Stress, deflection, and frequency analysis of CNT reinforced graded sandwich plate under uniform and linear thermal environment: A finite element approach

Mehar, Kulmani; Panda, Sidhartha; Patle, B.K.

doi:10.1002/pc.24409

Cited by 41 publications

(15 citation statements)

References 56 publications

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“…Sequential to the fiber preparation, it was chemically treated with an alkaline solution to improve the properties of the reinforcement [17]. The schematic diagram of the hand layup fabrication technique is shown in Figure 3.…”

Section: Experimental Methodsmentioning

confidence: 99%

Thermal and Flame Retardant Behavior of Neem and Banyan Fibers When Reinforced with a Bran Particulate Epoxy Hybrid Composite

et al. 2021

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Awareness of environmental concerns influences researchers to develop an alternative method of developing natural fiber composite materials, to reduce the consumption of synthetic fibers. This research attempted testing the neem (Azadirachta indica) fiber and the banyan (Ficus benghalensis) fiber at different weight fractions, under flame retardant and thermal testing, in the interest of manufacturing efficient products and parts in real-time applications. The hybrid composite consists of 25% fiber reinforcement, 70% matrix material, and 5% bran filler. Their thermal properties—short-term heat deflection, temperature, thermal conductivity, and thermal expansion—were used to quantify the effect of potential epoxy composites. Although natural composite materials are widely utilized, their uses are limited since many of them are combustible. As a result, there has been a lot of focus on making them flame resistant. The thermal analysis revealed the sample B was given 26% more short-term heat resistance when the presence of banyan fiber loading is maximum. The maximum heat deflection temperature occurred in sample A (104.5 °C) and sample B (99.2 °C), which shows a 36% greater thermal expansion compared with chopped neem fiber loading. In sample F, an increased chopped neem fiber weight fraction gave a 40% higher thermal conductivity, when compared to increasing the bidirectional banyan mat of this hybrid composite. The maximum flame retardant capacity occurred in samples A and B, with endurance up to 12.9 and 11.8 min during the flame test of the hybrid composites.

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Section: Experimental Methodsmentioning

confidence: 99%

Thermal and Flame Retardant Behavior of Neem and Banyan Fibers When Reinforced with a Bran Particulate Epoxy Hybrid Composite

et al. 2021

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“…Besides, the in-plane zero Poisson's ratio feature is required for this type of wings to prevent them from any excessive stress and strain during one-dimensional morphing. During recent years, there have been different honeycomb structures which were proposed for the morphing wing applications [2,3]. Generally speaking, the honeycomb structures have attractive mechanical properties and have been widely used in many lightweight structures including aircraft structures [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Design and characterization of an orthotropic accordion cellular honeycomb as one-dimensional morphing structures with enhanced properties

Farrokhabadi

Ashrafian

Fotouhi

2022

Jnl of Sandwich Structures & Materials

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This study develops the governing equations and characterizes the mechanical properties of a new orthotropic accordion morphing honeycomb structure containing periodic arrays of U-type beams reinforced with glass fibers. Castigliano's second theorem is modified to develop the analytical equations to predict the deformation behavior of a single orthotropic ply under a combined axial, bending and shear loadings. Accordingly, the elastic properties of the orthotropic structure including elastic stiffness, shear stiffness and in-plane Poisson’s ratios are calculated by the developed equations. The honeycomb structure is manufactured by 3D printing, and the samples are subjected to tensile tests to experimentally validate the analytical solutions. Multiple finite element simulations are also used to validate the results. A good agreement is observed between the analytical solution, the experiments, and simulations, confirming the robustness of the analytical solution to predict the full elastic properties of the composite cellular. The results show that the periodic arrays of U-type and vertical beams can generate low in-plane stiffness in the morphing direction and high in-plane stiffness in the transverse direction, respectively. A zero Poisson’s ratio feature is achieved by employing straight beams which result in a high stiffness in the perpendicular direction. The proposed accordion cellular honeycomb structure exhibits the flexible response along the accordion shape direction, with a significant stiffness in its transverse direction. Moreover, the new orthotropic structure has considerably greater strain to failure in the morphing direction compared with a conventional isotropic configuration. These features prove that this type of structure can be applied for the aerospace morphing structures such as wings.

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“…Mehar et al. 27 used the finite element method to analyze natural frequencies under uniform and linear thermal loads. Riccio et al.…”

Section: Introductionmentioning

confidence: 99%

Modal analysis of cylindrical panels at elevated temperatures under nonuniform heating conditions: Experimental investigation

Twinkle

Nithun

Pitchaimani

et al. 2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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In this study, experimental investigations carried out to analyze the influences of different in-plane temperature variations on buckling and free vibration responses of metal and fiber-reinforced laminated composite cylindrical panels are presented. Initially, critical buckling temperature is calculated then free vibration analysis is performed as a function of the buckling temperature to analyze the changes in the natural frequencies and mode shapes. Experimental results revealed that the thermal buckling strength of the panel is significantly influenced by the nature of the heating condition. Similarly, significant changes in free vibration mode shapes are observed with the rise in temperature and also according to the heating conditions. It is also observed that, with the increase in temperature, nodal and anti-nodal lines of free vibration modes shifting towards the heating source. The experimental results are compared with the numerical simulation for the studies on the isotropic cylindrical panel and both the results are in good agreement.

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Stress, deflection, and frequency analysis of CNT reinforced graded sandwich plate under uniform and linear thermal environment: A finite element approach

Cited by 41 publications

References 56 publications

Thermal and Flame Retardant Behavior of Neem and Banyan Fibers When Reinforced with a Bran Particulate Epoxy Hybrid Composite

Thermal and Flame Retardant Behavior of Neem and Banyan Fibers When Reinforced with a Bran Particulate Epoxy Hybrid Composite

Design and characterization of an orthotropic accordion cellular honeycomb as one-dimensional morphing structures with enhanced properties

Modal analysis of cylindrical panels at elevated temperatures under nonuniform heating conditions: Experimental investigation

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