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69 articles for “shells”
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Chemical Resistance of Coconut Shell-Filled Rubber Vulcanizates
Abstract: In this contribution, the uptake of water, methanol, acetone and toluene at ambient temperature by Coconut Shell-Filled Rubber Vulcanizates as a function of time were studied. The rubber vulcanizate with varying Coconut Shell filler (CSF) concentration of 10 to 50 pphr at 10 pphr interval was prepared using two roll mixing mill and compression moulding process. The effect of filler loading on the percentage uptake of different chemicals (water, methane, …
Published in International Journal of Chemical Engineering and Processing · Vol. 7, Issue 2, 2021 · pp. 37–42 Read article
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Partial Replacement of Coarse Aggregate with Coconut Shell
Abstract: In such a structure, we are studying coconut shell which is a good replacement. It is a concrete or coconut shell that we will study on. We put the coconut shell on the replacement of cement, because coconut shell is very light weight. so instead of concrete we will use it, and in a way, using concrete. It is a non-renewable natural stone aggregate which proves to be very convenient …
Published in International Journal of Metallurgy and Alloys · Vol. 7, Issue 2, 2021 · pp. 29–43 Read article
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Synthesis of Groundnut Shell Composites: Exploring Chemical Reactions for Particle Treatmentand Modification
Abstract: The utilization of groundnut shell particles as a sustainable and economical filler in composite materials has garnered significant interest in recent years. This manuscript presents an in-depth analysis of the chemical processes involved in synthesizing groundnut shell-based composites, with a focus on the treatment and modification of the particles to enhance their compatibility and functional properties. The study investigates various chemical reactions, including acid and alkali treatments, aimed at altering …
Published in International Journal of Chemical Synthesis and Chemical Reactions · Vol. 10, Issue 2, 2025 · pp. 27–32 Read article
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Fatigue Performance of Carbon Fiber Reinforced Hybrid Nanocomposites Modified Using Core-Shell Rubber Particles and Nanosilica
Abstract: This study investigates the fatigue behavior of carbon fiber-reinforced epoxy composites modified with nanosilica, core-shell rubber particles, and a hybrid of both additives. Specifically, the composites were formulated with 10 wt% nanosilica, 10 wt% core-shell rubber particles, and a hybrid containing 10 wt% of each additive. The research aimed to assess how these modifications influence the mechanical performance and fatigue resistance of the composites under cyclic loading conditions. The addition …
Published in International Journal of Composite and Constituent Materials · Vol. 11, Issue 1, 2025 · pp. 8–20 Read article
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Plates, Shells and Their Composite Structures
Abstract: Review of the impact of large nonlinear deformations on plate and shell response. The approach ofmodelling discrete reinforcements and the smeared stiffeners technique suited to stringers with tightspacing are both presented in relation to the analysis of stiffened plates and shells. The behaviour andstrength of plates and shells are demonstrated to be affected by apertures and cut-outs, both locallythrough the localization of stress and globally through the effects on stiffness. …
Published in International Journal of Structural Mechanics and Finite Elements · Vol. 8, Issue 1, 2022 · pp. 11–14 Read article
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Walnut Shells’ Potential Use as Biofillers in Natural Rubber Composites
Abstract: The study assessed the potential of walnut shells as a filler in natural rubber composites. Walnut shells were finely ground, sieved through a 75 μm mesh, and incorporated into natural rubber at different filler loadings: unfilled, 20 parts per hundred rubber (phr), 30 phr, 40 phr, and 50 phr. The physicochemical properties of the walnut shell powder were analyzed, yielding results of 5.30 for pH, 10.10% for moisture content, 2.50% …
Published in International Journal of Polymer Science and Engineering · Vol. 10, Issue 2, 2024 · pp. 1–5 Read article
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Using Six-Node Hexagonal Elements to Perform Free Vibration Analysis of Laminated Composite Conoidal, Elliptical Paraboloid, and Hyperbolic Paraboloid Shells
Abstract: Laminated composite structures are one of the recent developments in the field of engineering with high strength and better cost-to-weight ratio over the isotropic materials. The present study is mainly focused on the free vibration analysis of laminated composite shells using six-node hexagonal elements which is the first one of its kind. Three different shells, namely conoidal, elliptical paraboloid and hyperbolic paraboloid, have been analyzed with different support conditions, and …
Published in International Journal of Structural Mechanics and Finite Elements · Vol. 5, Issue 2, 2019 · pp. 42–55 Read article
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CFD Study on the Effect of Air Bubble Injection Performance of a Horizontal Helical Shell and Coiled Tube Heat Exchanger
Abstract: In present review, a shell and curled cylinder heat exchanger will be numerically considered. The creation technique for helically looped tube which contains turbulator and furthermore the impacts of turbulator on warm and frictional qualities of hotness exchanger will be introduced in this review. CFD examination on ANSYS FUENT programming will be acted in two principle modes. In first mode, the liquid of looped cylinder will be water and in …
Published in International Journal of Mechanics and Design · Vol. 7, Issue 2, 2021 · pp. 1–29 Read article
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Response Surface Methodology to Optimize Deproteinization of Green Crab Shells (Carcinus maenas)
Abstract: The crab shells are used as a feedstock for the extraction of either chitin or chitosan and other bioactive materials such as dyes and proteins. The optimum conditions are required for a process development for an effective separation of chitin. The most important parameters for deproteinization of green crab shells have identified the concentration of NaOH, temperature and time of contact. The optimum conditions for deproteinization of Green crab shells …
Published in International Journal of Chemical Engineering and Processing · Vol. 3, Issue 2, 2017 · pp. 30–37 Read article
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The Potential Application of Walnut Shells as Biofillers for Natural Rubber Composites
Abstract: It was evaluated whether walnut shells should be used as filler in composites made of natural rubber. Samples of walnut shells were ground to fine powders, sieved through a 75 μm mesh, and were used in compounding natural rubber using varying filler loading of unfilled, 20 hpr, 30 hpr, 40 hpr, and 50 hpr. The physicochemical analysis results of the walnut shell powder were 5.30, 10.10%, 2.50%, 43.70%, 49.70 mg/g, …
Published in International Journal of Composite Materials and Matrices · Vol. 8, Issue 2, 2022 · pp. 30–34 Read article
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Utilization of Waste Groundnut Shell Ash in Zero Cement Concrete
Abstract: Currently, geopolymer concrete serves as an excellent alternative to traditional plain cementconcrete, as it is produced without using ordinary Portland cement. Different source materials suchas fly ash, rice husk ash, metakaolin, red mud etc. are preferred to act as the main source forgeopolymer production. In this work, a new innovative waste material such as groundnut ash isutilized as the source material for the manufacture of geopolymer concrete by considering thestrength, …
Published in International Journal of Concrete Technology · Vol. 10, Issue 1, 2024 · pp. 9–17 Read article
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Effect of Groundnut Shell Ash Lime on Characteristics of Soil
Abstract: Soil is one of the foremost commonly encountered materials in engineering. However black cotton soils are excellent for agriculture purpose, they are not so good for laying durable roads and construction of buildings. Soil stabilization is additionally how to treat a soil to wish care of, alter or improve the performance of soil. A test examination is apportioned to ascertain the effect of Ground Nut Shell Ash mixed with Lime …
Published in International Journal of Landscape Planning and Architecture · Vol. 7, Issue 1, 2021 · pp. 15–20 Read article
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Effect of Compatibilizers on Polypropylene-Based Peanut Shell Flour Composites Reinforced with Nanoclay
Abstract: The improvement of innovative ingredients is on the rise, especially in the automobile, aerospace, aviation, and construction industries. Conventional ingredients are being substituted with nanocomposite ingredients due to their excellent features. In this study, various composites based on polypropylene (PP), peanut shell flour (50 wt% PSF), and nanoclay (Cloisite 30B) were manufactured by melt mixing process followed by injection molded in the presence of maleated PP (PPM) and maleated styrene …
Published in International Journal of Nanomaterials and Nanostructures · Vol. 8, Issue 2, 2022 · pp. 1–13 Read article
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Experimental Optimization of Process Parameters for Tape Wound Composite Cylindrical Shells by using Taguchi Method
Abstract: The purpose of this paper is to design and construct laminated composite cylindrical shells. Tape wound layup method is implemented for the preparation of composite laminated shells by E-glass fiber mat and Epoxy resin as adhesive. The shells were made by considering two parameters p1-diameter of mandrel and parameter p2- stacking sequence. As per the L9 orthogonal array the required diameter and stacking sequence was arranged. The composite shells were …
Published in International Journal of Composite Materials and Matrices · Vol. 5, Issue 2, 2019 · pp. 18–26 Read article
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Comparative study of the Magnetoelectric Properties in Core-Shell Nanocomposites as well as mixture of CoFe2O4:BaTiO3
Abstract: Nanostructures of multiferroic materials have been drawing increasing curiosity due to the boosted magnetoelectric coupling and potential for succeeding generation multifunctional devices. Composites of ferroelectric and magnetostrictive materials indicate more magnetoelectric coupling than single phase materials. Core-shell CoFe2O4:BaTiO3 nanocomposites (1:1 weight ratio) and a mixture of both of them have been produced by a combination of hydrothermal and sol gel techniques. X ray diffraction analysis endorses the presence of both …
Published in International Journal of Composite and Constituent Materials · Vol. 1, Issue 1, 2015 · pp. 1–6 Read article
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Influence of GGBFS Content and Curing Methods on the Compressive Strength of Coconut Shell Concrete: A Mix Design Approach for Sustainable Construction
Abstract: AbstractThis study explores the development of a coconut shell concrete (CSC) mix design using theACI211.298 guidelines, targeting a compressive strength of 20 MPa for structural applications. Dueto the organic and flaky properties of coconut shell (CS), achieving the initial target strength of 40MPa was challenging, necessitating a focus on optimizing mix proportions for a 20 MPa goal. Theresearch investigates three different mixes with varying percentages of ground granulated blastfurnace slag …
Published in International Journal of Structural Engineering and Analysis · Vol. 10, Issue 2, 2024 · pp. 9–14 Read article
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Enhancement of Heat Transfer Coefficient in Shell and Tube Heat Exchanger Using 1-Butyl-3-Methylimidzaolium Bromide
Abstract: Improvement in heat transfer coefficient in heat exchanger plays very important energy saving role in the industries. In this study the effect of ionic liquid on HT coefficient was studied using a lab scale shell and tube heat exchanger (length-39 cm, shell diameter 9 cm, Tube diameter 0.62 cm). Also the effect of cold and hot flow rate on heat transfer coefficient, Effect of mass concentration of ionic liquid was …
Published in International Journal of Chemical Separation Technology · Vol. 2, Issue 1, 2016 · pp. 11–18 Read article
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Optimization of Compressive Strength of Snail Shell Ash Blended Cement Concrete
Abstract: In this paper, a mathematical model is developed to optimize the compressive strength and the corresponding values of the mixture proportions of snail shell ash blended cement concrete using Scheffe’s regression method.A computer program written in qbasic language was invoked to quicken the selection of the cheapest mix ratios and the corresponding value of compressive strength of concrete. The mix ratio that optimized the compressive strength was found to be …
Published in International Journal of Construction Engineering and Planning · Vol. 6, Issue 2, 2020 · pp. 29–37 Read article
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Mathematical Model to Monitor Concrete Compressive Strength Partially Replaced with Periwinkle and Palm Kernel Shell as Aggregate
Abstract: This research work monitor that application of periwinkle and palm kernel shell as partial replacement for aggregate, the study are carried out applying modeling and simulation techniques, concrete are normally heterogeneous in most cases, but the study try to examine the growth rate of the material on their compressive strength, such process were carried out using these two locally sourced material at different percentage of replacement for aggregate, the study …
Published in International Journal of Construction Engineering and Planning · Vol. 9, Issue 2, 2023 · pp. 6–28 Read article
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Prediction of Compressive strength of Periwinkle Shell Aggregate Concrete Using a Quadratic Polynomial Function
Abstract: In this study, a mathematical model is developed to predict the compressive strength of normal concrete made with periwinkle shell as coarse aggregate using a quadratic polynomial function. The response function is expressed as a multivariable function of the proportions of the component materials (water, ordinary Portland cement, sand and periwinkle shell). A total of thirty experimental runs were used to demonstrate the applicability of the mathematical model developed. The …
Published in International Journal of Concrete Technology · Vol. 6, Issue 2, 2020 · pp. 10–21 Read article