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245 articles for “Fractures”
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Evaluation of J-Integral and Fatigue Crack Growth Rate of Semi-elliptical Crack in Compressor Blade
Abstract: Gas turbine compressor blades are subjected to centrifugal, gas bending and vibratory loads. This repeated loading and unloading can reduce the life of compressor blades. This research aims at the estimation of fatigue crack growth rate of various three-dimensional cracks in a compressor blade considering the J-integral calculations for a semi-elliptical crack, subjected to centrifugal loading. Static stress analysis was carried out to ascertain the critical region or crack zone …
Published in Journal of Mechatronics and Automation · Vol. 1, Issue 2, 2014 · pp. 39–46 Read article
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A Review on Water Level Monitoring System
Abstract: AbstractWater stored up beneath the Earth’s surface is called the groundwater. It is present in soil pore spaces and in the fractures of rock formations. Groundwater constitutes of soil moisture, permafrost, immobile water, and deep geothermal or oil formation water. Groundwater forms the most important water source in countries like India. About 85% of drinking water in India is from groundwater and 51% of the total population in the United …
Published in Journal of Microcontroller Engineering and Applications · Vol. 5, Issue 2, 2018 · pp. 16–18 Read article
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Experimental Evaluation and Optimization of Dry Drilling Parameters of Stainless Steel Using Different Drill Bit
Abstract: Drilling is one of the widely used in machining processes for various purposes. Stainless steel is frequently used in automotive, aircraft and aerospace and dies or mold industries, home appliances, medical and electrical equipment, but machining of stainless steel is difficult due to high tensile strength, high ductility, low heat conductivity and high fracture toughness. The cutting temperature at drill tool-chip interface affects drill hole quality, lowers the tool life, …
Published in Journal of Materials & Metallurgical Engineering · Vol. 7, Issue 1, 2017 · pp. 43–48 Read article
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Correlating the Damage Behaviour of Polymer Composites with the Potential Energy of the Impactor
Abstract: Design of structures using composites requires comprehensive evaluation and characterization of mechanical properties in both undamaged and damaged state. Composite laminates undergo combinations of mechanical loading resulting into microdamage accumulation in the plies. The first mode of damage is usually intralaminar cracking with the crack plane transverse to the middle plane of the laminate, spanning the whole width of the laminate. The density of cracks in a ply depends on …
Published in Journal of Materials & Metallurgical Engineering · Vol. 4, Issue 2, 2014 · pp. 1–9 Read article
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Preparation and Characterization of a Novel Lignocellulosic Fiber from Calotropis gigantea Stem Fiber for Thermoplastic Composites
Abstract: In the current article, Calotropis gigantea fiber mat (CGM)/thermoplastic polypropylene (PP) strengthened non-woven unidirectional composites were successfully manufactured by hot compression molding using the film piling method. Micromechanical and physicomechanical properties such as tensile, flexural, compressive, impact properties, thickness, swelling, and water absorption of CGM/PP composites were evaluated for the effects of CGF composition, mercerization of CGF as well as the inclusion of two types of coupling agents (vinyltriethoxysilane and …
Published in Journal of Materials & Metallurgical Engineering · Vol. 12, Issue 1, 2022 · pp. 15–33 Read article
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Study of Mechanical and Thermal Properties of Unsaturated Polyester/CuO Nanocomposites
Abstract: AbstractThe CuO nano particles were synthesized from copper sulfate pentahydrate aqueous solution under the low hydrothermal condition at 80°C. The size of the CuO nanoparticles was calculated from TEM. FTIR spectra confirmed the formation of the CuO nanoparticles. Nanocomposites of unsaturated polyester resin with different loading of nano CuO fillers were prepared by casting method. The mechanical properties of the composites such as tensile behavior, flexural behavior, impact strength and …
Published in Journal of Polymer & Composites · Vol. 3, Issue 3, 2015 · pp. 35–42 Read article
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A Study on the Sintering Behavior of Al2O3/Y2O3 Doped ZrO2 Composites
Abstract: AbstractZirconia ceramics are widely used as cutting tools due to their very high hardness, excellent fracture toughness, flexural strength, and wear-resistance properties. Tetragonal zirconia exhibits better mechanical properties due to the transformation toughening of zirconia. The superior mechanical properties in zirconia are mainly due to higher density and controlled microstructure. In the present work, an attempt has been made to prepare near full-dense zirconia bodies with controlled microstructure by optimizing …
Published in Journal of Polymer & Composites · Vol. 2, Issue 1, 2023 · pp. 1–8 Read article
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An Assessment of Interfacial Chemistry and Character of Fiber/Polymer Microcomposites
Abstract: AbstractThe interfacial chemistry and character of hygrothermally treated E-glass/epoxy microcomposite have been investigated by Fourier transform infrared spectroscope (FTIR-imaging), temperature-modulated differential scanning calorimeter (TMDSC) and scanning electron microscope (SEM) techniques. The physico-chemical interactions occurring between absorbed water molecules and the network of a tetrafunctional epoxy resin were studied by FTIR-imaging. This is used to study the mechanistic details of epoxy curing on the molecular level. Absorbance peaks of OH stretching …
Published in Journal of Polymer & Composites · Vol. 1, Issue 1, 2013 · pp. 1–5 Read article
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Optimization of Dry sliding Wear Performance of pongamia oil cake filled Basalt Epoxy Composites by Taguchi Approach
Abstract: The study finds a possible utilization of natural pongamia oil cake for developing a new vista in the incorporation of the oily nature of natural waste material into polymer matrix composites. The woven basalt fibres were reinforced within an epoxy matrix incorporated with distinct weight percentages of pongamia oil cake (up to 6wt. %) and composite samples were composed by using resin transfer moulding process. The experimentation has been carried …
Published in Journal of Polymer & Composites · Vol. 7, Issue 2, 2019 · pp. 8–16 Read article
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Effect of Length and Tenor of the Introduction of Sansevieria cylindrica Fibers on the Mechanical Performance of Natural Fiber Composites
Abstract: The substitution of synthetic fillers, such as carbon black, with biobased ones in natural rubber (NR) is a trend of interest in view of increased sustainability and exploitation of agroforest waste in the materials sector. In this work, NR was filled with short fibers extracted from Sansevieria cylindrica (SC) leaves of various length (10, 20, 30, or 40 mm) and in different amounts (3, 6, or 10 g per 100 …
Published in Journal of Polymer & Composites · Vol. 11, Issue 2, 2023 · pp. 94–101 Read article
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Enhanced Oil Recovery (EOR) Process through Miscible Gas Injection: A Case Study of an Iranian Oil Reservoir
Abstract: Speedy computers and development in equations’ numerical solutions have enhanced applying simulation to predict the behavior of oil and gas reservoirs. The pressure in hydrocarbon reservoirs reduces overtime due to utilization of oil and gas resources until the fluid pressure itself is no more able to transfer it to the surface, and even if it reaches to the surface, its production is not cost-effective. Whereas, large amounts of hydrocarbon resources …
Published in Journal of Petroleum Engineering & Technology · Vol. 5, Issue 2, 2015 · pp. 1–8 Read article
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Flexibility Analysis of Refinery Piping System
Abstract: Piping systems in downstream refineries and process plants experience a great thermal strain due to the difference between ambient and operating temperatures of process and utility fluid flowing through them. This thermal growth causes thermal stresses which leads to failure in piping components like flange leakage, deflection in piping, fractures at nozzle juncture and other fatal errors in piping system. Therefore, these piping structures must be flexible enough to support …
Published in Journal of Petroleum Engineering & Technology · Vol. 5, Issue 2, 2015 · pp. 53–59 Read article
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Underbalanced Drilling and Its Advancements: An Overview
Abstract: Ever increasing global energy demand associated with depletion of conventional hydrocarbon resources drives exploration and production (E&P) industry to invent advanced new technologies in frontier areas of drilling, production and reservoir engineering to enhance hydrocarbon production from unconventional resources or depleted reservoirs. Demand to produce from a low pressure marginal reservoir and the discoveries of naturally fractured reservoirs lead to the development of new drilling techniques like underbalanced drilling along …
Published in Journal of Petroleum Engineering & Technology · Vol. 4, Issue 2, 2014 · pp. 37–51 Read article
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Thermodynamic modelling of the effects of high temperatures on brine fluid density
Abstract: Current trends in oil discoveries points to deep water zones characterized by temperatures ranging from 150oC to 350oC which needs good prediction of the fracture pressure and pore pressure hence imperative to continually understand temperature-density relationships of the fluids which are pumped downhole for well control. This paper seeks to propose a new, cost effective and easier method of estimating the reduction in density of brine completion fluid as it …
Published in Journal of Petroleum Engineering & Technology · Vol. 9, Issue 1, 2019 · pp. 26–35 Read article
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Simulation Studies on Effect of Parameters on to the Matrix Acidizing
Abstract: Matrix acidizing entails introducing an acid solution into the formation at a pressure lower than the fracture pressure in order to dissolve some of the minerals present. The major objective of removing the formation damage close to the wellbore, therefore restoring the natural permeability and greatly rising the well productivity. This paper is a simulation study on matrix acidizing of both sandstone and carbonate reservoirs using MATLAB software. Design parameters …
Published in Journal of Petroleum Engineering & Technology · Vol. 11, Issue 2, 2021 · pp. 25–34 Read article
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Effect of Varying Particle Size and Content of Barley Husk on the Physical, Mechanical and Diffusional Properties of Poly Vinyl Alcohol/Barley Husk Composite Films
Abstract: Poly vinyl alcohol (PVA)/natural barley husk (NBH) composite films were prepared using solution casting method. The influence of content (5, 10, 15, 20 and 25 wt%) and particle size (89, 152, 251, 354 and 599 µm) of NBH on the physical, mechanical and diffusional properties of composite films were evaluated. Tensile strength and elongation of the composite films decreased by 55.73 and 59.48% and young’s modulus increased by 76.46% with …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 4, Issue 3, 2017 · pp. 27–35 Read article
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Effect of Process Parameters on TIG Weld-Brazing of Aluminum Alloy to Galvanized Steel
Abstract: AbstractAbility to join aluminum alloy to steel enables weight reduction of automobile bodies. Gas tungsten arc welding (GTAW) process was employed to weld-braze A8011-H14 aluminum alloy to galvanized steel in lap configuration. The influence of heat input on bead formation and joint strength was investigated. The microstructural characterization was carried out using an optical microscope and scanning electron microscope. The chemical composition was analyzed using energy dispersive spectroscopy technique. The …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 5, Issue 3, 2018 · pp. 8–14 Read article
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Processing of Magnesium Metal Matrix Composite Reinforced with Graphene Nano Platelets through Vacuum Stir Casting and Investigating its Mechanical Behaviour
Abstract: AbstractThe application of metal matrix composites (MMCs) as structural engineering materials has received increasing attention in recent years. Their high strength and toughness at elevated temperatures coupled with low-density makes them suitable for use in applications where conventional engineering materials, such as steel are used. MMCs exhibit significantly higher stiffness and mechanical strength compared to matrix alloys, but often suffer from lower ductility and interior fracture toughness. MMCs have the …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 5, Issue 3, 2018 · pp. 21–29 Read article
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The Mechanical Properties of Manganese Chloride Salt Reinforced [PVA: PVP] Blend Films
Abstract: In this study, pure [PVA: PVP] polymer blend film and MnCl2·4H2O salt reinforced polymer blend films at different weight ratios (10–50) wt%) were prepared by using the casting method. The effect of salt weight ratio on the mechanical properties of the [PVA: PVP] polymer blend films reinforced by MnCl2·4H2O salt was also studied. The experimental results obtained from the tensile test of the [PVA: PVP] polymer blend films reinforced by …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 8, Issue 2, 2021 · pp. 16–23 Read article
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Identification of Groundwater Potential Zones using Remote Sensing and GIS: a case study of watershed, Maharashtra, India.
Abstract: Water is one of the vital source for all livings beings for their survival. Water is needed for many activities like agriculture, industries, domestic, drinking and many other purposes. If we consider the earth as a whole, water covers the major portion of the earth. But among the total water on the earth, fresh water reserves are very less that is only 2.5%. Also the water availability is unevenly distributed …
Published in Journal of Water Resource Engineering and Management · Vol. 5, Issue 1, 2018 · pp. 14–24 Read article