Global ETD Search
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 31 for “"Thermal Strain"”.
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Low cycle fatigue life improvements realized by reduced thermal strain due to flange separation in bolted joints
… in this paper, flange leakage is shown to reduce thermal gradients and improve LCF life by approximately 50%. While this paper focuses on only one of the many important facets in bolted joint methodology, effort is made to show the benefit in the inclusion of flange leakage assumptions. The …
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Performance and thermal impact analysis of single cell solid oxide fuel cell by utilizing different fuels and its upgradation to stack level
… reacting flows, heat transfer, and thermal impacts (thermal strains and stresses) of solid electrolyte and porous electrodes for analysing the cell performance. The model is tested and the simulation results of hydrogen fuel SOFC performance are verified with the bench mark data of …
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The effects of hand and forearm cooling on self-paced cycling performance in the heat.
… continuous, localized cooling would attenuate thermal strain and improve thermal sensation, thereby enhancing performance during a 20-km cycling time trial (TT). Ten trained cyclists (7 male, 3 female) completed three randomized trials in a hot environmental chamber (35°C, 50% RH), immersing …
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Application of a Fabry-Perot interferometer for measuring machining forces in turning operations
… optic sensor was able to detect increases in strain corresponding to force increases detected by a dynamometer. The FP interferometer system must progress in several ways. A better data acquisition and data analysis system must be developed. A robust sensor must be made to withstand the harsh …
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High-Intensity Interval Training in the Heat
… recovery mode influence work rate adjustments, thermal and cardiovascular strain, and maximal aerobic capacity (V̇O2max). Three studies investigated these outcomes between the first and fifth round of HIIT (8-min warm-up and rounds of 4-min work×3-min recovery). V̇O2max was measured on separate …
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Thermal creak induced dynamics of space structures
… may be subjected to a continually changing thermal environment due to Earth eclipse transients and changes in the spacecraft orientation. During the transient thermal state, components in a structure may experience different amounts of thermal strain due to temperature gradients or …
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Thermoelastic control of adaptive composites for aerospace applications using embedded nitinol actuators
… by measuring the change in longitudinal strain with increasing temperature and volume fraction. Reduction of thermal expansion is demonstrated and related to embedded volume fraction. Classical lamination theory is used to formulate a two-dimensional model which included the adaptive …
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Mechanical and Thermal Properties of Linear Carbon Chains Encapsulated by Multi- and Double -Walled Carbon Nanotubes
… to determine, accurately, mechanical and thermal properties of molecular systems. More specifically, pressure (P) and temperature (T)-dependent Raman spectroscopy allowed us to access elusive mechanical (Young’s modulus (E), Grüneisen parameter (γ), and mechanical strain (ε)) and thermal …
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Ground source heat storage and thermo-physical response of soft clay
… soil temperature can lead to significant plastic strains and a reduction in soil strength. This behavior can be modeled through constitutive formulations that include thermal strain within the elasto-plastic framework of the well-known Modified Cam-Clay Model. The current research uses the MCC …
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Heat management strategies in elite rugby sevens
… large increases in physiological and perceptual thermal strain when compared to the same exercise stimulus performed in temperate conditions. Furthermore, these increases in thermal strain were associated with a large performance decrement. When comparing running to cycling heat response tests, …
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RPE "Drift" in Fit and Unfit Males Cycling in a Hot and Cool Environment
… experienced similar relative cardiovascular and thermal strain. Results indicate that, between fit and unfit males cycling at similar individualized relative intensities, overall and differentiated RPE estimations are not influenced by aerobic fitness level during 60 minutes of exercise in 18 or …
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Development of a co-dispersion binder for the three-dimensional printing process to facilitate handling of ceramic casting shells in the green state
… based on elastic response of a plate to free thermal strain, predicts that flat plates tend to warp into a paraboloid after firing. The experimental results correlated well with this prediction.
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Predicting the Influence of Hydrogen on Zirconium
… properties of the alloy as well as additional strain due to volumetric expansion. With the aid of Finite Element Analysis, this thesis describes models of the diffusion of hydrogen in response to gradients in stress, temperature, and concentration; the nucleation of hydride; and the growth of …
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Assessing Thermal Comfort in Deep Underground Mines
… accepted mode for comprehensively assessing the thermal condition of the mining environment is currently available. Current literature presents several methods and techniques but none of these can expansively assess the underground mine environment since most methods consider only one or a few …
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Photoexcited hypersonic surface acoustic waves propagating under periodic metal grating
Photoinduced strain gradients in nanometer length scales using periodically patterned grating on a substrate is an attractive way of producing coherent surface acoustic waves (SAW). Ultrafast laser pulses incident on this structure produce constrasting thermal strain in the grating and the …
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Field monitoring of integral abutment bridge approach slabs
… slab were instrumented. Changes in concrete strain and temperature at distributed plan locations and at several locations through the slab thickness were measured. Global displacements of the slabs due to thermal deformations were also measured. Results indicate that slab deformations are in …
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Cognitive function during exertional heat stress assessed using traditional and serious game technology
… in increased levels of cardiovascular and thermal strain, while making decisions requiring higher order cognitive abilities e.g. working memory, sustained attention, reaction time, spatial awareness, and information processing. These activities can take place in dangerous conditions with …
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A comparison of bi-directional disc brake rotor passage designs
… heat is dissipated by forced convection and the thermal capacity of the rotor. Catastrophic failure of brake rotors can occur during rapid increases or decreases in rotor temperature where regions of high temperature gradients result in high thermal strains. There is little information in the …
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The Effects of Heat and Cold on Cognitive Function and Endurance Capacity
… systemic physiological and psychological strain. The mechanism for impairments in both cognitive and physical function may be due to early perturbations in whole-body heat balance where the change in skin temperature (even before measurable changes in core temperature) impair performance, …
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