Crimson Publishers-Mechanical Engineering

 Seismic Resistance of Turbine Equipment of Powerful Nuclear Power Plants by Serhii Palkov* and Ihor Palkov in Crimson Publishers Abstract: The paper considers the methods of the design analysis of the seismic resistance for the components of operating nuclear power plants in at three-dimensional setting using the finite element method. An algorithm to confirm the seismic resistance of equipment by a calculation method is proposed, and the limits of its application are determined. A mathematical model of the equipment is developed, and an example of the determination of natural frequencies and stresses for a three-dimensional structure is given. Two main types of calculation were used–static and dynamic. The seismic resistance of the equipment was estimated on the example of the K-1000-60/1500 steam turbine condenser and calculated at a seismic intensity of 6 points on the MSK-64 seismic intensity scale. In the course of solving this problem, results of the stress distribution...

 Editorial on Additive Manufacturing by Ananthapadmanaban Dattaguru* in Crimson Publishers Editorial: Additive Manufacturing is a buzz word in technology for the last few years. Most of the manufacturing was being done by both addition and removal of material like casting, welding, and machining. In recent times, mankind has realized that each bit of material saved is very crucial for the health of mother earth. Hence the thrust on additive manufacturing. Though the term additive manufacturing is new, some of the technologies like solid state welding are being used commercially for a few decades. The crucial difference is that CAD models are being generated after laborious research and the final product alone is manufactured layer by layer using additive manufacturing techniques. https://crimsonpublishers.com/eme/pdf/EME.000588.pdf For More open access journals in  Crimson Publishers please click on link:  https://crimsonpublishers.com

 A Review on Leader-Follower Based Path Optimization in Vehicle Platooning by Jeya Mala D* and Pradeep Reynold A in Crimson Publishers Introduction: In self-driving cars, especially when the vehicles are travelling as a cluster in which the first vehicle acts as a leader and the other vehicles act as followers, there is a need for proper communication on the selection of path. This will help the vehicles to reach their destination without any intermittent communication hurdles that leads to accidents and traffic congestions. To achieve this, the vehicles on the road are formed as a platoon in which the first vehicle will send the communication to all the follower vehicles to line up behind the leader. This will help them to automatically form a string formation to stay close to each other on the highway without any traffic difficulties. This survey report gives an overview on how nature inspired techniques could be applied to achieve vehicle platoons to smoothly run on the hig...

Hydrogen Economy: Alternative Approaches by Vicente Fachina* in Evolutions in Mechanical   Engineering_ Hydrogen Economy Besides traditional approaches for producing and storing hydrogen from cheap, surplus electricity or heat to use in energy conversion processes, this paper aims at simulating the feasibility of using water as energy carrier by two alternative approaches: Hydrogen Combustion from water splitting, and LENR-Low Energy Nuclear Reactions . The former can yield 106J/kg-water magnitude energy intensity; the latter can yield 109 J/kg-water magnitude energy intensity. https://crimsonpublishers.com/eme/fulltext/EME.000525.php Evolutions in Mechanical Engineering _ Crimson Publishers For more open access journals in Crimson Publishers Please click on link: https://crimsonpublishers.com/ For more Articles on  Hydrogen Economy   Please click on: https://crimsonpublishers.com/eme/ Follow On Publons  : https://publons.com/publish...

Evolution of Fatigue Behavior Characterization of Polymer-Matrix Fiber-Reinforced Composite Laminates by Rajamohan Ganesan in Evolutions in Mechanical Engineering_  Composite Laminates There are currently three approaches to characterize and quantify the fatigue behaviour of composite laminates that are, Fatigue Life Modelling and Prediction, Phenomenological and Empirical Modelling, and Progressive Damage Modelling . These approaches constitute the evolution that is driven by ever expanding industrial needs and academic pursuit and assisted by perpetual technological advances in experimentation capabilities. In the first approach of Fatigue Life Modelling and Prediction the individual material degradation mechanisms are not directly concerned with, rather the determination of stress-life relationships based on experimental data is concerned with and the failure criteria or the residual strength determination is established based on these relationships, for the specific com...

Examination of Tensile Test Specimens Produced in Three-Dimensional Printer by Fuat Kartal* in Crimson Publishers: Applied mechanical engineering In this study, the effect of different parameters on tensile test specimens produced by joint manufacturing with open source code and equipment using PLA type filament was investigated experimentally. Tensile specimens were designed and manufactured according to ASTM IV type tensile test standards. The test design was based on the L9 orthogonal array of the Taguchi Method and experiments was designed according to this plan. According to the results, Parameters of layer thickness and filling scan range parameters were found to provide significant improvement in the tensile strength increase https://crimsonpublishers.com/eme/fulltext/EME.000521.php For More open access journals in Crimson Publishers please click on link: https://crimsonpublishers.com For More Articles on Applied mechanical engineering Please click o...

Evaluation of Air Flow Characteristics of Aerostatic Thrust Porous Bearings: A Numerical Approach by Marcelo Gustavo Coelho Resende, Leandro José da Silva, Cláudio de Castro Pellegrini and Túlio Hallak Panzera* in Crimson Publishers: Structural engineering Aerostatic porous bearings have been investigated in the last decades for precision engineering designs , since these bearings offer zero-friction and high operating speeds, as well as providing a very precise positioning system without external influence. Numerical methods such as CFD (Computational Fluid Dynamics) play an important role in the design and behavior analysis of porous aerostatic bearings, being possible to adjust the geometry and characteristics of the porous restrictor even before its manufacture In the present work, the behavior of the gas at the inlet and outlet of a porous thrust bearing made of cementitious composites is analysed by numerical simulation using CFD method. The results reveal a stable b...

Acoustics between “Engineering,” “Architecture,” and “Interior Design” by Naglaa Sami Abdelaziz*  In Evolutions in Mechanical Engineering: Crimson Publishers_ Journal of applied mechanical engineering Acoustic is the science of sound communication. Dealing with it could be through the usage of the devices to enable its transmission between the source and the receiver in question. Therefore, it is an engineering field. In another hand, acoustic is the science and art of the well-selected materials to enhance its propagations within the spaces. These materiality schemes, quantities, qualities, and locations, effect on the quality of the sound behavior within any interior, and then it is interior design tool to reach a well-designed built environment. Acoustic will never occur without being in a building; we need architecture to apply the acoustic. Hence, the acoustics field varies between the engineering, architecture, and the interior design . The following discussion will ...

Numerical Modeling of Nano Bundle and Nano Rope-Reinforced Polymer Mechanical Properties by Seyed Hossein Mamanpush*, Zohre Matin Ghahfarokhi and Hossein Golestanian in Crimson Publishers: Journal of Mechanical Engineering Carbon nanotubes (CNTs) demonstrate unusually high stiffness, strength and resilience, and are ideal reinforcing materials for polymer-based nanocomposites. Van der Waals interactions between the nanotubes often result in formation of nanotube bundles and/or ropes. Determination of mechanical properties of the nano bundle and nano rope-based nanocomposites is difficult due to the complicated geometries of the reinforcement structures. However, to better utilize nanocomposites, it is crucial to determine mechanical properties of nanocomposites in their real form as much as possible. In this paper, the elasticity theory for anisotropic body and continuum modeling are used to determine effective mechanical properties of bundle and nanorope-based nanocomposite...

Effects of Carbon Nanotube Dispersion on the Material Properties of Polymer Matrix Composites by Azadeh Tavousi Tabatabaei, Seyed Hossein Mamanpush* and Bahareh Tavousi Tabatabaei in Crimson Publishers:  International Journal of Mechanical Engineering Carbon nanotubes (CNTs) constitute a prominent example of structural nanomaterials , with many potential applications due to their unique mechanical properties. Substantial improvements in mechanical properties of polymers have been attained through the addition of small amounts of carbon nanotubes. The way in which CNTs are distributed inside the matrix can be divided into two main categories namely: aligned and randomly distributed. Modeling of carbon nanotube dispersion in the polymer matrix is an important step for understanding the characteristics of composites. For modeling CNTs dispersion in the polymer, a numerical homogenization technique based on the finite element method (FEM) is used. https://crimsonpublishe...

Compression Behavior of Pa-12 Pipes Under Large Displacements by De Almeida LS, de Oliveira TA, Maurício MHP and d’Almeida JRM* in Crimson Publishers: Materials science Polyamide (PA) pipes are being increasingly employed in fluid distribution networks . Most of these pipes is used in underground networks, where overloads can cause large deflections. Excessive displacement can lead to product failure and can cause surface cracks and leakage of the fluid being transported. This condition can be maximized if the pipe is aged due to effects of the environment or of the fluid itself. In this work, the effect of aging PA pipe segments by their exposure to hot water is presented and discussed. The deformation characteristics of the material before and after aging are evaluated. The results indicate plasticization of the pipes due to exposure to hot water, and, thus, the loads required to cause a specific degree of compression, characterized by reduction of the pipe’s diameter, a...

Usage of Process Models for Quality Management System: A Case Study of Energy Company by Kashif Mahmood*, Taivo Kangilaski and Eduard Shevtshenko in Evolutions in Mechanical Engineering Business Process Management is the most important part of nowadays management. It ties company employees to work together towards a common business goal as well as dismantle existing business connections if they do not work properly. Thus, it is important to understand the dynamics of processes in the context of employees and assessment of risk during the execution of processes. The current article describes the possible usage of process models in the sense of quality management based on performed case study. The aim of this paper is to describe how process modelling approach facilitates to manage elements of a Quality Management Systems (QMS) such as organizational structure and responsibilities, business processes, information management and control of documents. https://crimsonpublis...

Evolution of Engineering Acoustic Waves with Metamaterials by Craig SR and Chengzhi Shi* in Evolutions in Mechanical Engineering Acoustic waves are the physical manifestation of mechanical vibrations traveling through a medium. These wave propagations can be described with physical attributes, such as phase, wavelength, amplitude, and velocity. The velocity of an acoustic wave can be determined by two material properties of the propagation medium: the bulk modulus and the density. Specifically, the squared phase velocity of an acoustic wave equals the bulk modulus multiplied by the inverse of the density. For all natural medium, positive bulk modulus and density are observed. The recent development of acoustic metamaterials demonstrate media that exhibit either a negative bulk modulus, a negative density, or both negative bulk modulus and negative density. As the fundamental physics of these metamaterials become better understood, researchers are beginning to develop applica...

A Review on Electromechanical Methods and Devices for Neural Rehabilitation by Nazita Taghavi, Greg R Luecke and Nicholas D Jeffery* in Evolutions in Mechanical Engineering The nervous system of most quadrupeds consists of two main systems: The Central Nervous System including brain and spinal cord and the Peripheral Nervous System which is a large nervous system running through the body, controlling all voluntary and automatic body movements [1,2]. Disease like peripheral neuropathy [3], damage in spinal cord [4] and severe stroke to head can cause numbness, weakness, trouble with grasping items, problems with walking and balancing or severe debilitating disabilities. Some of these diseases and symptoms can be treated by medicines, physical therapies and surgery ; however, in many cases, patients face permanent disabilities specially with those diseases related to brain and spinal cord injuries since these organs include a complex system of nerves and regeneration of those...

Challenge in Structural Behaviours of Corroded Pre-stressed Concrete Beams by Lei Wang* in Evolutions in Mechanical Engineering Strand corrosion is one of the main causes for the deterioration of Pre-stressed concrete structures. Corrosion decreases strand cross-section, causes material deterioration, induces concrete cracking, degrades bond strength and deteriorates the capacity of PC beams. As the high-stress level of prestressing strand, strand corrosion causes a brittle failure of PC beams without warnings. The potential dangers of corrosion in PC beams would be much more severe than that in reinforced concrete members. The structural behaviors should be thoroughly investigated to insure the serviceability and safety of corroded PC beams. https://www.crimsonpublishers.com/eme/fulltext/EME.000507.php For More open access journals in Crimson Publishers please click on link: https://crimsonpublishers.com For More Articles on Evolutions in Mechanical Engineer...

Implementation of Non-Linear Energy Sink in Damping and Harvesting of Acoustic power   by Reza Moezzi in   Evolutions in Mechanical Engineering Non-linear Energy Sinks (NES) is a new approach in the field of vibration isolation which allows an irreversible transfer of vibration energy from a primary linear system (e.g. a mass -spring where a harmonic excitation is applied) to a secondary non-linear system (e.g. a mass -spring with variable compliance and a damper) where the energy is finally transferred and dissipated. The phenomenon taking place in NES is referred to as Non-linear Energy Transfer (NET). Main applications of NET in the field of engineering range from aero-elastic instabilities control to seismic mitigation in civ il engineering to drill-string systems stabilization. Recent applications in the field of acoustics have seen the use of a thin visco-elastic membrane as NES, where a high amount of the acoustic power provided by waves propagating in a duct is...

Analysis and Optimization of Lower Control Arm by Kale AR in  Evolutions in Mechanical Engineering Control arm in automotive vehicle acts as a linkage between sprung and unsprung mass of vehicle. Lower control arm is subjected to various loads. Due to this type of loading, there are chances of bending of control arm. Hence failure of lower control arm occurs. Weight reduction of vehicle component is one of the main concerns. The aim of the paper is to analyze and optimize the lower arm using finite element analysis. The model of lower control arm is done in CAD software. Static analysis of lower control arm is carried out in analysis software. Topology optimization of lower arm is performed for weight reduction. After topology optimization static analysis of optimized lower control arm is carried out. Results obtained from analysis where studied to check whether the design is within the yield strength. Cost analysis of existing and optimized lower control arm has bee...

Analysis of Hybrid Power Train System Based on Degree of Freedom by Kun Zhao in  Evolutions in Mechanical Engineering The hybrid power train is one of the most important technologies that have been developed to satisfy the challenging fuel economy and emission standards. A suitable configuration of hybrid power train should not only meet the requirements of vehicle kinematics and dynamics, but also meet the requirement of fuel economy and emission. For this purpose, a hybrid power train system should contain multiple power sources so that the speed and torque of the power sources can be properly distributed to achieve high system efficiency. To achieve optimal distribution of speed and torque, the system should have more speed DOF and torque DOF. Therefore, the hybrid power train system can be analyzed based on the viewpoint of degrees of freedom. https://crimsonpublishers.com/eme/fulltext/EME.000504.php For more open access journals in Crimson Publishers please ...

Free-Piston Engine (FPE) Technology with Different Applications by Boru Jia in  Evolutions in Mechanical Engineering The free-piston engine (FPE) is a linear engine in which the requirement for a crankshaft system is eliminated and the piston assembly has a free and linear motion[1]. First proposed around 1930, FPEs were in use in the period 1930-1960 as air compressors and gas generators and provided some advantages over presenttime conventional combustion engines and gas turbine systems[2]. They are known to have a greater thermal efficiency (40-50%) than an equivalent and more conventional reciprocating engine (30-40%)[3]. A driving force behind the interest in free-piston engine generators is the automotive industry’s increasing interest in hybrid-electric vehicle technology. Much work has been undertaken by number of research groups worldwide, including the authors’ group, to explore the operation characteristics of FPEs[4,5]. https://crimsonpublishers.com/eme...

Innovative Method in Recycling Wind Turbine Blades: Mini Review  by Seyed Hossein Mamanpush in  Evolutions in Mechanical Engineering During the past decades many researchers focused on finding a solution for the wind turbine blades that faced end of life but the main challenge for all the previous research was lack of acceptable pathway that was viable economically. Because these blades currently considered as a waste, spending lots of energy and chemical material for them is not an acceptable solution, that is why we suggest an innovative method for solving this problem by considering mechanically recycled wind turbine blades (rWTBs) as a feedstock for making second generation composites. https://crimsonpublishers.com/eme/fulltext/EME.000502.php For more open access journals in Crimson Publishers please click on link: https://crimsonpublishers.com For More Articles on Evolutions in Mechanical Engineering Please click on : https://crimsonpublishers...