bluuebunny/crossref_metadata_2025_split huggingface dataset:
Vibration Analysis of Hybrid Composite Laminated Beam with Crack in ANSYS APDL
Authors: Danu Sunita , Saini Nitish Kumar , Nautiyal Deepak Prasad , Misra Anadi 
Published: May 2021

Abstract
In this paper, whole work is done for hybrid laminated composite beam which is made of three composite materials boron-epoxy, aramid-epoxy, and s-glass-epoxy. A numerical study, using finite element method is carried out to analyse the free transverse vibration behaviour of composite beam. ANSYS APDL is used as a finite element solver to simulate the free transverse vibrations. A variety of parametric studies is performed to check the effects of various parameters associated with crack geometry and laminate property on the three least natural frequencies. Parameters for the investigation are included as fibre volume fraction, ply angle for (0°/Φ°/0°/Φ°/0°/90°/(90-Φ)°/0°/(90-Φ)°/0°) stacking sequence, location of crack geometry relative to the restricted end, depth of crack (a) and support conditions (C-C & C-F configuration) for hybrid laminated composite beam, trend of the least three transverse natural frequencies is also discussed in detail. It is noted that maximum value of natural frequency occur at Φ equals to 90° for both (CC) and (C-F) and for relative crack depth 0.5 to 0.6, there is sharp decrement in natural frequency for (C-F). Other factors of laminate and crack geometry are also discussed in present analysis, which shows a great scope of this hybrid composite with (0°/Φ°/0°/Φ°/0°/90°/(90-Φ)°/0°/(90-Φ)°/0°) stacking sequence in the field of aviation and prosthetics.
Effect of flow velocity and pressure on carotid artery due to deposition of different shapes of plaque
Authors: Yadav Raman , Vashisth Sharda , Varma Ranjit , Kumar Kaushal 
Published: May 2021

Abstract
Atherosclerosis is the disease progressed because of the deposition of stenosisat the interior walls of arteries which results in reducing the size and causing blockage in the carotid artery leading to brain attack or stroke. Twodimensional model of carotid artery is designed and analyzed by Computational Fluid Dynamics (CFD). Designing of general analytical model of artery followed by meshing of geometry, application of boundary conditions and analysis is done with ANSYS Fluent 16.2. The objective of this research is to analyze the consequence of flow velocity and pressure on the arteries having blockage to assess the diseases related to carotid artery. This paper provides analytical analysis of flow velocity and pressure on the artery due to deposition of different shapes of plaque. We consider plaque shape1, plaque shape2, cosine plaque and irregular plaque shapes. Hemodynamic variables like velocity and pressure differ with commute mostly in the shape of geometry. It’s found that velocity is maximal at the constraint as compared to pre- and post-stenotic areas which shows that the artery having more stenosis area has maximum pressure and velocity on the wall of the artery.
Significant complications declining usage of Electrical Discharge Machining process
Authors: Matharou Gurpreet Singh , Bhuyan Basanta Kumar 
Published: May 2021

Abstract
In the present paper, an effort has been laid down to develop a framework for the micro EDM (μ EDM) in today’s industrial environment. The μ EDM has shown considerable involvement in ceramic industries where workpiece needs to be machined in micro sizes. μ-EDM owing to stronger surface quality and higher precision is a futuristic machining process for building up micro tools and alternative micro components. However, there are several complications that demand to be discussed before μ-EDM can be dealt with as a decisive technique and it can carry out its performance. This investigation includes of the EDM system scheduling and electrode wear issues. Particular consideration has been offered to aspects and methods critically varying the efficiency involving positioning approaches during grinding of electrode and new μ-EDM operations.
A Comprehensive review on hydroelectric cell: A green energy source for sustainable development
Authors: Singh R. K. , Manash A. , Kumar S.S. , Satyapal H. K. , Kumar G. , Shankar U. 
Published: May 2021

Abstract
A thorough analysis of the hydroelectric cell, in which electric charges are produced by redox reaction, was attempted. As electrodes, zinc & silver are used, with zinc serving as an anode & silver acting as a cathode. Hydroelectric Cell is a capable, environmentally friendly energy generation system that provides several benefits to humans. HEC is a straightforward, low-cost, & novel technique. The recently developed HEC is proving to be superior alternative to environmentally friendly electrical energy products. For the HEC fabrication, various ferrite nanomaterials such as magnesium, nickel, and others were used. The significance of the recent study is that it focuses on green energy generation, which is an alternative source in today’s energy demand. In addition, hydroelectric cell output is predictable and consistent, and it has the capability to substitute conventional methods of generating renewable energy in terms of cost & security.
Investigating structural, magnetic and multiferroic properties of gadolinium substituted strontium hexaferrite (SrFe12-xGdxO19)
Authors: Kumar Singh S , Singh Rakesh K , Manash Aniket , Kumar Gaurav , Shankar Uday , Satyapal Harendra K 
Published: May 2021

Abstract
An economical and citrate precursor based sol-gel technique is employed for pure phase synthesis of Gd3+ substituted M-type strontium hexaferrite (SrFe12-xGdxO19) for x = (0.25 - 1.00). The XRD patterns reflected all prominent planes related to hexagonal symmetry (P63/mmc space group). The crystallite size and induced strains is determined using Williamson-Hall plot. Lattice constants (a) and (c) shows minor increments with Gd3+ concentration. Particle distributions in SEM micrograph agree with W-H plot analysis. FTIR analysis is in consistent with X-ray intensity results. The ‘Law of Approach’ to saturation is applied to estimate parameters such as, magnetization (Ms) of order 40.91 to 57.7 emu/g and retentivity (Mr) ranging from 26.3 to 32.5 emu/g. A remarkable increase in coercivity (HC) is observed with increasing Gd3+ composition, with a value of 2500 to 6310 Gauss. Moreover, incorporation of Gd3+ in SrFe12-xGdxO19 lattice hinders electrical leakage profitably to yield remanent (Pr) and coercive polarization (Pc) of order 0.19 μC/cm2 and 17 kV/cm respectively. Thus sol-gel method proves to be useful in synthesizing nanomaterials of enhanced physical properties along with it being cost effective. Therefore, we are reporting tuning of magnetic and multiferroic properties of SrFe12O19 due to crystal strain mediated by Gd3+ doping at Fe3+ site.
Development and Performance analysis of Hybrid Based Polymer Composite
Authors: Jha Kamlesh Kumar , singh Harsh , Shukla Manoj Kumar 
Published: May 2021

Abstract
Fiber Supported Polymer Network composites are generally utilized as primary materials. These materials trade ordinary materials for severe reasons. What’s more, these materials are liked for their lightweight and strength. They additionally find widespread application in fuel pipelines and slurry conveying medium in the mechanical application. This exploration tends to the assembling of glass fiber and standard fiber mix composites. Impact of stacking arrangement on malleable, flexural, and sway estimations of untreated woven jute and Glass texture supported polyester half breed composites have been examined tentatively. Overlays were created by hand layup method and followed by restoring at room temperature for 48 h. Separate Jute and Glass fiber overlays were manufactured for correlation reasons. Likewise, these materials are tried for tribological properties like disintegration. Shifting the surface speed, a grouping of slurry and openness time disintegration done. Corrosion-tested examples were oppressed for SEM assessment. SEM micrographs on the FRP showed the misshapen that happened was fundamental because of cutting wear, and the method of disappointment was because of a fragile break. A general examination of the multitude of overlays’ properties uncovered that the incorporation of glass in jute covers bring about an equilibrium in ecological effect and cost.
Computational Fluid Dynamic Study of Blockage in Artery With and Without Bypass
Authors: Ansari Affan Ahmed , Shameem Faisal 
Published: May 2021

Abstract
In complex vessel geometry different temporal, spatial variation takes place which occur under pulsatile conditions. The high Wall Shear Stress (WSS) at the wall affected by the disturbed flow may ultimately lead to endothelial cell dysfunction, which leads to atherogenesis and thrombosis. The present study observes WSS and streamlines due to stenosis with and without By-pass Artery. It was found that by adding bypass Artery there is tremendous decrease in wall shear stress in the stenosis. Reverse flow of blood through stenosis was observed in 30° Bypass Models. Hence the blood flow stabilizes and can be reached at optimum level in 50% stenosed artery. Based on this paper findings, it can be deduced that there would be a low risk of further atherosclerosis when the bypass artery is added.
Design and Development of All-Terrain Vehicle Roll Cage
Authors: Dubey K K , Pathak B , Singh B K , Rathore P , Yadav S R S 
Published: May 2021

Abstract
ATV is an off-roading vehicle and one of its essential parts is its roll cage on which all parts are mounted. The roll cage not only protects the passenger inside the vehicle it also acts as a structural defense for the vehicle. Now because of the above-mentioned properties, the roll cage is required to be structurally robust and it should tolerate high Von mises stresses and should have the least possible deformation during a crash while protecting the motorist inside the vehicle. Hence due to these high concerns of the roll cage, it is necessary to undergo simulation of the design to detect points that are vulnerable to stresses and high deformation. High Impact forces are applied on the roll cage in analysis to achieve real world actions of the chassis, which in fact helped us in developing a design that have mandatory safety standards and adequate potency to withstand these loading.
Optimization of turning process parameters of SS-321 using taguchi based grey relational analysis
Authors: Kumar Gaurav , Wahid Mohd Atif , Tomer Ankit , Kumar Mukesh , Singh Om Prakash 
Published: May 2021

Abstract
Tool wear, high surface roughness & MRR (Material Removal Rate) are the major problems associated with turning of SS-321. The turning parameters such as feed rate, depth of cut and cutting speed have the major effects on surface roughness, MRR, and cutting forces. An increase in magnitude of cutting forces leads to increase in the power requirements and simultaneously it decreases efficiency, which is the great concern in current scenario. In this turning work on SS-321, Taguchi based L27 orthogonal array was designed and experiments were performed accordingly. The data analysis was done by Taguchi, ANOVA and Grey relational analysis. The optimized results and improvements by using this method were also validated by a verification test. Results revealed that turning process with parameters such that feed rate, depth of cut and cutting speed at 0.3 mm/rev, 0.3 mm and 120 m/min respectively yields the optimum multi-performance characteristics. However, it was determined by ANOVA (Analysis of Variances) that depth of cut is a process parameter that affect most the multi-function features with percentage contribution of 64.86% followed by feed (16.84%) and speed (10.20%). Under these circumstances, the optimum parameters set seems to favorably affect the average values of all the three response parameters (surface roughness, cutting forces, MRR) so that the average values of output characteristics arrive at optimum level.
Assessment of appropriate areas for the establishment of Solar Thermal Power Plant in Rajasthan
Authors: Agarwal Sajal , Gautam Harshit Kumar , Tarique Altaf Hasan 
Published: May 2021

Abstract
In past years, cost of photovoltaic has decreased and investments of solar power plant have increased. In spite of this, practical studies remain paramount as cost of installation is comparatively high. One of pivotal parameters in studies is the proper location selection. So, in this paper we mix Analytical hierarchy process (AHP) and multi-criteria decision making method (MCDM) to get the results of the ideal position of sunlight based energy station in Jodhpur, Rajasthan. Using MCDM the models or factors referenced will be weighted to assess possible destinations to find a sunlight based plant. Examination and count of the loads of these variables will be directed utilizing AHP. For this study Sardarpura, Kabir Nagar and Mandore are selected as examples. These places are located in same plane. The decision of such measures is set apart by the impact introduced to the general objective; for this situation in climatic models and geomorphological. In study, it is found that Kabir Nagar is ideal position for establishment of solar power plant. This result is based on criteria, feeder capacities, solar energy potential and earth slopes. The result are ratified by considering the total amount of area and sunshine duration.
Application of taguchi method coupled with GRA for optimization of drilling process parameters
Authors: Sharma Khushboo , Kumar Gaurav , Kumar Mukesh 
Published: May 2021

Abstract
In present article, an experimental study is performed for optimizing the machining parameters of AA6082. The control factors like cutting fluid (present - absent), speed (520 rpm – 420 rpm), feed rate (120 mm/min – 80 mm/min) and hole-depth (16 mm – 24 mm) are taken into account to optimize the material removal rate and surface roughness. Taguchi’s L18 orthogonal array was chosen for experimental trials. Grey relational analysis is employed to find, which process parameters affect the surface finish most with their percentage contribution individually. The results of ANOVA show that among all the control factors, feed rate (74.82%) is the highest contributing factor followed by cutting fluid (11.42%). This study also shows that by using the taguchi approach, the surface finish of the machining process can be upgraded.
Application of Generalized Models for Identification of Viscoelastic Behaviour on Hysteretic Double Peak Materials
Authors: Carputo F , Arricale V M , Brancati R , Maiorano A , Mosconi L 
Published: May 2021

Abstract
This paper investigates the capability of the fraction derivative Maxwell model to reproduce the mechanical behaviour of advanced viscoelastic materials, that are designed to be able to dissipate energy in an extended range of frequency than traditional viscoelastic materials and present a more complex shape of strain-stress frequency response. Fraction derivative models, compared to traditionally used generalized Maxwell model, can reproduce the material behaviour with a smaller number of parameters, reducing the utilization complexity and the computational burden.
Laccase nanoparticle: Synthesis, characterization, entrapment in alginate beads and application in the biodegradation of Bisphenol A
Authors: Ademakinwa Adedeji N , Ojo Abidemi , Erasmus Mariana , Agunbiade Mayowa O. 
Published: May 2021

Abstract
Laccase nanoparticles (LNP) were synthesized by desolvation of the enzyme with ethanol and cross-linking with glutaraldehyde. LNP was characterized via scanning electron microscopy (SEM) and then entrapped in alginate beads for the biodegradation of bisphenol A (BPA). The stability of the immobilized LNP (iLNP) to heat inactivation was also investigated. The iLNP retained about 53±4.7% of its initial activity after 7 cycles of catalysis. The iLNP was stable to thermal inactivation at 40-70°C as obtained from its kinetic and thermodynamic parameters. The iLNP removed 80 mg/L BPA from solutions with a biodegradation efficiency (BE) of 92% after 1 h. Repeated use of the iLNP in BPA removal resulted in a BE of 75% after 7 cycles of catalysis. iLNP serves as a novel biocatalyst in the bioremediation of pollutants such as BPA, and its thermostable characteristics make it useful for other biotechnological applications
Biomimetic approaches to color formation in ecological architecture
Authors: Krivenko O , Pylypchuk O , Avdieieva N , Avdieieva M , Bieber S 
Published: May 2021

Abstract
The article discusses the characteristics and features of the color formation in nature for solving problems of ecological architecture. The analysis of the main directions of research on the significance and possibilities of color solutions in creating an ecologically sustainable urban environment is presented. It is proposed to use analogs of nature to obtain natural features and qualities of ecological design of buildings, including in the formation of the color structural component of the design. As a result of the analysis of the studies, the mechanisms of color formation in nature, based on functional expediency, adaptation to the conditions of life in the environment, have been identified. The mechanism of formation of pigment, structural and combined colors in nature is considered. On the basis of the presented analysis of the functionality of color formation in nature, coloristic means of regulating the energy-efficient and environmental parameters of the building, namely thermoregulation, regulation of illumination, humidity, are identified. The examples of color solutions of building finishing aimed at adaptation to external environmental conditions are analyzed. The methods and possibilities of forming the color structure on the basis of the studied natural analogues for solving the problems of modern ecological architecture are systematized.
Study on the water vapor adsorption Characteristics of Carbon materials in HTGR
Authors: KaiYue Shen , Da Yan , HuaQiang Yin , XueDong He , Tao Ma , hua Fan 
Published: May 2021

Abstract
High-temperature gas-cooled reactor (HTGR) is the first kind of power plant with fourth-generation features in the world, and a large amount of graphite and carbon material is adopted as structural material and fuel matrix material, including boron-containing carbon (BC) and isostatic pressure graphite (IG-110). As a kind of porous material, the carbon material contains a certain amount of moisture, which will impose negative effects on reactor safety. Therefore, this paper studies the water vapor adsorption characteristics of carbon materials in HTGR. The adsorption isotherms of BC and IG-110 were obtained by experimental measurements. Experiments show that the moisture adsorption of IG-110 is much lower than that of BC at various relative humidity. The experimental data is analysed by the BET, GAB, DA, Oswin adsorption models.
Influence of the activating solution on the mechanical properties of compacted volcanic ash based geopolymers
Authors: Churata Rossibel , Almirón Jonathan , Roudet Francine , Bautista Asunción , Torres-Carrasco Manuel , Tupayachy-Quispe Danny 
Published: May 2021

Abstract
This work studies the mechanical properties of volcanic ash based geopolymer mortars. The geopolymer mortars were made with volcanic ashes from Ubinas volcano using mixtures of Na2SiO3 and 12 M NaOH as alkaline activator. Solutions with different concentrations of silicate (0-25 % by wt.) were used. The geopolymer mortars were compacted at 15 MPa and cured at 80°C for three different periods of time. The results show the influence of the concentration of Na2SiO3 in the compression strength and wear resistance, raising highest compression strengths for 20-25% of Na2SiO3 while the wear resistance was higher at concentrations over 20% of Na2SiO3. In this optimal ratio, for 20% Na2SiO3, a compression strength up to 52.3 MPa was recorded at 7 days. Considering the overall performance analysis, the synthesis of geopolymers with volcanic ash promises a solution for sustainable mortar production and natural waste disposal.
Catalytic pyrolysis of plastic materials using natural zeolite catalysts synthesized from volcanic ash
Authors: Vargas María , Tupayachy-Quispe Danny , Roudet Francine , Duquesne Sophie , Almirón Jonathan 
Published: May 2021

Abstract
Plastic waste and its inadequate final disposal are a serious problem of environmental pollution, which has increased considerably in this time of pandemic due to the use of masks, gloves, food packaging or others, which will eventually reach the oceans, increasing the problem of the islands that are made up of plastic waste. Since the final disposal techniques of plastic waste are insufficient, in this research the catalytic pyrolysis has been evaluated using zeolites synthesized from volcanic ash of the Ubinas volcano (Peru), as catalysts. For this, two catalysts were synthesized, Z1 and Z2 zeolite, made at 150 and 180 °C in a 5 M NaOH solution, respectively. The pyrolysis was carried out at a catalyst/polymer ratio of 10 and 20 % and it was compared with a synthetic zeolite (ZSM-5) and without catalyst at a reaction temperature of 450 °C. The essays were carried out with PP virgin and plastic waste. It was determined that catalytic pyrolysis using natural zeolites synthesized from volcanic ash are appropriate for the treatment of plastic materials and that they tend to generate a higher proportion of pyrolytic gases and do not generate carbonaceous residues.
Numerical Analysis of Initially Imperfect Pretensioned Bolted Connections
Authors: Abdallah Mostafa Nour Eldin M. , Salem Emad , Ibrahim Sherif M. , Dessouki Abdelrahim K. 
Published: May 2021

Abstract
Bolted steel end-plate rigid connections are used to transfer straining actions between different parts of steel structures. However, during structural assembly some of these connections are erected with initial imperfections in form of gap between connected parts. This paper investigates numerically initially imperfect end plate connections subjected to major external bending moment and major shearing force. A finite element model (FEM) is developed to represent the behavior of these initially imperfect connections. The presented FEM is verified against experimental testing presented by the authors in previous work. The effect of the gap angle between connected parts on the connection bending strength and moment-curvature relationship is investigated by varying its value from 1.5° to 6°. The results of initially imperfect connections are compared to those of perfect ones and it is concluded that the loss in bending strength of imperfect connections varies from 11.5 % to 22 % for gap angles from 1.5° to 6° respectively.
Study of the physical-mechanical properties of igneous stones from Tlalpujahua Michoacan, Mexico
Authors: Alonso-Guzman Elia Mercedes , Navarrete-Seras Marco Antonio , Martinez-Molina Wilfrido , Chavez-Garcia Hugo Luis , Lara-Gomez Cindy , Garcia-Perdomo José Carmen 
Published: May 2021

Abstract
Research work was carried out on rocks obtained in the municipality of Tlalpujahua Michoacán, located in different quarries of stone material, classifying the name of the quarry with the name of the community where the stones are located: “El moral” stones of bronze (BR) and golden (D) color, “la américa” stones of gray (G) and pink (R) color, “llano grande” stones of dark brown (CO), reddish-brown (CR) and black (N) color. Physical and mechanical tests were carried out, evaluating the percentage of moisture absorption, density, and absolute density. To evaluate the mechanical properties, the following tests were performed: uniaxial compressive strength (UCS), and static flexural test (modulus of rupture). The comparison of the different physical-mechanical tests allows estimating their behavior as a structural and restoration element. The correlation obtained to estimate the UCS has an acceptable correlation coefficient.