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984 articles for “Pre-stressing”
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Chemical Reactor Design and Analysis: A Review
Abstract: Chemical reactors play a critical role in industries such as oil and gas, chemical processing, and power generation, where they operate under extreme pressure and handle highly toxic, compressible fluids. The growing need for alternative energy sources has led to an increased demand for vessels capable of withstanding high pressure and temperature, especially in the chemical and petroleum industries. Recent innovations in chemical reactor technology have concentrated on creating new …
Published in Recent Trends in Fluid Mechanics · Vol. 12, Issue 2, 2025 · pp. 49–59 Read article
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Role of Endogenous and Exogenous Glutathione in the Detoxification of Free Radicals
Abstract: The aging process and disease progression are the result of cellular damage by free radicals. Our first lines of defense against free radical damage are the antioxidants. They are critical for keeping optimal health and wellbeing. The need for antioxidants becomes more critical with increased exposure to free radicals. Pollution, drugs, cigarette smoke, illness, stress, and even exercise can increase free radical exposure. The accumulation of free radicals produced from …
Published in Research and Reviews: A Journal of Toxicology · Vol. 7, Issue 1, 2017 · pp. 1–14 Read article
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Sensitivity of Rigid Pavement Responses to Pavement Layer Thickness Due to Wheel Load: A Nonlinear Finite Element Study
Abstract: The behavior of a jointed plain concrete pavement (JPCP) has been investigated under single wheel load for interior loading using finite element technique to predict the critical pavement responses for both linear and nonlinear geometrical characterization. The idealized pavement system is analyzed using 3D finite element analysis with the general purpose finite element software ABAQUS. The developed 3D model was analyzed for four combinations of material characterizations- (1) linear base …
Published in Trends in Transport Engineering and Applications · Vol. 1, Issue 1, 2014 · pp. 1–9 Read article
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Climate-Induced Infertility in Dairy Cows: Pathways, Challenges, and Solutions for Sustainable Dairy Development
Abstract: Climate change has emerged as a significant challenge to dairy production, with profound implications for reproductive performance in dairy cows. The interplay of rising temperatures, fluctuating rainfall patterns, and increased frequency of extreme weather events disrupts key physiological, nutritional, and behavioral processes essential for fertility. Heat stress alters hormonal balance, impairs oocyte and embryo quality, reduces estrus expression, and affects pregnancy outcomes. Concurrently, climate-induced nutritional deficits, immune suppression, and increased …
Published in International Journal of Climate Conditions · Vol. 2, Issue 2, 2025 Read article
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The Role of Optimism in Reducing Psychological Distress Amongst Women in Urban Areas
Abstract: This paper aims to explore the role of optimism in reducing psychological distress among women living in urban areas. Psychological distress, encompassing anxiety, depression, and chronic stress, has become increasingly prevalent due to the fast-paced and demanding nature of urban life. Women, in particular, face unique stressors including work-life imbalances, financial pressures, safety concerns, and societal expectations, which contribute significantly to elevated levels of mental strain. Finding healthy coping strategies …
Published in International Journal of Trends in Humanities · Vol. 2, Issue 2, 2025 Read article
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Evaluation of Effect of Rasayana Ghana Tablet (An Ayurvedic Formulation) in Management of Akala jara (Premature Ageing)
Abstract: In the present era of stress, when lifestyle disorders are on the rise, premature ageing is also one of the most prevalent disorders. Ayurvedic Rasayana (rejuvenator) drugs can provide solution for this. The present study was aimed to evaluate the efficacy of Rasayana Ghana tablet (RGT) in management of premature ageing. In this placebo-controlled randomized prospective clinical study, Rasayana Ghana tablet based upon the classical combination of Gokshura (Tribulus terestris …
Published in Journal of AYUSH: Ayurveda, Yoga, Unani, Siddha and Homeopathy · Vol. 1, Issue 1-3, 2012 · pp. 77–88 Read article
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Effect of Seaweed Extracts Mediated Changes in Leaf Area and Pigment Concentration in Soybean under Salt Stress Condition
Abstract: In the present investigation, an attempt has been made to study the effect of SLF from Sargassum wightii and Ulva lactuca with or without chemical fertilizer on seed germination, growth, yield, pigment content and soil profile of Soybean (Glycine max L. Merr.). The seed germination, growth and yield parameters such as shoot length, root length, number of lateral roots, number of leaves, photosynthetic pigment concentration such as chlorophyll “a”, chlorophyll …
Published in Research and Reviews : A Journal of Life Sciences · Vol. 3, Issue 1, 2013 · pp. 17–21 Read article
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FE Analysis and Experimental Validation of Residual Stresses in Arc Welding
Abstract: This paper presents finite element analysis (FEA) of residual stresses developed in arc welded butt joints. Residual stresses attributed to welding pose significant problems in the accurate fabrication of structures because these stresses heavily induce brittle fracturing and degrade the buckling strength of welded structures. Therefore, estimating the magnitude and distribution of welding residual stresses and characterizing the effects of certain welding conditions on the residual stresses are deemed necessary.Keywords: …
Published in Journal of Experimental & Applied Mechanics · Vol. 6, Issue 1, 2015 · pp. 7–18 Read article
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Optimization of Type-4 Plastic Liner Composite Overwrapped Pressure Vessel Design
Abstract: Composite Overwrapped Pressure Vessels (COPVs) are prominently utilized for the storage of gases at high-pressure. Their widespread adoption is because they are significantly lighter weight compared to complete metal counterparts, but requires specialized design, and manufacturing process. This research employs finite element modelling to analyse the stress and failure assessments on a specific Type-IV COPV with plastic liner as core cylinder. This study aims to optimize COPV design by considering …
Published in Journal of Polymer & Composites · Vol. 13, Issue 3, 2025 · pp. 405–412 Read article
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Transient Heat Shock Induces Oxidative Stress in Mice Testes. Amelioration by Selenium and Vitamin E
Abstract: The present study evaluated the role of Selenium (0.5 ppm selenium/kg diet) and Vitamin E (200 mg alpha-tocopherol/kg diet) (as antioxidants) in modulating the oxidative stress induced during transient heat shock (42°C-30 mins) in mice testes. Study included six different groups of male Balb/c mice; Control, Heat shock, Selenium, Selenium+heat shock, Vitamin E and Vitamin E+heat shock. Sperm parameters viz. sperm concentration and sperm motility, LPO and ROS levels, GSH, …
Published in Research and Reviews : A Journal of Life Sciences · Vol. 9, Issue 2, 2019 · pp. 17–31 Read article
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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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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 Trends in Mechanical Engineering & Technology · Vol. 4, Issue 2, 2014 · pp. 39–46 Read article
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Stress Analysis of Variable Thickness FGM Rotating Disks by Element based Material Gradation under Thermomechanical Loading
Abstract: The present research work aims to analyze deformation and stresses, induced in functionally graded rotating disks of variable thicknesses. The disks are made of exponential functionally graded material, whose mechanical and physical properties vary in radial direction. Functionally gradation of the properties is achieved by element-based gradation. Uniform as well as variable thickness, namely concave profile, convex profile and linear varying profile rotating disks are analyzed for clamped-free and free-free …
Published in Trends in Machine design · Vol. 3, Issue 3, 2016 · pp. 32–42 Read article
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Self Esteem and Sociotropy - Autonomy as predictors of Workplace Burnout among Private Sector Employees
Abstract: Workplace burnout is a growing concern in the private sector, where employees face intense performance pressures, leading to stress and reduced productivity. While job-related factors are well-documented contributors, the role of personality traits in burnout remains an area of interest. This study examines the impact of Self-Esteem, Sociotropy, and Autonomy on Workplace Burnout among private sector employees. A sample of 120 employees was analyzed using ANOVA, Pearson correlation, and multiple …
Published in International Journal of Behavioral Sciences · Vol. 2, Issue 2, 2025 · pp. 81–89 Read article
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Contributing factors in the initiation of failure of asphalt concrete
Abstract: As long as the asphalt concrete pavement is under service, signs of failure usually initiate and the distress types start showing throughout the service life. The asphalt concrete pavement practices repeated tensile and shear stresses through the vehicular loading. In the present study, the contributing factors in the initiation of failure under repeated flexural stresses have been detected. Slab samples of Asphalt concrete have been prepared at the laboratory by …
Published in Trends in Transport Engineering and Applications · Vol. 10, Issue 1, 2023 · pp. 55–61 Read article
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Experimental Techniques for Fatigue Analysis of a Small Wind Turbine Blade
Abstract: During the life span, a wind turbine blade experiences variety of the forces. These forces include gravitational force, centrifugal force, tangential force, thrust force, etc. Thrust force and gravitational forces create edgewise bending stress while the tangential forces (wind pressure) create flapwise bending stress. Centrifugal forces generate direct stress in the wind turbine blade. Most of the wind turbine blades fail due to bending in the flapwise direction. These induced …
Published in Journal of Experimental & Applied Mechanics · Vol. 7, Issue 1, 2016 · pp. 34–38 Read article
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A study to investigate the shear strength resistance of Ennore sand from conventional direct shear test.
Abstract: In this article analysis of shear strength parameters of Ennore Sand is given using the direct shear test. The shear strength parameters of cohesion and angle of shearing resistance are employed in the construction of geotechnical constructions to describe the soil's ability to sustain shear stress when subjected to a certain load. These might be measured using laboratory or field testing. When shearing a sample in a direct shear apparatus, …
Published in Journal of Geotechnical Engineering · Vol. 9, Issue 3, 2022 · pp. 19–26 Read article
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Bonding Strength Characteristics of FRP Cylindrical Composites Under Hygrothermal Loading
Abstract: This study investigates the bonding strength characteristics and stress distribution patterns in fiber-reinforced polymer (FRP) cylindrical composites subjected to hygrothermal loading conditions. A four-phase cylindrical model incorporating AS-Graphite and S-Glass fibers with low modulus epoxy coating was analyzed under four distinct pressure loading conditions (25.984, 38.976, 77.953, and 155.906 MPa). Comprehensive stress analysis revealed significant variations in von-Mises stress, maximum principal stress, and minimum principal stress across fiber, coating, matrix, …
Published in Journal of Polymer & Composites · Vol. 14, Issue 3, 2026 · pp. 950–967 Read article
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Investigation of Optimum Stress Concentration Factor for Shoulder Fillet in Round Bar under Different Loading Conditions
Abstract: The focus of this study is to investigate the optimal fillet radius of shoulder fillet in round bar which gives minimum stress concentration factor under different loading conditions i.e. torsional, bending and axial. Peterson’s curves were developed based on experimental work and analytical work carried out by number of researchers in the past. In that curves it is stated that the r/d ratios in the curves were taken from the …
Published in Trends in Mechanical Engineering & Technology · Vol. 8, Issue 2, 2018 · pp. 18–26 Read article
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An Assessment of Structural Safety of Cement Mortar Lined Irrigation Water Pipeline by Hydrostatic Test
Abstract: Structural safety of cement mortar-lined water pipeline is a matter of great concern primarily due to weld defects, fabrication deficiency and assessment of pressure shared by lining. The verification of structural design of such pipeline and assessment of safety is generally carried out by conducting prototype hydrostatic test. The present paper is based on one such type of study conducted by CWPRS, Pune, for Guthpha Lift Irrigation Scheme, Nizamabad, Andhra …
Published in Journal of Water Resource Engineering and Management · Vol. 1, Issue 1, 2014 · pp. 1–5 Read article