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56 articles for “surface crack”
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FAILURE ANALYSES OF 16MM THICK SA 516 GR 70 AUTO CLAVE
Abstract: With the acceleration of global industrialization, there is a demand for high- or low-pressure storage of liquids or gases. Because of the complicated operating conditions that will inevitably encounter a possible hazard, pressure vessel design is a critical responsibility. Previous failure studies have revealed that the presence of local loads and discontinuities increases pressure vessel fracture. As a result, a detailed examination of pressure vessel steel from the standpoint of …
Published in Trends in Mechanical Engineering & Technology · Vol. 12, Issue 1, 2022 · pp. 21–30 Read article
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Studies on Polymer Modified Bitumen with various Fiber Impregnation
Abstract: Transportation sector is showing immense growth in the recent decades, modern vehicles introduced require a more stable platform to run better. In terms of road construction, we are not yet reaching the modernized standards adopted by other countries and usage of modern and innovative road construction materials are yet to be used in transportation infrastructure sector. The available roads are also getting damaged due to improper maintenance of top layer …
Published in Trends in Transport Engineering and Applications · Vol. 1, Issue 3, 2014 · pp. 19–24 Read article
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Finite Element, Experimental, and Machine Learning-Based Optimization of Machining Stability for Polymer Composite Material Processing
Abstract: The machining of polymer composite materials, particularly fibre-reinforced polymer-matrix composites, requires stable spindle-tool performance to avoid delamination, fibre pull-out, matrix cracking, thermal softening, poor surface integrity, and premature tool wear. In line with the scope of the Journal of Polymer & Composites, this study presents an integrated finite element, experimental, and machine learning framework for improving machining stability during end-milling of composite material systems. The spindle-tool assembly is modelled using …
Published in Journal of Polymer & Composites · Vol. 14, Issue 4, 2026 Read article
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Finite Element Modelling of Contact Stresses in Helical Gear Systems
Abstract: Helical gears are widely used in modern power‐transmission systems because of their high load‐carrying capacity, smooth meshing action, and increased overlapping of gear teeth. However, the design of helical gear pairs is constrained by contact stresses generated at the mating tooth surfaces, which can lead to surface fatigue (pitting), micro-cracking, and ultimately gear failure. Traditional analytical methods, such as those of the American Gear Manufacturers Association (AGMA) or International Organization …
Published in Trends in Machine design · Vol. 12, Issue 3, 2025 · pp. 35–39 Read article
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Deformation and Densification Behaviour of Sintered Aluminium Alloy and Chromium Carbide Metal Matrix Preforms
Abstract: This paper presents comprehensive experimental results focused on the deformation and densification behavior of sintered AA2618 - 2% Cr3C2 metal matrix preforms. The study specifically examines preforms with varying aspect ratios subjected to a cold upsetting process. To create the powder preforms, an initial theoretical density of 89% was achieved using a cylindrical die on a 600 kN hydraulic press. The sintering process was conducted in an electric muffle furnace, …
Published in Journal of Polymer & Composites · Vol. 13, Issue 1, 2025 · pp. 125–131 Read article
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Poly Vinyl Alcohol/Kaolinite Clay/Grafted Cellulosic Fibre Based Hybrid Composite Films: Physical, Mechanical, Optical and Biodegdrability Studies
Abstract: In this study, physical, mechanical, optical, morphological and biodegdrability properties of poly vinyl alcohol (PVA)/kaolinite clay (KC)/grafted barley husk (GBH) based hybrid composite films were prepared by solution casting method. Barley husk was grafted with oleic acid using graft copolymerization method. The hybrid composite films were characterized by FTIR and SEM. Based on the findings from this work, water uptake of the composite films increased with increase in the amount …
Published in Journal of Polymer & Composites · Vol. 5, Issue 3, 2017 · pp. 41–52 Read article
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Optimization of Stellite Defect in Manufacturing of Engine Valves: A Review
Abstract: Intake and exhaust valves are the important components of an engine valves which are used to control flow and replacement of fuel gases inside the cylinder. This work mainly deals with defect known as stellite defect in different sizes of engine valves; and methodology adopted to prevent valve from stellite defect. Valve base material is low alloy steel (AISI 4140) and upper surface of engine valve is generally hard faced …
Published in Journal of Automobile Engineering and Applications · Vol. 3, Issue 1, 2016 · pp. 1–4 Read article
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Strength and Durability Characteristics of Fiber Modified Asphaltic Bitumen
Abstract: Flexible pavements with bituminous surfacing are widely used in India. Exponential increase in traffic, overloading of commercial vehicles and significant variations in daily and seasonal temperatures have shown some limitations of conventional bitumen performance. Earlydevelopments of distress symptoms like cracking, rutting, raveling, undulations, shoving and potholing of bituminous surfacing have been reported for flexible pavements. Toenhance the properties of road, bitumen is modified by the addition of some waste materials. …
Published in Journal of Structural Engineering and Management · Vol. 2, Issue 1, 2015 · pp. 13–17 Read article
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Effect of Heat Treatment on Mechanical Properties of Silver Nanoparticles Embedded in Phosphate Glasses
Abstract: AbstractSilver nanoparticles have been embedded in CaO-P2O5 and CaO-CaF2-P2O5 glasses using melt quenching technique and heat treatment process. The growth of silver nanoparticles in the glass matrix appeared to be time dependent. Mechanical properties such as Vickers hardness, fracture toughness and brittleness for the glass samples were evaluated using a Vickers Indentation technique. Variation in Vickers hardness, Fracture toughness, and brittleness was observed with an increase in the size of …
Published in Journal of Thermal Engineering and Applications · Vol. 5, Issue 3, 2018 · pp. 11–17 Read article
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Comprehensive Study on the Mechanical and Tribological Response of Waste Tyre Rubber–Natural Fiber Hybrid Epoxy Composites
Abstract: Research into the mechanical and tribological characteristics of Prosopis juliflora-fiber reinforced epoxy-matrix composites with recycled tyre rubber particles is the focus of this investigation. Making use of old tire rubber and bio-reinforcing with fibers from the common invasive plant Prosopis juliflora are the goals of the two-reinforcement techniques. The end goal is to produce long-lasting, cost-effective engineered composite materials with improved performance. A constant epoxy resin matrix was used to …
Published in Journal of Polymer & Composites · Vol. 14, Issue 4, 2026 · pp. 154–161 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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Mechanical and Morphological Characterization of Halloysite Nanotube (HNT) Reinforced Urethane Dimethacrylate (UDMA) Dental Composites
Abstract: Dental resin composites are widely used in restorative dentistry because of their excellent aesthetics, conservative cavity preparation, and satisfactory mechanical properties. However, their long-term clinical performance is limited by polymerization shrinkage, wear, microcrack formation, water absorption, and degradation in the oral environment. This study investigates the mechanical and morphological characteristics of Halloysite Nanotube (HNT)-reinforced Urethane Dimethacrylate (UDMA) dental composites to enhance the structural performance and durability of restorative materials. UDMA-based …
Published in Journal of Polymer & Composites · Vol. 14, Issue 4, 2026 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 Corrosion on Flexural Strength of Reinforced Concrete Beam: An Experimental Study
Abstract: AbstractThe main aim of this experimental study is to investigate the effect of corrosion on reinforced concrete beams, particularly on load deflection behavior, load carrying capacity and crack width by using with or without epoxy coating on the steel surface. Accelerated corrosion technique was adopted to corrode the beam experimentally. The corrosion was measured using the Open Circuit Potential (OCP) measurement instrument. A total of 14 simply supported beam specimens …
Published in Recent Trends in Civil Engineering & Technology · Vol. 7, Issue 3, 2017 · pp. 1–7 Read article
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Experimental Study on Compressive Strength of Ferrocement
Abstract: AbstractFerrocement construction technology is quite popular throughout the world. Ferrocement as thin material can be used as building components as well as a repair material. Ferrocement composite consists of cement-sand mortar with wire mesh to produce elements of small thickness having high durability, resilience and when properly shaped, it has high strength and rigidity. Ferrocement differs from conventional reinforced concrete or prestressed concrete primarily on the basis of nature, placing …
Published in Journal of Construction Engineering, Technology & Management · Vol. 7, Issue 3, 2017 · pp. 25–29 Read article
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A non-hydrotreated feedstock’s polyaromatic cracking under FCC industrial operating conditions using an equilibrium catalyst
Abstract: Catalytic cracking of non-hydrotreated atmospheric residue’s main polyaromatic hydrocarbon (PAHs) in the presence of an equilibrium catalyst was investigated under industrial operating conditions. During the fluid catalytic cracking process, the catalyst that presented the key factor in hydrocarbon cracking (aromatic by hydrogen transfer reaction) quickly deactivated and compromised the process’s performance due to its acid surfaces and pores covered by the polyaromatic species. A deep study of the catalyst behavior …
Published in Journal of Catalyst & Catalysis · Vol. 12, Issue 1, 2025 · pp. 10–26 Read article
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Metal corrosion prevention control with uses of sol-gel coatings
Abstract: The potential for sol-gel generated films to replace methods for pre-treating metal surfaces with chromate is very high. Metallic and organic paint can be painted on with good adherence thanks to inorganic sol-gel generated coatings. Their significant crack-forming propensity prevents them from offering appropriate corrosion protection. A thicker, more flexible, functionalized film is produced with improved compatibility to various organic top coatings when an organic component is added to an …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 9, Issue 2, 2022 · pp. 22–26 Read article
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Probable Causes of Cracks on selected Buildings at Akrowa in Afigya Kwabre District, Ghana
Abstract: This work evaluated the nature of the foundation soils and cracks on twelve representative buildings at Akrowa, in the Afigya Kwabre District near Kumasi in Ghana. Age, material used whether clay/concrete, dimensions of cracks on the buildings and tests for geotechnical parameters of foundation soils such as moisture content, bulk density, specific gravity, particle size distribution, Atterberg limit and direct shear were carried out on soils from four pits dug …
Published in Journal of Geotechnical Engineering · Vol. 10, Issue 3, 2023 · pp. 29–39 Read article
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Mechanical Characterization of Kevlar 49 and Pina Fiber Hybrid Composites
Abstract: The pursuit of sustainable yet high-performance materials has accelerated research into hybrid composites that combine synthetic and natural fibers. This study investigates the fabrication and characterization of a Kevlar 49/Pina fiber hybrid composite using epoxy resin as the matrix. Kevlar 49, known for its exceptional tensile strength and energy absorption, was employed as the face sheet material, while Pina fiber, a biodegradable reinforcement extracted from pineapple leaves, was incorporated as …
Published in Journal of Polymer & Composites · Vol. 14, Issue 1, 2026 · pp. 301–316 Read article
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Twin Roll Casting of Aluminum Alloy AC7A
Abstract: Twin roll casting process is able to produce a strip from molten metal directly. Thus this process has a possibility to reduce total cost of sheet making comparing to conventional rolling process. Strip casting process has some disadvantages. Casting speed depends on the material properties. It is difficult to determine the casting conditions. Twin roll casting of aluminum alloy AC7A using commercial scale machine was operated. The aims of this …
Published in Journal of Thin Films, Coating Science Technology & Application · Vol. 7, Issue 2, 2020 · pp. 30–36 Read article