The present investigation was made to study the effect of fibre orientation and fibre loading on flexural properties, free vibration characteristics and moisture absorption behaviour of sida acuta fabric reinforced epoxy matrix composite. Sida acuta composites were fabricated to 0, 24, 28 and 32 wt.% of fibre loading and each with 0°/90° and ±45° fibre orientations using hand layup method. Flexural

The aluminium-based metal matrix composites have been developed with titanium carbide (TiC) and boron carbide (B4C) material as reinforcement. The weight percentage of TiC (1.5%) and B4C (0.5%) powder has been constantly maintained throughout the process for composite development. The composite process parameters such as powder compaction pressure, sintering temperature and time are varied in different

The use of recycled coarse aggregate (RCA) in natural aggregate concrete (NAC) is a sustainable solution to the problem of solid waste worldwide. The purpose of this paper is to produce concrete with RCA substituting NAC. The effects of RCA gradation, RCA content, fly ash content and water cement ratio (w/c) on mechanical properties of RAC are studied. The stress-strain curves of each specimen after

Fly ash is the main solid waste produced from coal-fired power plants, which has been extensively used as a mineral admixture for concrete and cement. In this paper, the effects of fly ash on the compressive strength, water resistance, setting time, phase composition and microstructure of magnesium oxysulfate (MOS) cement modified by 0.5% sodium dihydrogen phosphate (NaH2PO4) were investigated. X-ray

A Nd-Hg complex [Nd(IA)2(H2O)3(NO3)(HgCl2)] n ·2nH 2 O·nEtOH (1; IA is isonicotinic acid anion) was synthesized and characterized. Compound 1 is of monoclinic system, space group C2/c with a = 25.4224(12), b = 8.1410(3), c = 22.2963(9) Å, β = 90.788(4)°, V = 4614.1(3) Å3, C14H24Cl2HgN3NdO13, Z = 8, M r = 858.09, D c = 2.471 g/cm3, S = 1.120, μ(MoKα) = 9.174 mm−1, F(000) = 3256, R = 0.0530 and wR =

Microstructural characterization of Al6063 Nanocomposites plays a vital role in the field of Materials Engineering. Many of the earlier researches showed that the evolution of Al6063 stabilized the application in wide fields of engineering and sciences. The present research has focused to probe the Al6063 nanocomposite using X-ray diffraction (XRD), Transmission Electron Microscopy (TEM) and Scanning

Clove essential oil (CEO) was added to Salvia hispanica mucilage-protein rich fraction in an attempt to design natural and biodegradable packaging film with good physical, optical and mechanical properties. The effects of polymers concentration (PC) (1.0-3.0%, w/v), CEO concentration (0.1-1.0%, v/v), and pH (7-10) were evaluated using a face-centered central composite design. The films corresponding

In this paper, the results of a recent study on the environment-induced damage behavior of aluminum alloy 2024-T3, which is often a preferred choice for use in a spectrum of aircraft structural applications is presented and discussed. Accelerated corrosion tests by way of exposure of test specimens of the alloy to an aggressive aqueous environment were carried out at ambient temperature (27°C). A numerical

Hammer mills are widely used for grinding grain products. Screens are one of the important machine components that affect the performance of hammer mills. Generally, round hole screens are used in hammer mills. In this study, it is investigated the effects of oblong and round hole screens on a hammer mill performance. Results showed that the mean geometric diameter, geometric standard deviation, specific

Fatigue fracture is the one of the most common failures of mechanical components. This is caused by the initiation and growth of cracks. In this study, mixed mode-I/III fatigue crack growth is studied experimentally and numerically for cylindrical specimen with a stress ratio R = 0.1 for both loading. Digital camera was used to monitoring the crack growth path in the experimental studies. The crack

In many studies, computer-aided simulation methods used to design of Vertical Axis Wind Turbine. Compared to conventional optimization methods, computer-aided optimization methods, which show continuous improvement in parallel with technology, provide important advantages especially in terms of time and cost. On the one hand, the wind turbine is designed to obtain maximum power, on the other hand,

Gamma radiations have destructive effects on persons who exposed to them and can cause damaging the healthy tissues. Therefore, shielding materials are necessary for protecting them. For this purpose, attenuation characteristics of the S-type glass namely, Soda-Lime-Silica glass which is doped with Sb2O3 were obtained by the MCNPX code and the results were compared to the XCOM software findings. The

Radiation shielding is a popular subject in physics due to its widely utilization in different fields in the paralel of technological development and thus recently many recearches have focused in this subject. Most of works were performed using simulation code as experimental studies are more difficult and required technical setup. The simulation works performed in this study to obtain radiation shielding

In the study, the CASTEP module is used to construct and calculate eight configurations of the orthorhombic structure CH3NH3PbI3-x Br x (x = 0.00, 0.25, 3.00) as new energy materials. We use the GGA+PBE functional to investigate the physical properties of the eight configurations. When x = 0.25, the most stable structure is determined by comparing the final energies of CH3NH3PbI2.75Br0.25 with different

Across a range of manufacturing contexts, automated quality control has been gaining significant attention because it offers competitive advantages such as cost reduction, high accuracy in defect detection, and system stability over time. Although computer vision has historically been the most commonly applied method in this context, novel approaches such as deep learning have recently become more

Augmented reality (AR), a mixture of virtual reality and reality in a computerized virtual object mounted on real environments, has been used extensively in educational studies in recent years. This study analyzed the use of mobile AR application (AR Tool) in a technical drawing course formatively to evaluate its usefulness on fourty engineering students that were failed from the technical drawing

Effective heat transfer in system components is extremely important for organic Rankine cycles (ORC). The efficiency of heat transfer in condenser and evaporator in ORC causes high efficiency in ORC. Plate heat exchangers can be used as the evaporator and condenser of an ORC system. Because, the plate heat exchangers have high heat transfer rate. For this reason, heat exchangers can be one of the important

Structural capacitors are multifunctional structural materials that provide structural strength and energy storage together and aim to greatly reduce the weight of the system. In this paper, the effect of the dielectric separator materials such as polyvinyl chloride (PVC) and biaxially oriented polypropylene (BOPP), weave structure of carbon fabric and thickness of dielectric material on multifunctional

Hot rolling process is a very intense energy consuming process and deformation energy is one of the major cost items. Deformation energy consumed in hot rolling process is highly related with the design of the roll pass sequence. In this study, response surface methodology (RSM) is utilized to optimize minor geometric parameters i.e. radii and angle in a box pass design. Set values of the independent

In this study, fully recyclable and elastic-plastic deformable sandwich panels were developed by considering the mass production requirements as well as the light-weighting needs of the automotive industry. Expanded Polypropylene (EPP) foam core and Self-Reinforced Polypropylene (SRPP) thermoplastic composite face sheets were selected to produce sandwich panels. Three-point bending experiments were

Unbleached cellulose obtained from corncobs were used to synthesize cellulose nanocrystals (CNC). Corncobs are an agro-industrial residue has a high cellulose content and can be used as a raw material to obtain CNC. The cellulose was extracted from the corncobs by means of delignification in two stages, the first stage consisted of a pulping process with ethanol and acetic acid (organosolv method)

The study was aimed to develop low cost composites with high specific strength and better performance by incorporating agro waste as reinforcements. Stir casting technique was adopted for fabricating the composites with Al 4032 as matrix material and (0,2,4,6) Wt.% of RHA as reinforcements. The mechanical properties of the produced composites were investigated and wear rate under dry conditions was

In this article, mechanical properties and ballistic performance of friction-stir- welded magnesium alloy (AZ31B) have been studied using numerical and experimental techniques. Tensile properties and microhardness of the weldment were determined as per the ASTM E08 and E384-05 standards. Tensile properties and microhardness of the weldments are observed to be lesser than the Base Metal (BM). Microstructure

The polypyrrole is a conducting polymer prepared by chemical route. The diffuse reflectance measured in the wavelength range (300 – 2500 nm) permitted to calculate the refractive index (n), extinction coefficient (k), dissipation factor (tan δ) and relaxation time (τ). The optical band gap (Eg) was evaluated from the dielectric and conductivity properties, its value (1.01 eV) was confirmed by using

This study appears to be the first attempt to use a novel microencapsulated apricot kernel powder (MAKP) to improve diabetes and obesity-related parameters in serum and liver tissue of normal and cafeteria diet-fed rats. For this purpose, bitter apricot kernel powder (AKP) was microencapsulated within maltodextrin matrix under optimized conditions and the effects of treatment with microencapsulated

Cu4Cl4(2,2′-bpy)2 (1) (bpy = bipyridine) was obtained and characterized. It crystallizes in triclinic system P(-1) space group. It is a discrete motif. Cu1 is bound by two nitrogen atoms and two chloride ions, generating a tetrahedron. Cu2 is bound by two chloride ions to generate a line. A Cu4Cl4 moiety is generated by four chloride and four cuprous ions, and connects to two 2,2′-bpy to generate a

The present paper studies the effects of local field fluctuations on effective electromechanical coupling coefficients of piezoelectric composites containing short fiber. Finite element method is applied to study the overall behaviour of such composites. Geometric models containing spheroid inclusion of two fiber arrangements SC and BCC are modelled with finite element method to predict the effective

Natural fibers are known for their bio-degradable and abundant availability which makes it a potential replacement for synthetic fibers. An attempt is made in this work to study the thermal buckling behavior of a Jute fiber reinforced epoxy polymer matrix composite plate. A numerical model is developed to study the thermal buckling behavior of composite using commercial finite element analysis software

In 2005, Dennard Scaling which had hitherto delivered the performance enhancement of IC Chips completely collapsed. Hence the need for new material and material research emerged. Graphene 2D has emerged as the device material and hBN-2D has emerged as the ideal substrate material. For ongoing Digital Revoluton to sustain, we need Petab/s and Exob/s transmission links. Graphene technology has matured

This study has been conducted to analyze the effects of turning the Inconel X-750 superalloy, which is a member of nickel-based superalloy family that is frequently preferred in aerospace and nuclear energy industries in particular, under Minimum Quantity Lubrication (MQL), cryogenic liquid nitrogen (LN2) and carbon dioxide gas (CO2) cooling/lubrication conditions, with different cutting speeds (Vc=

The tungsten inert gas (TIG) welding process which is applied with an active flux deposited on the work piece surface just before the welding was called as activated flux TIG (A-TIG) welding. The layer deposition can be achieved by brushing or spraying over the surface and welding is carried out after it dries out. This process has shown that it is possible to increase weld penetration and productivity

This paper aims to study the effect of Te on the morphology and composition characteristics of the Te bearing solid solution in the Y1Cr17 stainless steel. By adding various quantities of Te powders to steel, the smelting experiments were carried out with a tube electric furnace. And two- and three-dimensional morphologies of sulfide inclusions in the steel along with elemental concentrations were

The effect of alloy disorder on direct and indirect band-gap energies in CdSxTe1-x semiconducting alloys has been investigated. The calculations are performed using a pseudopotential approach within the virtual crystal approximation (VCA). In the simplest approximation based on the VCA, the fundamental band-gap bowing of CdSxTe1-x is found to be in disagreement with that of experiment. The value of

Sulfate erosion is one of the important factors causing the decline of concrete durability, and it is also one of the most environmentally damaging and most influential environmental erosion. In view of the problem that the durability of fiber reinforced concrete decreased due to sulfate attack, according to the natural environmental conditions in western China, the rapid corrosion test of fiber (layered

Gamma-photon and neutron shielding effectiveness of borosilicate glasses with alumina in the chemical structure 40SiO2.10B2O3.xBaO.(45-x)CaO.5Al2O3.yZnO.zMgO glasses: 20≤ x ≤ 40 mol% and y=z=6 wt% were evaluated. The investigated glasses were coded as BCBSA-20B (BaO=20 mol%) to BCBSA-40B (BaO=40 mol%). The results showed that the MAC increased when (BaO) increased in the samples and arranged in order

In this study, a novel crash box idea was presented, including a step by step collapsible structure by joining coaxial tubes with gradual bonding surface areas. This telescopic crash box was absorbed to impact energy by sequentially fracturing adhesive interfaces from the top tube to the back tubes. In each bonding interface fracture, a certain amount of the impact energy was reduced. This gradually

The long-term structural performance of roads is mainly governed by the characteristics of subgrade soil. Subgrades with high compressive clays are one of the challenging aspects worldwide. Expansive soils swell and shrink due to moisture variations. Such variations cause serious structural failures, commercial losses, and fatalities worldwide. One of the most effective and economical methods to improve

Potassium-doped Li3VO4 sample is synthesized by conventional Solid-state reaction technique. X-ray Diffraction results show polycrystalline behaviour of K-doped Li3VO4. It was also observed that Li+ did not show its presence in the diffraction pattern which explains that K+ ions are well substituted in the interstitials and did not disturb the planes of Li3VO4 matrix. Presence of K+ in Li3VO4 matrix

In the world, where natural resources are rapidly decreasing, an activity in which developed and developing countries act with a common mind is the reutilization of the wastes with recycling methods. In the study, cracks and breaks did not occur due to the harmony of the materials in the mixture according to the experimental results applied to wood powder, polypropylene and quartz. As the amount of

Today, with the increasing sensitivity to environmental issues, bio-based materials are needed as an alternative to traditional materials. Rosin is used for bio-material production due to its abundance in nature and being cheap. This study aims to produce bio-epoxy using powdered rosin with enhanced mechanical properties. Powdered rosin was used at 1, 3, 5 wt.% to study the effect of additive ratios

Based on a pseudopotential approach under a modified virtual crystal approximation that includes the alloy disorder effect, the elastic constants and some of their related mechanical properties of AlxIn1-xP ternary semiconducting alloys have been computed. Features such as elastic constants, bulk modulus, shear modulus and Young’s modulus are determined and their composition dependence is examined

Although a technologically interesting characteristic of boriding is the production of a hard, wear-resistant layer on the treated steel parts, thermal residual stresses may leads to the crack formation in both FeB layer and the vicinity of the FeB-Fe2B interface. In this study, thermal residual stress distribution in the borided tool steel without temperature gradients has been investigated systematically

The role of SnO on γ-ray radiation protection characteristics of binary silicate glass samples with the form (100-x)SiO2-xSnO; 40≤ x ≤ 60 mol% was investigated. The density and molar volume of the glasses were determined. The µ/ρ (mass attenuation coefficients in cm2/g) for the investigated glasses were evaluated via XCOM software and MCNP-5 simulation in the energy range of 0.015 – 15 MeV. The obtained

Green composites are a special class of composites in which at least one of the components is obtained from natural resources. They are an alternative to traditional composites because of their useful properties such as biodegradability, low cost, easy processability, sound insulation and recycling. Green composites, which emerge as environmentally friendly polymeric composite materials, offer techno-economic

The cyclic rise and fall of water level in the reservoir will destroy the rock and soil mass of the slope, deterioration its material parameters, cause the uneven settlement of the building foundation, and then cause the structural damage of the upper building.In order to explore the change rule of geotechnical material parameters and the rule and mechanism of structural failure of bank slope buildings

Composite materials obtained with natural and sustainable fibers can be used successfully in many areas on their own. In recent years, high strength fibers such as hemp, sisal, linen, jute, wood sawdust, bamboo are more preferred in composite materials. In this study, the effect of hornbeam sawdust size on the mechanical properties of the polyethylene was investigated. For this purpose, different sizes

The electronic and transport properties of borophene/phosphorene heterojunction are systematically investigated by first-principles calculations. The geometrical structures and electronic band structures of monolayer borophene, monolayer phosphorene and heterojunctions with different distances between layers are analyzed. The calculated results show that the band gap can be adjusted by tuning the distance

Zn-type compound Zn2SnO4 is critical in the field of thin-film solar cells and photocatalysis. In this study, a new composite nanomaterial Zn2SnO4/SnO2 was synthesized by high temperature synthesis spray process. The electrochemical properties of the samples were tested. Besides, different ratios of Zn2SnO4/SnO2 nano-heterostructures were synthesized by using the ion exchange method, with Zn2SnO4 nanocrystals

In recent years, polymer/graphene nanocomposites have attracted much attention because of the wide applications in many fields, such as chemistry, physics, materials and electronics. In this review, the preparation methods of the polymer/graphene nanocomposites, including solution blending, melt blending and in-situ polymerization, were presented in order to study the relationship between these methods

The present study reports on iron silicides produced on 31CrMoV9 steel by pack cementation method. Pack siliconizing was carried out using metallic silicon, ammonium chloride and alumina at 1000-1100-1200°C and with varying deposition time of 3-5-7 hours in an open atmospheric furnace. The morphology and structure of silicide layers were analyzed by optical microscope, SEM- EDS. It was observed that

Fly ash is a byproduct , obtained mainly from the Thermal Power Plant (TPP), constituting of SiO2 and Al2O3.Other oxides present in Fly ash (FA) include Fe2O3, CaO, MgO etc.It may also contain some trace elements like As, Zn, Pb , Se ,Ga , Ge and some lesser amount of rare earth elements. The particle size of Fly ash normally ranges from 0.01 to 200 μm. Such variability in particle size distribution

Considering the enduring mechanical behavior of lattice structure and compact part of the bone, an analogy between the samples made of easily find beech wood and the metacarpal bones of the lambs are compared to differentiate the mechanical behaviors moreover to facilitate the beech patterns in various appropriate places via experiments. During the experimental process, five different diameters of

The aim of the present study is to investigate the effects of recycled coarse and fine aggregates on the resistance to sulfate attack of recycled concrete under wetting-drying cycles. Six groups of different ratios of test with coarse and fine aggregates were designed to determine the dynamic elastic modulus and mass loss of recycled aggregate concrete. The reliability analysis was carried out by Wiener

The use of natural fibers as a substitute for synthetic fibers as reinforcement in polymer based composites is finding prominence nowadays. The present article deals with the comparative study of the biodegradable flexible composites fabricated using jute fabric (J) and rubber (R) with different configurations namely Jute/Rubber/Jute (JRJ), Jute/Rubber/Rubber/Jute (JRRJ) and Jute/Rubber/Jute/Rubber/Jute

Condensate dropout near the wellbore region in gas condensate reservoirs is the main reason for low well deliverability. Here, the gas and condensate phase behavior in this region were investigated to find the conditions for better deliverability. Firstly micro-CT experiments were carried out on a condensate gas system in 4 sandstone rock core samples. However, due to limitations of the experimental

A composite material can be defined as a combination of two or more materials that provide better properties than the material used alone. Composite materials can be preferred because of their many advantages, for example they are stronger and lighter compared to conventional materials. Usage of fiber-reinforced composite structures has increased in industries such as automotive, marine transportation

In this study, it was aimed to create a flexible composite material that can be used in special environments where heat and sound insulation is desired. Pumice with a grain size of 4.76-2.38 mm was mixed with 10% -20% -30% 40% and 50% PU by volume. Sound absorption coefficient, sound transmission loss coefficient and thermal conductivity coefficient tests were conducted. Sound absorption coefficient

An AlSi10Mg aluminium casting alloy is infiltrated into porous silicon carbide structures, and the microstructural, mechanical and physical properties of aluminium composites are investigated. Silicon carbide porous structures were formed by the polymeric template sponge replica method. Reticulated and open pore polyurethane sponges with 45, 60 and 80 pores per inch were used for the polymeric replica

In this paper, a composite photocatalyst is prepared by using waste clay bricks to adsorb nano-TiO2, and the decorative concrete surface layer is made by using it. Then, it is found that the reclaimed clay sand (RCA) prepared by building waste clay bricks has poor workability, with the relative strength between 40% and 80%, but can meet the strength requirements of ordinary building mortar. Compared

The critical gas flow is widely used to judge the loading status of vertical gas wells. Though it could demonstrate the carrying ability of gas flow, it can not quantify how much liquid it can remove and it does not take into account of the fact that the liquid-carrying ability of gas flow is limited in theory. In fact, the gas wells still load even if the gas producing rate is larger than the critical