advanced Grid Stiffened Composite Cylindrical Shell

Flexural performance of composite grid panels with deep ribs

Investigation on the flexural response of multiscale anisogrid composite panels reinforced with carbon fibers and multi-walled carbon nanotubes

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