Abbreviation: J. Mech. Eng. Res.
Start Year: 2009
Page 1 of 6, showing 20 records out of 109 total, starting on record 1, ending on 20
https://doi.org/10.5897/JMER2017.0487[Article Number: 8F2C3A055679]
The unhealthy and destructive motion exhibited in moving, operating or rotating machinery is called vibration. It is also observed as any oscillatory motion of a mechanical system about its equilibrium point. Clearly, vibration can thus be unhealthy and destructive which is the reason for its undesirability. However, it can also be good and useful as observed in some mechanical and construction equipment. Vibration can... Read more.
https://doi.org/10.5897/JMER2017.0482[Article Number: 4212E2966176]
In this study, by applying Giannakopoulos and Pallot’s stress and displacement equations, and using the Goryacheva’s friction model, the stress and displacement equations are obtained. Finally, by applying analytical method, these equations are solved. By assuming that the roller is rigid and the substrate is almost homogeneous with constant Poisson ratio and constant elastic modulus, the results of... Read more.
https://doi.org/10.5897/JMER2017.0468[Article Number: CDBF74165273]
The study illustrates the mathematical model, applied to the synthesis of hyperboloid gear drives with taking into account the singularity appearance on the contacting active tooth surfaces. A kinematic approach for registration of the singularity on the tooth surfaces of the synthesized spatial transmissions is shown. The analytical dependencies applicable for defining and controlling of the singularities on the... Read more.
https://doi.org/10.5897/JMER2017.0423[Article Number: 3059C8164846]
Cross vane expander compressor (CVEC) is a newly invented expander-compressor combined unit, where it is introduced to replace the compressor and the expansion valve in traditional refrigeration system. The mathematical model of CVEC has been developed to examine its performance and it was found that the energy consumption of a conventional refrigeration system was reduced by as much as 18%. It is believed that this... Read more.
https://doi.org/10.5897/JMER2016.0403[Article Number: 0A9066362207]
Winnowing called “Dhan Battaune” in Nepali is the process of separation of unwanted matters from paddy after threshing. In the conventional method; it requires at least four person to produce strong wind by bamboo basket (“Nanglo” in Nepali) to blow away straw, leaves of grasses and other unwanted matters; process starting with one of them pouring the sun dried grains from certain height. To... Read more.
https://doi.org/10.5897/JMER2015.0377[Article Number: C7BC4E858951]
This paper reports on the application of a special purpose finite element analysis tool that combines augmented finite element methodologies (AFEM) and cohesive zone model (CZM) methods to simulate initiation and propagation of both cohesive and adhesive cracks. The constitutive behaviour of an aluminium/silicon carbide metal matrix composite was predicted and compared with experimental data as an example of a material... Read more.
https://doi.org/10.5897/JMER2015.0354[Article Number: 80B399455155]
The failure mechanisms and failure stress states of 2D and 3D FRP composite is investigated through experimental work, SEM, finite element analysis and failure theories. In this research work, feasibility of ASTM standard D6641 is investigated for testing of 3D FRP composite. A 3D finite element model is developed in ABAQUS with homogeneous orthotropic laminate to investigate the failure stress state in the gage section... Read more.
https://doi.org/10.5897/JMER2015.0347[Article Number: 16003AD54114]
This paper deals with the steady two-dimensional magnetohydrodynamic (MHD) stagnation-point flow of nanofluid and heat transfer with thermal radiation past a stretching/shrinking sheet in the presence of injection are investigated numerically and simulated with Maple 18 software. Brownian motion and thermophoresis are included in employed model of nanofluid simultaneously. The system of nonlinear ordinary differential... Read more.
https://doi.org/10.5897/JMER2014.0342[Article Number: 20E80A053033]
The paper presents a numerical method for analyzing the potential flow around two dimensional body such as single circular cylinder, NACA0012 hydrofoil and double circular cylinders by finite element method. The numerical technique is based upon a general formulation for the Laplace’s equation using Galerkin technique finite element approach. The solution of the systems of algebraic equations is approached by... Read more.
https://doi.org/10.5897/JMER2013.0298[Article Number: 54F88FB51920]
This paper evaluates numerically the dynamic behavior of structural composite laminate materials in relation to the angular change in fiber layers of the laminated composite. The behavior of the material is modeled through finite element method, where the First Order Shear Deformation Theory (FSDT) is used which is implemented on a rectangular element serendipity containing eight nodes. The mathematical modeling has... Read more.
https://doi.org/10.5897/JMER2014.0333[Article Number: 70EDB3D48242]
In this study, the effects of fuel injection discharge curve and injection pressure onpower upgrade of heavy-duty diesel engine by simulation of combustion process in AVL-Fire software are discussed simultaneously. Hence, the fuel injection discharge curve is changed from semi-triangular to rectangular which is usual in common rail fuel injection system. Injection pressure with respect to amount of injected fuel and... Read more.
https://doi.org/DOI 10.5897/JMER2014.0327[Article Number: 50622B147543]
Recently, high-tech industries such as semiconductor, aerospace, optoelectronics, precision manufacturing precision required for its products increasingly stringent and dust-free rooms operating environment of various pollutants control requirements are also increasing. Accuracy ventilation in dust-free room is related to the experimental results, proper ventilation can help reduce levels... Read more.
https://doi.org/10.5897/JMER2013.0292[Article Number: 489439241339]
The optimal preventive maintenance schedules of generating units for the purpose of maximizing economic benefits and improving reliable operation of 44 functional thermal generating units of Nigerian power system, subject to satisfying system load demand, allowable maintenance window and crew constraints over 52 weeks maintenance and operational period is presented. It uses HPSO algorithm to find the optimum schedule.... Read more.
https://doi.org/10.5897/JMER2013.0271[Article Number: 594186641339]
Cladding is a surface modification process in which a specially designed alloy is surface welded in order to enhance corrosion resistant properties. Common cladding techniques include Gas Tungsten Arc Welding (GTAW), submerged arc welding (SAW) and gas metal arc welding (GMAW). Because of high reliability, easiness in operation, high penetration good surface finish and high productivity gas metal arc welding... Read more.
https://doi.org/10.5897/JMER12.003[Article Number: 7BF784E41340]
Most manufacturing operations require periodic setups for product changes, process-control verifications or engineering evaluations. Setups performed in-line-on the tool in lieu of running product take away from production time and may be classified as waste. This paper focuses that, setup procedures should be analyzed to see if they can be done in parallel, off line, to allow production to continue.... Read more.
https://doi.org/10.5897/JMER2013.0284[Article Number: 6600B2240067]
Performance of a welding flux is decided by the physical and chemical properties of its constituents. The flux selected should show a good welding behavior and the required weld bead geometry. The mechanical properties of a joint are not only decided by its composition but these also depends on bead geometry, dimensions and physico-chemical properties of fluxes. These properties include surface tension, viscosity, heat... Read more.
https://doi.org/10.5897/JMER2013.0262[Article Number: 122F70E40069]
The effect of the geometric parameters and jet dynamics of the port array inverse diffusion flame (IDF) burner on the flame characteristics were investigated experimentally usingliquefied petroleum gas (LPG) fuel. The geometric parameters are the central air flow area, the fuel jets flow area, the number of the fuel jets and the radius of the pitch circle around which the fuel ports are arranged. The jet dynamics... Read more.
https://doi.org/10.5897/JMER2013.0267[Article Number: 5D0892640055]
Vegetable oils as fuel have received attention in recent years due to their advantages including renewable nature and domestically produced energy resources. Achieving reduced emission is important subject, as it enhances sustainability of biofuels. General factorial experimental design and analysis of variance (ANOVA) is used to analyze how NOx emission is influenced by alcohol content in vegetable oil-diesel fuel... Read more.
https://doi.org/10.5897/JMER2013.0275[Article Number: C2EA20540058]
This paper proposes a novel hybrid algorithm for the integration of systematic preventive maintenance policies in hybrid flow shop scheduling to minimize makespan. We have implemented a problem-solving approach for optimizing the processing time and methods based on metaheuristics. The proposed approach is inspired by the behavior of the human body. This hybridization is between a multi agent system and... Read more.
https://doi.org/10.5897/JMER10.059[Article Number: 159932D5941]
The cylindrical vessels are used for storing fluids at high pressure. If the magnitude of the internal/external pressure is closer to the yield strength of the material used, then no thickness of the material will prevent the failure of the vessel. Hence shrink-fitted compound cylinders are used, which can store the fluids at higher pressure closer to the yield stress of the material. Optimally designed... Read more.
Page 1 of 6, showing 20 records out of 109 total, starting on record 1, ending on 20