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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 49 for “"Maximum strength"”.
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Design of Variable Stiffness Composite Panels for Maximum Strength
… composites have been shown to exhibit increased strength and stiffness over traditional constant stiffness composites by tailoring fiber orientations for specific load conditions. This is achieved by allowing the fiber orientation to vary spatially across the design domain. Motivation for new …
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Anthropometric, Strength, and Power Determinants of Throwing Performance in Collegiate Throwers.
… this study was to identify the anthropometric, strength, and power characteristics that best predict throwing performance. Seventeen male D-I throwers (age = 19.1 ± 1.2 y; body mass = 115.1 ± 15.3 kg; height = 1.85 ± 0.06 m) were assessed for maximum strength and power. A five variable linear …
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Analysis and design of composite curved frames
… in the two design variable case, minimum weight, maximum strength, and combined minimum weight and maximum strength. Only the minimum weight formulation is used in the five design variable case due to the complexity of the design space. The design studies demonstrate the accuracy and efficiency of …
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Sex differences in the neural control of muscle
Sex-differences in muscle strength have been linked to differences in muscle size, involved limb, and daily activities. Early work has shown that sex-differences are greater in the upper compared to lower limb, making the upper limb an ideal model to investigate the best statistical approaches for …
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An experimental/analytical investigation of combined shear/end loaded compression strength testing of unidirectional composites
… press processing. Experimental results include strengths and failure modes for both tabbed and untabbed coupons tested by the combined loading ELSS method, and these data are compared to the results by the IITRI method. Strength was found to increase with increasing clamping, but reached a …
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An experimental investigation of the Buneman instability
… short (200 nsec duration) electric field pulse (maximum strength 650 V/m) is applied to accelerate electrons to a drift velocity vD much larger than the initial thermal velocity VTH. The device has a major radius of 19 cm and a minor radius of 3 cm, and a plasma having an electron density of 4 x …
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Effects of Short-Term Resistance Training on Adult Men and Women with and without Metabolic Syndrome.
… blood pressure, and blood lipids and enhanced maximum strength, rate of force development, and power. These enhancements may translate into a better quality of life. As a result, resistance training can be used as a valuable tool in ameliorating the effects of a sedentary lifestyle, including …
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Physiological and Performance Effects of 11 Weeks of Training in Division 1 Collegiate Throwers: An Exploratory Study.
… throughout the study. Measurements of maximal strength (isometric mid-thigh pull), vertical jumping ability, dynamic mid-thigh pulls (across a spectrum of loads), hormones (testosterone and cortisol), and adipokines (adiponectin, leptin, and resistin) were taken at weeks 1, 7, and 11. The …
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A coupled atmosphere-ocean model of thermohaline circulation, including wind-driven gyre circulation with an analytical solution
… method of Krasovskiy and Stone (1998). At the maximum strength of wind-forced circulation studied, v = 5 x 10-¹¹ s-¹, a stable thermal mode equilibrium temperature difference of 25 K is calculated. Once v reaches a critical value, which is within the range of physically reasonable values, the …
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Strength Calculation Model for Standoff Screws in Composite Joists
… 8 standoff screws. The goal is to develop a strength prediction equation and determine reliability parameters compatible with the Load Factor Resistance Design (LRFD) procedure that would allow the use of this shear connector in design of composite floor systems. The study considers results …
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Evaluation of the ductility of composite steel I-girders in positive bending
… AASHTO bridge specifications limit the allowable maximum strength of simple spans and positive bending regions with adjacent compact pier sections to a value between the full plastic moment and the hypothetical yield moment of the cross section. The equation used for this strength prediction is …
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Molecular Dynamics Simulation of Forsterite and Magnesite Mechanical Properties: Effect of Carbonation on Comminution Energy
… Forsterite is found relatively hard and shows maximum strength before deformation compared to magnesite. The stiffness of magnesite decreases at elevated temperatures which reduces the energy requirement for the comminution process. We also looked at how pressure and temperature changes …
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Lyocell Fiber-Reinforced Cellulose Ester Composites-Manufacturing Considerations and Properties
… with uniform matrix distribution, high tensile strengths and high modulus, and even wetting of fibers by CAB. A maximum tensile modulus of 21.5 GPa and a maximum strength of 251.7 MPa were achieved for a continuous fiber reinforced composites at a volume fraction of 66.5% compared to 0.8 GPa and …
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Influence of penetration force in clay soils due to speed rate effect
… to control unlike higher speed. Besides that, maximum strength was achieved when test reach to standard speed of penetration and reducing when the rate exceeds the 2.5 cm/s speed. These findings may serve a wide range of industrial applications whereby require the solution of time domain …
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Comparison of lower extremity strength and strength symmetry among U.S. Ski Team sports
… competitors. Purpose: Compare lower extremity strength limb symmetry index (LSI) and relative strength (RS) among alpine, mogul, and aerials ski competitors. Methods: Archival data from 156 males and females from the U.S. Ski Team at Olympic, World Cup, and national levels were analyzed to …
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Lightweight concrete : investigations into the production of natural fiber reinforcement
… and with various materials to alter its strength, density and porosity, amongst other properties. Concrete which is used commonly in construction of columns, beams, and slabs acts well in compression but fails under tension. The common solution is to reinforce the structure in areas where …
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Effect of freezing and thawing on unconfined compressive strength of clay-lime mixture with and without air entraining agent
… effect of freezing and thawing on the loss in strength of lime-soil mixture. 2. To investigate the effect of the addition of an air entraining agent on the freezing and thawing durability of lime-soil mixtures. For the first part, twelve specimens were prepared for each of 0, 5, 10, 15 and 20 …
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Lightning impulse tests on air-breakdown level in point-plane electrode configuration
… characteristic of the air breakdown voltage and maximum electric field between the conducting point and plane electrodes, the electrodes is taken into considered in this work using FEMM simulation. The air breakdown voltages between the electrodes (point and plane) are measured by conducting the …
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Effect of various water-reducing admixtures on the strength and workability of concrete
… entrained air (if any), were much smaller. The strength of the stiff mixes, when used as recommended, compared favorably with plain mortar. The strength of the fluid mixes did not compare as favorably with plain mortar as did the others. However, if a constant workability had been maintained, …
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Geometric modelling and shape optimisation of pharmaceutical tablets. Geometric modelling and shape optimisation of pharmaceutical tablets using partial differential equations.
… packaging and loading conditions before use. The strength of the produced tablets, which is characterised by their compressibility and compactibility, is usually deter-mined through a physical prototype. This process is sometimes quite expensive and time consuming. Therefore, simulating this …
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